WO2015143605A1 - 预编码矩阵指示的反馈方法、接收方法及装置 - Google Patents

预编码矩阵指示的反馈方法、接收方法及装置 Download PDF

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Publication number
WO2015143605A1
WO2015143605A1 PCT/CN2014/073958 CN2014073958W WO2015143605A1 WO 2015143605 A1 WO2015143605 A1 WO 2015143605A1 CN 2014073958 W CN2014073958 W CN 2014073958W WO 2015143605 A1 WO2015143605 A1 WO 2015143605A1
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WO
WIPO (PCT)
Prior art keywords
sub
bands
pmi
subbands
base station
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PCT/CN2014/073958
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English (en)
French (fr)
Inventor
张雷鸣
吴强
刘江华
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201811537593.XA priority Critical patent/CN109861730A/zh
Priority to CN201480001645.5A priority patent/CN105379139B/zh
Priority to EP14887128.8A priority patent/EP3125437B1/en
Priority to CA2943651A priority patent/CA2943651C/en
Priority to PCT/CN2014/073958 priority patent/WO2015143605A1/zh
Priority to EP18201686.5A priority patent/EP3499737B1/en
Priority to JP2016558632A priority patent/JP6449904B2/ja
Publication of WO2015143605A1 publication Critical patent/WO2015143605A1/zh
Priority to US15/274,240 priority patent/US10305558B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0478Special codebook structures directed to feedback optimisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621Feedback content
    • H04B7/063Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636Feedback format
    • H04B7/0639Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636Feedback format
    • H04B7/0645Variable feedback
    • H04B7/065Variable contents, e.g. long-term or short-short
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02Terminal devices

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a feedback method, a receiving method, and a device for precoding matrix indication. Background technique
  • the codebook-based precoding method pre-stores a codebook (ie, a set of precoding matrices) on the transceiver end, and the receiving end selects the best precoding matrix according to a certain criterion according to the current channel state, and indicates the precoding matrix ( The preceding matrix indicator (PMI) is fed back to the transmitting end. Due to its small feedback and good compatibility, it has been widely used in the field of wireless communication.
  • the embodiment of the present application provides a feedback method, a receiving method, and a device for indicating a precoding matrix, which can match a codebook with a scene with a beam phase change, so that system performance is improved.
  • a user equipment UE
  • the UE includes:
  • a receiving unit configured to receive a reference signal sent by the base station
  • a matrix selecting unit configured to receive the reference signal sent by the receiving unit, and select, according to the reference signal, a first subband of each of the N first subbands in the system transmission bandwidth from the codebook a precoding matrix, where the codebook includes at least two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating PMI and a second PMI, where the N first subbands are Each of the first sub-bands corresponds to a second PMI, and each of the M second sub-bands corresponds to a first PMI, and the M second sub-bands are from the N first sub-bands Determining in the band, and at least one of the M second sub-bands includes at least two first sub-bands, N and M are positive integers not less than 2;
  • a sending unit configured to: after the matrix selecting unit selects one precoding matrix for each first subband, feed back a first PMI corresponding to each second subband to the base station, and send each first sub A corresponding second PMI is fed back to the base station.
  • the N first sub-bands are all sub-bands or partial sub-bands on one of the system transmission bandwidths.
  • the UE further includes a first reporting unit, configured, by the matrix selecting unit, based on the reference signal, from a codebook, a N in a system transmission bandwidth When each of the first subbands selects a precoding matrix, the value of the M is reported to the base station.
  • the UE further includes a first M value determining unit, configured to report the value of the pre-selected M to the base station, and receive the feedback from the base station.
  • the value of M, the value of the M is determined by the base station based on the value of the pre-selected M.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands is Base station configured.
  • the UE further includes a second reporting unit, configured, by the matrix selecting unit, based on the reference signal, from a codebook, a N in a system transmission bandwidth When each of the first sub-bands selects a pre-coding matrix, the number of the first sub-bands included in each of the M second sub-bands is reported to the base station .
  • the value of the M and/or the number of the first sub-bands included in each second sub-band of the M second sub-bands is Defined.
  • the UE further includes a second M value determining unit, configured to determine a channel estimate based on the reference signal, and further, according to the channel estimate and the codebook And determining a value of the M, wherein a system capacity when the M second sub-bands are selected is greater than a threshold value of a system capacity when the M-1 second sub-bands are selected.
  • At least two second sub-bands of the M second sub-bands The first PMI corresponding to the band is different.
  • the second sub-band of each of the M second sub-bands is frequency continuous or frequency discontinuous.
  • each precoding matrix in the codebook may be represented as
  • Wi is represented by the first PMI and W 2 is represented by the second PMI.
  • the values of the M corresponding to the at least two UEs are different.
  • At least two UEs corresponding to the M second sub-bands At least two UEs corresponding to the M second sub-bands Each second sub-band includes a different number of first sub-bands.
  • a base station where the base station includes:
  • a sending unit configured to send a reference signal to the UE
  • a receiving unit configured to receive each of the second PMI and the second second subband corresponding to each of the N first subbands in the system transmission bandwidth fed back by the UE Corresponding first PMI, wherein the M second sub-bands are determined from the N first sub-bands, and at least one second sub-band of the M second sub-bands includes at least two a first sub-band, N and M are both positive integers not less than 2, the base station has a codebook, and the code includes at least two precoding matrices, according to the first corresponding to each of the second subbands The PMI and the second PMI corresponding to each of the first sub-bands select a corresponding pre-coding matrix from the codebook.
  • the N first sub-bands are all sub-bands or partial sub-bands on one of the transmission bandwidths of the system.
  • the receiving unit is further configured to: after the base station sends a reference signal to the UE, receive the value of the M reported by the UE.
  • the receiving unit is further configured to receive a value of the pre-selected M reported by the UE, where the base station further includes an M value determining unit, configured to receive the Deriving the value of the pre-selected M sent by the receiving unit, and determining the value of the M according to the value of the pre-selected M.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands is Base station configured.
  • the receiving unit is further configured to: after the base station sends a reference signal to the UE, receive, in each of the M second subbands reported by the UE The number of first sub-bands included in the second sub-band.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands is Defined.
  • At least two second sub-bands of the M second sub-bands Corresponding first PMI is not the same.
  • each of the M second sub-bands The first sub-band included is frequency continuous or frequency discontinuous.
  • each precoding matrix in the codebook may be represented as
  • Wi is represented by the first PMI and W 2 is represented by the second PMI.
  • the values of M corresponding to at least two UEs are different.
  • each of the M second sub-bands corresponding to at least two UEs contains different numbers of the first sub-bands.
  • a feedback method for precoding matrix indication comprising:
  • the user equipment UE receives the reference signal sent by the base station
  • the UE selects, according to the reference signal, a precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook, where the codebook includes at least two pre- An encoding matrix, and each precoding matrix is represented by at least a first precoding matrix indicating PMI and a second PMI, wherein each of the N first subbands corresponds to a second PMI, M Each of the second sub-bands corresponds to a first PMI, the M second sub-bands are determined from the N first sub-bands, and the M second sub-bands There is at least one second sub-band comprising at least two first sub-bands, N and M being positive integers not less than 2;
  • the UE feeds back a first PMI corresponding to each second subband to the base station, and feeds back a second PMI corresponding to each first subband to the base station.
  • the N first sub-bands are all sub-bands or partial sub-bands on one of the system transmission bandwidths.
  • the UE selects, according to the reference signal, a first subband of the N first subbands in the system transmission bandwidth from the codebook.
  • the method further includes: the UE reporting the value of the M to the base station.
  • the determining the value of the M specifically includes: the UE reporting the value of the pre-selected M to the base station; The value of the M that is fed back, the value of the M being determined by the base station based on the value of the pre-selected M.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands is The base station is configured.
  • the UE selects, according to the reference signal, a first subband of the N first subbands in the system transmission bandwidth from the codebook.
  • the method further includes: reporting, by the UE, the number of the first subbands included in each of the M second subbands to the base station.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands is Defined.
  • the determining the value of the M specifically includes: determining, by the UE, a channel estimation based on the reference signal;
  • the codebook determines a value of the M, wherein a system capacity when the M second subbands are selected is greater than a threshold value of a system capacity when the M-1 second subbands are selected.
  • At least two second sub-bands of the M second sub-bands The first PMI corresponding to the band is different.
  • the second second sub-band of each of the M second sub-bands is frequency continuous or frequency discontinuous.
  • Wi is represented by the first PMI and W 2 is represented by the second PMI.
  • the values of the M corresponding to the at least two UEs are different.
  • At least two UEs corresponding to the M second sub-bands Each second sub-band includes a different number of first sub-bands.
  • a method for receiving a precoding matrix indication comprising:
  • the base station sends a reference signal to the UE
  • the base station receives, by the base station, a second PMI corresponding to each of the first sub-bands of the N first sub-bands and a second sub-band of the M second sub-bands a first PMI, wherein the M second sub-bands are determined from the N first sub-bands, and at least one of the M second sub-bands includes at least two a subband, N and M are both positive integers not less than 2, the base station has a codebook, and the codebook includes at least two precoding matrices, and can be first according to each of the second subbands The PMI and the second PMI corresponding to each of the first sub-bands select a corresponding pre-coding matrix from the codebook.
  • the N first sub-bands are all sub-bands or partial sub-bands on one of the transmission bandwidths of the system.
  • the method further includes: the base station receiving the value of the M reported by the UE.
  • the determining the value of the M includes: receiving, by the base station, a value of a pre-selected M reported by the UE; The value of M is selected to determine the value of the M.
  • the value of the M and/or the number of the first sub-bands included in each second sub-band of the M second sub-bands is Base station configured.
  • the base station sends a reference to the UE After the signal, the method further includes: the base station receiving, by the base station, the number of first sub-bands included in each of the M second sub-bands reported by the UE.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands is Defined.
  • a seventh possible implementation at least two second sub-bands of the M second sub-bands The corresponding first PMI is different.
  • each of the M second sub-bands The first sub-band included is frequency continuous or frequency discontinuous.
  • each precoding matrix in the codebook may be represented as
  • Wi is represented by the first PMI and W 2 is represented by the second PMI.
  • the values of M corresponding to at least two UEs are different.
  • each of the M second sub-bands corresponding to at least two UEs contains different numbers of the first sub-bands.
  • a UE is provided, where the UE includes:
  • a receiver configured to receive a reference signal sent by the base station
  • a processor configured to select, according to the reference signal, a precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook, where the codebook includes at least two a precoding matrix, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, wherein each of the N first subbands corresponds to a second PMI, Each of the M second sub-bands corresponds to a first PMI, the M second sub-bands are determined from the N first sub-bands, and the M second sub-bands There is at least one second child in the band
  • the strip includes at least two first sub-bands, N and M being positive integers not less than 2;
  • a transmitter configured to feed back a first PMI corresponding to each second subband to the base station, and feed back a second PMI corresponding to each first subband to the base station.
  • the N first sub-bands are all sub-bands or partial sub-bands on one of the transmission bandwidths of the system.
  • the transmitter is configured to: in the N first subbands in a system transmission bandwidth, from the codebook, based on the reference signal, by the processor When each of the first sub-bands selects a pre-coding matrix, the value of the M is reported to the base station.
  • the transmitter is further configured to report a value of the pre-selected M to the base station, where the receiver is further configured to receive the feedback from the base station.
  • the value of M, the value of the M is determined by the base station based on the value of the pre-selected M.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands is The base station is configured.
  • the transmitter is configured, by the processor, based on the reference signal, from a codebook to N first subbands in a system transmission bandwidth When each of the first sub-bands selects a pre-coding matrix, the number of the first sub-bands included in each of the M second sub-bands is reported to the base station.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands is Defined.
  • the processor is specifically configured to determine a channel estimation based on the reference signal, and determine, according to the channel estimation and the codebook, the M The value, wherein the system capacity when the M second sub-bands are selected is greater than the threshold value of the system capacity when the M-1 second sub-bands are selected.
  • At least two second sub-bands of the M second sub-bands The first PMI corresponding to the band is different.
  • each of the M second sub-bands includes a first sub-band that is frequency continuous or frequency discontinuous.
  • each precoding matrix in the codebook may be represented as
  • Wi is represented by the first PMI and W 2 is represented by the second PMI.
  • the values of M corresponding to at least two UEs are different.
  • At least two UEs corresponding to the M second sub-bands Each second sub-band includes a different number of first sub-bands.
  • a base station where the base station includes:
  • a transmitter configured to send a reference signal to the UE
  • a receiver configured to receive each of the second PMI and the second second sub-band corresponding to each of the first sub-bands of the system transmission bandwidths fed back by the UE Corresponding first PMI, wherein the M second sub-bands are determined from the N first sub-bands, and at least one second sub-band of the M second sub-bands includes at least two First sub-bands, N and M are positive integers not less than 2;
  • a memory configured to store a codebook, where the codebook includes at least two precoding matrices;
  • a processor configured to select a corresponding precoding matrix from the codebook according to the first PMI corresponding to each of the second subbands and the second PMI corresponding to each of the first subbands.
  • the N first sub-bands are all sub-bands or partial sub-bands on one of the transmission bandwidths of the system.
  • the receiver is further configured to: after the transmitter sends a reference signal to the UE, receive the value of the M reported by the UE.
  • the receiver is further configured to receive a value of the pre-selected M reported by the UE, where the processor is further configured to perform, according to the pre-selected M The value of the M is determined.
  • the value of the M and/or the number of the first sub-bands included in each second sub-band of the M second sub-bands is Base station configured.
  • the receiver is further configured to: after the transmitter sends a reference signal to the UE, receive the M second sub-bands reported by the UE The number of first sub-bands included in each second sub-band.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands is Defined.
  • a seventh possible implementation manner at least two second sub-bands of the M second sub-bands The corresponding first PMI is different.
  • each of the M second sub-bands The first sub-band included is frequency continuous or frequency discontinuous.
  • each precoding matrix in the codebook may be represented as
  • Wi is represented by the first PMI and W 2 is represented by the second PMI.
  • the values of M corresponding to at least two UEs are different.
  • each of the M second sub-bands corresponding to at least two UEs contains different numbers of the first sub-bands.
  • the technical solution of the present application is to select a precoding matrix from the codebook based on the received reference signal sent by the base station, and send a precoding matrix indicating PMI corresponding to the precoding matrix to the Base station, since M second sub-bands are determined from N first sub-bands, And feeding back a first PMI for each second sub-band, so that multiple first PMIs are fed back to the base station, and each first PMI corresponds to a beam phase change range, so that when the beam phase changes greatly
  • the beam phase variation of the entire bandwidth may be covered by multiple first precoding matrices, and the beam quantization granularity may be improved by multiple first precoding matrices in a scene with a small beam phase variation, thereby making the codebook and The scenes of the beam phase are matched to improve system performance.
  • FIG. 1 is a flowchart of a method for feeding back a precoding matrix indication according to an embodiment of the present invention
  • FIG. 2 is a first structural diagram of determining M second sub-bands from N first sub-bands according to an embodiment of the present invention
  • FIG. 3 is a second structural diagram of determining M second sub-bands from N first sub-bands according to an embodiment of the present invention
  • FIG. 4 is a structural diagram of interaction between a user equipment and a base station in the embodiment of the present application.
  • FIG. 5 is a flowchart of a method for receiving a precoding matrix indication according to an embodiment of the present application
  • FIG. 6 is a first structural diagram of a UE in an embodiment of the present application.
  • FIG. 7 is a second structural diagram of a UE in an embodiment of the present application.
  • FIG. 8 is a first structural diagram of a base station in an embodiment of the present application.
  • FIG. 9 is a second structural diagram of a base station in an embodiment of the present application. detailed description
  • the technical solution proposed in the embodiment of the present invention is to select a precoding matrix from the codebook based on the received reference signal sent by the base station. And transmitting, to the base station, a precoding matrix indicating PMI corresponding to the precoding matrix, wherein the M second subbands are determined from the N first subbands, and each second subband is fed back a first PMI, and M is an integer not less than 2, such that a plurality of first PMIs are fed back to the base station, and a first PMI corresponds to a beam phase change range, so that when the beam phase changes greatly,
  • the entire bandwidth wave can be covered by multiple first precoding matrices
  • the beam phase changes, and when the beam phase changes little, the beam quantization granularity can be improved by the plurality of first precoding matrices, and the codebook and the beam phase scene are matched, so that the system performance is improved.
  • the embodiment of the present invention provides a feedback method for precoding matrix indication. As shown in FIG. 1, the specific processing procedure of the method is as follows:
  • Step S101 The UE receives a reference signal sent by the base station.
  • Step S102 The UE selects, according to the reference signal, a precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook, where the codebook at least includes Two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, wherein each of the N first subbands corresponds to a second PMI.
  • Each of the M second sub-bands corresponds to a first PMI, the M second sub-bands are determined from the N first sub-bands, and the M second At least one second sub-band in the sub-band includes at least two first sub-bands, N and M are positive integers not less than 2;
  • Step S103 The UE feeds back a first PMI corresponding to each second sub-band to the base station, and feeds back a second PMI corresponding to each first sub-band to the base station.
  • step S101 the UE receives the reference signal sent by the base station.
  • the reference signal may include a channel state information reference signal (CSI RS) or a demodulation reference signal (demodulation RS, DM RS for short) or a cell-specific reference signal (cell- Specific RS, referred to as CRS).
  • CSI RS channel state information reference signal
  • demodulation RS demodulation reference signal
  • DM RS cell-specific reference signal
  • CRS cell- Specific RS
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the UE may further receive a Radio Resource Control (RRC) signaling sent by the base station, based on the RRC. Signaling, acquiring the reference signal.
  • RRC Radio Resource Control
  • step S102 is performed, in which the UE selects a precoding matrix from the codebook for each first subband of the N first subbands in the system transmission bandwidth based on the reference signal.
  • the codebook includes at least two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, where each of the N first subbands a sub-band corresponding to a second PMI, each of the M second sub-bands corresponding to a first PMI, the M second sub-bands being determined from the N first sub-bands And at least one second sub-band of the M second sub-bands includes at least two first sub-bands, and N and M are positive integers not less than 2.
  • the UE after receiving the reference signal, the UE selects a pre-selection from the codebook for each first sub-band of the N first sub-bands based on the reference signal.
  • An encoding matrix, each of the precoding matrices in the codebook being represented by at least a first PMI and a second PMI, wherein the system transmission bandwidth is a system transmission bandwidth of a carrier configured for the UE for channel measurement,
  • the N first subbands in the system transmission bandwidth are determined according to a definition in a protocol between the UE and the base station.
  • the N first subbands are all subbands or partial subbands in the system transmission bandwidth, and the UE and the base station determine the same N firsts based on the same manner.
  • the sub-bands, where the bandwidth corresponding to each of the first sub-bands may be the same or different.
  • the UE may divide the system transmission bandwidth into N first sub-bands by means of a uniform halving method or a non-divided manner.
  • the UE divides the system transmission bandwidth by a uniform halving method, and divides 20 MHz into four first sub-bands, each of the first sub-bands.
  • the corresponding bandwidth is 5 MHz; if the UE divides the system transmission bandwidth by a non-equal division method, the 20 MHz is divided into four first sub-bands, wherein the four first sub-bands are, for example, the first one.
  • the bandwidth corresponding to the first sub-band is 4 MHz
  • the bandwidth corresponding to the second first sub-band is 6 MHz
  • the bandwidth corresponding to the third first sub-band is 3 MHz
  • the bandwidth corresponding to the fourth first sub-band is 7 M, etc.
  • the bandwidth corresponding to each first sub-band is 2 MHz.
  • the UE receives the reference signal, select a precoding matrix from the codebook for each of the five first subbands.
  • the precoding matrix is specifically shown in Table 1 below.
  • 1Q represents a second PMI
  • the UE after receiving the reference signal, the UE selects a first PMI for each second sub-band, where the value of the first PMI corresponds to the first in each of the second sub-bands in Table 2
  • Each of the first sub-bands in the sub-band selects a second PMI, and the value of the second PMI corresponds to ⁇ in Table 1, where i 2 corresponds to the pre-coding matrix.
  • the number and rank of the transmit antennas to which the present invention is applicable may be any positive integer.
  • the criterion for the UE to select the precoding matrix from the table 1 or the table 2 may be a channel capacity maximization criterion, a throughput maximization criterion or a chord distance minimization criterion, and the like.
  • each precoding matrix in the codebook can be represented as
  • W ⁇ ⁇ W 2 Formula (1) where Wi is represented by the first PMI and W 2 is represented by the second PMI.
  • the vector matrix of ⁇ can be expressed as:
  • N is a power of 2 and k is an integer.
  • ...,! ⁇ is a non-negative integer
  • ⁇ n ⁇ n ..., ! ⁇ is a continuous non-negative integer
  • the corresponding P beam vectors are continuous.
  • is a non-continuous non-negative integer
  • the corresponding yangko beam vector is discontinuous. .
  • each of the second sub-bands individually corresponds to a first frame
  • each of the first sub-frames corresponds to one such that each of the second sub-bands corresponds to a single one so that the A sub-band corresponds
  • the B sub-band corresponds to ⁇ 2
  • C subband corresponds to ⁇ 3
  • D subband corresponds to ⁇ 4
  • A, B, C, and D are all second subbands, since each ⁇ contains P consecutive or discontinuous beam vectors,
  • Each of the second sub-bands has P consecutive or discontinuous beam vectors, which in turn enables the quantized granularity accuracy of the beam vector to be improved.
  • the N first subbands are also needed. Determining the M second sub-bands, wherein all the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one The second sub-band is included, wherein, since each of the M second sub-bands corresponds to a first PMI, the second sub-band included in the at least two first sub-bands is included All first sub-bands correspond to the same first PMI.
  • the UE when determining the M second subbands from the N first subbands, the UE first determines a value of the M, and according to the value of the M, from the N Determining the M second sub-bands in a sub-band, where the determining, by the UE, the value of the M is determined according to the UE configuration manner, for example, after determining the value of the M Subdividing the N first sub-bands into the M second sub-bands, and since at least one second sub-band includes at least two first sub-bands, such that the value of the M is smaller than the N value.
  • the step of determining, by the UE, the value of the M includes: determining, by the UE, a channel estimation based on the reference signal; determining, by the UE, the M according to the channel estimation and the codebook. a value, wherein a system capacity when the M second sub-bands are selected is greater than a threshold value when a system capacity of the M-1 second sub-bands is selected, and of course, the M numbers may be selected. Two The system performance gain when the subband ratio is M1 second subbands is greater than the threshold value, and the system performance includes system capacity, system throughput, system spectrum efficiency, and the like.
  • the threshold is determined according to an actual situation, and the value of the M is not greater than the codebook.
  • the number of precoding matrices in the matrix for example, the number of the precoding matrices is 5, and the value of the M is at most 5 and the minimum is 2.
  • the first system capacity is A
  • the second system capacity obtained by acquiring the three second sub-bands is B
  • the obtained four second sub-bands are obtained.
  • the third system capacity is C, where the first difference between the second system capacity and the first system capacity is BA, and the first difference is selecting three second sub-bands and selecting two
  • the capacity difference of the two sub-bands is CB.
  • the second difference is that four second sub-bands are selected and three are selected.
  • the capacity gain of the second sub-band if the threshold is D, if (BA ⁇ D, and if (CB) ⁇ D, it can be determined that the M is 3, and if (CB)>D, then continue Obtaining whether the difference between the system capacity obtained by selecting the 5 second sub-bands and the third system capacity obtained by selecting the 4 second sub-bands is less than D, and if less than D, determining that the M is 4, if not Less than 0, until the system capacity obtained by selecting K second sub-bands is obtained and K-1 second sub-bands are selected The difference in the system capacity is less than D.
  • the K-1 is smaller than the number of precoding matrices in the codebook, it may be determined that the M is K1, if the K-1 is not smaller than the codebook. In the number of precoding matrices, the number of precoding matrices is taken as the value of the M.
  • the UE may divide the N first sub-bands into the M firsts by using a continuous bandwidth division manner or a discontinuous bandwidth division manner.
  • the frequencies corresponding to the adjacent two first sub-bands in each of the second sub-bands are continuous; and are divided by the discontinuous bandwidth division manner
  • At least one of the adjacent two first sub-bands in each of the second sub-bands has a discontinuity in frequency.
  • the UE may also determine the value of the M by using the UE configuration manner.
  • the determining manner of determining the M second sub-bands from the N first sub-bands may be determined, where the determining manner is, for example, a continuous bandwidth partitioning manner or a discontinuous bandwidth partitioning manner; the UE may also determine The value of the M is determined at the same time, and the determining manner of determining the M second sub-bands from the N first sub-bands is determined, which is not specifically limited in this application.
  • the M first sub-bands correspond to the M first PMIs, such that each of the first PMIs corresponds to a part of the system transmission bandwidth, and each part of the system transmission bandwidth has a corresponding bandwidth.
  • a PMI such that the M first PMIs cover the beam phase variation of the transmission bandwidth of the system, reducing system performance loss; and because each first PMI corresponds to only a part of the transmission bandwidth of the system, thereby making the quantized granularity of the beam vector Accuracy is improved.
  • the first PMI corresponding to at least two of the M second sub-bands is different.
  • the UE divides the N first sub-bands into M in the continuous bandwidth division manner.
  • the N first subbands are subband 0, subband 1, subband 2, subband 3, subband 4, subband 5, Sub-band 6, sub-band 7, sub-band 8, and sub-band 9, then determine four second sub-bands from the N first sub-bands, for example, the four second sub-bands are A sub-band, B sub- a band, a C subband, and a D subband, wherein the A subband includes a subband 0, a subband 1 and a subband 2, and since the A subband corresponds to the first first PMI, the subband 0, the subband 1 and the subband 2 corresponds to the first first PMI; the B sub-band includes sub-band 3, sub-band 4 and sub-band 5, since the B sub-band corresponds to the second
  • the A, B, C, and D sub-bands are the four second sub-bands, and the sub-band 0, the sub-band 1, the sub-band 2, the sub-band 3, the sub-band 4, the sub-band 5, and the sub-band 6 , sub-band 7, sub-band 8 and sub-band 9 are said N
  • the first sub-bands enable the UE to determine the number of first sub-bands included in each of the four second sub-bands.
  • the UE after determining, according to the channel estimation and the codebook, that the value of the M is 4, the UE performs the N first in the discontinuous bandwidth division manner.
  • the subband is divided into M second subbands, if the system transmission bandwidth is 10 MHz, and the N first subbands are subband 10, subband 11, subband 12, subband 13, subband 14 a sub-band 15, a sub-band 16, a sub-band 17, a sub-band 18, and a sub-band 19, dividing the N first sub-bands into four second sub-bands in the discontinuous bandwidth division manner, such that the 4
  • the second sub-bands are an A1 sub-band, a B1 sub-band, a C1 sub-band and a D1 sub-band, wherein the A1 sub-band includes a sub-band 10, a sub-band 12 and a sub-band 14, and the B1 sub-band includes a sub-band 11, and a sub-band 13 And a sub-band 15, the C1 sub-
  • the Al, Bl, CI, and D1 sub-bands are the four second sub-bands
  • the sub-band 10 the sub-band 11, the sub-band 12, the sub-band 13, the sub-band 14, the sub-band 15, and the sub-band 16
  • the sub-band 17, the sub-band 18, and the sub-band 19 are the N first sub-bands, such that the UE can determine the first sub-band included in each of the four second sub-bands Number.
  • each of the second sub-bands individually corresponds to one first PMI
  • each of the first PMIs corresponds to one W l 7 such that each second sub-band individually corresponds to one W l 7 such that the A1 sub-band corresponds to W, B1 sub-band correspondence, C1 sub-band correspondence, and D1 sub-band correspondence
  • each ⁇ contains P consecutive or discontinuous beam vectors
  • each second sub-band has P consecutive or discontinuous The beam vector, which in turn, results in improved quantized granularity accuracy of the beam vector.
  • the value of the M is determined according to the channel estimation and the codebook, and when different UEs are in different environments, corresponding channel characteristic parameters such as angular spread, frequency correlation, spatial correlation, and/or If the codebooks are different, the number of second sub-bands corresponding to different UEs may be the same or different, and the values of M corresponding to at least two UEs may be the same or not the same.
  • system transmission bandwidths corresponding to different UEs may be the same or different, and the system transmission bandwidth may be divided into N first sub-bands by a uniform halving method or a non-division manner, so that different determinities may be determined.
  • the value of the N corresponding to the UE may be the same or different, and the number of the second sub-bands corresponding to the different UEs may be the same or different.
  • the Each of the M second sub-bands corresponding to the two UEs includes the number of the first sub-bands that are different; and when the two values of the two UEs are the same, and the M values are the same, the Each of the M second sub-bands corresponding to the two UEs may include the same number of the first sub-bands, such that each of the M second sub-bands corresponding to at least two UEs The second sub-band includes the number of first sub-bands that are different or the same.
  • the method when the UE selects one precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook based on the reference signal, the method further The method includes: reporting, by the UE, the value of the M to the base station.
  • the UE reports the value of the M to the base station, so that the base station can receive the value of the M, and use the UE.
  • the M second sub-bands are determined from the N first sub-bands in the same manner.
  • step S103 is performed, in which the UE feeds back the first PMI corresponding to each second sub-band to the base station, and feeds back the second PMI corresponding to each first sub-band to the base station.
  • the UE determines, by using step S103, a first PMI corresponding to each of the M second sub-bands, and determining each of the N first sub-bands. After the second PMI corresponding to the subband, the first PMI corresponding to each second subband is fed back to the base station, and the second PMI corresponding to each first subband is fed back to the base station.
  • the first PMI and the second PMI have different time domains or frequency domain granularity, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband.
  • the first PMI corresponds to an entire frequency bandwidth
  • the second PMI corresponds to an entire frequency band or a subband.
  • the precoding matrix corresponding to subband 0 is W ⁇
  • the precoding matrix corresponding to subband 1 is 3 ⁇ 4 2 and the precoding matrix corresponding to subband 2 is W 2 ( 21 , subband 3 corresponding
  • the precoding matrix is W 2 ⁇ 3
  • the precoding matrix corresponding to subband 4 is w 2 +11
  • the precoding matrix corresponding to subband 5 is w 2 S +2 , 3
  • the precoding matrix corresponding to subband 6 is sum and subband
  • the corresponding precoding matrix of 7 is 3 ⁇ 4 3
  • the precoding matrix corresponding to the subband 8 is w ⁇ corresponding to the subband 9 , so that it can be determined that sub-band 0, sub-band 1 and sub-band 2 correspond to ii of 4 , that is, the first PMI corresponding to the A subband is 4, and the ii corresponding to the subband 3, the subband 4, and the subband 5 is 7, that is, the first PMI corresponding to the B subband is 7, the subband 6
  • the first PMI corresponding to the A subband is 4, the first PMI corresponding to the B subband is 7, the first PMI corresponding to the C subband is 9, and the first PMI corresponding to the D subband is 11 for feedback.
  • the second PMI corresponding to subband 0 is 0, the second PMI corresponding to subband 1 is 2, the second PMI corresponding to subband 2 is 9, and the second PMI corresponding to subband 3 is 3, and subband 4 corresponds to The second PMI is 5, the second PMI corresponding to subband 5 is 11, the second PMI corresponding to subband 7 is 3, and the second PMI corresponding to subband 8 is 3. , and the second PMI corresponding to the sub-band 9 is 10 for feedback.
  • the UE may determine a value of the M and a first PMI corresponding to each second sub-band of the M second sub-bands by using a pre-channel and a codebook, and determining the a second PMI corresponding to each of the first sub-bands of the M second sub-bands, and then feeding back the first PMI corresponding to each second sub-band and the second PMI corresponding to each first sub-band to the base station .
  • the UE may first feed back each After the second PMI corresponding to the first PMI, and then determining the second PMI corresponding to each of the M second sub-bands, each of the N first sub-bands is first The second PMI corresponding to the subband is fed back to the base station.
  • the UE determines the M according to the channel estimation and the codebook. a value of 4 and a first PMI corresponding to each of the second sub-bands, if the four second sub-bands are A sub-band, B sub-band, C sub-band, and D sub-band, Determining, according to the channel estimation and the codebook, that the first PMI corresponding to the A subband is 4, the first PMI corresponding to the B subband is 7, the first PMI corresponding to the C subband is 9, and the D subband corresponds to The first PMI is 11, and then the second PMI corresponding to each of the second sub-bands of the A sub-band, the B sub-band, the C sub-band, and the D sub-band is fed back, and then the sub-sub-band included in the A sub-band is determined.
  • the second PMI corresponding to 0 is 0, the second PMI corresponding to subband 1 is 2, and the second PMI corresponding to subband 2 is 9; the second PMI corresponding to subband 3 included in the B subband is 3, subband 4 corresponding second PMI is 5 and the second PMI corresponding to the sub-band 5 is 11; and the second PMI corresponding to the sub-band 6 included in the C sub-band is 1 and the second PMI corresponding to the sub-band 7 is 3;
  • the second PMI corresponding to the sub-band 8 included in the band is 3, and the second PMI corresponding to the sub-band 9 is 10, and the second PMI corresponding to each of the first sub-bands of the sub-band 0-sub-band 9 is fed back to the Said base station.
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the Said base station.
  • an encoding method such as joint coding or differential coding
  • the UE may send the first PMI and the second PMI to the base station by using a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column permutation.
  • the technical solution of the embodiment of the present application can be applied to a multiple-input multiple-output (MIM0) wireless system.
  • MIM0 multiple-input multiple-output
  • the UE sends a PMI to the base station, where the PMI may be a specific value.
  • the PMI sent by the UE to the base station is 20, it is determined that the precoding matrix is an encoding matrix with a label of 20.
  • the UE selects a precoding matrix from the codebook for each first subband of the N first subbands in the system transmission bandwidth according to the received reference signal sent by the base station. And feeding back a first PMI corresponding to each second sub-band to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station can receive the Determining the value of the M by a quantity of PMI, and determining, according to the value of the M, the M second sub-bands from the N first sub-bands in the same manner as the UE, Then, according to the first PMI and the second PMI fed back by the UE, obtaining a precoding matrix corresponding to each first subband, according to the obtained encoding manner corresponding to the precoding matrix corresponding to each first subband To transfer data.
  • the UE When the UE selects a precoding matrix for each first subband in the N first subbands in the system transmission bandwidth according to the received reference signal sent by the base station, The UE reports the value of the M to the base station, so that the base station can use the same value as the UE according to the value of the M before receiving the first PMI and the second PMI fed back by the UE.
  • the method determines the M second sub-bands from the N first sub-bands, so that when the first PMI and the second PMI fed back by the UE are received again, the A sub-band with a corresponding precoding matrix improves work efficiency.
  • the technical solution of the present application is to select a precoding matrix from the codebook based on the received reference signal sent by the base station, and send a precoding matrix indicating PMI corresponding to the precoding matrix to the a base station, wherein the M second subbands are determined from the N first subbands, and a first PMI is fed back for each of the second subbands, so that the plurality of first PMIs are fed back to the base station, and one
  • the first PMI corresponds to a beam phase change range, so that when the beam phase changes greatly, the beam phase change of the entire bandwidth can be covered by multiple first precoding matrices, and in a scenario where the beam phase changes little,
  • the beam quantization granularity can be improved by the plurality of first precoding matrices, thereby matching the codebook with the beam phase scene, so that the system performance is improved.
  • each of the first PMIs corresponds to a part of the system transmission bandwidth, and each part of the system transmission bandwidth has a bandwidth Corresponding first PMI, and M is an integer not less than 2, such that the beam phase variation of the entire system transmission bandwidth is covered by the plurality of first PMIs, thereby reducing system performance loss; and since each first PMI only corresponds to the A portion of the system's transmission bandwidth, which in turn results in improved quantized granularity accuracy of the beam vector.
  • a second embodiment of the present invention provides a feedback method for precoding matrix indication. As shown in FIG. 1, the specific processing procedure of the method is as follows:
  • Step S101 The UE receives a reference signal sent by the base station.
  • Step S102 The UE selects, according to the reference signal, a precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook, where the codebook at least includes Two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, wherein each of the N first subbands corresponds to a second PMI.
  • Each of the M second sub-bands corresponds to a first PMI, the M second sub-bands are determined from the N first sub-bands, and the M second At least one second sub-band in the sub-band includes at least two first sub-bands, N and M are positive integers not less than 2;
  • Step S103 The UE feeds back a first PMI corresponding to each second sub-band to the base station, and feeds back a second PMI corresponding to each first sub-band to the base station.
  • step S101 the UE receives the reference signal sent by the base station.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the UE may further receive the RRC signaling sent by the base station, and acquire the reference signal based on the RRC signaling.
  • step S102 is performed, in which the UE is based on the reference signal, the code A precoding matrix is selected for each first subband of the N first subbands in the system transmission bandwidth, where the codebook includes at least two precoding matrices, and each precoding matrix is at least The first precoding matrix indicates a PMI and a second PMI representation, wherein each of the N first subbands corresponds to a second PMI, and each of the M second subbands a band corresponding to a first PMI, the M second sub-bands are determined from the N first sub-bands, and at least one of the M second sub-bands includes at least two The first sub-band, N and M are positive integers not less than 2.
  • the UE after receiving the reference signal, the UE selects a pre-selection from the codebook for each first sub-band of the N first sub-bands based on the reference signal.
  • An encoding matrix, each of the precoding matrices in the codebook being represented by at least a first PMI and a second PMI, wherein the system transmission bandwidth is a system transmission bandwidth of a carrier configured for the UE for channel measurement,
  • the N first subbands in the system transmission bandwidth are determined according to a definition in a protocol between the UE and the base station.
  • the N first subbands are all subbands or partial subbands in the system transmission bandwidth, and the UE and the base station determine the same N firsts based on the same manner.
  • the sub-bands, where the bandwidth corresponding to each of the first sub-bands may be the same or different.
  • the UE may divide the system transmission bandwidth into N first sub-bands by means of a uniform halving method or a non-divided manner.
  • the N first subbands are also needed. Determining the M second sub-bands, wherein all the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one The second sub-band is included, wherein, since each of the M second sub-bands corresponds to a first PMI, the second sub-band included in the at least two first sub-bands is included All first sub-bands correspond to the same first PMI.
  • the first PMI corresponding to at least two second sub-bands of the M second sub-bands is different, so that the beam phase change of the system transmission bandwidth can be covered by different first PMIs, thereby reducing the beam phase variation. Loss of system performance, which improves the accuracy of the quantized granularity of the beam vector.
  • the first PMI corresponding to at least two of the M second sub-bands is different.
  • the UE when determining the M second subbands from the N first subbands, the UE first determines a value of the M, and according to the value of the M, from the N Determining the M second sub-bands in a sub-band, where the determining, by the UE, the value of the M is determined according to the UE feedback manner, and determining, by using the UE feedback manner, The determining step of the value of M, the method for determining the value of the M, the method further includes: the UE reporting the value of the pre-selected M to the base station; the UE receiving the value of the M fed back by the base station, The value of M is determined by the base station based on the value of the pre-selected M.
  • the UE selects a value of the pre-selected M, and then reports the value of the pre-selected M to the base station.
  • the base station determines the value of the M according to the value of the pre-selected M, and the base station feeds back the determined value of the M to the UE, so that the The UE can receive the value of the M.
  • the determining, by the base station, the value of the M according to the value of the pre-selected M, the value of the M may be a value of the pre-selected M, or may be greater than or less than the pre-selected
  • the value of M is not specifically limited. For example, if the value of the pre-selected M is 3, the value of the M may be 3 or a value greater than 3, for example, 4. 5, etc.; may also be a value less than 3, for example, 2 or the like.
  • the user equipment first determines the value of the pre-selected M, and the value of the pre-selected M is, for example, an integer of 2, 3, 4, etc., not less than 2, and then performs step S401 to send a pre-selection.
  • the value of M is such that the base station can receive the value of the pre-selected M.
  • the base station After receiving the value of the pre-selected M, the base station performs step S402, and determines the M according to the value of the pre-selected M. After the value of the M is determined by the step S402, the base station performs step S403 to feed back the value of the M, so that the user equipment can receive the value of the M fed back by the base station, and then based on the value of the M.
  • the M second sub-bands are determined from the N first sub-bands.
  • a continuous bandwidth division manner or a discontinuous bandwidth division manner wherein the N first sub-bands are divided into the M second sub-bands, and when each is divided by the continuous bandwidth division manner, each of the The frequencies corresponding to the adjacent two first sub-bands in the two sub-bands are continuous; when divided in the discontinuous bandwidth partition manner, at least one set of adjacent two in each of the second sub-bands exists The frequency corresponding to the first sub-band is discontinuous.
  • the determining manner of determining the M second sub-bands from the N first sub-bands may be determined, where the determining manner is, for example, a continuous bandwidth partitioning manner or a discontinuous bandwidth partitioning manner.
  • the UE further The determining manner of determining the M second sub-bands from the N first sub-bands may be determined while determining the value of the M, which is not specifically limited in this application.
  • the base station determines, according to the value of the pre-selected M, that the value of the M is 4, and then 4, the user equipment is sent, so that the user equipment determines that the value of the M is 4, and then divides the N first sub-bands by the continuous bandwidth division manner, and then the sub-band 0, the sub-band 1, and the sub-band 2 , the sub-band 3, the sub-band 4, the sub-band 5, the sub-band 6, the sub-band 7, the sub-band 8, and the sub-band 9 define four second sub-bands, for example, the four second sub-bands are A sub-bands, a B subband, a C subband, and a D subband, wherein the A subband includes a subband 0, a subband 1 and a subband 2, the B subband includes a subband 3, a subband 4, and a subband 5, and the C subband includes
  • the corresponding channel characteristic parameters such as angle expansion, frequency correlation, and spatial correlation, are different, so that the selected values of the pre-selected M may be the same or different, so that the base station is based on the value of the pre-selected M.
  • the value of the M may be the value of the pre-selected M, or may be greater or smaller than the value of the pre-selected M, such that the values of the M may be the same or different.
  • the values of M corresponding to different UEs may be the same or different, and the values of M corresponding to at least two UEs may be the same or different.
  • the value of the pre-selected M selected by the first UE is 4, and the base station determines according to 4.
  • the value of M is 3; the value of the preselected M selected by the second UE is also 4, and the base station determines, according to 4, that the value of M corresponding to the second UE may be 3 or 4, so that The values of M corresponding to the first UE and the second UE may be the same or different.
  • system transmission bandwidths corresponding to different UEs may be the same or different, and the system transmission bandwidth may be divided into N first sub-bands by a uniform halving method or a non-division manner, so that different determinities may be determined.
  • the value of the N corresponding to the UE may be the same or different, and the number of the second sub-bands corresponding to the different UEs may be the same or different.
  • the Each of the M second sub-bands corresponding to the two UEs includes the number of the first sub-bands that are different; and when the two values of the two UEs are the same, and the M values are the same, the Each of the M second sub-bands corresponding to the two UEs may include the same number of the first sub-bands, such that each of the M second sub-bands corresponding to at least two UEs The second sub-band includes the number of first sub-bands that are different or the same.
  • step S103 is performed, in which the UE feeds back the first PMI corresponding to each second sub-band to the base station, and feeds back the second PMI corresponding to each first sub-band to the base station.
  • the UE determines, by using step S103, a first PMI corresponding to each of the M second sub-bands, and determining each of the N first sub-bands. After the second PMI corresponding to the subband, the first PMI corresponding to each second subband is fed back to the base station, and the second PMI corresponding to each first subband is fed back to the base station.
  • the first PMI and the second PMI have different time domains or frequency domain granularity, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband. .
  • the precoding matrix corresponding to subband 0 is W ⁇
  • the precoding matrix corresponding to subband 1 is W 2 ⁇ 2 and the precoding matrix corresponding to subband 2 is
  • the precoding corresponding to subband 3 is The matrix is W 2 ⁇ 3
  • the precoding matrix corresponding to subband 4 is W 2 H U and the precoding matrix corresponding to subband 5 is W 2 ( 23 )
  • the precoding matrix corresponding to subband 6 is W 2 (corresponding to subband 7)
  • the precoding matrix is W 2
  • the precoding matrix corresponding to the subband 8 is the precoding matrix corresponding to the subband 9 is w ⁇ .
  • the ii corresponding to the subband 0, the subband 1 and the subband 2 is 4, that is, the first corresponding to the subband A is represented.
  • the PMI is 4, and it is determined that the sub-band 3, the sub-band 4, and the sub-band 5 correspond to ii of 7, that is, the first PMI corresponding to the B sub-band is 7, and the sub-band 6 and the sub-band 7 correspond to ii of 9, which is to characterize C.
  • the first PMI corresponding to the band is 9, and the ii corresponding to the sub-band 8 and the sub-band 9 is 11, that is, the first PMI corresponding to the D sub-band is 11.
  • the first PMI corresponding to the A subband is 4, the first PMI corresponding to the B subband is 7, the first PMI corresponding to the C subband is 9, and the first PMI corresponding to the D subband is 11 for feedback.
  • the second PMI corresponding to subband 0 is 0, the second PMI corresponding to subband 1 is 2, the second PMI corresponding to subband 2 is 9, and the second PMI corresponding to subband 3 is 3, and subband 4 corresponds to The second PMI is 5, the second PMI corresponding to subband 5 is 11, the second PMI corresponding to subband 7 is 3, and the second PMI corresponding to subband 8 is 3. , and the second PMI corresponding to the sub-band 9 is 10 for feedback.
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the Said base station.
  • an encoding method such as joint coding or differential coding
  • the UE may send the first PMI and the second PMI to the base station by using a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • the number of determination is also ⁇ to M, with the UE and preclude the use of Determining, in the same manner, the M second sub-bands from the N first sub-bands, the first corresponding to the first second sub-band, and the second ⁇ corresponding to the second second sub-band Analogy, until the Nth second sub-band corresponds
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column replacement.
  • the technical solution of the embodiment of the present application can be applied to a multiple-input multiple-output (MIM0) wireless system.
  • the UE sends a PMI to the base station, where the PMI may be a specific value.
  • the PMI sent by the UE to the base station is 20, it is determined that the precoding matrix is an encoding matrix with a label of 20.
  • the technical solution of the present application is to select a precoding matrix from the codebook based on the received reference signal sent by the base station, and send a precoding matrix indicating PMI corresponding to the precoding matrix to the a base station, wherein the M second subbands are determined from the N first subbands, and a first PMI is fed back for each of the second subbands, so that the plurality of first PMIs are fed back to the base station, and one
  • the first PMI corresponds to a beam phase change range, so that when the beam phase changes greatly, the beam phase change of the entire bandwidth can be covered by multiple first precoding matrices, and in a scenario where the beam phase changes little,
  • the beam quantization granularity can be improved by the plurality of first precoding matrices, thereby matching the codebook with the beam phase scene, so that the system performance is improved.
  • each of the first PMIs corresponds to a part of the system transmission bandwidth, and each part of the system transmission bandwidth has a bandwidth Corresponding first PMI, and M is an integer not less than 2, such that the beam phase variation of the entire system transmission bandwidth is covered by the plurality of first PMIs, thereby reducing system performance loss; and since each first PMI only corresponds to the A portion of the system's transmission bandwidth, which in turn results in improved quantized granularity accuracy of the beam vector.
  • a third embodiment of the present invention provides a feedback method for precoding matrix indication. As shown in FIG. 1, the specific processing procedure of the method is as follows:
  • Step S101 The UE receives a reference signal sent by the base station.
  • Step S102 The UE selects, according to the reference signal, a precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook, where the codebook at least includes Two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, wherein each of the N first subbands corresponds to a second PMI. Each of the M second sub-bands corresponds to a first PMI, and the M second The subband is determined from the N first subbands, and at least one of the M second subbands includes at least two first subbands, N and M are not less than 2 Positive integer
  • Step S103 The UE feeds back a first PMI corresponding to each second sub-band to the base station, and feeds back a second PMI corresponding to each first sub-band to the base station.
  • step S101 the UE receives the reference signal sent by the base station.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the UE may further receive the RRC signaling sent by the base station, and acquire the reference signal based on the RRC signaling.
  • step S102 is performed, in which the UE selects a precoding matrix from the codebook for each first subband of the N first subbands in the system transmission bandwidth based on the reference signal.
  • the codebook includes at least two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, where each of the N first subbands a sub-band corresponding to a second PMI, each of the M second sub-bands corresponding to a first PMI, the M second sub-bands being determined from the N first sub-bands And at least one second sub-band of the M second sub-bands includes at least two first sub-bands, and N and M are positive integers not less than 2.
  • the UE after receiving the reference signal, the UE selects a pre-selection from the codebook for each first sub-band of the N first sub-bands based on the reference signal.
  • An encoding matrix, each of the precoding matrices in the codebook being represented by at least a first PMI and a second PMI, wherein the system transmission bandwidth is a system transmission bandwidth of a carrier configured for the UE for channel measurement,
  • the N first subbands in the system transmission bandwidth are determined according to a definition in a protocol between the UE and the base station.
  • the N first sub-bands are all sub-bands or partial sub-bands in the system transmission bandwidth, and the UE and the base station determine that the same N pieces are obtained according to the same manner.
  • a sub-band wherein each of the first sub-bands may have the same or different bandwidths.
  • the UE may divide the system transmission bandwidth into N first sub-bands by means of a uniform halving method or a non-divided manner. .
  • the N first subbands are also needed. Determining the M second sub-bands, wherein all the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one The second sub-band is included, wherein, since each of the M second sub-bands corresponds to a first PMI, the second sub-band included in the at least two first sub-bands is included All first sub-bands correspond to the same first PMI.
  • the M first sub-bands correspond to the M first PMIs, such that each of the first PMIs corresponds to a part of the system transmission bandwidth, and each part of the system transmission bandwidth has a corresponding bandwidth.
  • a PMI such that the M first PMIs cover the beam phase variation of the transmission bandwidth of the system, reducing system performance loss; and because each first PMI corresponds to only a part of the transmission bandwidth of the system, thereby making the quantized granularity of the beam vector Accuracy is improved.
  • the first PMI corresponding to at least two of the M second sub-bands is different.
  • the UE when determining the M second subbands from the N first subbands, the UE first determines a value of the M, and according to the value of the M, from the N Determining, in a subband, the M second subbands, where the value of the M is configured by the base station, that is, the value indicating the M is determined by using the base station configuration manner, and the base station is configured by The value of the M determined by the configuration of the base station is sent to the UE, so that the UE receives the value of the M, and then determines from the N first subbands according to the value of the M.
  • the M second sub-bands when determining the M second subbands from the N first subbands, the UE first determines a value of the M, and according to the value of the M, from the N Determining, in a subband, the M second subbands, where the value of the M is configured by the base station, that is, the value indicating the M is determined by using the base station configuration manner, and
  • the base station may directly set the value of the M, or determine the value of the M according to the transmission bandwidth of the system.
  • the value of the M set by the base station is, for example, 3, 4, and 5, and then the base station sends the value of the M to the UE, so that the UE receives the value of the M, and then Determining the M second sub-bands from the N first sub-bands according to the value of the M.
  • the base station determines the value of the M according to the system transmission bandwidth, for example, when the system transmission bandwidth is not greater than 10 MHz, the base station sets the value of the M to 3, 4, 5, and the like.
  • the base station sets the value of the M to 4, 5, 6 and the like, and then the base station sends the value of the M to the UE, so that the The UE receives the value of the M, and determines the M second sub-bands from the N first sub-bands according to the value of the M.
  • the base station determines that the value of the M is 4 according to the system transmission bandwidth, and then feeds back the value of the M to the UE, so that the UE receives the The value of the M fed back by the base station.
  • the UE may divide the N first sub-bands into the M by using a continuous bandwidth division manner or a discontinuous bandwidth division manner.
  • the second sub-bands when divided in the continuous bandwidth division manner, the frequencies corresponding to the adjacent two first sub-bands in each of the second sub-bands are continuous; and are divided by the discontinuous bandwidth
  • the mode division at least one of the adjacent two first sub-bands in each of the second sub-bands has a discontinuity in frequency.
  • the UE can receive the value of the M configured by the base station, determining, by the determining, the determining manners of the M second sub-bands from the N first sub-bands, the determining
  • the method is, for example, a continuous bandwidth division manner or a discontinuous bandwidth division manner; the UE may further determine, when receiving the value of the M, the M second second subbands from the N first subbands.
  • the determination manner is not specifically limited in the present application.
  • Sub-band 10, sub-band 11, sub-band 12, sub-band 13, sub-band 14, sub-band 15, sub-band 16, sub-band 17, sub-band 18 and sub-band 19 define four second sub-bands, for example
  • the four second sub-bands are an A1 sub-band, a B1 sub-band, a C1 sub-band, and a D1 sub-band, wherein the A1 sub-band includes a sub-band 10, a sub-band 12, and a sub-band 14,
  • the Bl subband includes a subband 11, a subband 13 and a
  • the value of the M is configured by the base station, different UEs are in different environments, and corresponding channel characteristic parameters, such as angle extension, frequency correlation, and spatial correlation, are different, so that the value of the M configured by the base station is different.
  • the values of M corresponding to different UEs may be the same or different, and the values of M corresponding to at least two UEs may be the same or different.
  • system transmission bandwidths corresponding to different UEs may be the same or different, and the system transmission bandwidth may be divided into N first sub-bands by a uniform halving method or a non-division manner, so that different determinities may be determined.
  • the value of the N corresponding to the UE may be the same or different, and the number of the second sub-bands corresponding to the different UEs may be the same or different.
  • the Each of the M second sub-bands corresponding to the two UEs includes the number of the first sub-bands that are different; and when the two values of the two UEs are the same, and the M values are the same, the Each of the M second sub-bands corresponding to the two UEs may include the same number of the first sub-bands, such that each of the M second sub-bands corresponding to at least two UEs The second sub-band includes the number of first sub-bands that are different or the same.
  • step S103 is performed, in which the UE feeds back the first PMI corresponding to each second sub-band to the base station, and feeds back the second PMI corresponding to each first sub-band to the base station.
  • the UE determines, by using step S103, a first PMI corresponding to each of the M second sub-bands, and determining each of the N first sub-bands. After the second PMI corresponding to the subband, the first PMI corresponding to each second subband is fed back to the base station, and the second PMI corresponding to each first subband is fed back to the base station.
  • the first PMI and the second PMI have different time domains or frequency domain granularity, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband.
  • the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the Said base station.
  • the UE may send the first PMI and the second PMI to the base station by using a UCCH or a PUSCH.
  • the number of the first PMI that the base station can feed back according to the UE is M, determining that the number of the 1 ⁇ is also M, and using the same as the UE.
  • the method determines the M second sub-bands from the N first sub-bands, the first one corresponding to the first second sub-band, the second one corresponding to the second second sub-band, and so on, Until the Nth second sub-band corresponds to ⁇ ( 3 ⁇ 4 ).
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column permutation.
  • the technical solution of the embodiment of the present application can be applied to a multiple input multiple output MIMO wireless system.
  • the UE sends a PMI to the base station, where the PMI may be a specific value.
  • the PMI sent by the UE to the base station is 20, it is determined that the precoding matrix is an encoding matrix with a label of 20.
  • the UE selects a precoding matrix from the codebook for each first subband of the N first subbands in the system transmission bandwidth according to the received reference signal sent by the base station. And feeding back a first PMI corresponding to each second sub-band to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station can receive the Determining the value of the M by a quantity of PMI, and determining, according to the value of the M, the M second sub-bands from the N first sub-bands in the same manner as the UE, Then, according to the first PMI and the second PMI fed back by the UE, obtaining a precoding matrix corresponding to each first subband, according to the obtained encoding manner corresponding to the precoding matrix corresponding to each first subband To transfer data.
  • the technical solution of the present application is to select a precoding matrix from the codebook based on the received reference signal sent by the base station, and send a precoding matrix indicating PMI corresponding to the precoding matrix to the a base station, wherein the M second subbands are determined from the N first subbands, and a first PMI is fed back for each of the second subbands, so that the plurality of first PMIs are fed back to the base station, and one
  • the first PMI corresponds to a beam phase change range, so that when the beam phase changes greatly, the beam phase change of the entire bandwidth can be covered by multiple first precoding matrices, and in a scenario where the beam phase changes little,
  • the beam quantization granularity can be improved by the plurality of first precoding matrices, thereby matching the codebook with the beam phase scene, so that the system performance is improved.
  • each of the first PMIs corresponds to a part of the system transmission bandwidth, and each part of the system transmission bandwidth has a bandwidth Corresponding first PMI, and M is an integer not less than 2, such that the beam phase variation of the entire system transmission bandwidth is covered by the plurality of first PMIs, thereby reducing system performance loss; and since each first PMI only corresponds to the A portion of the system's transmission bandwidth, which in turn results in improved quantized granularity accuracy of the beam vector.
  • a fourth embodiment of the present invention provides a feedback method for precoding matrix indication. As shown in FIG. 1, the specific processing procedure of the method is as follows:
  • Step S101 The UE receives a reference signal sent by the base station.
  • Step S102 The UE selects, according to the reference signal, a precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook, where the codebook at least includes Two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, wherein each of the N first subbands corresponds to a second PMI.
  • Each of the M second sub-bands corresponds to a first PMI, the M second sub-bands are determined from the N first sub-bands, and the M second At least one second sub-band in the sub-band includes at least two first sub-bands, N and M are positive integers not less than 2;
  • Step S103 The UE feeds back a first PMI corresponding to each second sub-band to the base station, and feeds back a second PMI corresponding to each first sub-band to the base station.
  • step S101 the UE receives the reference signal sent by the base station.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the UE may further receive the RRC signaling sent by the base station, and acquire the reference signal based on the RRC signaling.
  • step S102 is performed, in which the UE selects a precoding matrix from the codebook for each first subband of the N first subbands in the system transmission bandwidth based on the reference signal.
  • the codebook includes at least two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, where each of the N first subbands a sub-band corresponding to a second PMI, each of the M second sub-bands corresponding to a first PMI, the M second sub-bands being determined from the N first sub-bands And at least one second sub-band of the M second sub-bands includes at least two first sub-bands, and N and M are positive integers not less than 2.
  • the UE after receiving the reference signal, the UE selects a pre-selection from the codebook for each first sub-band of the N first sub-bands based on the reference signal.
  • An encoding matrix, each of the precoding matrices in the codebook being represented by at least a first PMI and a second PMI, wherein the system transmission bandwidth is a system transmission bandwidth of a carrier configured for the UE for channel measurement,
  • the N first subbands in the system transmission bandwidth are determined according to a definition in a protocol between the UE and the base station.
  • the N first subbands are also needed. Determining the M second sub-bands, wherein all the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one The second sub-band is included, wherein, since each of the M second sub-bands corresponds to a first PMI, the second sub-band included in the at least two first sub-bands is included All first sub-bands correspond to the same first PMI.
  • the M first sub-bands correspond to the M first PMIs, such that each of the first PMIs corresponds to a part of the system transmission bandwidth, and each part of the system transmission bandwidth has a corresponding bandwidth.
  • a PMI such that the M first PMIs cover the beam phase variation of the transmission bandwidth of the system, reducing system performance loss; and because each first PMI corresponds to only a part of the transmission bandwidth of the system, thereby making the quantized granularity of the beam vector Accuracy is improved.
  • the first PMI corresponding to at least two of the M second sub-bands is different.
  • the UE when determining the M second subbands from the N first subbands, the UE first determines a value of the M, and according to the value of the M, from the N Determining the M second sub-bands in a sub-band, wherein the value of the M is determined in a predefined manner, when determining the value of the M in the predefined manner, the UE and The base station may preset the value of the M to be the same value.
  • the value of the M may be set to a value of 3, 4, or 5; and the UE may further set the bandwidth according to the system transmission bandwidth.
  • the value of M when the transmission bandwidth of the system is not more than 10 MHz, the value of the M is, for example, 2, 3, 4, etc., when the transmission bandwidth of the system is greater than the 10 MHz, the value of the M is, for example, 3, 4, 5 equivalent.
  • the predefined manner is that the number of the first sub-bands included in each second sub-band is the same, so that the UE determines the location according to the predefined manner.
  • the fifth second sub-band includes a sub-band 8 and a sub-band 9.
  • the UE may divide the N first sub-bands into a continuous bandwidth partitioning manner or a discontinuous bandwidth partitioning manner.
  • the M second sub-bands when divided in the continuous bandwidth division manner, the frequencies corresponding to the adjacent two first sub-bands in each of the second sub-bands are continuous;
  • the bandwidth division mode is divided, at least one of the adjacent two first sub-bands in each of the second sub-bands has a frequency discontinuity.
  • Determining a determination manner of the M second sub-bands from the N first sub-bands where the determining manner is, for example, a continuous bandwidth division manner or a discontinuous bandwidth division manner;
  • the determination manner of determining the M second sub-bands from the N first sub-bands is determined by the predefined manner determining the value of the M, which is not specifically limited in the present application.
  • the value of the M is determined by the predefined manner, different UEs are in different environments, and corresponding channel feature parameters, such as angle extension, frequency correlation, and spatial correlation, are different.
  • the values of M corresponding to the UE may be the same or different, and the values of M corresponding to at least two UEs may be the same or different.
  • system transmission bandwidths corresponding to different UEs may be the same or different, and the system transmission bandwidth may be divided into N first sub-bands by a uniform halving method or a non-division manner, so that different determinities may be determined.
  • the value of the N corresponding to the UE may be the same or different, and the number of the second sub-bands corresponding to the different UEs may be the same or different.
  • the Each of the M second sub-bands corresponding to the two UEs includes the number of the first sub-bands that are different; and when the two values of the two UEs are the same, and the M values are the same, the Each of the M second sub-bands corresponding to the two UEs may include the same number of the first sub-bands, such that each of the M second sub-bands corresponding to at least two UEs The second sub-band includes the number of first sub-bands that are different or the same.
  • step S103 is performed, in which the UE feeds back the first PMI corresponding to each second sub-band to the base station, and feeds back the second PMI corresponding to each first sub-band to the base station.
  • the UE determines, by using step S103, a first PMI corresponding to each of the M second sub-bands, and determining each of the N first sub-bands. After the second PMI corresponding to the subband, the first PMI corresponding to each second subband is fed back to the base station, and the second PMI corresponding to each first subband is fed back to the base station.
  • the first PMI and the second PMI have different time domains or frequency domains.
  • the granularity for example, the first PMI corresponds to the entire frequency bandwidth, and the second PMI corresponds to the entire frequency band or one sub-band.
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the Said base station.
  • an encoding method such as joint coding or differential coding
  • the UE may send the first PMI and the second PMI to the base station by using a UCCH or a PUSCH.
  • the number of the first PMI that the base station can feed back according to the UE is M, determining that the number of the 1 ⁇ is also M, and using the same as the UE.
  • the method determines the M second sub-bands from the N first sub-bands, the first one corresponding to the first second sub-band, the second one corresponding to the second second sub-band, and so on, Until the Nth second sub-band corresponds
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column permutation.
  • the technical solution of the embodiment of the present application can be applied to a multiple input multiple output MIMO wireless system.
  • the technical solution of the present application is to select a precoding matrix from the codebook based on the received reference signal sent by the base station, and send a precoding matrix indicating PMI corresponding to the precoding matrix to the a base station, wherein the M second subbands are determined from the N first subbands, and a first PMI is fed back for each of the second subbands, so that the plurality of first PMIs are fed back to the base station, and one
  • the first PMI corresponds to a beam phase change range, so that when the beam phase changes greatly, the beam phase change of the entire bandwidth can be covered by multiple first precoding matrices, and in a scenario where the beam phase changes little,
  • the beam quantization granularity can be improved by the plurality of first precoding matrices, thereby matching the codebook with the beam phase scene, so that the system performance is improved.
  • each of the first PMIs corresponds to a part of the system transmission bandwidth, and each part of the system transmission bandwidth has a bandwidth Corresponding first PMI, and M is an integer not less than 2, such that multiple A PMI covers the beam phase variation of the entire system transmission bandwidth, reducing system performance loss; and since each first PMI corresponds to only a part of the system transmission bandwidth, the quantized granularity precision of the beam vector is improved.
  • a fifth embodiment of the present invention provides a feedback method for precoding matrix indication. As shown in FIG. 1, the specific processing procedure of the method is as follows:
  • Step S101 The UE receives a reference signal sent by the base station.
  • Step S102 The UE selects, according to the reference signal, a precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook, where the codebook at least includes Two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, wherein each of the N first subbands corresponds to a second PMI.
  • Each of the M second sub-bands corresponds to a first PMI, the M second sub-bands are determined from the N first sub-bands, and the M second At least one second sub-band in the sub-band includes at least two first sub-bands, N and M are positive integers not less than 2;
  • Step S103 The UE feeds back a first PMI corresponding to each second sub-band to the base station, and feeds back a second PMI corresponding to each first sub-band to the base station.
  • step S101 the UE receives the reference signal sent by the base station.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the UE may further receive the RRC signaling sent by the base station, and acquire the reference signal based on the RRC signaling.
  • step S102 is performed, in which the UE selects a precoding matrix from the codebook for each first subband of the N first subbands in the system transmission bandwidth based on the reference signal.
  • the codebook includes at least two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, where each of the N first subbands The first sub-bands correspond to a second PMI, and each of the M second sub-bands corresponds to a first PMI, and the M second sub-bands are from the N first sub-bands Determining that at least one of the M second sub-bands comprises at least two first sub-bands, N and M are positive integers not less than 2.
  • the UE after receiving the reference signal, the UE selects a pre-selection from the codebook for each first sub-band of the N first sub-bands based on the reference signal.
  • An encoding matrix, each of the precoding matrices in the codebook being represented by at least a first PMI and a second PMI, wherein the system transmission bandwidth is a system transmission bandwidth of a carrier configured for the UE for channel measurement,
  • the N first subbands in the system transmission bandwidth are determined according to a definition in a protocol between the UE and the base station.
  • the N first subbands are also needed. Determining the M second sub-bands, wherein all the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one The second sub-band is included, wherein, since each of the M second sub-bands corresponds to a first PMI, the second sub-band included in the at least two first sub-bands is included All first sub-bands correspond to the same first PMI.
  • the M first sub-bands correspond to the M first PMIs, such that each of the first PMIs corresponds to a part of the system transmission bandwidth, and each part of the system transmission bandwidth has a corresponding bandwidth.
  • a PMI such that the M first PMIs cover the beam phase variation of the transmission bandwidth of the system, reducing system performance loss; and because each first PMI corresponds to only a part of the transmission bandwidth of the system, thereby making the quantized granularity of the beam vector Accuracy is improved.
  • the first PMI corresponding to at least two of the M second sub-bands is different.
  • the UE when determining the M second sub-bands from the N first sub-bands, the UE first determines a first one included in each of the M second sub-bands And determining, by the number of the first sub-bands included in each second sub-band, the M second sub-bands, where the UE is When the number of the first sub-bands included in each second sub-band is the root It is determined according to the UE configuration manner.
  • the UE may determine, according to the N first sub-bands, the second second sub-sub
  • the number of the first sub-bands is included in the band, for example, the number of the first sub-bands included in each of the M second sub-bands may be the same value, or the M numbers may be used.
  • Each of the second sub-bands includes a first sub-band having a different number or a portion of the same value.
  • each second sub-band includes the number of the first sub-band
  • the UE may adopt a continuous bandwidth division manner or a discontinuous bandwidth division manner, thereby
  • the N first sub-bands are divided into the M second sub-bands, and when divided by the continuous bandwidth division manner, the frequency corresponding to the adjacent two first sub-bands in each of the second sub-bands is Continuously; when divided in the discontinuous bandwidth partition manner, at least one of the adjacent two first sub-bands in each of the second sub-bands has a frequency discontinuity.
  • the UE is determined according to subband 0, subband 1, subband 2, subband 3, subband 4, subband 5, subband 6, subband 7, subband 8, and subband 9.
  • the number of the first sub-bands included in each of the M second sub-bands is the same value, the number of the first sub-bands included in each second sub-band may be determined.
  • the number of the first sub-bands included in each second sub-band may be 2 or 5, and when the number of the first sub-bands included in each second sub-band is 2, if the number of the first sub-bands is divided by the continuous bandwidth division , the N first sub-bands are divided into 5 second sub-bands, wherein the first second sub-band of the 5 second sub-bands includes sub-band 0 and sub-band 1, and the second The second sub-band comprises sub-band 2 and sub-band 3, the third second sub-band comprises sub-band 4 and sub-band 5, the fourth second sub-band comprises sub-band 6 and sub-band 7, and a fifth second sub-band The sub-band 8 and the sub-band 9 are included, wherein a frequency corresponding to two adjacent first sub-bands in each of the second sub-bands is continuous.
  • each second sub-band when determining, according to the UE configuration manner, each second sub-band includes the number of the first sub-band, determining, according to the N first sub-bands, each second sub-band includes the first The number of the sub-bands, the environment of the different UEs is different, and the value of the corresponding N may be the same or different, so that each second sub-band determined by the UE configuration mode includes the number of the first sub-bands, The same or different, further determining that each of the M second sub-bands corresponding to different UEs includes the first one The number of subbands may be the same or different, and each of the M second subbands corresponding to at least two UEs includes a different number of first subbands.
  • the method when the UE selects one precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook based on the reference signal, the method further The method includes: reporting, by the UE, the number of the first sub-bands included in each of the M second sub-bands to the base station.
  • the UE reports the number of the first sub-bands included in each second sub-band to the base station, to Enabling the base station to receive the number of first sub-bands included in each second sub-band, and determining the M second sub-seconds from the N first sub-bands in the same manner as the UE band.
  • step S103 is performed, in which the UE feeds back the first PMI corresponding to each second sub-band to the base station, and feeds back the second PMI corresponding to each first sub-band to the base station.
  • the UE determines, by using step S103, a first PMI corresponding to each of the M second sub-bands, and determining each of the N first sub-bands. After the second PMI corresponding to the subband, the first PMI corresponding to each second subband is fed back to the base station, and the second PMI corresponding to each first subband is fed back to the base station.
  • the first PMI and the second PMI have different time domains or frequency domain granularity, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband. .
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the Said base station.
  • an encoding method such as joint coding or differential coding
  • the UE may send the first PMI and the second PMI to the base station by using a UCCH or a PUSCH.
  • the base station can be configured according to the The number of the first PMI fed back by the UE is M, determining that the number of the 1 ⁇ is also M, and determining the M second children from the N first subbands in the same manner as the UE The first one corresponds to the first second sub-band, the second one corresponds to the second second sub-band, and so on, until the Nth second sub-band corresponds to ⁇ (n .
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column permutation. Further, the technical solution in the embodiment of the present application can be applied to a multiple input multiple output MIMO radio system.
  • the UE may also report the number of the first sub-bands included in each of the M second sub-bands to the base station, so that the base station receives the first PMI and the Before the two PMIs, the M second sub-bands are determined from the N first sub-bands in the same manner as the UE, so that the first PMI and the In the case of the two PMIs, the precoding matrix corresponding to each of the first subbands can be obtained more quickly, so that the work efficiency is improved.
  • the method when the UE selects a precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook based on the reference signal, the method The method further includes: reporting, by the UE, the number of the first sub-bands included in each of the M second sub-bands to the base station.
  • the UE may use the M second The number of the first sub-bands included in each of the second sub-bands of the sub-band is reported to the base station.
  • the UE selects, according to the received reference signal sent by the base station, a precoding matrix from a codebook for each first subband of N first subbands in a system transmission bandwidth, where the UE The number of the first sub-bands included in each of the M second sub-bands may be reported to the base station, so that the base station receives the first PMI and the second feedback from the UE.
  • the M second children are determined from the N first subbands in the same manner as the UE
  • the precoding matrix corresponding to each of the first subbands can be acquired more quickly, so that work efficiency is improved.
  • the technical solution of the present application is to select a precoding matrix from the codebook based on the received reference signal sent by the base station, and send a precoding matrix indicating PMI corresponding to the precoding matrix to the a base station, wherein the M second subbands are determined from the N first subbands, and a first PMI is fed back for each of the second subbands, so that the plurality of first PMIs are fed back to the base station, and one
  • the first PMI corresponds to a beam phase change range, so that when the beam phase changes greatly, the beam phase change of the entire bandwidth can be covered by multiple first precoding matrices, and in a scenario where the beam phase changes little,
  • the beam quantization granularity can be improved by the plurality of first precoding matrices, thereby matching the codebook with the beam phase scene, so that the system performance is improved.
  • each of the first PMIs corresponds to a part of the system transmission bandwidth, and each part of the system transmission bandwidth has a bandwidth Corresponding first PMI, and M is an integer not less than 2, such that the beam phase variation of the entire system transmission bandwidth is covered by the plurality of first PMIs, thereby reducing system performance loss; and since each first PMI only corresponds to the A portion of the system's transmission bandwidth, which in turn results in improved quantized granularity accuracy of the beam vector.
  • a sixth embodiment of the present invention provides a feedback method for precoding matrix indication. As shown in FIG. 1, the specific processing procedure of the method is as follows:
  • Step S101 The UE receives a reference signal sent by the base station.
  • Step S102 The UE selects, according to the reference signal, a precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook, where the codebook at least includes Two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, wherein each of the N first subbands corresponds to a second PMI Each of the M second sub-bands corresponds to a first PMI, the M second sub-bands are determined from the N first sub-bands, and the M second At least one second sub-band in the sub-band includes at least two first sub-bands, N and M are positive integers not less than 2;
  • Step S103 The UE feeds back a first PMI corresponding to each second sub-band to the base station, and feeds back a second PMI corresponding to each first sub-band to the base station.
  • step S101 the UE receives the reference signal sent by the base station.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the UE may further receive the RRC signaling sent by the base station, and acquire the reference signal based on the RRC signaling.
  • step S102 is performed, in which the UE selects a precoding matrix from the codebook for each first subband of the N first subbands in the system transmission bandwidth based on the reference signal.
  • the codebook includes at least two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, where each of the N first subbands a sub-band corresponding to a second PMI, each of the M second sub-bands corresponding to a first PMI, the M second sub-bands being determined from the N first sub-bands And at least one second sub-band of the M second sub-bands includes at least two first sub-bands, and N and M are positive integers not less than 2.
  • the UE after receiving the reference signal, the UE selects a pre-selection from the codebook for each first sub-band of the N first sub-bands based on the reference signal.
  • An encoding matrix, each of the precoding matrices in the codebook being represented by at least a first PMI and a second PMI, wherein the system transmission bandwidth is a system transmission bandwidth of a carrier configured for the UE for channel measurement,
  • the N first subbands in the system transmission bandwidth are determined according to a definition in a protocol between the UE and the base station.
  • the N first subbands are also needed. Determining the M second sub-bands, wherein all the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one The second sub-band is included, Each of the M second sub-bands corresponds to a first PMI, such that all first sub-bands included in the second sub-band including at least two first sub-bands correspond to the same first A PMI.
  • the M first sub-bands correspond to the M first PMIs, such that each of the first PMIs corresponds to a part of the system transmission bandwidth, and each part of the system transmission bandwidth has a corresponding bandwidth.
  • a PMI such that the M first PMIs cover the beam phase variation of the transmission bandwidth of the system, reducing system performance loss; and because each first PMI corresponds to only a part of the transmission bandwidth of the system, thereby making the quantized granularity of the beam vector Accuracy is improved.
  • the first PMI corresponding to at least two of the M second sub-bands is different.
  • the UE when determining the M second sub-bands from the N first sub-bands, the UE first determines a first one included in each of the M second sub-bands And determining, by the number of the first sub-bands included in each second sub-band, the M second sub-bands, where the UE is The number of first sub-bands included in each second sub-band is determined according to the UE feedback manner.
  • the UE when the number of the first sub-bands included in each of the M second sub-bands is determined according to the UE feedback manner, the UE will pre-select each The number of the first sub-bands included in the second sub-band is reported to the base station; the UE receives the number of first sub-bands included in each second sub-band fed back by the base station, and each second sub-sub The number of first subbands included in the band is determined by the base station based on the number of first subbands included in each of the preselected second subbands.
  • Each second sub-band includes the same number of first sub-bands as the number of first sub-bands included in each of the pre-selected second sub-bands.
  • the UE determines, according to the system transmission bandwidth that is 10 MHz, that the second sub-band of the pre-selected M second sub-bands includes the number of the first sub-bands.
  • the base station may determine, according to the received 3, 3, 2, and 2, for example, that the number of the first sub-bands in each of the M second sub-bands may be, for example, 3, 3, 2 and 2, 3, 3, 3 and 1, 4, 2, 2, and so on, the base station further feeds back the determined number of the first sub-bands to the UE, so that the UE can receive each sent by the base station.
  • the second sub-bands contain the number of first sub-bands.
  • the UE may use the continuous bandwidth division manner or the discontinuous bandwidth division manner, thereby
  • the N first sub-bands are divided into the M second sub-bands, and when divided by the continuous bandwidth division manner, the frequency corresponding to the adjacent two first sub-bands in each of the second sub-bands is Continuously; when divided in the discontinuous bandwidth partition manner, at least one of the adjacent two first sub-bands in each of the second sub-bands has a frequency discontinuity.
  • the UE determines, according to the system transmission bandwidth that is 10 MHz, that the second sub-band of the pre-selected M second sub-bands includes the number of the first sub-bands. 3, 2, and 2, and transmitting 3, 3, 2, and 2 to the base station, the base station determining, based on 3, 3, 2, and 2, that each second sub-band includes the number of the first sub-band, for example, 3, 3, 3, and 1, and then send 3, 3, 3, and 1 to the UE, and the UE divides the subband 0 and the subband 1 in a continuous bandwidth manner based on 3, 3, 3, and 1.
  • the first second sub-band comprises sub-band 0, sub-band 1 and sub-band 2
  • the second second sub-band comprises sub-band sub-band 3, sub-band 4 and sub-band 5
  • the third second sub-band comprises strip 6
  • the fourth second sub-band includes sub-band 9, wherein, except for the first second sub-band, there is only one first sub-band, and the other three second sub-bands
  • the frequency corresponding to two adjacent first sub-bands in each of the second sub-bands is continuous.
  • each second sub-band includes the number of the first sub-band
  • different UEs are in different environments, and corresponding channel feature parameters such as angle expansion and frequency correlation are used.
  • each of the selected second sub-bands of the pre-selection may include the same or different numbers of the first sub-bands, such that the base station includes each second sub-band according to the pre-selection
  • the number of first sub-bands determines that each second sub-band includes the number of first sub-bands, and each second sub-band includes the number of first sub-bands and each of the pre-selected second
  • the sub-bands include the same or different numbers of the first sub-bands, such that the number of the first sub-bands per second sub-band may also be In the same or different manner, the number of the first sub-bands in each of the M second sub-bands corresponding to different UEs may be the same or different, and the M corresponding to at least two
  • step S103 is performed, in which the UE feeds back the first PMI corresponding to each second sub-band to the base station, and feeds back the second PMI corresponding to each first sub-band to the base station.
  • the UE determines, by using step S103, a first PMI corresponding to each of the M second sub-bands, and determining each of the N first sub-bands. After the second PMI corresponding to the subband, the first PMI corresponding to each second subband is fed back to the base station, and the second PMI corresponding to each first subband is fed back to the base station.
  • the first PMI and the second PMI have different time domains or frequency domain granularity, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband. .
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the Said base station.
  • an encoding method such as joint coding or differential coding
  • the UE may send the first PMI and the second PMI to the base station by using a UCCH or a PUSCH.
  • the number of determination is also ⁇ to M, with the UE and preclude the use of Determining, in the same manner, the M second sub-bands from the N first sub-bands, the first corresponding to the first second sub-band, and the second ⁇ corresponding to the second second sub-band By analogy, until the Nth second subband corresponds to ⁇ ( 3 ⁇ 4 ).
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column replacement.
  • the technical solution of the embodiment of the present application can be applied to a multiple input multiple output MIMO wireless system.
  • the technical solution of the present application is to select a precoding matrix from the codebook based on the received reference signal sent by the base station, and send a precoding matrix indicating PMI corresponding to the precoding matrix to the a base station, wherein the M second subbands are determined from the N first subbands, and a first PMI is fed back for each of the second subbands, so that the plurality of first PMIs are fed back to the base station, and one
  • the first PMI corresponds to a beam phase change range, so that when the beam phase changes greatly, the beam phase change of the entire bandwidth can be covered by multiple first precoding matrices, and in a scenario where the beam phase changes little,
  • the beam quantization granularity can be improved by the plurality of first precoding matrices, thereby matching the
  • a seventh embodiment of the present invention provides a feedback method for precoding matrix indication. As shown in FIG. 1, the specific processing procedure of the method is as follows:
  • Step S101 The UE receives a reference signal sent by the base station.
  • Step S102 The UE selects, according to the reference signal, a precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook, where the codebook at least includes Two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, wherein each of the N first subbands corresponds to a second PMI.
  • Each of the M second sub-bands corresponds to a first PMI, the M second sub-bands are determined from the N first sub-bands, and the M second At least one second sub-band in the sub-band includes at least two first sub-bands, N and M are positive integers not less than 2;
  • Step S103 The UE feeds back a first PMI corresponding to each second sub-band to the base station, and feeds back a second PMI corresponding to each first sub-band to the base station.
  • step S101 the UE receives the reference signal sent by the base station.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the UE may further receive the sending by the base station. RRC signaling, acquiring the reference signal based on the RRC signaling.
  • step S102 is performed, in which the UE selects a precoding matrix from the codebook for each first subband of the N first subbands in the system transmission bandwidth based on the reference signal.
  • the codebook includes at least two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, where each of the N first subbands a sub-band corresponding to a second PMI, each of the M second sub-bands corresponding to a first PMI, the M second sub-bands being determined from the N first sub-bands And at least one second sub-band of the M second sub-bands includes at least two first sub-bands, and N and M are positive integers not less than 2.
  • the UE after receiving the reference signal, the UE selects a pre-selection from the codebook for each first sub-band of the N first sub-bands based on the reference signal.
  • An encoding matrix, each of the precoding matrices in the codebook being represented by at least a first PMI and a second PMI, wherein the system transmission bandwidth is a system transmission bandwidth of a carrier configured for the UE for channel measurement,
  • the N first subbands in the system transmission bandwidth are determined according to a definition in a protocol between the UE and the base station.
  • the N first subbands are also needed. Determining the M second sub-bands, wherein all the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one The second sub-band is included, wherein, since each of the M second sub-bands corresponds to a first PMI, the second sub-band included in the at least two first sub-bands is included All first sub-bands correspond to the same first PMI.
  • the M first sub-bands correspond to the M first PMIs, such that each of the first PMIs corresponds to a part of the system transmission bandwidth, and each part of the system transmission bandwidth has a corresponding bandwidth.
  • a PMI such that the M first PMIs cover the beam phase variation of the transmission bandwidth of the system, reducing system performance loss; and because each first PMI corresponds to only a part of the transmission bandwidth of the system, thereby making the quantized granularity of the beam vector Accuracy is improved.
  • the first PMI corresponding to at least two second sub-bands of the M second sub-bands Not the same.
  • the UE when determining the M second sub-bands from the N first sub-bands, the UE first determines a first one included in each of the M second sub-bands And determining, by the number of the first sub-bands included in each second sub-band, the M second sub-bands, where the UE is The number of first sub-bands included in each second sub-band is determined according to the configuration of the base station.
  • the base station may be configured according to the N a subband, configured to configure a number of first subbands included in each of the M second subbands, the base station configuring each of the M second subbands After the number of the first sub-bands included in the second sub-band, the number of the first sub-bands included in each of the M second sub-bands is fed back to the UE, so that the Determining, by the UE, the M second sub-bands from the N first sub-bands according to the number of first sub-bands included in each of the M second sub-bands.
  • the base station may determine, according to the N first sub-bands, the each second sub-sub The number of the first sub-bands is included in the band, for example, the number of the first sub-bands included in each of the M second sub-bands may be the same value, or the M numbers may be used.
  • Each of the second sub-bands includes a first sub-band having a different number or a portion of the same value.
  • the base station is determined according to subband 0, subband 1, subband 2, subband 3, subband 4, subband 5, subband 6, subband 7, subband 8, and subband 9.
  • the number of the first sub-bands included in each of the M second sub-bands is the same value, the number of the first sub-bands included in each second sub-band may be determined.
  • the number of first sub-bands included in each second sub-band may be 2 or 5.
  • the base station determines, according to the configuration manner of the base station, that each second sub-band includes the number of the first sub-band, and sends the number of the first sub-bands of each second sub-band to the UE. And causing, by the UE, each second sub-band fed back by the base station to include the number of the first sub-band, after receiving the second sub-band fed back by the base station, including the number of the first sub-band,
  • the N first sub-bands may be divided into the M pieces by a continuous bandwidth division manner or a discontinuous bandwidth division manner.
  • a second sub-band wherein the frequency corresponding to two adjacent first sub-bands in each of the second sub-bands is continuous when divided by the continuous bandwidth division manner;
  • the frequency corresponding to two adjacent first sub-bands in each of the second sub-bands is continuous when divided by the continuous bandwidth division manner;
  • the base station is determined according to subband 0, subband 1, subband 2, subband 3, subband 4, subband 5, subband 6, subband 7, subband 8, and subband 9.
  • the number of the first sub-bands included in each of the M second sub-bands is the same value, the number of the first sub-bands included in each second sub-band may be determined.
  • the number of the first sub-bands included in each second sub-band may be 2 or 5.
  • the base station will each second sub-band The number of the first sub-bands that are included is 2 is fed back to the UE, and the UE divides according to the continuous bandwidth division manner according to the number of the first sub-bands included in each second sub-band being 2, so that Dividing the N first sub-bands into five second sub-bands, wherein the first one of the five second sub-bands includes sub-band 0 and sub-band 1, second and second The sub-band includes sub-band 2 and sub-band 3, the third second sub-band includes sub-band 4 and sub-band 5, and the fourth second sub-band includes sub-band 6 and sub-band 7, and a fifth Subband contains 8 subbands and subband 9, wherein the frequency corresponding to each of a second subband adjacent two first sub-band is continuous.
  • each second sub-band when determining, according to the configuration manner of the base station, each second sub-band includes the number of the first sub-band, determining, according to the N first sub-bands, each second sub-band includes the first The number of the sub-bands is different, and the values of the corresponding Ns may be the same or different, so that each second sub-band determined by the configuration of the base station includes the number of the first sub-bands, The same or different, further determining that each of the M second sub-bands corresponding to different UEs includes the first sub-bands may be the same or different, and the M corresponding to at least two UEs Each of the second sub-bands includes a different number of first sub-bands.
  • step S103 is performed, in which the UE feeds back the first PMI corresponding to each second sub-band to the base station, and feeds back the second PMI corresponding to each first sub-band to the base station.
  • the UE determines, in step S103, each of the M second sub-bands After the first PMI corresponding to the second sub-band and the second PMI corresponding to the first sub-band of each of the N first sub-bands, the first PMI corresponding to each second sub-band is fed back to And the base station, and the second PMI corresponding to each of the first sub-bands is fed back to the base station.
  • the first PMI and the second PMI have different time domains or frequency domain granularity, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband. .
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the Said base station.
  • an encoding method such as joint coding or differential coding
  • the UE may send the first PMI and the second PMI to the base station by using a UCCH or a PUSCH.
  • the number of the first PMI that the base station can feed back according to the UE is M, determining that the number of the 1 ⁇ is also M, and using the same as the UE.
  • the method determines the M second sub-bands from the N first sub-bands, the first one corresponding to the first second sub-band, the second one corresponding to the second second sub-band, and so on, Until the Nth second sub-band corresponds
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column permutation.
  • the technical solution of the embodiment of the present application can be applied to a multiple input multiple output MIMO wireless system.
  • the technical solution of the present application is to select a precoding matrix from the codebook based on the received reference signal sent by the base station, and send a precoding matrix indicating PMI corresponding to the precoding matrix to the a base station, wherein the M second subbands are determined from the N first subbands, and a first PMI is fed back for each of the second subbands, so that the plurality of first PMIs are fed back to the base station, and one
  • the first PMI corresponds to a beam phase change range, so that when the beam phase changes greatly, the beam phase change of the entire bandwidth can be covered by multiple first precoding matrices, and in a scenario where the beam phase changes little,
  • the amount of beam can be increased by a plurality of first precoding matrices
  • the granularity which in turn causes the codebook to match the beam phase scene, improves system performance.
  • a seventh embodiment of the present invention provides a feedback method for precoding matrix indication. As shown in FIG. 1, the specific processing procedure of the method is as follows:
  • Step S101 The UE receives a reference signal sent by the base station.
  • Step S102 The UE selects, according to the reference signal, a precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook, where the codebook at least includes Two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, wherein each of the N first subbands corresponds to a second PMI.
  • Each of the M second sub-bands corresponds to a first PMI, the M second sub-bands are determined from the N first sub-bands, and the M second At least one second sub-band in the sub-band includes at least two first sub-bands, N and M are positive integers not less than 2;
  • Step S103 The UE feeds back a first PMI corresponding to each second sub-band to the base station, and feeds back a second PMI corresponding to each first sub-band to the base station.
  • step S101 the UE receives the reference signal sent by the base station.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the UE may further receive the RRC signaling sent by the base station, and acquire the reference signal based on the RRC signaling.
  • step S102 is performed, in which the UE selects a precoding matrix from the codebook for each first subband of the N first subbands in the system transmission bandwidth based on the reference signal.
  • the codebook includes at least two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating a PMI and a second PMI, where each of the N first subbands a sub-band corresponding to a second PMI, each of the M second sub-bands corresponding to a first PMI, the M second sub-bands being determined from the N first sub-bands And the M At least one second sub-band of the second sub-bands includes at least two first sub-bands, and N and M are positive integers not less than 2.
  • the UE after receiving the reference signal, the UE selects a pre-selection from the codebook for each first sub-band of the N first sub-bands based on the reference signal.
  • An encoding matrix, each of the precoding matrices in the codebook being represented by at least a first PMI and a second PMI, wherein the system transmission bandwidth is a system transmission bandwidth of a carrier configured for the UE for channel measurement,
  • the N first subbands in the system transmission bandwidth are determined according to a definition in a protocol between the UE and the base station.
  • the N first subbands are also needed. Determining the M second sub-bands, wherein all the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one The second sub-band is included, wherein, since each of the M second sub-bands corresponds to a first PMI, the second sub-band included in the at least two first sub-bands is included All first sub-bands correspond to the same first PMI.
  • the M first sub-bands correspond to the M first PMIs, such that each of the first PMIs corresponds to a part of the system transmission bandwidth, and each part of the system transmission bandwidth has a corresponding bandwidth.
  • a PMI such that the M first PMIs cover the beam phase variation of the transmission bandwidth of the system, reducing system performance loss; and because each first PMI corresponds to only a part of the transmission bandwidth of the system, thereby making the quantized granularity of the beam vector Accuracy is improved.
  • the first PMI corresponding to at least two of the M second sub-bands is different.
  • the UE when determining the M second sub-bands from the N first sub-bands, the UE first determines a first one included in each of the M second sub-bands And determining, by the number of the first sub-bands included in each second sub-band, the M second sub-bands, where the UE is The number of first sub-bands included in each second sub-band is determined according to the predefined manner.
  • the UE and the base station each use a predefined rule to configure each of the first sub-bands included in each of the M second sub-bands
  • the predefined rule may be that the number of the first sub-bands included in each second sub-band is the same, or different, or partially the same.
  • the base station and the UE may configure, according to the predefined rule, the number of first subbands included in each of the M second subbands, if
  • the predefined rule is that the number of the first sub-bands included in each second sub-band is the same, and the number of the first sub-bands included in each of the M second sub-bands is, for example, For 3, 3, 2 and 2, 4, 4, 1 and 1 etc.
  • the UE may adopt a continuous bandwidth division manner or a discontinuous bandwidth.
  • a division manner wherein the N first sub-bands are divided into the M second sub-bands, and when divided by the continuous bandwidth division manner, two adjacent ones of the second sub-bands The frequency corresponding to the first sub-bands is continuous; when divided by the non-contiguous bandwidth division manner, at least one of the adjacent two first sub-bands in each of the second sub-bands does not have a frequency corresponding to continuous.
  • the base station and the UE may configure, according to the predefined rule, the number of first subbands included in each of the M second subbands, if The predefined rule is that the number of the first sub-bands included in each second sub-band is the same, and the first sub-bands included in each of the M second sub-bands may be determined.
  • the numbers are, for example, 3, 3, 2, and 2. If the division is performed in the continuous bandwidth division manner, the sub-band 0, sub-band 1, sub-band 2, sub-band 3, sub-band 4, sub-band 5, sub-band 6.
  • Subband 7, subband 8, and subband 9 define four second subbands, such as A subband, B subband, C subband, and D subband, where A The sub-band includes sub-band 0, sub-band 1 and sub-band 2; B sub-band includes sub-band 3, sub-band 4 and sub-band 5; C sub-band includes sub-band 6 and sub-band 7; D sub-band includes sub-band 8 and sub-band 9
  • a The sub-band includes sub-band 0, sub-band 1 and sub-band 2; B sub-band includes sub-band 3, sub-band 4 and sub-band 5; C sub-band includes sub-band 6 and sub-band 7; D sub-band includes sub-band 8 and sub-band 9
  • the frequency corresponding to two adjacent first sub-bands in each of the second sub-bands is continuous.
  • the number of the first sub-bands included in the second sub-band in this embodiment is determined according to the predefined manner, different UEs are in different environments, and corresponding channel feature parameters, such as an angle extension, The frequency correlation and the spatial correlation are different, so that the number of the first sub-bands included in the second sub-band determined by the predefined manner may be the same or different, and the M corresponding to different UEs may be determined.
  • Each of the second sub-bands may include the same number of first sub-bands that may be the same or different.
  • step S103 is performed, in which the UE feeds back the first PMI corresponding to each second sub-band to the base station, and feeds back the second PMI corresponding to each first sub-band to the base station.
  • the UE determines, by using step S103, a first PMI corresponding to each of the M second sub-bands, and determining each of the N first sub-bands. After the second PMI corresponding to the subband, the first PMI corresponding to each second subband is fed back to the base station, and the second PMI corresponding to each first subband is fed back to the base station.
  • the first PMI and the second PMI have different time domains or frequency domain granularity, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband. .
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the Said base station.
  • an encoding method such as joint coding or differential coding
  • the UE may send the first PMI and the second PMI to the base station by using a UCCH or a PUSCH.
  • the number of determination is also ⁇ to M, with the UE and preclude the use of Determining, in the same manner, the M second sub-bands from the N first sub-bands, the first corresponding to the first second sub-band, and the second ⁇ corresponding to the second second sub-band By analogy, until the Nth second subband corresponds to ⁇ ( 3 ⁇ 4 ).
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column replacement.
  • the technical solution of the embodiment of the present application can be applied to a multiple input multiple output MIMO wireless system.
  • the technical solution of the present application is to select a precoding matrix from the codebook based on the received reference signal sent by the base station, and send a precoding matrix indicating PMI corresponding to the precoding matrix to the a base station, wherein the M second subbands are determined from the N first subbands, and a first PMI is fed back for each of the second subbands, so that the plurality of first PMIs are fed back to the base station, and one
  • the first PMI corresponds to a beam phase change range, so that when the beam phase changes greatly, the beam phase change of the entire bandwidth can be covered by multiple first precoding matrices, and in a scenario where the beam phase changes little,
  • the beam quantization granularity can be improved by the plurality of first precoding matrices, thereby matching the
  • the ninth embodiment of the present application provides a method for receiving a precoding matrix indication.
  • the specific processing procedure of the method is as follows:
  • Step S501 The base station sends a reference signal to the UE.
  • Step S502 The base station receives, in the system transmission bandwidth that is fed back by the UE, each of the second PMI and the second sub-band corresponding to each of the first sub-bands of the N first sub-bands.
  • a corresponding first PMI wherein the M second sub-bands are determined from the N first sub-bands, and at least one of the M second sub-bands includes at least one second sub-band
  • the base station has a codebook, and the codebook includes at least two precoding matrices, which can be corresponding to each of the second subbands.
  • the first PMI and the second PMI corresponding to each of the first sub-bands select a corresponding pre-coding matrix from the codebook.
  • the base station sends a reference signal to the UE.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the base station may further send the RRC signaling to the UE, where the RRC signaling includes the reference signal, so that the UE can acquire the reference signal based on the received RRC signaling.
  • step S502 is performed, in which the base station receives a second PMI and a second second sub-port corresponding to each of the N first sub-bands in the system transmission bandwidth fed back by the UE.
  • the base station has a codebook, and the codebook includes at least two precoding matrices, A first PMI corresponding to each second subband and a second PMI corresponding to each of the first subbands are selected, and a corresponding precoding matrix is selected from the codebook.
  • the system transmission bandwidth is a system transmission bandwidth of one carrier configured for the channel measurement by the UE, and the N first subbands in the system transmission bandwidth are according to the UE and the base station. Determined as defined in the agreement.
  • the N first sub-bands are all sub-bands or partial sub-bands in the system transmission bandwidth, and the UE and the base station determine the same N first children according to the same manner.
  • the bandwidth of each of the first sub-bands may be the same or different.
  • the UE may divide the system transmission bandwidth into N first sub-bands by means of a uniform halving method or a non-divided manner.
  • the UE can receive the reference signal, and based on the reference signal, from the codebook, the N first subbands.
  • Each of the first sub-bands selects a precoding matrix, each precoding matrix in the codebook is represented by at least a first PMI and a second PMI, and then each of the second subbands corresponds to a first PMI and each a second PMI corresponding to the first sub-band is fed back to the base station, so that the base station can receive the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands And searching for a corresponding precoding matrix from the codebook according to the first PMI corresponding to each of the second subbands and the second PMI corresponding to each of the first subbands.
  • the first PMI feedback corresponding to each second subband is Up to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, such that the base
  • the station receives the first PMI corresponding to each second sub-band fed back by the UE and the second PMI corresponding to each first sub-band, and the following describes that the UE is the N first from the codebook.
  • the specific implementation process of selecting a precoding matrix for each first subband in the subband is as follows:
  • the UE after receiving the reference signal, the UE selects a precoding matrix before selecting a first subband in each of the N first subbands in the system transmission bandwidth from the codebook. And determining, by the N first subbands, the M second subbands, after determining the M second subband, from the codebook, N of system transmission bandwidths Each of the first sub-bands selects a pre-coding matrix, wherein each of the N first sub-bands corresponds to a second PMI, and the M second sub-bands Each of the second sub-bands corresponds to a first PMI, and all of the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one
  • the second sub-band is included, and since each of the M second sub-bands corresponds to a first PMI, all the second sub-bands included in the at least two first sub-bands are included One subband corresponds to the same first PMI.
  • the UE when determining the M second subbands from the N first subbands, the UE first determines a value of the M, and according to the value of the M, from the N Determining the M second sub-bands in the first sub-band, where the determining, by the UE, the value of the M is determined according to the UE configuration manner, for example, determining the value of the M
  • the N first sub-bands are divided into the M second sub-bands, and since at least one second sub-band includes at least two first sub-bands, the value of the M is smaller than the N Value.
  • the step of determining, by the UE, the value of the M includes: determining, by the UE, a channel estimation based on the reference signal; determining, by the UE, the M according to the channel estimation and the codebook. a value, wherein a system capacity when the M second sub-bands are selected is greater than a threshold value when a system capacity of the M-1 second sub-bands is selected, and of course, the M numbers may be selected.
  • the system performance gain when the two sub-bands are selected to be M-1 second sub-bands is greater than the threshold value, and the system performance includes system capacity, system throughput, system spectrum efficiency, and the like.
  • the threshold is determined according to an actual situation, and the value of the M is not greater than the codebook.
  • Precoding The number of matrices, for example, the number of the precoding matrices is 5, and the value of the M is at most 5 and the minimum is 2.
  • the UE may divide the N first sub-bands into the M firsts by using a continuous bandwidth division manner or a discontinuous bandwidth division manner.
  • the frequencies corresponding to the adjacent two first sub-bands in each of the second sub-bands are continuous; and are divided by the discontinuous bandwidth division manner
  • At least one of the adjacent two first sub-bands in each of the second sub-bands has a discontinuity in frequency.
  • the M first sub-bands correspond to the M first PMIs, such that each of the first PMIs corresponds to a part of the system transmission bandwidth, and each part of the system transmission bandwidth has a corresponding bandwidth.
  • a PMI such that the M first PMIs cover the beam phase variation of the transmission bandwidth of the system, reducing system performance loss; and because each first PMI corresponds to only a part of the transmission bandwidth of the system, thereby making the quantized granularity of the beam vector Accuracy is improved.
  • the first PMI corresponding to at least two of the M second sub-bands is different.
  • the value of the M is determined according to the channel estimation and the codebook, and when different UEs are in different environments, corresponding channel characteristic parameters such as angular spread, frequency correlation, spatial correlation, and/or If the codebooks are different, the number of the second sub-bands corresponding to each UE, that is, the M value, may be the same or different.
  • system transmission bandwidths corresponding to different UEs may be the same or different, and the system transmission bandwidth may be divided into N first sub-bands by a uniform halving method or a non-division manner, so that different determinities may be determined.
  • the value of the N corresponding to the UE may be the same or different, and the number of the second sub-bands corresponding to the different UEs may be the same or different.
  • the Each of the M second sub-bands corresponding to the two UEs includes the number of the first sub-bands that are different; and when the two values of the two UEs are the same, and the M values are the same, the Each of the M second sub-bands corresponding to the two UEs may include the same number of the first sub-bands, such that each of the M second sub-bands corresponding to at least two UEs Second The number of subbands containing the first subband is not the same or the same.
  • the UE after determining, by the UE, the M second subbands, select a precoding matrix for each of the N subbands from the codebook, and the UE will each second sub Sending a corresponding first PMI to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station can receive the first corresponding to each of the second sub-bands The PMI and the second PMI corresponding to each of the first sub-bands.
  • the first PMI and the second PMI have different time domains or frequency domain granularities, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband.
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the
  • the base station is configured to enable the base station to receive the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands.
  • the UE may send the first PMI and the second PMI to the base station by using a PUCCH or a PUSCH, so that the base station can receive the first PMI corresponding to each of the second sub-bands, and each of the first A sub-band corresponds to the second PMI.
  • the number of determination is also ⁇ to M, with the UE and preclude the use of Determining, in the same manner, the M second sub-bands from the N first sub-bands, the first corresponding to the first second sub-band, and the second ⁇ corresponding to the second second sub-band Analogy, until the Nth second sub-band corresponds
  • the N first subbands are divided in the continuous bandwidth manner.
  • sub-band 0, sub-band 1, sub-band 2, sub-band 3, sub-band 4, sub-band 5, sub-band 6, sub-band 7, sub-band 8, and sub-band 9 are determined 4 second sub-bands, wherein the four sub-bands are A sub-band, B sub-band, C sub-band and D sub-band, wherein the A sub-band includes sub-band 0, sub-band 1 and sub-band 2, B Child
  • the strip includes a sub-band 3, a sub-band 4 and a sub-band 5, the C sub-band includes a sub-band 6 and a sub-band 7, and the D sub-band includes a sub-band 8 and a sub-band 9, due to each of the four second sub-bands
  • the second sub-band corresponds to a first PMI, and the UE feed
  • the A subband includes a subband 0, a subband 1 and a subband 2
  • the B subband includes a subband 3, a subband 4, and a subband 5
  • the C subband includes Subband 6 and subband 7, and D subband include subband 8 and subband 9.
  • the base station corresponds to the first PMI corresponding to the A subband fed back by the UE
  • the first PMI corresponding to the B subband is 7
  • the first PMI corresponding to the C subband is 9, and D
  • the first PMI corresponding to the subband is 11, and the second PMI corresponding to subband 0 is 0,
  • the second PMI corresponding to subband 1 is 2
  • the second PMI corresponding to subband 2 is 9, and the subband 3 corresponds to
  • the second PMI is 3, the second PMI corresponding to the subband 5 is 11, the second PMI corresponding to the subband 6 is 1, and the second PMI corresponding to the subband 7 is 3.
  • the second PMI corresponding to the band 8 is 3, and the second PMI corresponding to the sub-band 9 is 10.
  • the precoding matrix corresponding to the subband 0 is ⁇ ( and the precoding matrix corresponding to the subband 1 is W ⁇ 2 and the sub-band 2 corresponding to the precoding matrix W 2 (21 is, sub-band 3 corresponding precoding matrix, subband 4 corresponding precoding matrix W 2 precoding matrix (u and subband 5 corresponding to W 2 + 2 , 3 , the precoding matrix corresponding to the subband 6 is W 2 and the precoding matrix corresponding to the subband 7 is W ⁇ , and the precoding matrix corresponding to the subband 8 is the precoding matrix corresponding to the subband 9 is W, 2 ( x 1 1 ) 1+2, 2
  • the method further includes: the base station receiving the value of the M reported by the UE.
  • the UE reports the value of the M to the base station, so that the base station can receive the value of the M, and use the UE.
  • the M second sub-bands are determined from the N first sub-bands in the same manner.
  • the base station can be configured according to the The number of the first PMI fed back by the UE is M, determining that the number of the 1 ⁇ is also M, and determining the M second children from the N first subbands in the same manner as the UE The first one corresponds to the first second sub-band, the second one corresponds to the second second sub-band, and so on, until the Nth second sub-band corresponds to ⁇ (n .
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column permutation.
  • the technical solution of the present application is that the base station receives the second PMI and the M second sub-bands corresponding to each of the first sub-bands of the N first sub-bands fed back by the UE.
  • Each of the second sub-bands corresponds to a first PMI
  • N and M are integers not less than 2, such that the base station receives multiple first PMIs
  • one first PMI corresponds to one beam phase change range.
  • the beam phase variation of the entire bandwidth may be covered by multiple first precoding matrices, and when the beam phase changes less, the first precoding matrix can be adopted by multiple first precoding matrices.
  • the beam quantization granularity is improved, and the codebook is matched with the beam phase scene, so that the system performance is improved.
  • each W ⁇ should be part of the system transmission bandwidth, and each part of the system transmission bandwidth has a corresponding bandwidth W l 7 and M is an integer not less than 2, so that the beam phase variation of the entire system transmission bandwidth is covered by multiple Ws, and the system performance loss is reduced; and since each ⁇ corresponds only to a part of the transmission bandwidth of the system, In turn, the quantized granularity accuracy of the beam vector is improved.
  • the tenth embodiment of the present application provides a method for receiving a precoding matrix indication.
  • the specific processing procedure of the method is as follows:
  • Step S501 The base station sends a reference signal to the UE.
  • Step S502 The base station receives, in the system transmission bandwidth that is fed back by the UE, each of the second PMI and the second sub-band corresponding to each of the first sub-bands of the N first sub-bands.
  • Belt Corresponding first PMI wherein the M second sub-bands are determined from the N first sub-bands, and at least one second sub-band of the M second sub-bands includes at least two a first sub-band, N and M are both positive integers not less than 2, the base station has a codebook, and the codebook includes at least two precoding matrices, which can be corresponding to each of the second sub-bands
  • the first PMI and the second PMI corresponding to each of the first subbands select a corresponding precoding matrix from the codebook.
  • the base station sends a reference signal to the UE.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the base station may further send the RRC signaling to the UE, where the RRC signaling includes the reference signal, so that the UE can acquire the reference signal based on the received RRC signaling.
  • step S502 is performed, in which the base station receives a second PMI and a second second sub-port corresponding to each of the N first sub-bands in the system transmission bandwidth fed back by the UE.
  • a first PMI corresponding to each of the second sub-bands wherein the M second sub-bands are determined from the N first sub-bands, and at least the M second sub-bands
  • the base station has a codebook, and the codebook includes at least two precoding matrices, A first PMI corresponding to each second subband and a second PMI corresponding to each of the first subbands are selected, and a corresponding precoding matrix is selected from the codebook.
  • the system transmission bandwidth is a system transmission bandwidth of one carrier configured for the channel measurement by the UE, and the N first subbands in the system transmission bandwidth are according to the UE and the base station. Determined as defined in the agreement.
  • the N first sub-bands are all sub-bands or partial sub-bands in the system transmission bandwidth, and the UE and the base station determine the same N first children according to the same manner.
  • the bandwidth of each of the first sub-bands may be the same or different.
  • the UE may divide the transmission bandwidth of the system into N first by means of a uniform halving method or a non-divided manner. Subband.
  • the UE can receive the reference signal, and based on the reference signal, from the codebook, the N first subbands.
  • Each of the first sub-bands selects a precoding matrix, and each precoding matrix in the codebook is represented by at least a first PMI and a second PMI, where the codebook includes at least two precoding matrices, and
  • Each precoding matrix is represented by at least a first PMI and a second PMI, and then feeds a first PMI corresponding to each second subband and a second PMI corresponding to each first subband to the base station, such that
  • the base station is capable of receiving the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands, and according to the first PMI corresponding to each of the second sub-bands and the A second PMI corresponding to each first subband searches for a corresponding precoding matrix from the codebook.
  • the first PMI feedback corresponding to each second subband is Up to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station receives the first PMI and each of the first sub-bands that are fed back by the UE A sub-band corresponding to the second PMI, the following describes a specific implementation process in which the UE selects a precoding matrix for each of the N first subbands from the codebook, as follows:
  • the UE after receiving the reference signal, the UE selects a precoding matrix before selecting a first subband in each of the N first subbands in the system transmission bandwidth from the codebook. And determining, by the N first subbands, the M second subbands, after determining the M second subband, from the codebook, N of system transmission bandwidths Each of the first sub-bands selects a pre-coding matrix, wherein each of the N first sub-bands corresponds to a second PMI, and the M second sub-bands Each of the second sub-bands corresponds to a first PMI, and all of the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one
  • the second sub-band is included, and since each of the M second sub-bands corresponds to a first PMI, all the second sub-bands included in the at least two first sub-bands are included One subband corresponds to the same first PMI.
  • the first PMI corresponding to at least two of the M second sub-bands is not in phase
  • the beam phase variation of the system transmission bandwidth can be covered by different first PMIs, thereby reducing the system performance loss, so that the quantization granularity precision of the beam vector is improved.
  • the M second sub-bands are improved.
  • the first PMI corresponding to at least two second sub-bands is different.
  • the UE when determining the M second subbands from the N first subbands, the UE first determines a value of the M, and according to the value of the M, from the N Determining, in the first sub-band, the M second sub-bands, where the determining, by the UE, the value of the M is determined according to the UE feedback manner, and determining, by using the UE feedback manner,
  • the determining step of the value of the M includes: receiving, by the base station, a value of the pre-selected M reported by the UE; and determining, by the base station, the value according to the pre-selected value of M
  • the value of M after determining the value of the M, the base station sends the value of the M to the UE.
  • the UE selects a value of the pre-selected M, and then reports the value of the pre-selected M to the base station.
  • the base station determines the value of the M according to the value of the pre-selected M, and the base station feeds back the determined value of the M to the UE, so that the The UE can receive the value of the M.
  • the determining, by the base station, the value of the M according to the value of the pre-selected M, the value of the M may be a value of the pre-selected M, or may be greater than or less than the pre-selected
  • the value of M is not specifically limited. For example, if the value of the pre-selected M is 3, the value of the M may be 3 or a value greater than 3, for example, 4. 5, etc.; may also be a value less than 3, for example, 2 or the like.
  • the user equipment first determines the value of the pre-selected M, and the value of the pre-selected M is, for example, an integer of 2, 3, 4, etc., not less than 2, and then performs step S401 to send a pre-selection.
  • the value of M is such that the base station can receive the value of the pre-selected M.
  • the base station After receiving the value of the pre-selected M, the base station performs step S402, and determines the M according to the value of the pre-selected M. After the value of the M is determined by the step S402, the base station performs step S403 to feed back the value of the M, so that the user equipment can receive the value of the M fed back by the base station, and then based on the value of the M.
  • Determining the M second sub-bands from the N first sub-bands specifically Refer to the above method. a continuous bandwidth division manner or a discontinuous bandwidth division manner, wherein the N first sub-bands are divided into the M second sub-bands, and when each is divided by the continuous bandwidth division manner, each of the The frequencies corresponding to the adjacent two first sub-bands in the two sub-bands are continuous; when divided in the discontinuous bandwidth partition manner, at least one set of adjacent two in each of the second sub-bands exists The frequency corresponding to the first sub-band is discontinuous.
  • the corresponding channel characteristic parameters such as angle expansion, frequency correlation, and spatial correlation, are different, so that the selected values of the pre-selected M may be the same or different, so that the base station is based on the value of the pre-selected M.
  • the value of the M may be the value of the pre-selected M, or may be greater or smaller than the value of the pre-selected M, such that the values of the M may be the same or different.
  • the values of M corresponding to different UEs may be the same or different, and the values of M corresponding to at least two UEs may be the same or different.
  • system transmission bandwidths corresponding to different UEs may be the same or different, and the system transmission bandwidth may be divided into N first sub-bands by a uniform halving method or a non-division manner, so that different determinities may be determined.
  • the value of the N corresponding to the UE may be the same or different, and the number of the second sub-bands corresponding to the different UEs may be the same or different.
  • the Each of the M second sub-bands corresponding to the two UEs includes the number of the first sub-bands that are different; and when the two values of the two UEs are the same, and the M values are the same, the Each of the M second sub-bands corresponding to the two UEs may include the same number of the first sub-bands, such that each of the M second sub-bands corresponding to at least two UEs The second sub-band includes the number of first sub-bands that are different or the same.
  • the UE after determining, by the UE, the M second subbands, select a precoding matrix for each of the N subbands from the codebook, and the UE will each second sub Sending a corresponding first PMI to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station can receive the first corresponding to each of the second sub-bands PMI and Each of the first sub-bands corresponds to a second PMI.
  • the first PMI and the second PMI have different time domains or frequency domain granularities, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband.
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the
  • the base station is configured to enable the base station to receive the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands.
  • the UE may send the first PMI and the second PMI to the base station by using a PUCCH or a PUSCH, so that the base station can receive the first PMI corresponding to each of the second sub-bands, and each of the first A sub-band corresponds to the second PMI.
  • the number of the first PMI that the base station can feed back according to the UE is M, determining that the number of the 1 ⁇ is also M, and using the same as the UE.
  • the method determines the M second sub-bands from the N first sub-bands, the first one corresponding to the first second sub-band, the second one corresponding to the second second sub-band, and so on, Until the Nth second sub-band corresponds
  • the base station determines, according to the value of the pre-selected M, that the value of the M is 4, and then 4, the user equipment is sent, so that the user equipment determines that the value of the M is 4, and then divides the N first sub-bands by the continuous bandwidth division manner, and then the sub-band 0, the sub-band 1, and the sub-band 2 , the sub-band 3, the sub-band 4, the sub-band 5, the sub-band 6, the sub-band 7, the sub-band 8, and the sub-band 9 define four second sub-bands, for example, the four second sub-bands are A sub-bands, a B subband, a C subband, and a D subband, wherein the A subband includes a subband 0, a subband 1 and a subband 2, the B subband includes a subband 3, a subband 4, and a subband 5, and the C subband includes
  • the base station also divides the N first sub-bands by using a continuous bandwidth division manner, from the N first sub-bands Determined as four second sub-bands of the A sub-band, the B sub-band, the C sub-band, and the D sub-band, wherein each of the A, B, C, and D sub-bands
  • the bandwidth corresponding to every two adjacent first sub-bands included in the second sub-band is continuous.
  • the base station corresponds to the first PMI corresponding to the A subband fed back by the UE
  • the first PMI corresponding to the B subband is 7
  • the first PMI corresponding to the C subband is The first PMI corresponding to 9, and the D subband is 11, and the second PMI corresponding to subband 0 is 0,
  • the second PMI corresponding to subband 1 is 2, and the second PMI corresponding to subband 2 is 9, sub
  • the second PMI corresponding to the band 3 is 3
  • the second PMI corresponding to the sub-band 4 is 5, the second PMI corresponding to the sub-band 5 is 11, the second PMI corresponding to the sub-band 6 is 1, and the second sub-band 7 corresponds to the second.
  • the PMI is 3, the second PMI corresponding to the subband 8 is 3, and the second PMI corresponding to the subband 9 is 10, so that the precoding matrix corresponding to the subband 0 can be determined from Table 1 as W 2 ( , subband 1
  • the corresponding precoding matrix is W 2 2 and the precoding matrix corresponding to the subband 2 is W ⁇
  • the precoding matrix corresponding to the subband 3 is ⁇ 3 ⁇ 4 3
  • the precoding matrix corresponding to the subband 4 is the precoding matrix corresponding to the subband 5
  • the precoding matrix corresponding to the subband 6 is w ⁇ and the precoding matrix corresponding to the subband 7 is w 2 3
  • the precoding matrix corresponding to the subband 8 is the precoding matrix corresponding to the subband 9
  • the first PMI is corresponding to one, so that the base station can determine that the quantity of the ⁇ is also M according to the quantity of the first PMI fed back by the UE, and use the same manner as the UE
  • the first ⁇ corresponds to the first second sub-band
  • the second ⁇ corresponds to the second second sub-band
  • the Nth second sub-band corresponds to ⁇ ( ⁇ 3 ⁇ 4).
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column permutation.
  • the technical solution of the present application is that the base station receives the second PMI and the M second sub-bands corresponding to each of the first sub-bands of the N first sub-bands fed back by the UE.
  • Each of the second sub-bands corresponds to a first PMI
  • N and M are integers not less than 2, such that the base station receives multiple first PMIs, and one first PMI corresponds to one beam phase change range.
  • the first precoding matrix can be used to cover the whole
  • the beam phase of the bandwidth changes, and when the beam phase changes little, the beam quantization granularity can be improved by the multiple first precoding matrices, and the codebook and the beam phase scene are matched, so that the system performance is improved.
  • the eleventh embodiment of the present application provides a method for receiving a precoding matrix indication.
  • the specific processing procedure of the method is as follows:
  • Step S501 The base station sends a reference signal to the UE.
  • Step S502 The base station receives, in the system transmission bandwidth that is fed back by the UE, each of the second PMI and the second sub-band corresponding to each of the first sub-bands of the N first sub-bands.
  • a corresponding first PMI wherein the M second sub-bands are determined from the N first sub-bands, and at least one of the M second sub-bands includes at least one second sub-band
  • the base station has a codebook, and the codebook includes at least two precoding matrices, which can be corresponding to each of the second subbands.
  • the first PMI and the second PMI corresponding to each of the first sub-bands select a corresponding pre-coding matrix from the codebook.
  • the base station sends a reference signal to the UE.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the base station may further send the RRC signaling to the UE, where the RRC signaling includes the reference signal, so that the UE can acquire the reference signal based on the received RRC signaling.
  • step S502 is performed, in which the base station receives a second PMI and a second second sub-port corresponding to each of the N first sub-bands in the system transmission bandwidth fed back by the UE.
  • a first PMI corresponding to each of the second sub-bands wherein the M second sub-bands are determined from the N first sub-bands, and at least the M second sub-bands
  • the base station has a codebook
  • the codebook includes at least two precoding matrices, and can select a corresponding one from the codebook according to the first PMI corresponding to each of the second subbands and the second PMI corresponding to each of the first subbands. Precoding matrix.
  • the system transmission bandwidth is a system transmission bandwidth of one carrier configured for the channel measurement by the UE, and the N first subbands in the system transmission bandwidth are according to the UE and the base station. Determined as defined in the agreement.
  • the N first sub-bands are all sub-bands or partial sub-bands in the system transmission bandwidth, and the UE and the base station determine the same N first children according to the same manner.
  • the bandwidth of each of the first sub-bands may be the same or different.
  • the UE may divide the system transmission bandwidth into N first sub-bands by means of a uniform halving method or a non-divided manner.
  • the UE can receive the reference signal, and based on the reference signal, from the codebook, the N first subbands.
  • Each of the first sub-bands selects a precoding matrix, and each precoding matrix in the codebook is represented by at least a first PMI and a second PMI, where the codebook includes at least two precoding matrices, and
  • Each precoding matrix is represented by at least a first PMI and a second PMI, and then feeds a first PMI corresponding to each second subband and a second PMI corresponding to each first subband to the base station, such that
  • the base station is capable of receiving the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands, and according to the first PMI corresponding to each of the second sub-bands and the A second PMI corresponding to each first subband searches for a corresponding precoding matrix from the codebook.
  • the first PMI feedback corresponding to each second subband is Up to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station receives the first PMI and each of the first sub-bands that are fed back by the UE A sub-band corresponding to the second PMI, the following describes a specific implementation process in which the UE selects a precoding matrix for each of the N first subbands from the codebook, as follows:
  • the UE after receiving the reference signal, the UE is in the codebook. Before selecting a precoding matrix for each of the N first subbands in the system transmission bandwidth, determining the M second subbands from the N first subbands, After determining the M second subband, selecting, from the codebook, a precoding matrix for each of the N first subbands in the system transmission bandwidth, where the N Each of the first sub-bands corresponds to a second PMI, and each of the M second sub-bands corresponds to a first PMI, and all of the M second sub-bands
  • the first sub-band is the N first sub-bands, and each of the first sub-bands can only be included by one second sub-band, and because each of the M second sub-bands is second sub-band Corresponding to a first PMI, all first sub-bands included in the second sub-band including at least two first sub-bands correspond to the same first PMI.
  • the first PMI corresponding to at least two second sub-bands of the M second sub-bands is different, so that the beam phase change of the system transmission bandwidth can be covered by different first PMIs, thereby reducing the beam phase variation.
  • the system performance loss is such that the quantization granularity accuracy of the beam vector is improved. Further, the first PMI corresponding to at least two of the M second sub-bands is different.
  • the UE when determining the M second subbands from the N first subbands, the UE first determines a value of the M, and according to the value of the M, from the N Determining, in the first sub-band, the M second sub-bands, where the value of the M is configured by the base station, that is, the value that represents the M is determined by using the base station configuration manner, and the base station is configured The value of the M determined by the configuration of the base station is sent to the UE, so that the UE receives the value of the M, and then, according to the value of the M, from the N first subbands. Determining the M second sub-bands.
  • the base station may directly set the value of the M, or determine the value of the M according to the transmission bandwidth of the system.
  • the value of the M set by the base station is, for example, 3, 4, and 5, and then the base station sends the value of the M to the UE, so that the UE receives the value of the M, and then Determining the M second sub-bands from the N first sub-bands according to the value of the M.
  • the base station determines the value of the M according to the system transmission bandwidth, for example, when the system transmission bandwidth is not greater than 10 MHz, the base station sets the value of the M to 3, 4, 5, and the like. a value, the base station sets the value of the M to 4 when the system transmission bandwidth is greater than 10 MHz. 5, 6 equal value, then the base station sends the value of the M to the UE, so that the UE receives the value of the M, and according to the value of the M, from the N first children
  • the M second sub-bands are determined in the band.
  • the UE may divide the N first sub-bands into the M by using a continuous bandwidth division manner or a discontinuous bandwidth division manner.
  • the second sub-bands when divided in the continuous bandwidth division manner, the frequencies corresponding to the adjacent two first sub-bands in each of the second sub-bands are continuous; and are divided by the discontinuous bandwidth
  • the mode division at least one of the adjacent two first sub-bands in each of the second sub-bands has a discontinuity in frequency.
  • the value of the M is configured by the base station, different UEs are in different environments, and corresponding channel characteristic parameters, such as angle extension, frequency correlation, and spatial correlation, are different, so that the value of the M configured by the base station is different.
  • the values of M corresponding to different UEs may be the same or different, and the values of M corresponding to at least two UEs may be the same or different.
  • system transmission bandwidths corresponding to different UEs may be the same or different, and the system transmission bandwidth may be divided into N first sub-bands by a uniform halving method or a non-division manner, so that different determinities may be determined.
  • the value of the N corresponding to the UE may be the same or different, and the number of the second sub-bands corresponding to the different UEs may be the same or different.
  • the Each of the M second sub-bands corresponding to the two UEs includes the number of the first sub-bands that are different; and when the two values of the two UEs are the same, and the M values are the same, the Each of the M second sub-bands corresponding to the two UEs may include the same number of the first sub-bands, such that each of the M second sub-bands corresponding to at least two UEs The second sub-band includes the number of first sub-bands that are different or the same.
  • the UE after determining, by the UE, the M second subbands, select a precoding matrix for each of the N subbands from the codebook, and the UE will each second sub Sending a corresponding first PMI to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station can receive the first corresponding to each of the second sub-bands PMI and Each of the first sub-bands corresponds to a second PMI.
  • the first PMI and the second PMI have different time domains or frequency domain granularities, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband.
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the
  • the base station is configured to enable the base station to receive the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands.
  • the UE may send the first PMI and the second PMI to a base station by using a PUCCH or a PUSCH, so that the base station can receive the first PMI and the each corresponding to each of the second sub-bands.
  • the number of the first PMI that the base station can feed back according to the UE is M, determining that the number of the 1 ⁇ is also M, and using the same as the UE.
  • the method determines the M second sub-bands from the N first sub-bands, the first one corresponding to the first second sub-band, the second one corresponding to the second second sub-band, and so on, Until the Nth second sub-band corresponds
  • the base station determines that the value of the M is 4 according to the system transmission bandwidth, and then feeds back the value of the M to the UE, so that the The UE receives the value of the M that is fed back by the base station, so that the UE determines that the value of the M is 4, and then divides the N first sub-bands by using the discontinuous bandwidth division manner, and the sub-band 10.
  • the sub-band 11, the sub-band 12, the sub-band 13, the sub-band 14, the sub-band 15, the sub-band 16, the sub-band 17, the sub-band 18 and the sub-band 19 define four second sub-bands, for example, the four
  • the second sub-band is an A1 sub-band, a B1 sub-band, a C1 sub-band and a D1 sub-band, wherein the A1 sub-band includes a sub-band 10, a sub-band 12 and a sub-band 14, and the B1 sub-band includes a sub-band 11, a sub-band 13 and a sub-band a band 15, a C1 sub-band includes a sub-band 16 and a sub-band 18, and the D1 sub-band includes a sub-band 17 and a sub-band 19; similarly, the base station also divides the N first sub-sections by using the discontinuous bandwidth division manner Band, determined from the N first sub-bands as A1 sub-band, B1 sub-band, C1 Four second sub-bands
  • the base station may further receive, according to the second PMI and the sub-band 10-subband 19 corresponding to each of the second sub-bands of the Al, Bl, CI, and D1 fed back by the UE.
  • Corresponding first PMI selecting a corresponding precoding matrix from the codebook.
  • the base station can determine that the number of the 1 ⁇ is also M according to the number of the first PMI fed back by the UE, and use the same manner as the UE. Determining the M second sub-bands from the N first sub-bands, the first W corresponding to the first second sub-band, the second ⁇ corresponding to the second second sub-band, and so on, Until the Nth second sub-band corresponds to ⁇ ⁇ ( 3 ⁇ 4 ).
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column permutation.
  • the technical solution of the present application is that the base station receives the second and second sub-bands corresponding to each of the first sub-bands of the first sub-bands fed back by the UE.
  • Each of the second sub-bands corresponds to a first frame, and both ⁇ and ⁇ are integers not less than 2, such that the base station receives a plurality of first frames, and a first frame corresponds to a beam phase variation range.
  • the beam phase variation of the entire bandwidth may be covered by multiple first precoding matrices, and when the beam phase changes less, the first precoding matrix can be adopted by multiple first precoding matrices.
  • the beam quantization granularity is improved, and the codebook is matched with the beam phase scene, so that the system performance is improved.
  • the twelfth embodiment of the present application provides a receiving method of the precoding matrix indication.
  • the specific processing procedure of the method is as follows:
  • Step S501 The base station sends a reference signal to the UE.
  • Step S502 The base station receives the first one of the system transmission bandwidths fed back by the UE. a first PMI corresponding to each of the second sub-bands of each of the first sub-bands and the second sub-bands of the M second sub-bands, wherein the M second sub-bands are from the N Determining in the first sub-band, and at least one second sub-band of the M second sub-bands includes at least two first sub-bands, N and M are positive integers not less than 2, the base station Having a codebook, the codebook includes at least two precoding matrices, according to the first PMI corresponding to each of the second subbands and the second PMI corresponding to each of the first subbands, The corresponding precoding matrix is selected in the codebook.
  • the base station sends a reference signal to the UE.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the base station may further send the RRC signaling to the UE, where the RRC signaling includes the reference signal, so that the UE can acquire the reference signal based on the received RRC signaling.
  • step S502 is performed, in which the base station receives a second PMI and a second second sub-port corresponding to each of the N first sub-bands in the system transmission bandwidth fed back by the UE.
  • a first PMI corresponding to each of the second sub-bands wherein the M second sub-bands are determined from the N first sub-bands, and at least the M second sub-bands
  • the base station has a codebook, and the codebook includes at least two precoding matrices, A first PMI corresponding to each second subband and a second PMI corresponding to each of the first subbands are selected, and a corresponding precoding matrix is selected from the codebook.
  • the system transmission bandwidth is a system transmission bandwidth of one carrier configured for the channel measurement by the UE, and the N first subbands in the system transmission bandwidth are according to the UE and the base station. Determined as defined in the agreement.
  • the N first sub-bands are all sub-bands or partial sub-bands in the system transmission bandwidth, and the UE and the base station determine the same N first children according to the same manner.
  • the system transmission bandwidth can be divided into N first sub-bands by a uniform hooking method or a non-dividing method.
  • the UE can receive the reference signal, and based on the reference signal, from the codebook, the N first subbands.
  • Each of the first sub-bands selects a precoding matrix, each precoding matrix in the codebook is represented by at least a first PMI and a second PMI, and then each of the second subbands corresponds to a first PMI and each a second PMI corresponding to the first sub-band is fed back to the base station, so that the base station can receive the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands And searching for a corresponding precoding matrix from the codebook according to the first PMI corresponding to each of the second subbands and the second PMI corresponding to each of the first subbands.
  • the first PMI feedback corresponding to each second subband is Up to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station receives the first PMI and each of the first sub-bands that are fed back by the UE A sub-band corresponding to the second PMI, the following describes a specific implementation process in which the UE selects a precoding matrix for each of the N first subbands from the codebook, as follows:
  • the UE after receiving the reference signal, the UE selects a precoding matrix before selecting a first subband in each of the N first subbands in the system transmission bandwidth from the codebook. And determining, by the N first subbands, the M second subbands, after determining the M second subband, from the codebook, N of system transmission bandwidths Each of the first sub-bands selects a pre-coding matrix, wherein each of the N first sub-bands corresponds to a second PMI, and the M second sub-bands Each of the second sub-bands corresponds to a first PMI, and all of the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one
  • the second sub-band is included, and since each of the M second sub-bands corresponds to a first PMI, all the second sub-bands included in the at least two first sub-bands are included One subband corresponds to the same first PMI.
  • the first PMI corresponding to at least two of the M second sub-bands is not in phase
  • the beam phase variation of the system transmission bandwidth can be covered by different first PMIs, thereby reducing the system performance loss, so that the quantization granularity precision of the beam vector is improved.
  • the M second sub-bands are improved.
  • the first PMI corresponding to at least two second sub-bands is different.
  • the UE when determining the M second subbands from the N first subbands, the UE first determines a value of the M, and according to the value of the M, from the N Determining, in the first subband, the M second subbands, where the value of the M is determined in a predefined manner, when determining the value of the M in the predefined manner, the UE And the base station may pre-set the same value as the value of the M.
  • the value of the M may be set to a value of 3, 4, or 5; the UE may further set according to the system transmission bandwidth.
  • the value of M when the system transmission bandwidth is not more than 10 MHz, the value of the M is, for example, 2, 3, 4, etc., when the system transmission bandwidth is greater than the 10 MHz, the value of the M is, for example. It is 3, 4, 5 and so on.
  • the UE may divide the N first sub-bands into a continuous bandwidth partitioning manner or a discontinuous bandwidth partitioning manner.
  • the M second sub-bands when divided in the continuous bandwidth division manner, the frequencies corresponding to the adjacent two first sub-bands in each of the second sub-bands are continuous;
  • the bandwidth division mode is divided, at least one of the adjacent two first sub-bands in each of the second sub-bands has a frequency discontinuity.
  • the value of the M is determined by the predefined manner, different UEs are in different environments, and corresponding channel feature parameters, such as angle extension, frequency correlation, and spatial correlation, are different.
  • the values of M corresponding to the UE may be the same or different, and the values of M corresponding to at least two UEs may be the same or different.
  • system transmission bandwidths corresponding to different UEs may be the same or different, and the system transmission bandwidth may be divided into N first sub-bands by a uniform halving method or a non-division manner, so that different determinities may be determined.
  • the value of the N corresponding to the UE may be the same or different, and the number of the second sub-bands corresponding to the different UEs may be the same or different.
  • the Each of the M second sub-bands corresponding to the two UEs includes The number of the first sub-bands is different; and when the N values corresponding to the two UEs are the same, and the M values are the same, the second sub-bands of the M second sub-bands corresponding to the two UEs are included.
  • the number of the first sub-bands may be the same, such that the number of the first sub-bands in each of the M second sub-bands corresponding to at least two UEs is different or the same.
  • the UE after determining, by the UE, the M second subbands, select a precoding matrix for each of the N subbands from the codebook, and the UE will each second sub Sending a corresponding first PMI to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station can receive the first corresponding to each of the second sub-bands The PMI and the second PMI corresponding to each of the first sub-bands.
  • the first PMI and the second PMI have different time domains or frequency domain granularities, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband.
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the
  • the base station is configured to enable the base station to receive the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands.
  • the UE may send the first PMI and the second PMI to a base station by using a PUCCH or a PUSCH, so that the base station can receive the first PMI and the each corresponding to each of the second sub-bands.
  • the number of determination is also ⁇ to M, with the UE and preclude the use of Determining, in the same manner, the M second sub-bands from the N first sub-bands, the first corresponding to the first second sub-band, and the second ⁇ corresponding to the second second sub-band By analogy, until the Nth second subband corresponds to ⁇ ( 3 ⁇ 4 ).
  • the predefined manner is that the number of the first sub-bands included in each second sub-band is the same, so that the UE and the base station are according to the
  • the strip includes subband 0 and subband 1, the second second subband includes subband 2 and subband 3, the third second subband includes subband 4 and subband 5, and the fourth second subband includes subband 6 And the sub-band 7, and the fifth second sub-band includes the sub-band 8 and the sub-band 9.
  • the base station may also obtain the value of the M according to the quantity of the first PMI that is fed back by the UE, and determine the value from the N first subbands in the same manner as the UE. M second sub-bands, the first ⁇ corresponds to the first second sub-band, the second ⁇ corresponds to the second second sub-band, and so on, until the Nth second sub-band corresponds to ⁇ ( 3 ⁇ 4 ) .
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column permutation.
  • the technical solution of the present application is that the base station receives the second PMI and the M second sub-bands corresponding to each of the first sub-bands of the N first sub-bands fed back by the UE.
  • Each of the second sub-bands corresponds to a first PMI
  • N and M are integers not less than 2, such that the base station receives multiple first PMIs
  • one first PMI corresponds to one beam phase change range.
  • the beam phase variation of the entire bandwidth may be covered by multiple first precoding matrices, and when the beam phase changes less, the first precoding matrix can be adopted by multiple first precoding matrices.
  • the beam quantization granularity is improved, and the codebook is matched with the beam phase scene, so that the system performance is improved.
  • the thirteenth embodiment of the present application provides a receiving method of the precoding matrix indication.
  • the specific processing procedure of the method is as follows:
  • Step S501 The base station sends a reference signal to the UE.
  • Step S502 The base station receives, in the system transmission bandwidth that is fed back by the UE, each of the second PMI and the second sub-band corresponding to each of the first sub-bands of the N first sub-bands.
  • Belt Corresponding first PMI wherein the M second sub-bands are determined from the N first sub-bands, and at least one second sub-band of the M second sub-bands includes at least two a first sub-band, N and M are both positive integers not less than 2, the base station has a codebook, and the codebook includes at least two precoding matrices, which can be corresponding to each of the second sub-bands
  • the first PMI and the second PMI corresponding to each of the first subbands select a corresponding precoding matrix from the codebook.
  • the base station sends a reference signal to the UE.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the base station may further send the RRC signaling to the UE, where the RRC signaling includes the reference signal, so that the UE can acquire the reference signal based on the received RRC signaling.
  • step S502 is performed, in which the base station receives a second PMI and a second second sub-port corresponding to each of the N first sub-bands in the system transmission bandwidth fed back by the UE.
  • a first PMI corresponding to each of the second sub-bands wherein the M second sub-bands are determined from the N first sub-bands, and at least the M second sub-bands
  • the base station has a codebook, and the codebook includes at least two precoding matrices, A first PMI corresponding to each second subband and a second PMI corresponding to each of the first subbands are selected, and a corresponding precoding matrix is selected from the codebook.
  • the system transmission bandwidth is a system transmission bandwidth of one carrier configured for the channel measurement by the UE, and the N first subbands in the system transmission bandwidth are according to the UE and the base station. Determined as defined in the agreement.
  • the N first sub-bands are all sub-bands or partial sub-bands in the system transmission bandwidth, and the UE and the base station determine the same N first children according to the same manner.
  • the bandwidth of each of the first sub-bands may be the same or different.
  • the UE may divide the transmission bandwidth of the system into N first by means of a uniform halving method or a non-divided manner. Subband.
  • the UE can receive the reference signal, and based on the reference signal, from the codebook, the N first subbands.
  • Each of the first sub-bands selects a precoding matrix, each precoding matrix in the codebook is represented by at least a first PMI and a second PMI, and then each of the second subbands corresponds to a first PMI and each a second PMI corresponding to the first sub-band is fed back to the base station, so that the base station can receive the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands And searching for a corresponding precoding matrix from the codebook according to the first PMI corresponding to each of the second subbands and the second PMI corresponding to each of the first subbands.
  • the first PMI feedback corresponding to each second subband is Up to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station receives the first PMI and each of the first sub-bands that are fed back by the UE A sub-band corresponding to the second PMI, the following describes a specific implementation process in which the UE selects a precoding matrix for each of the N first subbands from the codebook, as follows:
  • the UE after receiving the reference signal, the UE selects a precoding matrix before selecting a first subband in each of the N first subbands in the system transmission bandwidth from the codebook. And determining, by the N first subbands, the M second subbands, after determining the M second subband, from the codebook, N of system transmission bandwidths Each of the first sub-bands selects a pre-coding matrix, wherein each of the N first sub-bands corresponds to a second PMI, and the M second sub-bands Each of the second sub-bands corresponds to a first PMI, and all of the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one
  • the second sub-band is included, and since each of the M second sub-bands corresponds to a first PMI, all the second sub-bands included in the at least two first sub-bands are included One subband corresponds to the same first PMI.
  • the first PMI corresponding to at least two second sub-bands of the M second sub-bands are different, so that the beam phase variation of the system transmission bandwidth can be covered by different first PMIs. In addition, the system performance loss is reduced, and the quantization granularity accuracy of the beam vector is improved. Further, the first PMI corresponding to at least two of the M second sub-bands is different.
  • the UE when determining the M second sub-bands from the N first sub-bands, the UE first determines, where each second sub-band of the M second sub-bands includes Determining, by the number of one subband, the M second subbands from the N first subbands according to the number of first subbands included in each second subband, where the UE The number of first sub-bands included in each second sub-band is determined according to the UE configuration manner.
  • the UE may determine, according to the N first sub-bands, the second second sub-sub
  • the number of the first sub-bands is included in the band, for example, the number of the first sub-bands included in each of the M second sub-bands may be the same value, or the M numbers may be used.
  • Each of the second sub-bands includes a first sub-band having a different number or a portion of the same value.
  • each second sub-band includes the number of the first sub-band
  • the UE may adopt a continuous bandwidth division manner or a discontinuous bandwidth division manner, thereby
  • the N first sub-bands are divided into the M second sub-bands, and when divided by the continuous bandwidth division manner, the frequency corresponding to the adjacent two first sub-bands in each of the second sub-bands is Continuously; when divided in the discontinuous bandwidth partition manner, at least one of the adjacent two first sub-bands in each of the second sub-bands has a frequency discontinuity.
  • each second sub-band when determining, according to the UE configuration manner, each second sub-band includes the number of the first sub-band, determining, according to the N first sub-bands, each second sub-band includes the first The number of the sub-bands, the environment of the different UEs is different, and the value of the corresponding N may be the same or different, so that each second sub-band determined by the UE configuration mode includes the number of the first sub-bands, The same or different, further determining that each of the M second sub-bands corresponding to different UEs includes the first sub-bands may be the same or different, and the M corresponding to at least two UEs Each of the second sub-bands includes a different number of first sub-bands.
  • the M second subbands After determining, by the UE, the M second subbands, select a precoding matrix for each of the N subbands from the codebook, and the UE will each second sub With corresponding The first PMI is fed back to the base station, and the second PMI corresponding to each first sub-band is fed back to the base station, so that the base station can receive the first PMI corresponding to each of the second sub-bands.
  • Each of the first sub-bands corresponds to a second PMI.
  • the first PMI and the second PMI have different time domains or frequency domain granularities, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband.
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the
  • the base station is configured to enable the base station to receive the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands.
  • the UE may send the first PMI and the second PMI to a base station by using a PUCCH or a PUSCH, so that the base station can receive the first PMI and the each corresponding to each of the second sub-bands.
  • the M second sub-bands are determined from the N first sub-bands in the same manner as the UE.
  • the first W ⁇ should be the first second sub-band
  • the second ⁇ corresponds to the second second sub-band
  • the Nth second sub-band corresponds to ⁇ (13 ⁇ 4).
  • the base station may obtain the value of the M according to the quantity obtained by the first PMI fed back by the UE, and determine, by using the N first subbands in the same manner as the UE. Said M second sub-bands, the first W ⁇ should be the first second sub-band, the second ⁇ corresponds to the second second sub-band, and so on, until the Nth second sub-band corresponds to ⁇ ⁇ (!3 ⁇ 4).
  • the UE is determined according to subband 0, subband 1, subband 2, subband 3, subband 4, subband 5, subband 6, subband 7, subband 8, and subband 9.
  • the number of the first sub-bands included in each of the M second sub-bands is the same value, the number of the first sub-bands included in each second sub-band may be determined.
  • the number of the first sub-bands included in each second sub-band may be 2 or 5, and when the number of the first sub-bands included in each second sub-band is 2, if the continuous bandwidth is divided Dividing, the N first sub-bands are divided into 5 second sub-bands, wherein the first second sub-band of the 5 second sub-bands includes sub-band 0 and sub-band 1, second The second sub-band includes sub-band 2 and sub-band 3, the third second sub-band includes sub-band 4 and sub-band 5, and the fourth second sub-band includes sub-band 6 and sub-band 7, and a fifth second sub- The band includes the subband 8 and the subband 9, such that the UE sends 5 first PMIs to the base station, so that the base station determines that the value of the M is 5 according to the number of the first PMI, and then Determining the M second sub-bands in the same manner as the UE, that is, the number of the first sub-bands included in each second sub-band is the same value, so that N
  • the first second sub-band of the five second sub-bands includes sub-band 0 and sub-band 1
  • the second second sub-band includes sub-band 2 and sub-band 3
  • third The second sub-band includes a sub-band 4 and a sub-band 5
  • the fourth second sub-band includes a sub-band 6 and a sub-band 7
  • the fifth second sub-band includes a sub-band 8 and a sub-band 9, wherein each of the sub-bands
  • the frequencies corresponding to the adjacent two first sub-bands in the second sub-band are continuous.
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column permutation.
  • the method further includes: receiving, by the base station, each second sub-band included in the M second sub-bands reported by the UE The number of first sub-bands.
  • the UE may use the M second The number of the first sub-bands included in each of the second sub-bands of the sub-band is reported to the base station.
  • the UE selects, according to the received reference signal sent by the base station, a precoding matrix from a codebook for each first subband of N first subbands in a system transmission bandwidth, where the UE The number of the first sub-bands included in each of the M second sub-bands may be reported to the base station, so that the base station receives the first PMI and the second feedback from the UE.
  • the M second sub-bands are determined from the N first sub-bands in the same manner as the UE, so that the first PMI and the second fed back by the UE are received again.
  • the precoding matrix corresponding to each first subband can be obtained more quickly, which improves work efficiency.
  • the technical solution of the present application is that the base station receives the second PMI and the M second sub-bands corresponding to each of the first sub-bands of the N first sub-bands fed back by the UE.
  • Each of the second sub-bands corresponds to a first PMI
  • N and M are integers not less than 2, such that the base station receives multiple first PMIs
  • one first PMI corresponds to one beam phase change range.
  • the beam phase variation of the entire bandwidth may be covered by multiple first precoding matrices, and when the beam phase changes less, the first precoding matrix can be adopted by multiple first precoding matrices.
  • the beam quantization granularity is improved, and the codebook is matched with the beam phase scene, so that the system performance is improved.
  • the fourteenth embodiment of the present application provides a method for receiving a precoding matrix indication.
  • the specific processing procedure of the method is as follows:
  • Step S501 The base station sends a reference signal to the UE.
  • Step S502 The base station receives, in the system transmission bandwidth that is fed back by the UE, each of the second PMI and the second sub-band corresponding to each of the first sub-bands of the N first sub-bands.
  • a corresponding first PMI wherein the M second sub-bands are determined from the N first sub-bands, and at least one of the M second sub-bands includes at least one second sub-band
  • the base station has a codebook, and the codebook includes at least two precoding matrices, which can be corresponding to each of the second subbands.
  • the first PMI and the second PMI corresponding to each of the first sub-bands select a corresponding pre-coding matrix from the codebook.
  • the base station sends a reference signal to the UE.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the base station may further send the RRC signaling to the UE, where the RRC signaling includes the reference signal, so that the UE can acquire the reference signal based on the received RRC signaling.
  • step S502 is performed, in which the base station receives a second PMI and a second second sub-port corresponding to each of the N first sub-bands in the system transmission bandwidth fed back by the UE.
  • the base station has a codebook, and the codebook includes at least two precoding matrices, A first PMI corresponding to each second subband and a second PMI corresponding to each of the first subbands are selected, and a corresponding precoding matrix is selected from the codebook.
  • the system transmission bandwidth is a system transmission bandwidth of one carrier configured for the channel measurement by the UE, and the N first subbands in the system transmission bandwidth are according to the UE and the base station. Determined as defined in the agreement.
  • the N first sub-bands are all sub-bands or partial sub-bands in the system transmission bandwidth, and the UE and the base station determine the same N first children according to the same manner.
  • the bandwidth of each of the first sub-bands may be the same or different.
  • the UE may divide the system transmission bandwidth into N first sub-bands by means of a uniform halving method or a non-divided manner.
  • the UE can receive the reference signal, and based on the reference signal, from the codebook, the N first subbands.
  • Each of the first sub-bands selects a precoding matrix, each precoding matrix in the codebook is represented by at least a first PMI and a second PMI, and then each of the second subbands corresponds to a first PMI and each a second PMI corresponding to the first sub-band is fed back to the base station, so that the base station can receive the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands And searching for a corresponding precoding matrix from the codebook according to the first PMI corresponding to each of the second subbands and the second PMI corresponding to each of the first subbands.
  • the first PMI feedback corresponding to each second subband is Up to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, such that the base
  • the station receives the first PMI corresponding to each second sub-band fed back by the UE and the second PMI corresponding to each first sub-band, and the following describes that the UE is the N first from the codebook.
  • the specific implementation process of selecting a precoding matrix for each first subband in the subband is as follows:
  • the UE after receiving the reference signal, the UE selects a precoding matrix before selecting a first subband in each of the N first subbands in the system transmission bandwidth from the codebook. And determining, by the N first subbands, the M second subbands, after determining the M second subband, from the codebook, N of system transmission bandwidths Each of the first sub-bands selects a pre-coding matrix, wherein each of the N first sub-bands corresponds to a second PMI, and the M second sub-bands Each of the second sub-bands corresponds to a first PMI, and all of the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one
  • the second sub-band is included, and since each of the M second sub-bands corresponds to a first PMI, all the second sub-bands included in the at least two first sub-bands are included One subband corresponds to the same first PMI.
  • the first PMI corresponding to at least two second sub-bands of the M second sub-bands is different, so that the beam phase change of the system transmission bandwidth can be covered by different first PMIs, thereby reducing the beam phase variation.
  • the system performance loss is such that the quantization granularity accuracy of the beam vector is improved. Further, the first PMI corresponding to at least two of the M second sub-bands is different.
  • the UE when determining the M second sub-bands from the N first sub-bands, the UE first determines, where each second sub-band of the M second sub-bands includes Determining, by the number of one subband, the M second subbands from the N first subbands according to the number of first subbands included in each second subband, where the UE The number of the first sub-bands included in each second sub-band is determined according to the UE feedback manner.
  • the UE when the number of the first sub-bands included in each of the M second sub-bands is determined according to the UE feedback manner, the UE will pre-select each The number of the first sub-bands included in the second sub-band is reported to the base station; the base station determines the M second according to the number of the first sub-bands included in each pre-selected second sub-band Each second sub-band of the sub-band includes a number of first sub-bands, and the number of each second sub-band including the first sub-band is fed back to the UE, such that The UE determines the M second sub-bands from the N first sub-bands according to the number of the first sub-bands in each second sub-band.
  • Each second sub-band includes the same number of first sub-bands as the number of first sub-bands included in each of the pre-selected second sub-bands.
  • the UE determines, according to the system transmission bandwidth that is 10 MHz, that the second sub-band of the pre-selected M second sub-bands includes the number of the first sub-bands.
  • the base station may determine, according to the received 3, 3, 2, and 2, for example, that the number of the first sub-bands in each of the M second sub-bands may be, for example, 3, 3, 2, and 2, 3, 3, 3, 1, 4, 2, 2, and 2, etc., the base station further feeds back the determined number of the second sub-bands including the first sub-band to the
  • the UE is configured to enable the UE to receive, by the base station, each second sub-band to include the number of first sub-bands.
  • the UE may use the continuous bandwidth division manner or the discontinuous bandwidth division manner, thereby
  • the N first sub-bands are divided into the M second sub-bands, and when divided by the continuous bandwidth division manner, the frequency corresponding to the adjacent two first sub-bands in each of the second sub-bands is Continuously; when divided in the discontinuous bandwidth partition manner, at least one of the adjacent two first sub-bands in each of the second sub-bands has a frequency discontinuity.
  • the UE determines, according to the system transmission bandwidth that is 10 MHz, that the second sub-band of the pre-selected M second sub-bands includes the number of the first sub-bands. 3, 2, and 2, and transmitting 3, 3, 2, and 2 to the base station, the base station determining, based on 3, 3, 2, and 2, that each second sub-band includes the number of the first sub-band, for example, 3, 3, 3, and 1, and then send 3, 3, 3, and 1 to the UE, and the UE divides the subband 0 and the subband 1 in a continuous bandwidth manner based on 3, 3, 3, and 1.
  • the first second sub-band includes sub-band 0, sub-band 1 and sub-band 2
  • the second second sub-band includes sub-band sub-band 3, sub-band 4 and sub-band 5
  • the third second sub-band comprises a strip 6, a sub-band 7 and a sub-band 8
  • the fourth second sub-band comprises a sub-band 9, wherein, except for the first second sub-band, there is only one first sub-band
  • the frequencies corresponding to the adjacent two first sub-bands of each of the other three second sub-bands are continuous.
  • each second sub-band includes the number of the first sub-band
  • different UEs are in different environments, and corresponding channel feature parameters such as angle expansion and frequency correlation are used.
  • each of the selected second sub-bands of the pre-selection may include the same or different numbers of the first sub-bands, such that the base station includes each second sub-band according to the pre-selection
  • the number of first sub-bands determines that each second sub-band includes the number of first sub-bands, and each second sub-band includes the number of first sub-bands and each of the pre-selected second
  • the number of the first sub-bands is the same or different, so that the number of the first sub-bands may be the same or different, so that different UEs correspond to the M second sub-bands.
  • Each second sub-band includes the number of the first sub-bands may be the same or different, and the number of the first sub-bands in each of the M second
  • the UE after determining, by the UE, the M second subbands, select a precoding matrix for each of the N subbands from the codebook, and the UE will each second sub Sending a corresponding first PMI to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station can receive the first corresponding to each of the second sub-bands The PMI and the second PMI corresponding to each of the first sub-bands.
  • the first PMI and the second PMI have different time domains or frequency domain granularities, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband.
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the
  • the base station is configured to enable the base station to receive the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands.
  • the UE may send the first PMI and the second PMI to a base station by using a PUCCH or a PUSCH, so that the base station can receive the first corresponding to each of the second sub-bands.
  • the PMI and the second PMI corresponding to each of the first sub-bands.
  • the M second sub-bands are determined from the N first sub-bands in the same manner as the UE.
  • the first W is the first second subband
  • the second ⁇ corresponds to the second second subband
  • so on until the Nth second subband corresponds to ⁇ (!3 ⁇ 4).
  • the UE determines, according to the system transmission bandwidth that is 10 MHz, that the second sub-band of the pre-selected M second sub-bands includes the number of the first sub-bands. 3, 2, and 2, and transmitting 3, 3, 2, and 2 to the base station, the base station determining, based on 3, 3, 2, and 2, that each second sub-band includes the number of the first sub-band, for example, 3, 3, 3, and 1, and then send 3, 3, 3, and 1 to the UE, and the UE and the base station determine the M second sub-bands in the same manner, according to 3, 3 and 1, subband 0, subband 1, subband 2, subband 3, subband 4, subband 5, subband 6, subband 7, subband 8 and subband 9, and thus 4 a second sub-band, the first second sub-band of the four second sub-bands includes sub-band 0, sub-band 1 and sub-band 2, and the second second sub-band includes sub-band sub-band 3, sub-band 4 And a sub-band 5, the third second sub-band comprising
  • the number of determination is also ⁇ to M, and preclude the use of the same UE.
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column permutation.
  • the technical solution of the present application is that the base station receives the second PMI and the M second sub-bands corresponding to each of the first sub-bands of the N first sub-bands fed back by the UE. middle a first PMI corresponding to each second sub-band, and N and M are integers not less than 2, such that the base station receives multiple first PMIs, and one first PMI corresponds to a beam phase change range, such that In a scenario where the beam phase changes greatly, the beam phase variation of the entire bandwidth may be covered by multiple first precoding matrices, and the beam may be improved by multiple first precoding matrices in a scenario where the beam phase changes little. The granularity is quantized, which in turn matches the codebook to the beam phase scene, resulting in improved system performance.
  • the fifteenth embodiment of the present application provides a receiving method of the precoding matrix indication.
  • the specific processing procedure of the method is as follows:
  • Step S501 The base station sends a reference signal to the UE.
  • Step S502 The base station receives, in the system transmission bandwidth that is fed back by the UE, each of the second PMI and the second sub-band corresponding to each of the first sub-bands of the N first sub-bands.
  • a corresponding first PMI wherein the M second sub-bands are determined from the N first sub-bands, and at least one of the M second sub-bands includes at least one second sub-band
  • the base station has a codebook, and the codebook includes at least two precoding matrices, which can be corresponding to each of the second subbands.
  • the first PMI and the second PMI corresponding to each of the first sub-bands select a corresponding pre-coding matrix from the codebook.
  • the base station sends a reference signal to the UE.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the base station may further send the RRC signaling to the UE, where the RRC signaling includes the reference signal, so that the UE can acquire the reference signal based on the received RRC signaling.
  • step S502 is performed, in which the base station receives the second PMI and the M second corresponding to each of the first sub-bands of the N first sub-bands that are fed back by the UE.
  • a first PMI corresponding to each of the second sub-bands, wherein the M second sub-bands are determined from the N first sub-bands, and the M second sub-bands
  • At least one second sub-band includes at least two first sub-bands, N and M are both positive integers of not less than 2.
  • the base station has a codebook, and the codebook includes at least two precoding matrices, which can be The first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands select a corresponding pre-coding matrix from the codebook.
  • the system transmission bandwidth is a system transmission bandwidth of one carrier configured for the channel measurement by the UE, and the N first subbands in the system transmission bandwidth are according to the UE and the base station. Determined as defined in the agreement.
  • the N first sub-bands are all sub-bands or partial sub-bands in the system transmission bandwidth, and the UE and the base station determine the same N first children according to the same manner.
  • the bandwidth of each of the first sub-bands may be the same or different.
  • the UE may divide the system transmission bandwidth into N first sub-bands by means of a uniform halving method or a non-divided manner.
  • the UE can receive the reference signal, and based on the reference signal, from the codebook, the N first subbands.
  • Each of the first sub-bands selects a precoding matrix, each precoding matrix in the codebook is represented by at least a first PMI and a second PMI, and then each of the second subbands corresponds to a first PMI and each a second PMI corresponding to the first sub-band is fed back to the base station, so that the base station can receive the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands And searching for a corresponding precoding matrix from the codebook according to the first PMI corresponding to each of the second subbands and the second PMI corresponding to each of the first subbands.
  • the first PMI feedback corresponding to each second subband is Up to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station receives the first PMI and each of the first sub-bands that are fed back by the UE a sub-band corresponding to the second PMI, which is described in the codebook as being in the N first sub-bands
  • the specific implementation process of selecting a precoding matrix for each first subband is as follows:
  • the UE after receiving the reference signal, the UE selects a precoding matrix before selecting a first subband in each of the N first subbands in the system transmission bandwidth from the codebook. And determining, by the N first subbands, the M second subbands, after determining the M second subband, from the codebook, N of system transmission bandwidths Each of the first sub-bands selects a pre-coding matrix, wherein each of the N first sub-bands corresponds to a second PMI, and the M second sub-bands Each of the second sub-bands corresponds to a first PMI, and all of the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one
  • the second sub-band is included, and since each of the M second sub-bands corresponds to a first PMI, all the second sub-bands included in the at least two first sub-bands are included One subband corresponds to the same first PMI.
  • the first PMI corresponding to at least two second sub-bands of the M second sub-bands is different, so that the beam phase change of the system transmission bandwidth can be covered by different first PMIs, thereby reducing the beam phase variation.
  • the system performance loss is such that the quantization granularity accuracy of the beam vector is improved. Further, the first PMI corresponding to at least two of the M second sub-bands is different.
  • the UE when determining the M second sub-bands from the N first sub-bands, the UE first determines, where each second sub-band of the M second sub-bands includes Determining, by the number of one subband, the M second subbands from the N first subbands according to the number of first subbands included in each second subband, where the UE The number of first sub-bands included in each second sub-band is determined according to the configuration of the base station.
  • the base station may be configured according to the N a subband, configured to configure a number of first subbands included in each of the M second subbands, the base station configuring each of the M second subbands After the number of the first sub-bands included in the second sub-band, the number of the first sub-bands included in each of the M second sub-bands is fed back to the UE, so that the Determining, by the UE, the M second sub-bands from the N first sub-bands according to the number of first sub-bands included in each of the M second sub-bands.
  • the base station may determine, according to the N first sub-bands, the each second sub-sub The number of the first sub-bands is included in the band, for example, the number of the first sub-bands included in each of the M second sub-bands may be the same value, or the M numbers may be used.
  • Each of the second sub-bands includes a first sub-band having a different number or a portion of the same value.
  • the base station is determined according to subband 0, subband 1, subband 2, subband 3, subband 4, subband 5, subband 6, subband 7, subband 8, and subband 9.
  • the number of the first sub-bands included in each of the M second sub-bands is the same value, the number of the first sub-bands included in each second sub-band may be determined.
  • the number of first sub-bands included in each second sub-band may be 2 or 5.
  • the base station determines, according to the configuration manner of the base station, that each second sub-band includes the number of the first sub-band, and sends the number of the first sub-bands of each second sub-band to the UE. And causing, by the UE, each second sub-band fed back by the base station to include the number of the first sub-band, after receiving the second sub-band fed back by the base station, including the number of the first sub-band,
  • the N first sub-bands may be divided into the M second sub-bands by using a continuous bandwidth division manner or a discontinuous bandwidth division manner, where each of the M second sub-bands is divided by the continuous bandwidth division manner.
  • a frequency corresponding to two adjacent first sub-bands in a second sub-band is continuous; when divided in the discontinuous bandwidth partition manner, at least one set of adjacent ones in each of the second sub-bands The frequencies corresponding to the two first sub-bands are not continuous.
  • the base station is determined according to subband 0, subband 1, subband 2, subband 3, subband 4, subband 5, subband 6, subband 7, subband 8, and subband 9.
  • the number of the first sub-bands included in each of the M second sub-bands is the same value, the number of the first sub-bands included in each second sub-band may be determined.
  • the number of the first sub-bands included in each second sub-band may be 2 or 5.
  • the base station will each second sub-band The number of the first sub-bands that are included is 2 is fed back to the UE, and the UE divides according to the continuous bandwidth division manner according to the number of the first sub-bands included in each second sub-band being 2, so that Dividing the N first sub-bands into five second sub-bands, wherein the first one of the five second sub-bands includes sub-band 0 and sub-band 1, second and second The subband includes subband 2 and subband 3, and the third second subband contains Subband 4 and subband 5, fourth fourth subband comprising subband 6 and subband 7, and fifth second subband comprising subband 8 and subband 9, wherein each of said second subbands The frequencies corresponding to the two adjacent first sub-bands are continuous.
  • each second sub-band when determining, according to the configuration manner of the base station, each second sub-band includes the number of the first sub-band, determining, according to the N first sub-bands, each second sub-band includes the first The number of the sub-bands is different, and the values of the corresponding Ns may be the same or different, so that each second sub-band determined by the configuration of the base station includes the number of the first sub-bands, The same or different, further determining that each of the M second sub-bands corresponding to different UEs includes the first sub-bands may be the same or different, and the M corresponding to at least two UEs Each of the second sub-bands includes a different number of first sub-bands.
  • the UE after determining, by the UE, the M second subbands, select a precoding matrix for each of the N subbands from the codebook, and the UE will each second sub Sending a corresponding first PMI to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station can receive the first corresponding to each of the second sub-bands The PMI and the second PMI corresponding to each of the first sub-bands.
  • the first PMI and the second PMI have different time domains or frequency domain granularities, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband.
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the
  • the base station is configured to enable the base station to receive the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands.
  • the UE may send the first PMI and the second PMI to a base station by using a PUCCH or a PUSCH, so that the base station can receive the first PMI and the each corresponding to each of the second sub-bands.
  • the base station can be configured according to the The number of the first PMI fed back by the UE is M, determining that the number of the 1 ⁇ is also M, and determining the M second children from the N first subbands in the same manner as the UE The first one corresponds to the first second sub-band, the second one corresponds to the second second sub-band, and so on, until the Nth second sub-band corresponds to ⁇ (n .
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column permutation.
  • the technical solution of the present application is that the base station receives the second PMI and the M second sub-bands corresponding to each of the first sub-bands of the N first sub-bands fed back by the UE.
  • Each of the second sub-bands corresponds to a first PMI
  • N and M are integers not less than 2, such that the base station receives multiple first PMIs
  • one first PMI corresponds to one beam phase change range.
  • the beam phase variation of the entire bandwidth may be covered by multiple first precoding matrices, and when the beam phase changes less, the first precoding matrix can be adopted by multiple first precoding matrices.
  • the beam quantization granularity is improved, and the codebook is matched with the beam phase scene, so that the system performance is improved.
  • the sixteenth embodiment of the present application provides a receiving method of the precoding matrix indication.
  • the specific processing procedure of the method is as follows:
  • Step S501 The base station sends a reference signal to the UE.
  • Step S502 The base station receives, in the system transmission bandwidth that is fed back by the UE, each of the second PMI and the second sub-band corresponding to each of the first sub-bands of the N first sub-bands.
  • a corresponding first PMI wherein the M second sub-bands are determined from the N first sub-bands, and at least one of the M second sub-bands includes at least one second sub-band
  • the base station has a codebook, and the codebook includes at least two precoding matrices, which can be corresponding to each of the second subbands.
  • the first PMI and the second PMI corresponding to each of the first sub-bands select a corresponding pre-coding matrix from the codebook.
  • the base station sends a reference signal to the UE.
  • the reference signal may include a CSI RS or a DM RS or a CRS.
  • the base station may send downlink control information to the UE by using a physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the base station may further send the RRC signaling to the UE, where the RRC signaling includes the reference signal, so that the UE can acquire the reference signal based on the received RRC signaling.
  • step S502 is performed, in which the base station receives a second PMI and a second second sub-port corresponding to each of the N first sub-bands in the system transmission bandwidth fed back by the UE.
  • a first PMI corresponding to each of the second sub-bands wherein the M second sub-bands are determined from the N first sub-bands, and at least the M second sub-bands
  • the base station has a codebook, and the codebook includes at least two precoding matrices, A first PMI corresponding to each second subband and a second PMI corresponding to each of the first subbands are selected, and a corresponding precoding matrix is selected from the codebook.
  • the system transmission bandwidth is a system transmission bandwidth of one carrier configured for the channel measurement by the UE, and the N first subbands in the system transmission bandwidth are according to the UE and the base station. Determined as defined in the agreement.
  • the N first sub-bands are all sub-bands or partial sub-bands in the system transmission bandwidth, and the UE and the base station determine the same N first children according to the same manner.
  • the bandwidth of each of the first sub-bands may be the same or different.
  • the UE may divide the system transmission bandwidth into N first sub-bands by means of a uniform halving method or a non-divided manner.
  • the UE can receive the reference signal, and based on the reference signal, from the codebook, the N first subbands.
  • Each of the first sub-bands selects a precoding matrix, each precoding matrix in the codebook is represented by at least a first PMI and a second PMI, and then each of the second subbands corresponds to a first PMI and each a second PMI corresponding to the first sub-band is fed back to the base station, so that the base station can receive the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands And searching for a corresponding precoding matrix from the codebook according to the first PMI corresponding to each of the second subbands and the second PMI corresponding to each of the first subbands.
  • the first PMI feedback corresponding to each second subband is Up to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station receives the first PMI and each of the first sub-bands that are fed back by the UE A sub-band corresponding to the second PMI, the following describes a specific implementation process in which the UE selects a precoding matrix for each of the N first subbands from the codebook, as follows:
  • the UE after receiving the reference signal, the UE selects a precoding matrix before selecting a first subband in each of the N first subbands in the system transmission bandwidth from the codebook. And determining, by the N first subbands, the M second subbands, after determining the M second subband, from the codebook, N of system transmission bandwidths Each of the first sub-bands selects a pre-coding matrix, wherein each of the N first sub-bands corresponds to a second PMI, and the M second sub-bands Each of the second sub-bands corresponds to a first PMI, and all of the first sub-bands included in the M second sub-bands are the N first sub-bands, and each of the first sub-bands can only be one
  • the second sub-band is included, and since each of the M second sub-bands corresponds to a first PMI, all the second sub-bands included in the at least two first sub-bands are included One subband corresponds to the same first PMI.
  • the first PMI corresponding to at least two second sub-bands of the M second sub-bands is different, so that the beam phase change of the system transmission bandwidth can be covered by different first PMIs, thereby reducing the beam phase variation.
  • the system performance loss is such that the quantization granularity accuracy of the beam vector is improved. Further, the first PMI corresponding to at least two of the M second sub-bands is different.
  • the UE when determining the M second sub-bands from the N first sub-bands, the UE first determines, where each second sub-band of the M second sub-bands includes The number of one subband, and determining the location from the N first subbands according to the number of first subbands included in each second subband The M second sub-bands are determined, wherein the number of the first sub-bands included in each second sub-band of the UE is determined according to the predefined manner.
  • the UE and the base station are both used.
  • a predefined rule to configure a number of first sub-bands included in each of the M second sub-bands where the predefined rule may be, for example, a first sub-inclusion of each second sub-band
  • the number of bands is the same, or different, or partially the same.
  • the base station and the UE may configure, according to the predefined rule, the number of first subbands included in each of the M second subbands, if
  • the predefined rule is that the number of the first sub-bands included in each second sub-band is the same, and the number of the first sub-bands included in each of the M second sub-bands is, for example, For 3, 3, 2 and 2, 4, 4, 1 and 1 etc.
  • the UE may adopt a continuous bandwidth division manner or a discontinuous bandwidth.
  • a division manner wherein the N first sub-bands are divided into the M second sub-bands, and when divided by the continuous bandwidth division manner, two adjacent ones of the second sub-bands The frequency corresponding to the first sub-bands is continuous; when divided by the non-contiguous bandwidth division manner, at least one of the adjacent two first sub-bands in each of the second sub-bands does not have a frequency corresponding to continuous.
  • the base station and the UE may configure, according to the predefined rule, the number of first subbands included in each of the M second subbands, if The predefined rule is that the number of the first sub-bands included in each second sub-band is the same, and the first sub-bands included in each of the M second sub-bands may be determined.
  • the numbers are, for example, 3, 3, 2, and 2. If the division is performed in the continuous bandwidth division manner, the sub-band 0, sub-band 1, sub-band 2, sub-band 3, sub-band 4, sub-band 5, sub-band 6.
  • Subband 7, subband 8, and subband 9 define four second subbands, such as A subband, B subband, C subband, and D subband, where A The sub-band includes sub-band 0, sub-band 1 and sub-band 2; B sub-band includes sub-band 3, sub-band 4 and sub-band 5; C sub-band includes sub-band 6 and sub-band 7; D sub-band includes sub-band 8 and sub-band 9 Where the phase in each of the second sub-bands The frequencies corresponding to the two adjacent first sub-bands are continuous.
  • the number of the first sub-bands included in the second sub-band in this embodiment is determined according to the predefined manner, different UEs are in different environments, and corresponding channel feature parameters such as angle expansion and frequency correlation are used.
  • the spatial correlation is different, so that the number of the first sub-bands that are determined by the predefined manner may be the same or different, and the M second children corresponding to different UEs may be determined.
  • Each of the second sub-bands in the band may include the same or different numbers of the first sub-bands, and such that each of the M second sub-bands corresponding to at least two UEs includes the first sub-band The number is different.
  • the UE after determining, by the UE, the M second subbands, select a precoding matrix for each of the N subbands from the codebook, and the UE will each second sub Sending a corresponding first PMI to the base station, and feeding back a second PMI corresponding to each first sub-band to the base station, so that the base station can receive the first corresponding to each of the second sub-bands The PMI and the second PMI corresponding to each of the first sub-bands.
  • the first PMI and the second PMI have different time domains or frequency domain granularities, for example, the first PMI corresponds to an entire frequency bandwidth, and the second PMI corresponds to an entire frequency band or a subband.
  • the M first PMIs when the M first PMIs are fed back, the M first PMIs may be encoded by an encoding method such as joint coding or differential coding, and the encoded M first PMIs are fed back to the
  • the base station is configured to enable the base station to receive the first PMI corresponding to each of the second sub-bands and the second PMI corresponding to each of the first sub-bands.
  • the UE may send the first PMI and the second PMI to a base station by using a PUCCH or a PUSCH, so that the base station can receive the first PMI and the each corresponding to each of the second sub-bands.
  • the number of determination is also ⁇ to M, and preclude the use of the same UE Means determining the M second sub-bands from the N first sub-bands, the first pair Should be the first second subband, the second ⁇ corresponds to the second second subband, and so on, until the Nth second subband corresponds to ⁇ (!3 ⁇ 4).
  • the precoding matrix in the embodiment of the present application may be a precoding moment after row or column permutation.
  • the technical solution of the present application is that the base station receives the second PMI and the M second sub-bands corresponding to each of the first sub-bands of the N first sub-bands fed back by the UE.
  • Each of the second sub-bands corresponds to a first PMI
  • N and M are integers not less than 2, such that the base station receives multiple first PMIs
  • one first PMI corresponds to one beam phase change range.
  • the beam phase variation of the entire bandwidth may be covered by multiple first precoding matrices, and when the beam phase changes less, the first precoding matrix can be adopted by multiple first precoding matrices.
  • the beam quantization granularity is improved, and the codebook is matched with the beam phase scene, so that the system performance is improved.
  • the technical solution of the present application is to select a precoding matrix from the codebook based on the received reference signal sent by the base station, and send a precoding matrix indicating PMI corresponding to the precoding matrix to the a base station, wherein the M second subbands are determined from the N first subbands, and a first PMI is fed back for each of the second subbands, so that the plurality of first PMIs are fed back to the base station, and one
  • the first PMI corresponds to a beam phase change range, so that when the beam phase changes greatly, the beam phase change of the entire bandwidth can be covered by multiple first precoding matrices, and in a scenario where the beam phase changes little,
  • the beam quantization granularity can be improved by the plurality of first precoding matrices, thereby matching the codebook with the beam phase scene, so that the system performance is improved.
  • each W ⁇ should be part of the system transmission bandwidth, and each part of the system transmission bandwidth has a corresponding bandwidth W l 7 and M is an integer not less than 2, so that the beam phase variation of the entire system transmission bandwidth is covered by multiple Ws, and the system performance loss is reduced; and since each ⁇ corresponds only to a part of the transmission bandwidth of the system, In turn, the quantized granularity accuracy of the beam vector is improved.
  • Example seventeen Based on the same technical concept as the feedback method indicated by the foregoing precoding matrix, the embodiment of the present invention provides a UE. As shown in FIG. 6, the UE includes:
  • the receiving unit 601 is configured to receive a reference signal sent by the base station
  • the matrix selection unit 602 is configured to receive the reference signal sent by the receiving unit 601, and select, according to the reference signal, a first subband of the N first subbands in the system transmission bandwidth from the codebook.
  • a precoding matrix where the codebook includes at least two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating PMI and a second PMI, where the N first subbands are Each of the first sub-bands corresponds to a second PMI, and each of the M second sub-bands corresponds to a first PMI, and the M second sub-bands are from the N first sub-bands Determining in the band, and at least one second sub-band of the M second sub-bands includes at least two first sub-bands, N and M are positive integers not less than 2;
  • the sending unit 603 is configured to: after the matrix selecting unit 602 selects one precoding matrix for each first subband, feed back a first PMI corresponding to each second subband to the base station, and send each first sub A corresponding second PMI is fed back to the base station.
  • the reference signal received by the receiving unit 601 may include a CSI RS or a DM RS or a CRS.
  • the N first sub-bands are all sub-bands or partial sub-bands in the system transmission bandwidth, and the UE and the base station determine the same N firsts based on the same manner.
  • the sub-bands, where the bandwidth corresponding to each of the first sub-bands may be the same or different.
  • the UE may divide the system transmission bandwidth into N first sub-bands by means of a uniform halving method or a non-divided manner.
  • the UE is further configured to: before the matrix selecting unit 602 selects a precoding matrix from the codebook for each of the N first subbands in the system transmission bandwidth, Determining the M second sub-bands in the N first sub-bands, wherein all the first sub-bands included in the M second sub-bands are the N first sub-bands, and each first The subband can only be included by a second subband, wherein each of the M second subbands corresponds to a first PMI such that at least two first subbands are included All the first sub-bands included in the two sub-bands correspond to the same The first PMI.
  • the UE when the UE determines the M second sub-bands from the N first sub-bands, the UE first determines the value of the M, and according to the value of the M, Determining the M second sub-bands in the N first sub-bands, where the UE may determine the value of the M, according to the UE configuration manner, the UE feedback manner, and the predefined And determining, by the manner in which the base station is configured, and the UE, after determining the value of the M, dividing the N first sub-bands into the M second sub-bands, and because at least one The two sub-bands contain at least two first sub-bands such that the value of the M is less than the value of the N.
  • the UE further includes a first M value determining unit 604, configured to report the value of the preselected M to the base station, when the value of the M is determined by the UE feedback manner. And receiving a value of the M fed back by the base station, the value of the M being determined by the base station based on the value of the pre-selected M.
  • a first M value determining unit 604 configured to report the value of the preselected M to the base station, when the value of the M is determined by the UE feedback manner. And receiving a value of the M fed back by the base station, the value of the M being determined by the base station based on the value of the pre-selected M.
  • the first M value determining unit 604 selects a value of the preselected M, and then reports the value of the preselected M to the base station, where the base station receives the preselected M After the value, the value of the M is determined according to the value of the pre-selected M, and the base station feeds back the determined value of the M to the UE, and further receives the value of the M.
  • the UE further includes a second M value determining unit 605, when determining the value of the M by using the UE configuration manner, to determine a channel estimation based on the reference signal, and then Determining, by the channel estimation and the codebook, a value of the M, wherein a system capacity when selecting the M second subbands is greater than a capacity gain of a system capacity when selecting M-1 second subbands Threshold.
  • a second M value determining unit 605 when determining the value of the M by using the UE configuration manner, to determine a channel estimation based on the reference signal, and then Determining, by the channel estimation and the codebook, a value of the M, wherein a system capacity when selecting the M second subbands is greater than a capacity gain of a system capacity when selecting M-1 second subbands Threshold.
  • the second M value determining unit 605 is specifically configured to determine, according to the channel estimation and the codebook, the value of the M, the threshold value is determined according to an actual situation, and the value of the M is determined. It is not greater than the number of precoding matrices in the codebook. For example, if the number of precoding matrices is 5, the value of the M is at most 5 and the minimum is 2.
  • the UE when the UE determines the M second subbands from the N first subbands, the UE first determines each second subband of the M second subbands. The first sub-band included And determining, according to the number of first subbands included in each second subband, the M second subbands from the N first subbands, where the UE is in each second When the number of the first sub-bands included in the sub-band is determined according to the UE configuration manner, the UE feedback manner, the predefined manner, or the base station configuration manner, and the UE determines each After the number of first sub-bands included in the second sub-band, the M second sub-bands are determined from the N first sub-bands.
  • the UE further includes a first reporting unit 606, configured, by the matrix selecting unit 602, based on the reference signal, from the codebook, each of the N first subbands in the system transmission bandwidth.
  • a first reporting unit 606 configured, by the matrix selecting unit 602, based on the reference signal, from the codebook, each of the N first subbands in the system transmission bandwidth.
  • the subband selects a precoding matrix, the value of the M is reported to the base station.
  • the UE further includes a second reporting unit 607, configured, by the matrix selecting unit, for each of the N first subbands in the system transmission bandwidth from the codebook based on the reference signal.
  • a sub-band selects a pre-coding matrix, the number of the first sub-bands included in each of the M second sub-bands is reported to the base station.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands are configured by the base station.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands are predefined.
  • the value of the M is determined in a predefined manner.
  • the UE and the base station may preset the same value as the foregoing.
  • the value of M may be set to a value of 3, 4, or 5; the UE may further set the value of the M according to the system transmission bandwidth, and the transmission bandwidth of the system is not
  • the value of the M is, for example, 2, 3, and 4, and when the system transmission bandwidth is greater than the 10 MHz, the value of the M is, for example, 3, 4, or 5.
  • the UE and the base station are both used.
  • a predefined rule to configure a number of first sub-bands included in each of the M second sub-bands where the predefined rule may be, for example, a first sub-inclusion of each second sub-band
  • the number of bands is the same, or different, or partially the same.
  • at least two of the M second sub-bands have different first PMIs corresponding to the second sub-bands.
  • each of the M second sub-bands includes a first sub-band that is continuous in frequency or discontinuous in frequency.
  • each precoding matrix in the codebook can be represented as
  • Wi is represented by the first PMI and W 2 is represented by the second PMI.
  • the value of the M is determined according to the channel estimation and the codebook, when different UEs are in different environments, corresponding channel characteristic parameters such as angular extension, frequency correlation, and spatial correlation are different. And/or, when the codebooks are different, the number of second sub-bands corresponding to different UEs may be the same or different, and the values of M corresponding to at least two UEs may be the same or different. .
  • system transmission bandwidths corresponding to different UEs may be the same or different, and the system transmission bandwidth may be divided into N first sub-bands by a uniform halving method or a non-division manner, so that different determinities may be determined.
  • the value of the N corresponding to the UE may be the same or different, and the number of the second sub-bands corresponding to the different UEs may be the same or different.
  • the Each of the M second sub-bands corresponding to the two UEs includes the number of the first sub-bands that are different; and when the two values of the two UEs are the same, and the M values are the same, the Each of the M second sub-bands corresponding to the two UEs may include the same number of the first sub-bands, such that each of the M second sub-bands corresponding to at least two UEs The second sub-band includes the number of first sub-bands that are different or the same.
  • the technical solution of the present application is to select a precoding matrix from the codebook based on the received reference signal sent by the base station, and send a precoding matrix indicating PMI corresponding to the precoding matrix to the a base station, wherein the M second subbands are determined from the N first subbands, and a first PMI is fed back for each of the second subbands, so that the plurality of first PMIs are fed back to the base station, and one
  • the first PMI corresponds to a beam phase change range, so that when the beam phase changes greatly, the beam phase change of the entire bandwidth may be covered by multiple first precoding matrices.
  • the beam quantization granularity can be improved by using the plurality of first precoding matrices, and the codebook and the beam phase scene are matched, so that the system performance is improved.
  • the embodiment of the present invention provides a UE.
  • the UE includes:
  • the receiver 701 is configured to receive a reference signal sent by the base station.
  • the processor 702 is configured to select, according to the reference signal, a precoding matrix from the codebook for each of the N first subbands in the system transmission bandwidth, where the codebook includes at least one Two precoding matrices, and each precoding matrix is represented by at least a first precoding matrix indicating PMI and a second PMI, wherein each of the N first subbands corresponds to a second PMI.
  • Each of the M second sub-bands corresponds to a first PMI, the M second sub-bands are determined from the N first sub-bands, and the M second At least one second sub-band in the sub-band includes at least two first sub-bands, N and M are positive integers not less than 2;
  • the transmitter 703 is configured to feed back a first PMI corresponding to each second sub-band to the base station, and feed back a second PMI corresponding to each first sub-band to the base station.
  • the receiver 701 is, for example, an electronic device such as an antenna.
  • the processor 702 is, for example, a separate processing chip, and may be a processor of the UE.
  • the transmitter 703 is, for example, an electronic device such as an antenna.
  • the reference signal received by the receiver 701 may include a CSI RS or a DM RS or a CRS.
  • the N first sub-bands are all sub-bands or partial sub-bands in the system transmission bandwidth, and the UE and the base station determine the same N firsts based on the same manner.
  • the processor 702 needs to select the N first subbands before selecting a precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook.
  • the band includes, wherein, since each of the M second sub-bands corresponds to a first PMI, all firsts included in the second sub-band including at least two first sub-bands The subbands all correspond to the same first PMI.
  • the UE when the UE determines the M second sub-bands from the N first sub-bands, the UE first determines the value of the M, and according to the value of the M, Determining the M second sub-bands in the N first sub-bands, where the UE may determine the value of the M, according to the UE configuration manner, the UE feedback manner, and the predefined And determining, by the manner in which the base station is configured, and the UE, after determining the value of the M, dividing the N first sub-bands into the M second sub-bands, and because at least one The two sub-bands contain at least two first sub-bands such that the value of the M is less than the value of the N.
  • the UE 703 is further configured to report the value of the pre-selected M to the base station when the UE determines the value of the M by using the feedback mode of the UE.
  • the receiver 701 is also used to Receiving, by the base station, a value of the M, the value of the M being determined by the base station based on a value of the pre-selected M.
  • the processor 702 selects a value of the pre-selected M, and then reports the value of the pre-selected M to the base station by using a transmitter 703, where the base station receives the pre-selected M After the value, the value of the M is determined according to the value of the pre-selected M, and the base station feeds back the determined value of the M to the UE, so that the receiver 701 receives the feedback from the base station.
  • the value of M is the processor 702 selects a value of the pre-selected M, and then reports the value of the pre-selected M to the base station by using a transmitter 703, where the base station receives the pre-selected M After the value, the value of the M is determined according to the value of the pre-selected M, and the base station feeds back the determined value of the M to the UE, so that the receiver 701 receives the feedback from the base station.
  • the value of M is a transmitter 703, where the base station receives the pre-selected M.
  • the processor 702 is specifically configured to determine a channel estimation based on the reference signal, and according to the channel estimation and the code.
  • the value of the M is determined, wherein a system capacity when the M second subbands are selected is greater than a threshold value of a system capacity when the M-1 second subbands are selected.
  • the processor 702 is specifically configured to determine, according to the channel estimation and the codebook, the value of the M, the threshold value is determined according to an actual situation, and the value of the M is not greater than
  • the number of precoding matrices in the codebook for example, the number of the precoding matrices is 5, and the value of the M is The maximum is 5 and the minimum is 2.
  • the UE when the UE determines the M second subbands from the N first subbands, the UE first determines each second subband of the M second subbands. Determining the number of the first sub-bands, and determining the M second sub-bands from the N first sub-bands according to the number of the first sub-bands included in each second sub-band, where And determining, by the UE, the number of the first sub-bands included in each second sub-band, according to the UE configuration manner, the UE feedback manner, the predefined manner, or the base station configuration manner, and After determining the number of first subbands included in each second subband, the UE determines the M second subbands from the N first subbands.
  • the transmitter 703 is configured to, when the processor 702 selects, according to the reference signal, a precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook. And reporting the value of the M to the base station.
  • the transmitter 703 is configured to, when the processor 702 selects, according to the reference signal, a precoding matrix for each first subband of the N first subbands in the system transmission bandwidth from the codebook. And reporting, to the base station, the number of the first sub-bands included in each of the M second sub-bands.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands are configured by the base station.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands are predefined.
  • the value of the M is determined in a predefined manner.
  • the UE and the base station may preset the same value as the foregoing.
  • the value of M may be set to a value of 3, 4, or 5; the UE may further set the value of the M according to the system transmission bandwidth, and the transmission bandwidth of the system is not
  • the value of the M is, for example, 2, 3, and 4, and when the system transmission bandwidth is greater than the 10 MHz, the value of the M is, for example, 3, 4, or 5.
  • Predefined rules come Configuring a number of the first sub-bands included in each of the M second sub-bands, where the predefined rule may be, for example, the number of the first sub-bands included in each second sub-band All are the same, or are all different, or partially the same.
  • At least two of the M second sub-bands have different first PMIs corresponding to the second sub-bands.
  • each of the M second sub-bands includes a first sub-band that is continuous in frequency or discontinuous in frequency.
  • each precoding matrix in the codebook can be represented as
  • Wi is represented by the first PMI and W 2 is represented by the second PMI.
  • the value of the M is determined according to the channel estimation and the codebook, when different UEs are in different environments, corresponding channel characteristic parameters such as angular extension, frequency correlation, and spatial correlation are different. And/or, when the codebooks are different, the number of second sub-bands corresponding to different UEs may be the same or different, and the values of M corresponding to at least two UEs may be the same or different. .
  • system transmission bandwidths corresponding to different UEs may be the same or different, and the system transmission bandwidth may be divided into N first sub-bands by a uniform halving method or a non-division manner, so that different determinities may be determined.
  • the value of the N corresponding to the UE may be the same or different, and the number of the second sub-bands corresponding to the different UEs may be the same or different.
  • the Each of the M second sub-bands corresponding to the two UEs includes the number of the first sub-bands that are different; and when the two values of the two UEs are the same, and the M values are the same, the Each of the M second sub-bands corresponding to the two UEs may include the same number of the first sub-bands, such that each of the M second sub-bands corresponding to at least two UEs The second sub-band includes the number of first sub-bands that are different or the same.
  • the technical solution of the present application is to select a precoding matrix from the codebook based on the received reference signal sent by the base station, and send a precoding matrix indicating PMI corresponding to the precoding matrix to the Base station, since M second sub-bands are determined from N first sub-bands, And feeding back a first PMI for each second sub-band, so that a plurality of first PMIs are fed back to the base station, and a first PMI corresponds to a beam phase change range, so that when the beam phase changes greatly,
  • the beam phase variation of the entire bandwidth may be covered by multiple first precoding matrices, and the beam quantization granularity may be improved by multiple first precoding matrices in a scene with a small beam phase variation, thereby making the codebook and the beam Phase scenes are matched to improve system performance.
  • the embodiment of the present invention provides a base station.
  • the base station includes:
  • the sending unit 801 is configured to send a reference signal to the UE.
  • the receiving unit 802 is configured to receive, according to each of the N first subbands of the system transmission bandwidth that is fed back by the UE, a second PMI and a second second subband corresponding to each of the first subbands.
  • a corresponding first PMI wherein the M second sub-bands are determined from the N first sub-bands, and at least one of the M second sub-bands includes at least one second sub-band
  • the base station has a codebook, and the code includes at least two precoding matrices, according to the second sub-band corresponding to each A PMI and a second PMI corresponding to each of the first sub-bands select a corresponding pre-coding matrix from the codebook.
  • the sending unit 801 may send the downlink control information to the UE by using the physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the eNB may also send the RRC signaling to the UE, where the RRC signaling includes the reference signal, so that the UE can acquire the reference signal based on the received RRC signaling.
  • the UE can receive the reference signal, and based on the reference signal, from the codebook, each of the N first subbands.
  • the first subband selects a precoding matrix, each precoding matrix in the codebook is represented by at least a first PMI and a second PMI, and then each first subband corresponds to a first PMI and each first
  • the second PMI corresponding to the subband is fed back to the sending unit 802, so that the sending unit 802 can receive the first PMI corresponding to each of the second subbands and the second PMI corresponding to each of the first subbands,
  • the base station searches for a corresponding precoding matrix from the codebook according to the first PMI corresponding to each of the second subbands and the second PMI corresponding to each of the first subbands.
  • the N first sub-bands are all sub-bands or partial sub-bands in the system transmission bandwidth, and the UE and the base station determine the same N firsts based on the same manner.
  • the receiving unit 802 is further configured to receive the value of the pre-selected M reported by the UE.
  • the base station further includes an M value determining unit 803, configured to receive the pre-selected M sent by the receiving unit 802. a value, based on the value of the pre-selected M, determining the value of the M.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands are configured by the base station.
  • the receiving unit 802 is further configured to: after the base station sends the reference signal to the UE, receive the first sub-band included in each of the M second sub-bands reported by the UE. Number.
  • the receiving unit 802 is further configured to: after the base station sends the reference signal to the UE, receive the value of the M reported by the UE.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands are predefined.
  • the value of the M is determined in a predefined manner.
  • the UE and the base station may preset the same value as the foregoing.
  • the value of M may be set to a value of 3, 4, or 5; the UE may further set the value of the M according to the system transmission bandwidth, and the transmission bandwidth of the system is not
  • the value of the M is, for example, 2, 3, and 4, and when the system transmission bandwidth is greater than the 10 MHz, the value of the M is, for example, 3, 4, or 5.
  • the UE and the base station are both used.
  • the predetermined The meaning rule may be, for example, that the number of the first sub-bands included in each second sub-band is the same, or is different, or partially the same, and the like.
  • At least two of the M second sub-bands have different first PMIs corresponding to the second sub-bands.
  • each of the M second sub-bands includes a first sub-band that is continuous in frequency or discontinuous in frequency.
  • each precoding matrix in the codebook can be represented as
  • Wi is represented by the first PMI and W 2 is represented by the second PMI.
  • the value of the M is determined according to the channel estimation and the codebook, when different UEs are in different environments, corresponding channel characteristic parameters such as angular extension, frequency correlation, and spatial correlation are different. And/or, when the codebooks are different, the number of second sub-bands corresponding to different UEs may be the same or different, and the values of M corresponding to at least two UEs may be the same or different. .
  • system transmission bandwidths corresponding to different UEs may be the same or different, and the system transmission bandwidth may be divided into N first sub-bands by a uniform halving method or a non-division manner, so that different determinities may be determined.
  • the value of the N corresponding to the UE may be the same or different, and the number of the second sub-bands corresponding to the different UEs may be the same or different.
  • the Each of the M second sub-bands corresponding to the two UEs includes the number of the first sub-bands that are different; and when the two values of the two UEs are the same, and the M values are the same, the Each of the M second sub-bands corresponding to the two UEs may include the same number of the first sub-bands, such that each of the M second sub-bands corresponding to at least two UEs The second sub-band includes the number of first sub-bands that are different or the same.
  • the technical solution of the present application is to select a precoding matrix from the codebook based on the received reference signal sent by the base station, and send a precoding matrix indicating PMI corresponding to the precoding matrix to the Base station, since M second sub-bands are determined from N first sub-bands, and a first PMI is fed back for each second sub-band, so that a plurality of first PMIs are fed back to the base a station, and a first PMI corresponds to a beam phase variation range, so that in a scene with a large beam phase change, the beam phase variation of the entire bandwidth can be covered by multiple first precoding matrices, and the beam phase variation is small.
  • the beam quantization granularity can be improved by using multiple first precoding matrices, thereby matching the codebook with the beam phase scene, so that the system performance is improved.
  • the embodiment of the present invention provides a base station.
  • the base station includes:
  • the transmitter 901 is configured to send a reference signal to the UE.
  • the receiver 902 is configured to receive, in the second transmission subband, the second PMI and the second second subband corresponding to each of the N first subbands a corresponding first PMI, wherein the M second sub-bands are determined from the N first sub-bands, and at least one of the M second sub-bands includes at least one second sub-band Two first sub-bands, N and M are positive integers not less than 2;
  • a memory 903 configured to store a codebook, where the codebook includes at least two precoding matrices
  • a processor 904 configured to: according to the first PMI corresponding to each of the second subbands, and each of the first subbands Corresponding second PMI, selecting a corresponding precoding matrix from the codebook.
  • the transmitter 901 is, for example, an electronic device such as an antenna. Further, the receiver 902 is, for example, an electronic device such as an antenna.
  • the memory 903 is, for example, an electronic device such as a memory or a hard disk.
  • the processor 904 is, for example, a separate processing chip, and may be a processor of the UE.
  • the transmitter 901 can send the downlink control information to the UE through the physical downlink control channel, so that the UE can receive the downlink control information, and obtain the reference signal according to the downlink control information.
  • the base station may further send the RRC signaling to the UE, where the RRC signaling includes the reference signal, so that the UE can acquire the reference signal based on the received RRC signaling.
  • the UE can receive the reference signal, and based on the reference signal, from the codebook, each of the N first subbands.
  • the first subband selects a precoding matrix, and each precoding matrix in the codebook is at least first
  • the PMI and the second PMI indicate, and then feed the first PMI corresponding to each second sub-band and the second PMI corresponding to each first sub-band to the sending unit 802, so that the sending unit 802 can receive each of the second a first PMI corresponding to the subband and a second PMI corresponding to each of the first subbands, thereby causing the base station to associate the first PMI and each of the first subbands corresponding to each of the second subbands Corresponding second PMI, searching for a corresponding precoding matrix from the codebook.
  • the N first sub-bands are all sub-bands or partial sub-bands in the system transmission bandwidth, and the UE and the base station determine the same N firsts based on the same manner.
  • the receiver 902 is further configured to receive a value of the pre-selected M reported by the UE, and the processor 904 is further configured to determine the value of the M according to the value of the pre-selected M.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands are configured by the base station.
  • the receiver 902 is further configured to: after the transmitter 901 sends the reference signal to the UE, receive the value of the M reported by the UE.
  • the receiver 902 is further configured to: after the transmitter 901 sends the reference signal to the UE, receive the first subband included in each of the M second subbands reported by the UE. Number.
  • the value of the M and/or the number of the first sub-bands included in each of the M second sub-bands are predefined.
  • the value of the M is determined in a predefined manner.
  • the UE and the base station may preset the same value as the foregoing.
  • the value of M may be set to a value of 3, 4, or 5; the UE may further set the value of the M according to the system transmission bandwidth, and the transmission bandwidth of the system is not
  • the value of the M is, for example, 2, 3, and 4, and when the system transmission bandwidth is greater than the 10 MHz, the value of the M is, for example, 3, 4, or 5.
  • the UE and the base station are both used.
  • a predefined rule to configure a number of first sub-bands included in each of the M second sub-bands, where the predefined rule may be, for example, a first sub-inclusion of each second sub-band
  • the number of bands is the same, or different, or partially the same.
  • At least two of the M second sub-bands have different first PMIs corresponding to the second sub-bands.
  • each of the M second sub-bands includes a first sub-band that is continuous in frequency or discontinuous in frequency.
  • each precoding matrix in the codebook can be represented as
  • Wi is represented by the first PMI and W 2 is represented by the second PMI.
  • the value of the M is determined according to the channel estimation and the codebook, when different UEs are in different environments, corresponding channel characteristic parameters such as angular extension, frequency correlation, and spatial correlation are different. And/or, when the codebooks are different, the number of second sub-bands corresponding to different UEs may be the same or different, and the values of M corresponding to at least two UEs may be the same or different. .
  • system transmission bandwidths corresponding to different UEs may be the same or different, and the system transmission bandwidth may be divided into N first sub-bands by a uniform halving method or a non-division manner, so that different determinities may be determined.
  • the value of the N corresponding to the UE may be the same or different, and the number of the second sub-bands corresponding to the different UEs may be the same or different.
  • the Each of the M second sub-bands corresponding to the two UEs includes the number of the first sub-bands that are different; and when the two values of the two UEs are the same, and the M values are the same, the Each of the M second sub-bands corresponding to the two UEs may include the same number of the first sub-bands, such that each of the M second sub-bands corresponding to at least two UEs The second sub-band includes the number of first sub-bands that are different or the same.
  • the technical solution of the present application is based on the received reference sent by the base station. a signal, selecting a precoding matrix from the codebook, and transmitting a precoding matrix indicating PMI corresponding to the precoding matrix to the base station, where the M second subbands are determined from the N first subbands And feeding back a first PMI for each second sub-band, so that multiple first PMIs are fed back to the base station, and one first PMI corresponds to one beam phase change range, so that when the beam phase changes greatly
  • the beam phase variation of the entire bandwidth may be covered by multiple first precoding matrices, and the beam quantization granularity may be improved by multiple first precoding matrices in a scene with a small beam phase variation, thereby making the codebook and The scenes of the beam phase are matched to improve system performance.
  • embodiments of the present invention can be provided as a method, apparatus (device), or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
  • a computer-usable storage medium including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

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Abstract

本发明实施例公开了一种预编码矩阵指示的反馈方法、接收方法及装置,用户设备UE接收基站发送的参考信号;所述UE基于所述参考信号,从码本中为系统传输带宽中的N个第一子带中的每个第一子带选择一个预编码矩阵,其中,所述码本至少包含两个预编码矩阵,且每个预编码矩阵至少由第一预编码矩阵指示PMI和第二PMI表示,其中,所述N个第一子带中的每一个第一子带对应一个第二PMI,M个第二子带中的每一个第二子带对应一个第一PMI;所述UE将每一个第二子带对应的第一PMI反馈至所述基站,以及将每一个第一子带对应的第二PMI反馈至所述基站。

Description

预编码矩阵指示的反馈方法、 接收方法及装置
技术领域 本发明涉及无线通信领域, 具体涉及一种预编码矩阵指示的反馈方法、 接收方法及装置。 背景技术
基于码本的预编码方法是在收发端预先存储一个码本 (即预编码矩阵的集 合), 接收端根据当前的信道状态以某种准则选择最好的预编码矩阵, 将预编 码矩阵指示 (preceding matrix indicator, 简称 PMI)反馈回发射端, 由于其反馈 量小, 有较好的兼容性, 在无线通信领域进行了广泛的应用。
现有的 3GPP LTE R10系统针对 8天线釆用的码本中的每一个预编码可以 表示为 = \ \¥2,其中, λ 用于表征宽带 /长期信道特性且由第一 PMI表示, W2 为用于表征子带 /短期信道特性且由第二 PMI表示, 在秩为 1和 2时, λ 是由 4 列连续的波束向量组成, 相邻波束向量之间的间距为 , 因此, 8Tx双码本 中, \ 覆盖的波束相位变化范围为: .4 = , 在波束相位变化较大的场景
32 4
时, ^不能覆盖整个带宽的波束相位变化, 使得系统性能损失较大。
进一步的, 现有的 3GPP LTE R12系统针对 4天线秩为 1和 2的码本同样也 釆用的双码本结构,码本中每个预编码矩阵可以表示为 W = W,W2,其中, 是 由 4列大间距的波束向量组成, 相邻波束向量之间的间距为 , W完全覆 盖了 0 ~ 2 r的波束变化范围, 但是相邻波束之间的最小颗粒度为 , 使得波束
2
量化颗粒度较差, 同样使得系统性能损失较大。
综上所述, 现有技术中在波束相位变化较大的场景时, ^不能覆盖整个 带宽的波束相位变化, 而在波束相位变化较小的场景时, 波束量化颗粒度较 差, 均会使得系统性能降低, 如此, 使得现有技术中的码本与波束相位的场 景不匹配, 降 ^了系统性能。 发明内容
本申请实施例通过提供一种预编码矩阵指示的反馈方法、 接收方法及装 置, 能够使得码本与波束相位变化的场景相匹配, 使得系统性能得以提高。
根据本发明的第一方面,提供了一种用户设备( user equipment,简称 UE ), 所述 UE包括:
接收单元, 用于接收基站发送的参考信号;
矩阵选择单元, 用于接收所述接收单元发送的所述参考信号, 基于所述 参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选 择一个预编码矩阵, 其中, 所述码本至少包含两个预编码矩阵, 且每个预编 码矩阵至少由第一预编码矩阵指示 PMI和第二 PMI表示, 其中, 所述 N个第 一子带中的每一个第一子带对应一个第二 PMI, M个第二子带中的每一个第 二子带对应一个第一 PMI,所述 M个第二子带是从所述 N个第一子带中确定 的, 且所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数;
发送单元, 用于在所述矩阵选择单元为每个第一子带选择一个预编码矩 阵之后, 将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每一个 第一子带对应的第二 PMI反馈至所述基站。
结合第一方面, 在第一种可能的实现方式中, 所述 N个第一子带为所述 系统传输带宽中的一个载波上的所有子带或者部分子带。
结合第一方面,在第二种可能的实现方式中, 所述 UE还包括第一上报单 元, 用于在所述矩阵选择单元基于所述参考信号, 从码本中为系统传输带宽 中的 N个第一子带中的每个第一子带选择一个预编码矩阵时,将所述 M的值 上报给所述基站。
结合第一方面, 在第三种可能的实现方式中, 所述 UE还包括第一 M值 确定单元, 用于将预选择的 M的值上报给所述基站, 并接收所述基站反馈的 所述 M的值, 所述 M的值是所述基站基于所述预选择的 M的值来确定的。 结合第一方面, 在第四种可能的实现方式中, 所述 M的值和 /或所 M个 第二子带中的每个第二子带包含的第一子带的个数是所述基站配置的。
结合第一方面,在第五种可能的实现方式中, 所述 UE还包括第二上报单 元, 用于在所述矩阵选择单元基于所述参考信号, 从码本中为系统传输带宽 中的 N个第一子带中的每个第一子带选择一个预编码矩阵时, 将所述 M个第 二子带中每个第二子带包含的第一子带的个数上报给所述基站。
结合第一方面, 在第六种可能的实现方式中, 所述 M的值和 /或所述 M 个第二子带中的每个第二子带包含的第一子带的个数是预定义的。
结合第一方面, 在第七种可能的实现方式中, 所述 UE还包括第二 M值 确定单元, 用于基于所述参考信号, 确定信道估计, 再根据所述信道估计及 所述码本, 确定所述 M的值, 其中, 选择所述 M个第二子带时的系统容量比 选择 M-1个第二子带时的系统容量的容量增益大于门限值。
结合第一方面或第一种至第七种可能的实现方式中的任一种实现方式, 在第八种可能的实现方式中, 所述 M个第二子带中至少有二个第二子带所对 应的第一 PMI不相同。
结合第一方面或第一种至第八种可能的实现方式中的任一种实现方式, 在第九种可能的实现方式中, 所述 M个第二子带中的每一个第二子带包含的 第一子带是频率连续或者频率不连续。
结合第一方面或第一种至第九种可能的实现方式中的任一种实现方式, 在第十种可能的实现方式中, 所述码本中的每个预编码矩阵可以表示为
w = \ w2
其中, Wi由所述第一 PMI表示, W2由所述第二 PMI表示。
结合第一方面或第一种至第十种可能的实现方式中的任一种实现方式, 在第十一种可能的实现方式中, 至少有两个 UE对应的 M的值不相同。
结合第一方面或第一种至第十一种可能的实现方式中的任一种实现方 式, 在第十二种可能的实现方式中, 至少有两个 UE对应的 M个第二子带中 每个第二子带包含第一子带的个数不相同。
根据本发明的第二方面, 提供了一种基站, 所述基站包括:
发送单元, 用于向 UE发送参考信号;
接收单元, 用于接收所述 UE反馈的系统传输带宽中的 N个第一子带中 的每一个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带对应 的第一 PMI, 其中, 所述 M个第二子带是从所述 N个第一子带中确定的, 且 所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M 均为不小于 2的正整数, 所述基站具有一码本, 所述码至少包含两个预编码 矩阵, 根据所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应 的第二 PMI, 从所述码本中选择对应的预编码矩阵。
结合第二方面, 在第一种可能的实现方式中, 所述 N个第一子带为所述 系统传输带宽中的一个载波上的所有子带或者部分子带。
结合第二方面, 在第二种可能的实现方式中, 所述接收单元, 还用于在 所述基站向 UE发送参考信号之后, 接收所述 UE上报的所述 M的值。
结合第二方面, 在第三种可能的实现方式中, 所述接收单元, 还用于接 收所述 UE上报的预选择的 M的值; 所述基站还包括 M值确定单元, 用于接 收所述接收单元发送的所述预选择的 M的值,根据所述预选择的 M的值,确 定所述 M的值。
结合第二方面, 在第四种可能的实现方式中, 所述 M的值和 /或所 M个 第二子带中的每个第二子带包含的第一子带的个数是所述基站配置的。
结合第二方面, 在第五种可能的实现方式中, 所述接收单元, 还用于在 所述基站向 UE发送参考信号之后, 接收所述 UE上报的所述 M个第二子带 中每个第二子带包含的第一子带的个数。
结合第二方面, 在第六种可能的实现方式中, 所述 M的值和 /或所述 M 个第二子带中的每个第二子带包含的第一子带的个数是预定义的。
结合第二方面或第一种至第六种可能的实现方式中的任一种, 在第七种 可能的实现方式中, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相同。
结合第二方面或第一种至第七种可能的实现方式中的任一种实现方式, 在第八种可能的实现方式中, 所述 M个第二子带中的每一个第二子带包含的 第一子带是频率连续或者频率不连续。
结合第二方面或第一种至第八种可能的实现方式中的任一种实现方式, 在第九种可能的实现方式中, 所述码本中的每个预编码矩阵可以表示为
W = \ W2
其中, Wi由所述第一 PMI表示, W2由所述第二 PMI表示。
结合第二方面或第一种至第九种可能的实现方式中的任一种实现方式, 在第十种可能的实现方式中, 至少有两个 UE对应的 M的值不相同。
结合第二方面或第一种至第十种可能的实现方式中的任一种实现方式, 在第十一种可能的实现方式中, 至少有两个 UE对应的 M个第二子带中每个 第二子带包含第一子带的个数不相同。
根据本发明的第三方面, 提供了一种预编码矩阵指示的反馈方法, 其特 征在于, 所述方法包括:
用户设备 UE接收基站发送的参考信号;
所述 UE基于所述参考信号, 从码本中为系统传输带宽中的 N个第一子 带中的每个第一子带选择一个预编码矩阵, 其中, 所述码本至少包含两个预 编码矩阵, 且每个预编码矩阵至少由第一预编码矩阵指示 PMI和第二 PMI表 示, 其中, 所述 N个第一子带中的每一个第一子带对应一个第二 PMI, M个 第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二子带是从所 述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个第二子带包 含至少二个第一子带, N和 M均为不小于 2的正整数;
所述 UE将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每 一个第一子带对应的第二 PMI反馈至所述基站。
结合第三方面, 在第一种可能的实现方式中, 所述 N个第一子带为所述 系统传输带宽中的一个载波上的所有子带或者部分子带。 结合第三方面,在第二种可能的实现方式中,所述 UE基于所述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编 码矩阵时, 所述方法还包括: 所述 UE将所述 M的值上报给所述基站。
结合第三方面, 在第三种可能的实现方式中, 所述 M的值的确定步骤, 具体包括: 所述 UE将预选择的 M的值上报给所述基站; 所述 UE接收所述 基站反馈的所述 M的值, 所述 M的值是所述基站基于所述预选择的 M的值 来确定的。
结合第三方面, 在第四种可能的实现方式中, 所述 M的值和 /或所述 M 个第二子带中的每个第二子带包含的第一子带的个数是所述基站配置的。
结合第三方面,在第五种可能的实现方式中,所述 UE基于所述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编 码矩阵时, 所述方法还包括: 所述 UE将所述 M个第二子带中每个第二子带 包含的第一子带的个数上报给所述基站。
结合第三方面, 在第六种可能的实现方式中, 所述 M的值和 /或所述 M 个第二子带中的每个第二子带包含的第一子带的个数是预定义的。
结合第三方面, 在第七种可能的实现方式中, 所述 M的值的确定步骤, 具体包括: 所述 UE基于所述参考信号, 确定信道估计; 所述 UE根据所述信 道估计及所述码本, 确定所述 M的值, 其中, 选择所述 M个第二子带时的系 统容量比选择 M-1个第二子带时的系统容量的容量增益大于门限值。
结合第三方面或第一种至第七种可能的实现方式中的任一种实现方式, 在第八种可能的实现方式中, 所述 M个第二子带中至少有二个第二子带所对 应的第一 PMI不相同。
结合第三方面或第一种至第八种可能的实现方式中的任一种实现方式, 在第九种可能的实现方式中, 所述 M个第二子带中的每一个第二子带包含的 第一子带是频率连续或者频率不连续。
结合第三方面或第一种至第九种可能的实现方式中的任一种实现方式, 在第十种可能的实现方式中, 所述码本中的每个预编码矩阵可以表示为 W = \ W2
其中, Wi由所述第一 PMI表示, W2由所述第二 PMI表示。
结合第三方面或第一种至第十种可能的实现方式中的任一种实现方式, 在第十一种可能的实现方式中, 至少有两个 UE对应的 M的值不相同。
结合第三方面或第一种至第十一种可能的实现方式中的任一种实现方 式, 在第十二种可能的实现方式中, 至少有两个 UE对应的 M个第二子带中 每个第二子带包含第一子带的个数不相同。
根据本发明的第四方面, 提供了一种预编码矩阵指示的接收方法, 所述 方法包括:
基站向 UE发送参考信号;
所述基站接收所述 UE反馈的系统传输带宽中的 N个第一子带中的每一 个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带对应的第一 PMI, 其中, 所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M 个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不 小于 2的正整数, 所述基站具有一码本, 所述码本至少包含两个预编码矩阵, 能够根据所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的 第二 PMI, 从所述码本中选择对应的预编码矩阵。
结合第四方面, 在第一种可能的实现方式中, 所述 N个第一子带为所述 系统传输带宽中的一个载波上的所有子带或者部分子带。
结合第四方面,在第二种可能的实现方式中,在所述基站向 UE发送参考 信号之后, 所述方法还包括: 所述基站接收所述 UE上报的所述 M的值。
结合第四方面, 在第三种可能的实现方式中, 所述 M的值的确定步骤, 具体包括: 所述基站接收所述 UE上报的预选择的 M的值; 所述基站根据所 述预选择的 M的值, 确定所述 M的值。
结合第四方面, 在第四种可能的实现方式中, 所述 M的值和 /或所 M个 第二子带中的每个第二子带包含的第一子带的个数是所述基站配置的。
结合第四方面,在第五种可能的实现方式中,在所述基站向 UE发送参考 信号之后, 所述方法还包括: 所述基站接收所述 UE上报的所述 M个第二子 带中每个第二子带包含的第一子带的个数。
结合第四方面, 在第六种可能的实现方式中, 所述 M的值和 /或所述 M 个第二子带中的每个第二子带包含的第一子带的个数是预定义的。
结合第四方面或第一种至第六种可能的实现方式中的任一种, 在第七种 可能的实现方式中, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相同。
结合第四方面或第一种至第七种可能的实现方式中的任一种实现方式, 在第八种可能的实现方式中, 所述 M个第二子带中的每一个第二子带包含的 第一子带是频率连续或者频率不连续的。
结合第四方面或第一种至第八种可能的实现方式中的任一种实现方式, 在第九种可能的实现方式中, 所述码本中的每个预编码矩阵可以表示为
W = \ W2
其中, Wi由所述第一 PMI表示, W2由所述第二 PMI表示。
结合第四方面或第一种至第九种可能的实现方式中的任一种实现方式, 在第十种可能的实现方式中, 至少有两个 UE对应的 M的值不相同。
结合第四方面或第一种至第十种可能的实现方式中的任一种实现方式, 在第十一种可能的实现方式中, 至少有两个 UE对应的 M个第二子带中每个 第二子带包含第一子带的个数不相同。
根据本发明的第五方面, 提供了一种 UE, 所述 UE包括:
接收器, 用于接收基站发送的参考信号;
处理器, 用于基于所述参考信号, 从码本中为系统传输带宽中的 N个第 一子带中的每个第一子带选择一个预编码矩阵, 其中, 所述码本至少包含两 个预编码矩阵, 且每个预编码矩阵至少由第一预编码矩阵指示 PMI和第二 PMI表示, 其中, 所述 N个第一子带中的每一个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二子带是 从所述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个第二子 带包含至少二个第一子带, N和 M均为不小于 2的正整数;
发送器, 用于将每一个第二子带对应的第一 PMI反馈至所述基站, 以及 将每一个第一子带对应的第二 PMI反馈至所述基站。
结合第五方面, 在第一种可能的实现方式中, 所述 N个第一子带为所述 系统传输带宽中的一个载波上的所有子带或者部分子带。
结合第五方面, 在第二种可能的实现方式中, 所述发送器, 用于在所述 处理器基于所述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的 每个第一子带选择一个预编码矩阵时, 将所述 M的值上报给所述基站。
结合第五方面, 在第三种可能的实现方式中, 所述发送器, 还用于将预 选择的 M的值上报给所述基站; 所述接收器, 还用于接收所述基站反馈的所 述 M的值, 所述 M的值是所述基站基于所述预选择的 M的值来确定的。
结合第五方面, 在第四种可能的实现方式中, 所述 M的值和 /或所述 M 个第二子带中的每个第二子带包含的第一子带的个数是所述基站配置的。
结合第五方面, 在第五种可能的实现方式中, 所述发送器, 用于在所述 处理器基于所述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的 每个第一子带选择一个预编码矩阵时, 将所述 M个第二子带中每个第二子带 包含的第一子带的个数上报给所述基站。
结合第五方面, 在第六种可能的实现方式中, 所述 M的值和 /或所述 M 个第二子带中的每个第二子带包含的第一子带的个数是预定义的。
结合第五方面, 在第七种可能的实现方式中, 所述处理器, 具体用于基 于所述参考信号, 确定信道估计, 并根据所述信道估计及所述码本, 确定所 述 M的值, 其中, 选择所述 M个第二子带时的系统容量比选择 M-1个第二 子带时的系统容量的容量增益大于门限值。
结合第五方面或第一种至第七种可能的实现方式中的任一种实现方式, 在第八种可能的实现方式中, 所述 M个第二子带中至少有二个第二子带所对 应的第一 PMI不相同。
结合第五方面或第一种至第八种可能的实现方式中的任一种实现方式, 在第九种可能的实现方式中, 所述 M个第二子带中的每一个第二子带包含的 第一子带是频率连续或者频率不连续。
结合第五方面或第一种至第九种可能的实现方式中的任一种实现方式, 在第十种可能的实现方式中, 所述码本中的每个预编码矩阵可以表示为
W = \ W2
其中, Wi由所述第一 PMI表示, W2由所述第二 PMI表示。
结合第五方面或第一种至第十种可能的实现方式中的任一种实现方式, 在第十一种可能的实现方式中, 至少有两个 UE对应的 M的值不相同。
结合第五方面或第一种至第十一种可能的实现方式中的任一种实现方 式, 在第十二种可能的实现方式中, 至少有两个 UE对应的 M个第二子带中 每个第二子带包含第一子带的个数不相同。
根据本发明的第六方面, 提供了一种基站, 所述基站包括:
发送器, 用于向 UE发送参考信号;
接收器, 用于接收所述 UE反馈的系统传输带宽中的 N个第一子带中的 每一个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带对应的 第一 PMI, 其中, 所述 M个第二子带是从所述 N个第一子带中确定的, 且所 述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均 为不小于 2的正整数;
存储器, 用于存储码本, 所述码本至少包含两个预编码矩阵;
处理器, 用于根据所述每一个第二子带对应的第一 PMI和所述每一个第 一子带对应的第二 PMI, 从所述码本中选择对应的预编码矩阵。
结合第六方面, 在第一种可能的实现方式中, 所述 N个第一子带为所述 系统传输带宽中的一个载波上的所有子带或者部分子带。
结合第六方面, 在第二种可能的实现方式中, 所述接收器, 还用于在所 述发送器向 UE发送参考信号之后, 接收所述 UE上报的所述 M的值。
结合第六方面, 在第三种可能的实现方式中, 所述接收器, 还用于接收 所述 UE上报的预选择的 M的值; 所述处理器, 还用于根据所述预选择的 M 的值, 确定所述 M的值。
结合第六方面, 在第四种可能的实现方式中, 所述 M的值和 /或所 M个 第二子带中的每个第二子带包含的第一子带的个数是所述基站配置的。
结合第六方面, 在第五种可能的实现方式中, 所述接收器, 还用于在所 述发送器向 UE发送参考信号之后, 接收所述 UE上报的所述 M个第二子带 中每个第二子带包含的第一子带的个数。
结合第六方面, 在第六种可能的实现方式中, 所述 M的值和 /或所述 M 个第二子带中的每个第二子带包含的第一子带的个数是预定义的。
结合第六方面或第一种至第六种可能的实现方式中的任一种, 在第七种 可能的实现方式中, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相同。
结合第六方面或第一种至第七种可能的实现方式中的任一种实现方式, 在第八种可能的实现方式中, 所述 M个第二子带中的每一个第二子带包含的 第一子带是频率连续或者频率不连续的。
结合第六方面或第一种至第八种可能的实现方式中的任一种实现方式, 在第九种可能的实现方式中, 所述码本中的每个预编码矩阵可以表示为
W = \ W2
其中, Wi由所述第一 PMI表示, W2由所述第二 PMI表示。
结合第六方面或第一种至第九种可能的实现方式中的任一种实现方式, 在第十种可能的实现方式中, 至少有两个 UE对应的 M的值不相同。
结合第六方面或第一种至第十种可能的实现方式中的任一种实现方式, 在第十一种可能的实现方式中, 至少有两个 UE对应的 M个第二子带中每个 第二子带包含第一子带的个数不相同。
本发明有益效果如下:
本发明实施例中, 由于本申请技术方案是基于接收到的基站发送的参考 信号, 从码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵 指示 PMI发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一个第二子带反馈一个第一 PMI, 使得将多个第一 PMI反馈给所述基 站, 而每一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较 大的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能够提高波束量 化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。 附图说明
图 1为本发明实施例中预编码矩阵指示的反馈方法的流程图;
图 2为本发明实施例中从 N个第一子带中确定 M个第二子带的第一种结 构图;
图 3为本发明实施例中从 N个第一子带中确定 M个第二子带的第二种结 构图;
图 4为本申请实施例中用户设备与基站交互的结构图;
图 5为本申请实施例中预编码矩阵指示的接收方法的流程图;
图 6为本申请实施例中 UE的第一种结构图;
图 7为本申请实施例中 UE的第二种结构图;
图 8为本申请实施例中基站的第一种结构图;
图 9为本申请实施例中基站的第二种结构图。 具体实施方式
针对现有技术中码本与波束相位的场景不匹配, 系统性能低的技术问题, 本发明实施例这里提出的技术方案是基于接收到的基站发送的参考信号, 从 码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵指示 PMI 发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一 个第二子带反馈一个第一 PMI,且 M为不小于 2的整数,使得将多个第一 PMI 反馈给所述基站, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束 相位变化较大的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波 束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能 够提高波束量化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统 性能得以提高。
下面结合各个附图对本发明实施例技术方案的主要实现原理、 具体实施 方式及其对应能够达到的有益效果进行详细地阐述。
实施例一
本发明实施例提出了一种预编码矩阵指示的反馈方法, 如图 1 所示, 该 方法具体处理过程如下:
步骤 S101 : UE接收基站发送的参考信号;
步骤 S102: 所述 UE基于所述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵, 其中, 所述码本至少 包含两个预编码矩阵, 且每个预编码矩阵至少由第一预编码矩阵指示 PMI和 第二 PMI表示, 其中, 所述 N个第一子带中的每一个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二 子带是从所述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个 第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数;
步骤 S103:所述 UE将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
其中, 在步骤 S101中, UE接收基站发送的参考信号。
在具体实施过程中, 所述参考信号可以包括信道状态信息参考信号 ( channel state information Reference Signal, 简称 CSI RS )或者解调参考信号 ( demodulation RS, 简称 DM RS )或者小区特定的参考信号( cell-specific RS, 简称 CRS )等。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述 UE还可以接收到所述基站发送的无 线资源控制协议( Radio Resource Control, 简称 RRC )信令, 基于所述 RRC 信令, 获取所述参考信号。
接下来执行步骤 S102, 在该步骤中, 所述 UE基于所述参考信号, 从码 本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩 阵, 其中, 所述码本至少包含两个预编码矩阵, 且每个预编码矩阵至少由第 一预编码矩阵指示 PMI和第二 PMI表示, 其中, 所述 N个第一子带中的每一 个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个 第一 PMI, 所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M 个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不 小于 2的正整数。
在具体实施过程中, 所述 UE接收到所述参考信号之后,再基于所述参考 信号, 从所述码本中为所述 N个第一子带中的每个第一子带选择一个预编码 矩阵, 所述码本中的每一个预编码矩阵至少由第一 PMI和第二 PMI表示, 其 中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系统传输 带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基站之间 的协议中所定义的来确定。
具体来讲, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部 分子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第 一子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE 可以通过均勾等分方式或者非等分方式来将所述系统传输带宽分成 N个第一 子带。
例如, 在所述系统传输带宽为 20MHz时, 若 N=4, 所述 UE通过均匀等 分方式来划分所述系统传输带宽, 将 20MHz划分成 4个第一子带, 每一个第 一子带对应的带宽均为 5MHz; 若所述 UE通过非等分方式来划分所述系统传 输带宽, 将 20MHz划分成 4个第一子带, 其中, 所述 4个第一子带例如是第 一个第一子带对应的带宽为 4MHz, 第二个第一子带子对应的带宽为 6MHz, 第三个第一子带子对应的带宽为 3MHz, 第四个第一子带子对应的带宽为为 7M等。 又例如, 在所述系统传输带宽为 10MHz时, 若将 10MHz分为 5个第一 子带, 且每一个第一子带对应的带宽相同, 使得每一个第一子带对应的带宽 为 2MHz, 以及在所述 UE接收到所述参考信号时, 从所述码本中为所述 5个 第一子带中的每个第一子带选择一个预编码矩阵。
例如, 当基站端发射天线数为 8, 且秩为 1时, 所述预编码矩阵具体参见 下表 1。
Figure imgf000016_0001
表 1
/2
其中, " lT,表 1中的 用于表示第一 PMI, ^用于
|l Q 表示第二 PMI,所述 UE接收到所述参考信号之后, 为每一个第二子带选择一 个第一 PMI, 所述第一 PMI的值对应表 1中的 ii, 并为每一个第二子带对应 的第一子带中的每一个第一子带选择一个第二 PMI, 所述第二 PMI的值对应 表 1中的 ^, 其中 ii和 ^与预编码矩阵——对应, 例如 ^ = 0和 i2 = 0, 则对应的 预编码矩阵为 W^。 又例如, 当基站端发射天线数为 4, 且秩为 1时, 所述预编码矩阵具体参 见下表 2。
Figure imgf000016_0002
表 2 其中, ,表 2中的 ii用于表示第一 ΡΜΙ, ^用于表示第二
Figure imgf000017_0001
PMI, 所述 UE接收到所述参考信号之后, 为每一个第二子带选择一个第一 PMI, 所述第一 PMI的值对应表 2中的 并为每一个第二子带对应的第一子 带中的每一个第一子带选择一个第二 PMI,所述第二 PMI的值对应表 1中的 ^, 其中 和 i2与预编码矩阵——对应。
需要说明的是, 本发明适用的发射天线数与秩可以为任意正整数。
具体的,所述 UE从所述表 1或者表 2中选择预编码矩阵的准则可以是信 道容量最大化准则, 吞吐量最大化的准则或者弦距最小化准则等。
具体的, 所述码本中的每个预编码矩阵可以表示为
W = \ · W2 公式 ( 1 ) 其中, Wi由所述第一 PMI表示, W2由所述第二 PMI表示。
具体的, 作为一个实例, 所述 ^的向量矩阵可以表示为:
X(m) 0
Wt (m) = 公式( 2 )
0 X(m)
X(m) 公式( 3 )
Figure imgf000017_0002
其中, N 为 2的冪次, k为整数,
Figure imgf000017_0003
...,!!^为非负整数, P为正整数, 用于表征 中包含了的 P个波束向量, 例如 P=4时, 即每个 中包含了的 4个波束向量。 当 {n^n ...,!!^为连续非负整数时, 则对应的 P个波束向量为 连续, 当 {ιη, 为非连续非负整数时, 对应的 Ρ歌波束向量为非连续。
具体的, 当秩为 1, 所述 W7可以表示为: w2 = 公式(4 )
Figure imgf000017_0004
其中, n = eI, n e {0,l,' - ',M— 1} , M为 2的养次, 例如 M=4, Υ Υ2为 P xl 维的列选择向量, 例如, 当 P=4 时, Y Y
Figure imgf000018_0001
进一步的, 由于每一个第二子带均单独对应一个第一 ΡΜΙ, 而每一个第 一 ΡΜΙ对应一个 如此, 使得每一个第二子带都单独对应一个 使得 A 子带对应 , B子带对应^2, C子带对应^3, 以及 D子带对应^4, 其中 A、 B、 C、 D都为第二子带, 由于每一个 ^中均包含 P个连续或者不连续的 波束向量, 使得每一个第二子带均具有 P个连续或者不连续的波束向量, 进 而使得波束向量的量化颗粒度精度得以提高。
具体来讲, 在所述 UE从码本中为系统传输带宽中的 N个第一子带中的 每个第一子带选择一个预编码矩阵之前, 还需从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 M个第二子带包含的所有的第一子带为所述 N 个第一子带, 且每一个第一子带仅能够被一个第二子带所包含, 其中, 由于 所述 M个第二子带中的每一个第二子带对应一个第一 PMI, 使得包含有至少 两个第一子带的第二子带中包含的所有第一子带均对应同一个第一 PMI。
具体的, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE 首先确定所述 M的值, 再根据所述 M的值, 从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 UE在确定所述 M的值时, 是根据所述 UE配 置方式来确定的, 例如可以在确定出所述 M的值之后, 将所述 N个第一子带 划分成所述 M个第二子带, 且由于至少存在一个第二子带包含至少两个第一 子带, 使得所述 M的值小于所述 N的值。
具体的, 所述 UE确定所述 M的值的步骤, 具体包括: 所述 UE基于所 述参考信号, 确定信道估计; 所述 UE根据所述信道估计和所述码本, 确定所 述 M的值, 其中, 选择所述 M个第二子带时的系统容量比选择 M-1个第二 子带时的系统容量的容量增益大于门限值, 当然, 还可以是择所述 M个第二 子带比选择 M-l个第二子带时的系统性能增益大于门限值, 所述系统性能包 括系统容量、 系统吞吐量、 系统频谱效率等。
具体的, 所述 UE根据所述信道估计和所述码本, 确定所述 M的值时, 所述门限值才艮据实际情况来确定, 且所述 M的值不大于所述码本中的预编码 矩阵的数量, 例如, 所述预编码矩阵的数量为 5, 则所述 M的值最大为 5, 最 小为 2。
例如, UE选取 2个第二子带时的第一系统容量为 A, 以及获取选取 3 个第二子带所获得的第二系统容量为 B, 以及获取选取 4个第二子带所获得 的第三系统容量为 C, 其中, 所述第二系统容量与所述第一系统容量的第一 差值为 B-A, 所述第一差值即为选择 3个第二子带和选择 2个第二子带的容 量增益, 所述第三系统容量与所述第二系统容量的第二差值为 C-B, 同理, 所述第二差值即为选择 4个第二子带和选择 3个第二子带的容量增益, 若所 述门限值为 D, 若 (B-A≥D, 且若 (C-B)<D, 进而可以确定所述 M为 3, 当若 (C-B)>D, 则继续获取选取 5个第二子带所获得的系统容量与选取 4个第二子 带所获得所述第三系统容量差值是否小于 D, 若小于 D, 则可以确定所述 M 为 4, 若不小于0, 则直至获取到选取 K个第二子带所获得的系统容量与选 择 K-1个第二子带所获取的系统容量的差值小于 D, 若所述 K-1小于所述码 本中的预编码矩阵的数量, 从而可以确定所述 M为 K-l, 若所述 K-1不小于 所述码本中的预编码矩阵的数量, 则将所述预编码矩阵的数量作为所述 M的 值。
在具体实施过程中, 所述 UE在确定所述 M的值之后, 可以通过连续带 宽划分方式或非连续带宽划分方式, 以此来将所述 N个第一子带划分为所述 M个第二子带, 在以所述连续带宽划分方式划分时, 所述每一个第二子带中 的相邻两个第一子带对应的频率是连续的; 在以所述非连续带宽划分方式划 分时, 所述每一个第二子带中的至少存在一组相邻两个第一子带对应的频率 不连续。
当然, 所述 UE也可以在通过所述 UE配置方式确定所述 M的值之前, 就可以确定从所述 N个第一子带中确定所述 M个第二子带的确定方式, 所述 确定方式例如是连续带宽划分方式或非连续带宽划分方式;所述 UE还可以在 确定所述 M的值同时, 确定从所述 N个第一子带中确定所述 M个第二子带 的所述确定方式, 本申请不作具体限制。
由于 M个第二子带对应有 M个第一 PMI, 使得每一个第一 PMI对应所 述系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部分带宽均有 与之对应的第一 PMI,从而使得 M个第一 PMI覆盖系统传输带宽的波束相位 变化, 降低系统性能损失; 而且由于每一个第一 PMI仅对应所述系统传输带 宽中的一部分, 进而使得波束向量的量化颗粒度精度得以提高。
进一步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI 不相同。
例如, 参见图 2, 所述 UE根据所述信道估计和所述码本,确定所述 M的 值为 4之后,在以所述连续带宽划分方式将所述 N个第一子带划分成 M个第 二子带时, 若所述系统传输带宽为 10MHz, 且所述 N个第一子带为子带 0、 子带 1、 子带 2、 子带 3、 子带 4、 子带 5、 子带 6、 子带 7、 子带 8和子带 9, 则从所述 N个第一子带中确定 4个第二子带, 例如所述 4个第二子带为 A子 带、 B子带、 C子带和 D子带, 其中, A子带包含子带 0、 子带 1和子带 2, 且由于 A子带对应第一个第一 PMI, 使得子带 0、 子带 1和子带 2均对应所 述第一个第一 PMI; B子带包含子带 3、 子带 4和子带 5, 由于 B子带对应第 二个第一 PMI, 使得子带 3、 子带 4和子带 5均对应所述第二个第一 PMI; C 子带包含子带 6和子带 7, 由于 C子带对应第三个第一 PMI, 使得子带 6和 子带 7均对应所述第三个第一 PMI; D子带包含子带 8和子带 9, 由于 D子 带对应第四个第一 PMI, 使得子带 8和子带 9均对应所述第四个第一 PMI; 其中, A、 B、 C和 D子带中的每一个第二子带包含的每两个相邻的第一子带 对应的带宽均是连续的。
其中, 由于 A、 B、 C和 D子带为所述 4个第二子带, 且子带 0、 子带 1、 子带 2、 子带 3、 子带 4、 子带 5、 子带 6、 子带 7、 子带 8和子带 9为所述 N 个第一子带,使得所述 UE可以确定所述 4个第二子带中的每个第二子带包含 的第一子带的个数。
又例如, 参见图 3和表 1, 所述 UE根据所述信道估计和所述码本, 确定 所述 M的值为 4之后,在以所述非连续带宽划分方式将所述 N个第一子带划 分成 M个第二子带时, 若所述系统传输带宽为 10MHz, 且所述 N个第一子 带为子带 10、 子带 11、 子带 12、 子带 13、 子带 14、 子带 15、 子带 16、 子带 17、 子带 18和子带 19, 以所述非连续带宽划分方式将所述 N个第一子带划 分成 4个第二子带, 使得所述 4个第二子带为 A1子带、 B1子带、 C1子带和 D1子带, 其中, A1子带包含子带 10、 子带 12和子带 14, B1子带包含子带 11、 子带 13和子带 15, C1子带包含子带 16和子带 18, D1子带包含子带 17 和子带 19, 其中, Al、 Bl、 CI和 D1子带中的每一个第二子带包含的每两个 相邻的第一子带对应的带宽均是不连续的。
其中, 由于 Al、 Bl、 CI和 D1子带为所述 4个第二子带, 且子带 10、 子带 11、 子带 12、 子带 13、 子带 14、 子带 15、 子带 16、 子带 17、 子带 18 和子带 19为所述 N个第一子带, 使得所述 UE可以确定所述 4个第二子带中 的每个第二子带包含的第一子带的个数。
进一步的, 由于每一个第二子带均单独对应一个第一 PMI, 而每一个第 一 PMI对应一个 Wl 7 如此, 使得每一个第二子带都单独对应一个 Wl 7 使得 A1子带对应 W , B1子带对应 , C1子带对应 , 以及 D1子带对应 , 由于每一个 ^中均包含 P个连续或不连续的波束向量, 使得每一个第二子带 均具有 P个连续或不连续的波束向量, 进而使得波束向量的量化颗粒度精度 得以提高。
由于所述 M的值是根据所述信道估计和所述码本来确定, 而当不同的 UE所处环境不同, 对应的信道特征参数例如角度扩展、 频率相关性、 空间相 关性不同, 和 /或, 所述码本不同时, 会使得不同的 UE对应的第二子带的数 量可以相同或不相同, 以及使得至少有两个 UE对应的 M的值可以是相同或 不相同的。
进一步的, 不同的 UE对应的系统传输带宽可以是相同或不同的, 而且可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带, 从而可以确定不同的 UE对应的 N的值是可以相同或不相同的, 且不同 的 UE对应的第二子带的数量可以相同或不同, 在两个 UE对应的 N值相同, 且 M值不同时,使得所述两个 UE对应的 M个第二子带中每个第二子带包含 第一子带的个数是不相同; 而在两个 UE对应的 N值相同, 且 M值相同时, 使得所述两个 UE对应的 M个第二子带中每个第二子带包含第一子带的个数 可以是相同的, 如此, 使得至少有两个 UE对应的 M个第二子带中每个第二 子带包含第一子带的个数是不相同或相同的。
在具体实施过程中, 所述 UE基于所述参考信号,从码本中为系统传输带 宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵时, 所述方法还 包括: 所述 UE将所述 M的值上报给所述基站。
具体来讲, 所述 UE确定所述 M的值之后, 所述 UE将所述 M的值上报 给所述基站, 以使得所述基站能够接收到所述 M的值, 釆用与所述 UE相同 的方式从所述 N个第一子带中确定所述 M个第二子带。
接下来执行步骤 S103, 在该步骤中, 所述 UE将每一个第二子带对应的 第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所 述基站。
在具体实施过程中,所述 UE在通过步骤 S103确定 M个第二子带中的每 一个第二子带对应的第一 PMI, 以及确定所述 N个第一子带中的每一个第一 子带对应的第二 PMI之后, 将每一个第二子带对应的第一 PMI反馈至所述基 站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
具体来讲, 所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗 粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带 或者一个子带。 例如, 参见图 2和表 1, 若子带 0对应的预编码矩阵为 W^ 子带 1对应 的预编码矩阵为 ¾2和子带 2对应的预编码矩阵为 W2( 21,子带 3对应的预编 码矩阵为 W2^3、 子带 4对应的预编码矩阵为 w2 +11和子带 5对应的预编码矩阵 为 w2S+2,3,子带 6对应的预编码矩阵为 和子带 7对应的预编码矩阵为 ¾3, 子带 8对应的预编码矩阵为 和子带 9对应的预编码矩阵为 w^ , 如此, 可以确定子带 0、子带 1和子带 2对应的 ii为 4,即表征 A子带对应的第一 PMI 为 4, 确定子带 3、 子带 4和子带 5对应的 ii为 7, 即表征 B子带对应的第一 PMI为 7,子带 6和子带 7对应的 ii为 9, 即表征 C子带对应的第一 PMI为 9, 子带 8和子带 9对应的 ii为 11, 即表征 D子带对应的第一 PMI为 11。
其中, 将 A子带对应的第一 PMI为 4, B子带对应的第一 PMI为 7 , C 子带对应的第一 PMI为 9, 以及 D子带对应的第一 PMI为 11进行反馈, 还 将子带 0对应的第二 PMI为 0, 子带 1对应的第二 PMI为 2, 子带 2对应的 第二 PMI为 9, 子带 3对应的第二 PMI为 3, 子带 4对应的第二 PMI为 5, 子带 5对应的第二 PMI为 11, 子带 6对应的第二 PMI为 1, 子带 7对应的第 二 PMI为 3, 子带 8对应的第二 PMI为 3, 以及子带 9对应的第二 PMI为 10 进行反馈。
在另一实施例中, 所述 UE可以先 居信道和码本确定所述 M的值和所 述 M个第二子带中的每个第二子带对应的第一 PMI,再确定所述 M个第二子 带中的每个第一子带对应的第二 PMI,然后将每一个第二子带对应的第一 PMI 和每个第一子带对应的第二 PMI反馈给所述基站。
具体来讲, 所述 UE可以先根据信道和码本确定所述 M的值和所述 M个 第二子带中的每个第二子带对应的第一 PMI时, 可以先反馈每个第二子带对 应的第一 PMI, 然后再确定所述 M个第二子带中的每个第一子带对应的第二 PMI之后, 将所述 N个第一子带中的每个第一子带对应的第二 PMI反馈给所 述基站。
例如, 参见图 2, 所述 UE根据所述信道估计和所述码本,确定所述 M的 值为 4以及 4个第二子带中的每个第二子带对应的第一 PMI, 若所述 4个第 二子带为 A子带、 B子带、 C子带和 D子带, 根据所述信道估计和所述码本, 确定 A子带对应的第一 PMI为 4, B子带对应的第一 PMI为 7 , C子带对应 的第一 PMI为 9, 以及 D子带对应的第一 PMI为 11,进而将 A子带、 B子带、 C子带和 D子带中的每个第二子带对应的第二 PMI进行反馈, 然后再确定 A 子带中包含的子带 0对应的第二 PMI为 0、 子带 1对应的第二 PMI为 2和子 带 2对应的第二 PMI为 9; B子带中包含的子带 3对应的第二 PMI为 3、 子 带 4对应的第二 PMI为 5和子带 5对应的第二 PMI为 11 ; 以及 C子带中包 含的子带 6对应的第二 PMI为 1和子带 7对应的第二 PMI为 3; 以及 D子带 中包含的子带 8对应的第二 PMI为 3和子带 9对应的第二 PMI为 10,再将子 带 0-子带 9中的每个第一子带对应的第二 PMI反馈给所述基站。
进一步地, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编 码等编码方式对将所述 M个第一 PMI进行编码, 将编码后的所述 M个第一 PMI反馈给所述基站。
具体的, UE可以通过物理上行控制信道( Physical Uplink Control Channel, 简称 PUCCH )或者物理上行共享信道( Physical Uplink Shared Channel, 简称 PUSCH ) 向基站发送所述第一 PMI和所述第二 PMI。
具体来讲, 由于一个第一 PMI对应一个 Wl 7 且所述基站根据所述 UE 反馈的第一 PMI的数量为 M, 确定所述^的数量也为 M, 并釆用与所述 UE 相同的方式从所述 N个第一子带中确定所述 M个第二子带,第一个 ^对应第 一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N个第 二子带对应 \ (ι¾)。
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。 阵, 且本申请实施例的技术方案能够应用于多输入多输出 ( Multiple-Input Multiple-Output, 简称 MIM0 )无线系统中。
在另一实施例中, UE向基站发送 PMI, 所述 PMI可以是一个具体取值, 此时, 所述 PMI直接指示预编码矩阵, 例如, 共有 256个不同的预编码矩阵, 则可以用 PMI = 0, ..., 255分别指示标号为 0, 1, ...255的编码矩阵, 当 UE 向基站发送的 PMI为 20时,则确定所述预编码矩阵为标号为 20的编码矩阵。
在实际应用过程中, 所述 UE根据接收到的所述基站发送的参考信号,从 码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码 矩阵, 并将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每一个 第一子带对应的第二 PMI反馈至所述基站, 使得所述基站能够基于接收到所 述第一 PMI的数量, 来确定所述 M的值, 在根据所述 M的值, 釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 然后根据所 述 UE反馈的第一 PMI和第二 PMI, 获取到与每一个第一子带对应的预编码 矩阵, 根据获取到的与每一个第一子带对应的预编码矩阵对应的编码方式来 传输数据。
其中, 所述 UE根据接收到的所述基站发送的参考信号,从码本中为系统 传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵时, 所述 UE将所述 M的值上报给所述基站,使得所述基站在接收所述 UE反馈的第一 PMI和第二 PMI之前, 就可以根据所述 M的值, 釆用与所述 UE相同的方式 从所述 N个第一子带中确定所述 M个第二子带, 以使得再接收到所述 UE反 馈的第一 PMI和第二 PMI时, 能够更快的获取到与每一个第一子带对应的预 编码矩阵, 使得工作效率得以提高。
本发明实施例中, 由于本申请技术方案是基于接收到的基站发送的参考 信号, 从码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵 指示 PMI发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一个第二子带反馈一个第一 PMI, 使得将多个第一 PMI反馈给所述基 站, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大 的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能够提高波束量 化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。 另外, 由于 M个第一 PMI和 M个第二子带——对应, 使得每一个第一 PMI对应所述系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部 分带宽均有与之对应的第一 PMI, 且 M为不小于 2的整数, 使得通过多个第 一 PMI来覆盖整个系统传输带宽的波束相位变化, 降低系统性能损失; 而且 由于每一个第一 PMI仅对应所述系统传输带宽中的一部分, 进而使得波束向 量的量化颗粒度精度得以提高。
实施例二
本发明实施例二提出了一种预编码矩阵指示的反馈方法, 如图 1 所示, 该方法具体处理过程如下:
步骤 S101 : UE接收基站发送的参考信号;
步骤 S102: 所述 UE基于所述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵, 其中, 所述码本至少 包含两个预编码矩阵, 且每个预编码矩阵至少由第一预编码矩阵指示 PMI和 第二 PMI表示, 其中, 所述 N个第一子带中的每一个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二 子带是从所述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个 第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数;
步骤 S103:所述 UE将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
其中, 在步骤 S101中, UE接收基站发送的参考信号。
在具体实施过程中,所述参考信号可以包括 CSI RS或者 DM RS或者 CRS 等。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述 UE还可以接收到所述基站发送的 RRC信令, 基于所述 RRC信令, 获取所述参考信号。
接下来执行步骤 S102, 在该步骤中, 所述 UE基于所述参考信号, 从码 本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩 阵, 其中, 所述码本至少包含两个预编码矩阵, 且每个预编码矩阵至少由第 一预编码矩阵指示 PMI和第二 PMI表示, 其中, 所述 N个第一子带中的每一 个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个 第一 PMI, 所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M 个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不 小于 2的正整数。
在具体实施过程中, 所述 UE接收到所述参考信号之后,再基于所述参考 信号, 从所述码本中为所述 N个第一子带中的每个第一子带选择一个预编码 矩阵, 所述码本中的每一个预编码矩阵至少由第一 PMI和第二 PMI表示, 其 中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系统传输 带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基站之间 的协议中所定义的来确定。
具体来讲, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部 分子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第 一子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE 可以通过均勾等分方式或者非等分方式来将所述系统传输带宽分成 N个第一 子带。
具体来讲, 在所述 UE从码本中为系统传输带宽中的 N个第一子带中的 每个第一子带选择一个预编码矩阵之前, 还需从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 M个第二子带包含的所有的第一子带为所述 N 个第一子带, 且每一个第一子带仅能够被一个第二子带所包含, 其中, 由于 所述 M个第二子带中的每一个第二子带对应一个第一 PMI, 使得包含有至少 两个第一子带的第二子带中包含的所有第一子带均对应同一个第一 PMI。
其中,所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相 同, 如此, 可以通过不同的第一 PMI来覆盖系统传输带宽的波束相位变化, 进而降低了系统性能损失, 使得波束向量的量化颗粒度精度得以提高, 进一 步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相同。 具体的, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE 首先确定所述 M的值, 再根据所述 M的值, 从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 UE在确定所述 M的值时, 是根据所述 UE反 馈方式来确定的, 在以所述 UE反馈方式来确定所述 M的值时, 所述 M的值 的确定步骤, 具体包括: 所述 UE将预选择的 M的值上报给所述基站; 所述 UE接收所述基站反馈的所述 M的值, 所述 M的值是所述基站基于所述预选 择的 M的值来确定的。
具体的, 在通过所述 UE反馈方式确定所述 M的值时, 所述 UE会选择 一个所述预选择的 M的值, 然后将所述预选择的 M的值上报给所述基站, 所 述基站接收到所述预选择的 M的值之后,根据所述预选择的 M的值, 确定所 述 M的值, 所述基站将确定的所述 M的值反馈给所述 UE, 使得所述 UE能 够接收到所述 M的值。
具体的, 所述基站根据所述预选择的 M的值, 确定所述 M的值时, 所述 M的值可以为所述预选择的 M的值, 也可以大于或小于所述预选择的 M的 值, 本申请不作具体限制, 例如, 所述基站接收到所述预选择的 M的值为 3, 则所述 M的值可以为 3, 也可以为大于 3的值, 例如为 4、 5等; 还可以为小 于 3的值, 例如为 2等。
例如, 参见图 4, 用户设备首先会确定所述预选择的 M的值, 所述预选 择的 M的值例如为 2、 3、 4等不小于 2的整数, 然后执行步骤 S401, 发送预 选择的 M的值,使得基站能够接收到所述预选择的 M的值,基站接收到所述 预选择的 M的值之后, 执行步骤 S402, 根据所述预选择的 M的值, 确定所 述 M的值,基站在通过步骤 S402确定所述 M的值之后,接着执行步骤 S403, 反馈所述 M的值,使得用户设备能够接收到基站反馈的所述 M的值, 然后基 于所述 M的值, 从所述 N个第一子带中确定所述 M个第二子带, 具体可以 参考上述方式。 连续带宽划分方式或非连续带宽划分方式, 以此来将所述 N个第一子带划分 为所述 M个第二子带, 在以所述连续带宽划分方式划分时, 所述每一个第二 子带中的相邻两个第一子带对应的频率是连续的; 在以所述非连续带宽划分 方式划分时, 所述每一个第二子带中的至少存在一组相邻两个第一子带对应 的频率不连续。 就可以确定从所述 N个第一子带中确定所述 M个第二子带的确定方式, 所述 确定方式例如是连续带宽划分方式或非连续带宽划分方式; 同理, 所述 UE还 可以在确定所述 M的值同时, 确定从所述 N个第一子带中确定所述 M个第 二子带的所述确定方式, 本申请不作具体限制。
例如, 参见图 4和图 2, 当用户设备将所述预选择的 M的值例如为 5发 送给基站, 基站基于所述预选择的 M的值, 确定所述 M的值为 4, 再将 4发 送给用户设备, 使得用户设备确定所述 M的值为 4, 再以所述连续带宽划分 方式来划分所述 N个第一子带, 则从子带 0、 子带 1、 子带 2、 子带 3、 子带 4、 子带 5、 子带 6、 子带 7、 子带 8和子带 9中确定 4个第二子带, 例如所述 4个第二子带为 A子带、 B子带、 C子带和 D子带,其中, A子带包含子带 0、 子带 1和子带 2, B子带包含子带 3、 子带 4和子带 5, C子带包含子带 6和 子带 7, D子带包含子带 8和子带 9, 其中, A、 B、 C和 D子带中的每一个 第二子带包含的每两个相邻的第一子带对应的频率均是连续的。 境不同, 对应的信道特征参数例如角度扩展、 频率相关性、 空间相关性不同, 使得选择的所述预选择的 M的值可以相同或不同, 使得所述基站根据所述预 选择的 M的值确定所述 M的值时,所述 M的值可以为所述预选择的 M的值, 也可以大于或小于所述预选择的 M的值,使得所述 M的值也可以相同或不同, 如此, 使得不同的 UE对应的 M的值可以相同或不相同, 以及使得至少有两 个 UE对应的 M的值也可以相同或不相同。
例如, 第一 UE选择的所述预选择的 M的值为 4, 所述基站根据 4确定 所述 M的值为 3; 第二 UE选择的预选择的 M的值也为 4, 所述基站根据 4 确定与所述第二 UE对应的 M的值可以为 3, 也可以为 4, 使得所述第一 UE 和所述第二 UE对应的 M的值是可以相同或不相同的。
进一步的, 不同的 UE对应的系统传输带宽可以是相同或不同的, 而且可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带, 从而可以确定不同的 UE对应的 N的值是可以相同或不相同的, 且不同 的 UE对应的第二子带的数量可以相同或不同, 在两个 UE对应的 N值相同, 且 M值不同时,使得所述两个 UE对应的 M个第二子带中每个第二子带包含 第一子带的个数是不相同; 而在两个 UE对应的 N值相同, 且 M值相同时, 使得所述两个 UE对应的 M个第二子带中每个第二子带包含第一子带的个数 可以是相同的, 如此, 使得至少有两个 UE对应的 M个第二子带中每个第二 子带包含第一子带的个数是不相同或相同的。
接下来执行步骤 S103, 在该步骤中, 所述 UE将每一个第二子带对应的 第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所 述基站。
在具体实施过程中,所述 UE在通过步骤 S103确定 M个第二子带中的每 一个第二子带对应的第一 PMI, 以及确定所述 N个第一子带中的每一个第一 子带对应的第二 PMI之后, 将每一个第二子带对应的第一 PMI反馈至所述基 站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
具体来讲, 所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗 粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带 或者一个子带。
例如, 参见图 2和表 1, 若子带 0对应的预编码矩阵为 W^ 子带 1对应 的预编码矩阵为 W2^2和子带 2对应的预编码矩阵为 ,子带 3对应的预编 码矩阵为 W2^3、 子带 4对应的预编码矩阵为 W2HU和子带 5对应的预编码矩阵 为 W2( 23,子带 6对应的预编码矩阵为 W2( 和子带 7对应的预编码矩阵为 W2 , 子带 8对应的预编码矩阵为 和子带 9对应的预编码矩阵为 w^ , 如此, 可以确定子带 0、子带 1和子带 2对应的 ii为 4,即表征 A子带对应的第一 PMI 为 4, 确定子带 3、 子带 4和子带 5对应的 ii为 7, 即表征 B子带对应的第一 PMI为 7,子带 6和子带 7对应的 ii为 9, 即表征 C子带对应的第一 PMI为 9, 子带 8和子带 9对应的 ii为 11, 即表征 D子带对应的第一 PMI为 11。
其中, 将 A子带对应的第一 PMI为 4, B子带对应的第一 PMI为 7 , C 子带对应的第一 PMI为 9, 以及 D子带对应的第一 PMI为 11进行反馈, 还 将子带 0对应的第二 PMI为 0, 子带 1对应的第二 PMI为 2, 子带 2对应的 第二 PMI为 9, 子带 3对应的第二 PMI为 3, 子带 4对应的第二 PMI为 5, 子带 5对应的第二 PMI为 11, 子带 6对应的第二 PMI为 1, 子带 7对应的第 二 PMI为 3, 子带 8对应的第二 PMI为 3, 以及子带 9对应的第二 PMI为 10 进行反馈。
进一步地, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编 码等编码方式对将所述 M个第一 PMI进行编码, 将编码后的所述 M个第一 PMI反馈给所述基站。
具体的, UE可以通过物理上行控制信道( Physical Uplink Control Channel, 简称 PUCCH )或者物理上行共享信道( Physical Uplink Shared Channel, 简称 PUSCH ) 向基站发送所述第一 PMI和所述第二 PMI。
具体来讲, 由于一个第一 PMI对应一个 Wl 7 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。 阵, 且本申请实施例的技术方案能够应用于多输入多输出 ( Multiple-Input Multiple-Output, 简称 MIM0 )无线系统中。 在另一实施例中, UE向基站发送 PMI, 所述 PMI可以是一个具体取值, 此时, 所述 PMI直接指示预编码矩阵, 例如, 共有 256个不同的预编码矩阵, 则可以用 PMI = 0, ..., 255分别指示标号为 0, 1, ...255的编码矩阵, 当 UE 向基站发送的 PMI为 20时,则确定所述预编码矩阵为标号为 20的编码矩阵。
本发明实施例中, 由于本申请技术方案是基于接收到的基站发送的参考 信号, 从码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵 指示 PMI发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一个第二子带反馈一个第一 PMI, 使得将多个第一 PMI反馈给所述基 站, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大 的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能够提高波束量 化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
另外, 由于 M个第一 PMI和 M个第二子带——对应, 使得每一个第一 PMI对应所述系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部 分带宽均有与之对应的第一 PMI, 且 M为不小于 2的整数, 使得通过多个第 一 PMI来覆盖整个系统传输带宽的波束相位变化, 降低系统性能损失; 而且 由于每一个第一 PMI仅对应所述系统传输带宽中的一部分, 进而使得波束向 量的量化颗粒度精度得以提高。
实施例三
本发明实施例三提出了一种预编码矩阵指示的反馈方法, 如图 1 所示, 该方法具体处理过程如下:
步骤 S101 : UE接收基站发送的参考信号;
步骤 S102: 所述 UE基于所述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵, 其中, 所述码本至少 包含两个预编码矩阵, 且每个预编码矩阵至少由第一预编码矩阵指示 PMI和 第二 PMI表示, 其中, 所述 N个第一子带中的每一个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二 子带是从所述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个 第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数;
步骤 S103:所述 UE将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
其中, 在步骤 S101中, UE接收基站发送的参考信号。
在具体实施过程中,所述参考信号可以包括 CSI RS或者 DM RS或者 CRS 等。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述 UE还可以接收到所述基站发送的 RRC信令, 基于所述 RRC信令, 获取所述参考信号。
接下来执行步骤 S102, 在该步骤中, 所述 UE基于所述参考信号, 从码 本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩 阵, 其中, 所述码本至少包含两个预编码矩阵, 且每个预编码矩阵至少由第 一预编码矩阵指示 PMI和第二 PMI表示, 其中, 所述 N个第一子带中的每一 个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个 第一 PMI, 所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M 个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不 小于 2的正整数。
在具体实施过程中, 所述 UE接收到所述参考信号之后,再基于所述参考 信号, 从所述码本中为所述 N个第一子带中的每个第一子带选择一个预编码 矩阵, 所述码本中的每一个预编码矩阵至少由第一 PMI和第二 PMI表示, 其 中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系统传输 带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基站之间 的协议中所定义的来确定。
具体来讲, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部 分子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第 一子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE 可以通过均勾等分方式或者非等分方式来将所述系统传输带宽分成 N个第一 子带。
具体来讲, 在所述 UE从码本中为系统传输带宽中的 N个第一子带中的 每个第一子带选择一个预编码矩阵之前, 还需从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 M个第二子带包含的所有的第一子带为所述 N 个第一子带, 且每一个第一子带仅能够被一个第二子带所包含, 其中, 由于 所述 M个第二子带中的每一个第二子带对应一个第一 PMI, 使得包含有至少 两个第一子带的第二子带中包含的所有第一子带均对应同一个第一 PMI。
由于 M个第二子带对应有 M个第一 PMI, 使得每一个第一 PMI对应所 述系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部分带宽均有 与之对应的第一 PMI,从而使得 M个第一 PMI覆盖系统传输带宽的波束相位 变化, 降低系统性能损失; 而且由于每一个第一 PMI仅对应所述系统传输带 宽中的一部分, 进而使得波束向量的量化颗粒度精度得以提高。
进一步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI 不相同。
具体的, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE 首先确定所述 M的值, 再根据所述 M的值, 从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 M的值是所述基站配置的, 即表征所述 M的 值是以所述基站配置方式来确定, 所述基站将以所述基站配置方式确定的所 述 M的值发送给所述 UE, 使得所述 UE接收到所述 M的值, 进而再根据所 述 M的值, 从所述 N个第一子带中确定所述 M个第二子带。
具体的, 在以所述基站配置方式来确定所述 M的值时, 所述基站可以直 接设定所述 M的值, 也可以才艮据所述系统传输带宽, 确定所述 M的值, 例如 所述基站设置的所述 M的值例如为 3、 4、 5等值, 然后所述基站将所述 M的 值发送给所述 UE, 使得所述 UE接收到所述 M的值, 再根据所述 M的值, 从所述 N个第一子带中确定所述 M个第二子带。 具体的, 所述基站根据所述系统传输带宽, 确定所述 M的值时, 例如在 所述系统传输带宽不大于 10MHz时, 所述基站将所述 M的值设置为 3, 4, 5 等值,在所述系统传输带宽大于 10MHz时,所述基站将所述 M的值设置为 4, 5、 6等值, 然后所述基站将所述 M的值发送给所述 UE, 使得所述 UE接收 到所述 M的值, 再根据所述 M的值, 从所述 N个第一子带中确定所述 M个 第二子带。
例如, 若所述系统传输带宽为 10MHz, 所述基站根据所述系统传输带宽, 确定所述 M的值为 4, 则将所述 M的值反馈给所述 UE, 使得所述 UE接收 到所述基站反馈的所述 M的值。
同理, 所述 UE接收到所述基站配置的所述 M的值之后, 可以通过连续 带宽划分方式或非连续带宽划分方式, 以此来将所述 N个第一子带划分为所 述 M个第二子带, 在以所述连续带宽划分方式划分时, 所述每一个第二子带 中的相邻两个第一子带对应的频率是连续的; 在以所述非连续带宽划分方式 划分时, 所述每一个第二子带中的至少存在一组相邻两个第一子带对应的频 率不连续。
当然, 所述 UE也可以接收到所述基站配置的所述 M的值之前, 就可以 确定从所述 N个第一子带中确定所述 M个第二子带的确定方式, 所述确定方 式例如是连续带宽划分方式或非连续带宽划分方式;所述 UE还可以在接收到 所述 M的值同时, 确定从所述 N个第一子带中确定所述 M个第二子带的所 述确定方式, 本申请不作具体限制。
例如, 参见图 2, 例如, 若所述系统传输带宽为 10MHz, 所述基站根据 所述系统传输带宽, 确定所述 M的值为 4, 则将所述 M的值反馈给所述 UE, 使得所述 UE接收到所述基站反馈的所述 M的值, 使得所述 UE确定所述 M 的值为 4, 再以所述非连续带宽划分方式来划分所述 N个第一子带, 则子带 10、 子带 11、 子带 12、 子带 13、 子带 14、 子带 15、 子带 16、 子带 17、 子带 18和子带 19中确定 4个第二子带, 例如所述 4个第二子带为 A1子带、 B1 子带、 C1子带和 D1子带, 其中, A1子带包含子带 10、 子带 12和子带 14, Bl子带包含子带 11、 子带 13和子带 15, C1子带包含子带 16和子带 18, D1 子带包含子带 17和子带 19, 其中, Al、 Bl、 CI和 D1子带中的每一个第二 子带包含的每两个相邻的第一子带对应的频率均是不连续的。
由于所述 M的值是所述基站配置的, 不同的 UE所处环境不同, 对应的 信道特征参数例如角度扩展、 频率相关性、 空间相关性不同, 使得所述基站 配置的所述 M的值可以相同或不同,进而可以确定不同的 UE对应的 M的值 可以相同或不相同, 以及使得至少有两个 UE对应的 M的值也可以相同或不 相同。
进一步的, 不同的 UE对应的系统传输带宽可以是相同或不同的, 而且可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带, 从而可以确定不同的 UE对应的 N的值是可以相同或不相同的, 且不同 的 UE对应的第二子带的数量可以相同或不同, 在两个 UE对应的 N值相同, 且 M值不同时,使得所述两个 UE对应的 M个第二子带中每个第二子带包含 第一子带的个数是不相同; 而在两个 UE对应的 N值相同, 且 M值相同时, 使得所述两个 UE对应的 M个第二子带中每个第二子带包含第一子带的个数 可以是相同的, 如此, 使得至少有两个 UE对应的 M个第二子带中每个第二 子带包含第一子带的个数是不相同或相同的。
接下来执行步骤 S103, 在该步骤中, 所述 UE将每一个第二子带对应的 第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所 述基站。
在具体实施过程中,所述 UE在通过步骤 S103确定 M个第二子带中的每 一个第二子带对应的第一 PMI, 以及确定所述 N个第一子带中的每一个第一 子带对应的第二 PMI之后, 将每一个第二子带对应的第一 PMI反馈至所述基 站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
具体来讲, 所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗 粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带 或者一个子带。 具体的, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编码 等编码方式对将所述 M个第一 PMI进行编码,将编码后的所述 M个第一 PMI 反馈给所述基站。
具体的, UE可以通过 UCCH或者 PUSCH向基站发送所述第一 PMI和所 述第二 PMI。
具体来讲, 由于一个第一 PMI对应一个 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述1^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应 ^ (¾)。
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。 阵, 且本申请实施例的技术方案能够应用于多输入多输出 MIMO无 线系统中。
在另一实施例中, UE向基站发送 PMI, 所述 PMI可以是一个具体取值, 此时, 所述 PMI直接指示预编码矩阵, 例如, 共有 256个不同的预编码矩阵, 则可以用 PMI = 0, ..., 255分别指示标号为 0, 1, ...255的编码矩阵, 当 UE 向基站发送的 PMI为 20时,则确定所述预编码矩阵为标号为 20的编码矩阵。
在实际应用过程中, 所述 UE根据接收到的所述基站发送的参考信号,从 码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码 矩阵, 并将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每一个 第一子带对应的第二 PMI反馈至所述基站, 使得所述基站能够基于接收到所 述第一 PMI的数量, 来确定所述 M的值, 在根据所述 M的值, 釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 然后根据所 述 UE反馈的第一 PMI和第二 PMI, 获取到与每一个第一子带对应的预编码 矩阵, 根据获取到的与每一个第一子带对应的预编码矩阵对应的编码方式来 传输数据。 本发明实施例中, 由于本申请技术方案是基于接收到的基站发送的参考 信号, 从码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵 指示 PMI发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一个第二子带反馈一个第一 PMI, 使得将多个第一 PMI反馈给所述基 站, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大 的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能够提高波束量 化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
另外, 由于 M个第一 PMI和 M个第二子带——对应, 使得每一个第一 PMI对应所述系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部 分带宽均有与之对应的第一 PMI, 且 M为不小于 2的整数, 使得通过多个第 一 PMI来覆盖整个系统传输带宽的波束相位变化, 降低系统性能损失; 而且 由于每一个第一 PMI仅对应所述系统传输带宽中的一部分, 进而使得波束向 量的量化颗粒度精度得以提高。
实施例四
本发明实施例四提出了一种预编码矩阵指示的反馈方法, 如图 1 所示, 该方法具体处理过程如下:
步骤 S101 : UE接收基站发送的参考信号;
步骤 S102: 所述 UE基于所述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵, 其中, 所述码本至少 包含两个预编码矩阵, 且每个预编码矩阵至少由第一预编码矩阵指示 PMI和 第二 PMI表示, 其中, 所述 N个第一子带中的每一个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二 子带是从所述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个 第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数;
步骤 S103:所述 UE将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。 其中, 在步骤 S101中, UE接收基站发送的参考信号。
在具体实施过程中,所述参考信号可以包括 CSI RS或者 DM RS或者 CRS 等。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述 UE还可以接收到所述基站发送的 RRC信令, 基于所述 RRC信令, 获取所述参考信号。
接下来执行步骤 S102, 在该步骤中, 所述 UE基于所述参考信号, 从码 本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩 阵, 其中, 所述码本至少包含两个预编码矩阵, 且每个预编码矩阵至少由第 一预编码矩阵指示 PMI和第二 PMI表示, 其中, 所述 N个第一子带中的每一 个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个 第一 PMI, 所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M 个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不 小于 2的正整数。
在具体实施过程中, 所述 UE接收到所述参考信号之后,再基于所述参考 信号, 从所述码本中为所述 N个第一子带中的每个第一子带选择一个预编码 矩阵, 所述码本中的每一个预编码矩阵至少由第一 PMI和第二 PMI表示, 其 中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系统传输 带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基站之间 的协议中所定义的来确定。
具体来讲, 在所述 UE从码本中为系统传输带宽中的 N个第一子带中的 每个第一子带选择一个预编码矩阵之前, 还需从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 M个第二子带包含的所有的第一子带为所述 N 个第一子带, 且每一个第一子带仅能够被一个第二子带所包含, 其中, 由于 所述 M个第二子带中的每一个第二子带对应一个第一 PMI, 使得包含有至少 两个第一子带的第二子带中包含的所有第一子带均对应同一个第一 PMI。 由于 M个第二子带对应有 M个第一 PMI, 使得每一个第一 PMI对应所 述系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部分带宽均有 与之对应的第一 PMI,从而使得 M个第一 PMI覆盖系统传输带宽的波束相位 变化, 降低系统性能损失; 而且由于每一个第一 PMI仅对应所述系统传输带 宽中的一部分, 进而使得波束向量的量化颗粒度精度得以提高。
进一步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI 不相同。
具体的, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE 首先确定所述 M的值, 再根据所述 M的值, 从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 M的值是以预定义方式来确定的, 在以所述预 定义方式来确定所述 M的值时, 所述 UE和所述基站可以预先设定同一值为 所述 M的值, 例如可以设定所述 M的值为 3、 4、 5等值; 所述 UE还可以根 据所述系统传输带宽,来设定所述 M的值,在所述系统传输带宽不大于 10MHz 时, 所述 M的值例如为 2、 3、 4等值, 在所述系统传输带宽大于所述 10MHz 时, 所述 M的值例如是 3、 4、 5等值。
例如, 参见图 2, 在所述系统传输带宽为 10MHz时, 所述预定义方式为 每个第二子带包含的第一子带的数量相同,使得所述 UE根据所述预定义方式 确定所述 M的值时, 所述 M的值例如可以为 2, 5, 若 M=5, 使得每一个第 二子带包含 2个第一子带, 例如第一个第二子带包含子带 0和子带 1, 第二个 第二子带包含子带 2和子带 3, 第三个第二子带包含子带 4和子带 5, 第四个 第二子带包含子带 6和子带 7, 以及第五个第二子带包含子带 8和子带 9。
同理, 所述 UE在以所述预定义方式来确定所述 M的值之后, 可以通过 连续带宽划分方式或非连续带宽划分方式, 以此来将所述 N个第一子带划分 为所述 M个第二子带, 在以所述连续带宽划分方式划分时, 所述每一个第二 子带中的相邻两个第一子带对应的频率是连续的; 在以所述非连续带宽划分 方式划分时, 所述每一个第二子带中的至少存在一组相邻两个第一子带对应 的频率不连续。 可以确定从所述 N个第一子带中确定所述 M个第二子带的确定方式, 所述确 定方式例如是连续带宽划分方式或非连续带宽划分方式;所述 UE还可以在以 所述述预定义方式确定所述 M的值的同时,确定从所述 N个第一子带中确定 所述 M个第二子带的所述确定方式, 本申请不作具体限制。
由于所述 M的值是所述预定义方式确定的, 不同的 UE所处环境不同, 对应的信道特征参数例如角度扩展、 频率相关性、 空间相关性不同, 使得通
UE对应的 M的值可以相同或不相同, 以及使得至少有两个 UE对应的 M的 值也可以相同或不相同。
进一步的, 不同的 UE对应的系统传输带宽可以是相同或不同的, 而且可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带, 从而可以确定不同的 UE对应的 N的值是可以相同或不相同的, 且不同 的 UE对应的第二子带的数量可以相同或不同, 在两个 UE对应的 N值相同, 且 M值不同时,使得所述两个 UE对应的 M个第二子带中每个第二子带包含 第一子带的个数是不相同; 而在两个 UE对应的 N值相同, 且 M值相同时, 使得所述两个 UE对应的 M个第二子带中每个第二子带包含第一子带的个数 可以是相同的, 如此, 使得至少有两个 UE对应的 M个第二子带中每个第二 子带包含第一子带的个数是不相同或相同的。
接下来执行步骤 S103, 在该步骤中, 所述 UE将每一个第二子带对应的 第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所 述基站。
在具体实施过程中,所述 UE在通过步骤 S103确定 M个第二子带中的每 一个第二子带对应的第一 PMI, 以及确定所述 N个第一子带中的每一个第一 子带对应的第二 PMI之后, 将每一个第二子带对应的第一 PMI反馈至所述基 站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
具体来讲, 所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗 粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带 或者一个子带。
具体的, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编码 等编码方式对将所述 M个第一 PMI进行编码,将编码后的所述 M个第一 PMI 反馈给所述基站。
具体的, UE可以通过 UCCH或者 PUSCH向基站发送所述第一 PMI和所 述第二 PMI。
具体来讲, 由于一个第一 PMI对应一个 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述1^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。 阵, 且本申请实施例的技术方案能够应用于多输入多输出 MIMO无 线系统中。
本发明实施例中, 由于本申请技术方案是基于接收到的基站发送的参考 信号, 从码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵 指示 PMI发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一个第二子带反馈一个第一 PMI, 使得将多个第一 PMI反馈给所述基 站, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大 的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能够提高波束量 化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
另外, 由于 M个第一 PMI和 M个第二子带——对应, 使得每一个第一 PMI对应所述系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部 分带宽均有与之对应的第一 PMI, 且 M为不小于 2的整数, 使得通过多个第 一 PMI来覆盖整个系统传输带宽的波束相位变化, 降低系统性能损失; 而且 由于每一个第一 PMI仅对应所述系统传输带宽中的一部分, 进而使得波束向 量的量化颗粒度精度得以提高。
实施例五
本发明实施例五提出了一种预编码矩阵指示的反馈方法, 如图 1 所示, 该方法具体处理过程如下:
步骤 S101 : UE接收基站发送的参考信号;
步骤 S102: 所述 UE基于所述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵, 其中, 所述码本至少 包含两个预编码矩阵, 且每个预编码矩阵至少由第一预编码矩阵指示 PMI和 第二 PMI表示, 其中, 所述 N个第一子带中的每一个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二 子带是从所述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个 第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数;
步骤 S103:所述 UE将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
其中, 在步骤 S101中, UE接收基站发送的参考信号。
在具体实施过程中,所述参考信号可以包括 CSI RS或者 DM RS或者 CRS 等。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述 UE还可以接收到所述基站发送的 RRC信令, 基于所述 RRC信令, 获取所述参考信号。
接下来执行步骤 S102, 在该步骤中, 所述 UE基于所述参考信号, 从码 本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩 阵, 其中, 所述码本至少包含两个预编码矩阵, 且每个预编码矩阵至少由第 一预编码矩阵指示 PMI和第二 PMI表示, 其中, 所述 N个第一子带中的每一 个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个 第一 PMI, 所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M 个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不 小于 2的正整数。
在具体实施过程中, 所述 UE接收到所述参考信号之后,再基于所述参考 信号, 从所述码本中为所述 N个第一子带中的每个第一子带选择一个预编码 矩阵, 所述码本中的每一个预编码矩阵至少由第一 PMI和第二 PMI表示, 其 中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系统传输 带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基站之间 的协议中所定义的来确定。
具体来讲, 在所述 UE从码本中为系统传输带宽中的 N个第一子带中的 每个第一子带选择一个预编码矩阵之前, 还需从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 M个第二子带包含的所有的第一子带为所述 N 个第一子带, 且每一个第一子带仅能够被一个第二子带所包含, 其中, 由于 所述 M个第二子带中的每一个第二子带对应一个第一 PMI, 使得包含有至少 两个第一子带的第二子带中包含的所有第一子带均对应同一个第一 PMI。
由于 M个第二子带对应有 M个第一 PMI, 使得每一个第一 PMI对应所 述系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部分带宽均有 与之对应的第一 PMI,从而使得 M个第一 PMI覆盖系统传输带宽的波束相位 变化, 降低系统性能损失; 而且由于每一个第一 PMI仅对应所述系统传输带 宽中的一部分, 进而使得波束向量的量化颗粒度精度得以提高。
进一步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI 不相同。
具体的, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE 首先确定所述 M个第二子带中的每个第二子带包含的第一子带的个数, 再根 据每个第二子带包含的第一子带的个数, 从所述 N个第一子带中确定所述 M 个第二子带, 其中, 所述 UE在每个第二子带包含的第一子带的个数时, 是根 据所述 UE配置方式来确定的。
具体的,在根据所述 UE配置方式来确定每个第二子带包含第一子带的个 数时, 所述 UE可以根据所述 N个第一子带来确定所述每个第二子带包含第 一子带的个数, 例如可以将所述 M个第二子带中的每个第二子带包含的第一 子带的个数为同一个值, 也可以将所述 M个第二子带中的每个第二子带包含 的第一子带的个数为不同的值或部分相同的值。
进一步的,所述 UE在根据所述 UE配置方式来确定每个第二子带包含第 一子带的个数之后, 可以通过连续带宽划分方式或非连续带宽划分方式, 以 此来将所述 N个第一子带划分为所述 M个第二子带,在以所述连续带宽划分 方式划分时, 所述每一个第二子带中的相邻两个第一子带对应的频率是连续 的; 在以所述非连续带宽划分方式划分时, 所述每一个第二子带中的至少存 在一组相邻两个第一子带对应的频率不连续。
例如, 参见图 2, 所述 UE根据子带 0、 子带 1、 子带 2、 子带 3、 子带 4、 子带 5、 子带 6、 子带 7、 子带 8和子带 9中确定所述 M个第二子带中每个第 二子带包含的第一子带的个数时, 若每个第二子带包含的第一子带的个数为 同一个值, 则可以确定每个第二子带包含的第一子带的个数可以为 2或 5, 在 每个第二子带包含的第一子带的个数为 2时, 若以所述连续带宽划分方式划 分, 使得将所述 N个第一子带划分为 5个第二子带, 其中, 所述 5个第二子 带中的第一个第二子带包含子带 0和子带 1,第二个第二子带包含子带 2和子 带 3, 第三个第二子带包含子带 4和子带 5, 第四个第二子带包含子带 6和子 带 7, 以及第五个第二子带包含子带 8和子带 9, 其中, 所述每一个第二子带 中的相邻两个第一子带对应的频率是连续的。
由于本实施例在根据所述 UE配置方式来确定每个第二子带包含第一子 带的个数时, 是根据所述 N个第一子带来确定每个第二子带包含第一子带的 个数, 不同的 UE所处环境不同, 对应的 N的值也可以相同或不同, 使得通 过所述 UE配置方式确定的每个第二子带包含第一子带的个数,可以相同或不 同, 进而可以确定不同的 UE对应的 M个第二子带中每个第二子带包含第一 子带的个数可以相同或不相同, 以及至少有两个 UE对应的 M个第二子带中 每个第二子带包含第一子带的个数不相同。
在具体实施过程中, 所述 UE基于所述参考信号,从码本中为系统传输带 宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵时, 所述方法还 包括: 所述 UE将所述 M个第二子带中每个第二子带包含的第一子带的个数 上报给所述基站。
具体的, 所述 UE确定每个第二子带包含的第一子带的个数之后, 所述 UE将每个第二子带包含的第一子带的个数上报给所述基站, 以使得所述基站 能够接收到每个第二子带包含的第一子带的个数,釆用与所述 UE相同的方式 从所述 N个第一子带中确定所述 M个第二子带。
接下来执行步骤 S103, 在该步骤中, 所述 UE将每一个第二子带对应的 第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所 述基站。
在具体实施过程中,所述 UE在通过步骤 S103确定 M个第二子带中的每 一个第二子带对应的第一 PMI, 以及确定所述 N个第一子带中的每一个第一 子带对应的第二 PMI之后, 将每一个第二子带对应的第一 PMI反馈至所述基 站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
具体来讲, 所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗 粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带 或者一个子带。
具体的, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编码 等编码方式对将所述 M个第一 PMI进行编码,将编码后的所述 M个第一 PMI 反馈给所述基站。
具体的, UE可以通过 UCCH或者 PUSCH向基站发送所述第一 PMI和所 述第二 PMI。
具体来讲, 由于一个第一 PMI对应一个 Wl 7 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述1^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应 \ (n 。
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩,进一步的,本申请实施例的技术方案能够应用于多输入多输出 MIMO 无线系统中。
其中, 所述 UE根据接收到的所述基站发送的参考信号,从码本中为系统 传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵时, 所述 UE还可以将所述 M个第二子带中每个第二子带包含的第一子带的个数上报 给所述基站,使得所述基站在接收所述 UE反馈的第一 PMI和第二 PMI之前, 就已经釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二 子带, 以使得再接收到所述 UE反馈的第一 PMI和第二 PMI时, 能够更快的 获取到与每一个第一子带对应的预编码矩阵, 使得工作效率得以提高。
在另一实施例中, 所述 UE基于所述参考信号,从码本中为系统传输带宽 中的 N个第一子带中的每个第一子带选择一个预编码矩阵时, 所述方法还包 括: 所述 UE将所述 M个第二子带中每个第二子带包含的第一子带的个数上 报给所述基站。
在具体实施过程中, 在所述基站未获取到所述 M个第二子带中每个第二 子带包含的第一子带的个数时, 所述 UE可以将所述 M个第二子带中每个第 二子带包含的第一子带的个数上报给所述基站。
由于所述 UE根据接收到的所述基站发送的参考信号,从码本中为系统传 输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵时,所述 UE 还可以将所述 M个第二子带中每个第二子带包含的第一子带的个数上报给所 述基站, 使得所述基站在接收所述 UE反馈的第一 PMI和第二 PMI之前, 就 已经釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子 带, 以使得再接收到所述 UE反馈的第一 PMI和第二 PMI时, 能够更快的获 取到与每一个第一子带对应的预编码矩阵, 使得工作效率得以提高。
本发明实施例中, 由于本申请技术方案是基于接收到的基站发送的参考 信号, 从码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵 指示 PMI发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一个第二子带反馈一个第一 PMI, 使得将多个第一 PMI反馈给所述基 站, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大 的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能够提高波束量 化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
另外, 由于 M个第一 PMI和 M个第二子带——对应, 使得每一个第一 PMI对应所述系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部 分带宽均有与之对应的第一 PMI, 且 M为不小于 2的整数, 使得通过多个第 一 PMI来覆盖整个系统传输带宽的波束相位变化, 降低系统性能损失; 而且 由于每一个第一 PMI仅对应所述系统传输带宽中的一部分, 进而使得波束向 量的量化颗粒度精度得以提高。
实施例六
本发明实施例六提出了一种预编码矩阵指示的反馈方法, 如图 1 所示, 该方法具体处理过程如下:
步骤 S101 : UE接收基站发送的参考信号;
步骤 S102: 所述 UE基于所述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵, 其中, 所述码本至少 包含两个预编码矩阵, 且每个预编码矩阵至少由第一预编码矩阵指示 PMI和 第二 PMI表示, 其中, 所述 N个第一子带中的每一个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二 子带是从所述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个 第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数; 步骤 S103:所述 UE将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
其中, 在步骤 S101中, UE接收基站发送的参考信号。
在具体实施过程中,所述参考信号可以包括 CSI RS或者 DM RS或者 CRS 等。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述 UE还可以接收到所述基站发送的 RRC信令, 基于所述 RRC信令, 获取所述参考信号。
接下来执行步骤 S102, 在该步骤中, 所述 UE基于所述参考信号, 从码 本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩 阵, 其中, 所述码本至少包含两个预编码矩阵, 且每个预编码矩阵至少由第 一预编码矩阵指示 PMI和第二 PMI表示, 其中, 所述 N个第一子带中的每一 个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个 第一 PMI, 所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M 个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不 小于 2的正整数。
在具体实施过程中, 所述 UE接收到所述参考信号之后,再基于所述参考 信号, 从所述码本中为所述 N个第一子带中的每个第一子带选择一个预编码 矩阵, 所述码本中的每一个预编码矩阵至少由第一 PMI和第二 PMI表示, 其 中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系统传输 带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基站之间 的协议中所定义的来确定。
具体来讲, 在所述 UE从码本中为系统传输带宽中的 N个第一子带中的 每个第一子带选择一个预编码矩阵之前, 还需从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 M个第二子带包含的所有的第一子带为所述 N 个第一子带, 且每一个第一子带仅能够被一个第二子带所包含, 其中, 由于 所述 M个第二子带中的每一个第二子带对应一个第一 PMI, 使得包含有至少 两个第一子带的第二子带中包含的所有第一子带均对应同一个第一 PMI。
由于 M个第二子带对应有 M个第一 PMI, 使得每一个第一 PMI对应所 述系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部分带宽均有 与之对应的第一 PMI,从而使得 M个第一 PMI覆盖系统传输带宽的波束相位 变化, 降低系统性能损失; 而且由于每一个第一 PMI仅对应所述系统传输带 宽中的一部分, 进而使得波束向量的量化颗粒度精度得以提高。
进一步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI 不相同。
具体的, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE 首先确定所述 M个第二子带中的每个第二子带包含的第一子带的个数, 再根 据每个第二子带包含的第一子带的个数, 从所述 N个第一子带中确定所述 M 个第二子带, 其中, 所述 UE在每个第二子带包含的第一子带的个数时, 是根 据所述 UE反馈方式来确定的。
具体的, 在所述 M个第二子带中的每个第二子带包含的第一子带的个数 是根据所述 UE反馈方式来确定时,所述 UE将预选择的每个第二子带包含的 第一子带的个数上报给所述基站;所述 UE接收所述基站反馈的每个第二子带 包含的第一子带的个数, 所述每个第二子带包含的第一子带的个数是所述基 站基于所述预选择的每个第二子带包含的第一子带的个数来确定的。
具体的, 所述基站根据所述预选择的每个第二子带包含的第一子带的个 数, 确定所述每个第二子带包含的第一子带的个数时, 所述每个第二子带包 含的第一子带的个数与所述预选择的每个第二子带包含的第一子带的个数相 同或不同。
例如, 参见图 2, 所述 UE根据为 10MHz的所述系统传输带宽, 确定出 预选择的所述 M个第二子带中每个第二子带包含第一子带的个数为 3、 3、 2 和 2, 所述基站根据接收到的 3、 3、 2和 2, 例如可以确定所述 M个第二子带 中每个第二子带包含第一子带的个数例如可以为 3、 3、 2和 2, 3、 3、 3和 1、 4、 2、 2和 2等, 所述基站再将确定出的每个第二子带包含第一子带的个数反 馈给所述 UE, 使得所述 UE能够接收到所述基站发送的每个第二子带包含第 一子带的个数。
进一步的,所述 UE在根据所述 UE反馈方式来确定每个第二子带包含第 一子带的个数之后, 可以通过连续带宽划分方式或非连续带宽划分方式, 以 此来将所述 N个第一子带划分为所述 M个第二子带,在以所述连续带宽划分 方式划分时, 所述每一个第二子带中的相邻两个第一子带对应的频率是连续 的; 在以所述非连续带宽划分方式划分时, 所述每一个第二子带中的至少存 在一组相邻两个第一子带对应的频率不连续。
例如, 参见图 2, 所述 UE根据为 10MHz的所述系统传输带宽, 确定出 预选择的所述 M个第二子带中每个第二子带包含第一子带的个数为 3、 3、 2 和 2, 并将 3、 3、 2和 2发送给所述基站, 所述基站基于 3、 3、 2和 2确定出 每个第二子带包含第一子带的个数例如可以为 3、 3、 3和 1, 然后将 3、 3、 3 和 1发送给所述 UE, 所述 UE基于 3、 3、 3和 1, 以连续带宽方式来划分子 带 0、 子带 1、 子带 2、 子带 3、 子带 4、 子带 5、 子带 6、 子带 7、 子带 8和 子带 9, 进而获得 4个第二子带, 所述 4个第二子带中的第一个第二子带包含 子带 0、 子带 1和子带 2, 第二个第二子带包含子带子带 3、 子带 4和子带 5, 第三个第二子带包含带 6、 子带 7和子带 8, 第四个第二子带包含子带 9, 其 中, 除所述第四个第二子带中仅有一个第一子带外, 其它 3个第二子带中每 个第二子带中的相邻两个第一子带对应的频率是连续的。
由于本申请实施例是根据所述 UE反馈方式来确定每个第二子带包含第 一子带的个数时, 不同的 UE所处环境不同, 对应的信道特征参数例如角度 扩展、 频率相关性、 空间相关性不同, 使得选择的所述预选择的每个第二子 带包含第一子带的个数可以相同或不同, 使得所述基站根据所述预选择的每 个第二子带包含第一子带的个数来确定每个第二子带包含第一子带的个数 时, 每个第二子带包含第一子带的个数可以与所述预选择的每个第二子带包 含第一子带的个数相同或不同, 使得每个第二子带包含第一子带的个数也可 以相同或不同, 如此, 使得不同的 UE对应的 M个第二子带中每个第二子带 包含第一子带的个数可以相同或不相同, 以及使得至少有两个 UE对应的 M 个第二子带中每个第二子带包含第一子带的个数不相同。
接下来执行步骤 S103, 在该步骤中, 所述 UE将每一个第二子带对应的 第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所 述基站。
在具体实施过程中,所述 UE在通过步骤 S103确定 M个第二子带中的每 一个第二子带对应的第一 PMI, 以及确定所述 N个第一子带中的每一个第一 子带对应的第二 PMI之后, 将每一个第二子带对应的第一 PMI反馈至所述基 站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
具体来讲, 所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗 粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带 或者一个子带。
具体的, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编码 等编码方式对将所述 M个第一 PMI进行编码,将编码后的所述 M个第一 PMI 反馈给所述基站。
具体的, UE可以通过 UCCH或者 PUSCH向基站发送所述第一 PMI和所 述第二 PMI。
具体来讲, 由于一个第一 PMI对应一个 Wl 7 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应 ^ (¾)。
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。 阵, 且本申请实施例的技术方案能够应用于多输入多输出 MIMO无 线系统中。 本发明实施例中, 由于本申请技术方案是基于接收到的基站发送的参考 信号, 从码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵 指示 PMI发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一个第二子带反馈一个第一 PMI, 使得将多个第一 PMI反馈给所述基 站, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大 的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能够提高波束量 化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
实施例七
本发明实施例七提出了一种预编码矩阵指示的反馈方法, 如图 1 所示, 该方法具体处理过程如下:
步骤 S101 : UE接收基站发送的参考信号;
步骤 S102: 所述 UE基于所述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵, 其中, 所述码本至少 包含两个预编码矩阵, 且每个预编码矩阵至少由第一预编码矩阵指示 PMI和 第二 PMI表示, 其中, 所述 N个第一子带中的每一个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二 子带是从所述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个 第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数;
步骤 S103:所述 UE将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
其中, 在步骤 S101中, UE接收基站发送的参考信号。
在具体实施过程中,所述参考信号可以包括 CSI RS或者 DM RS或者 CRS 等。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述 UE还可以接收到所述基站发送的 RRC信令, 基于所述 RRC信令, 获取所述参考信号。
接下来执行步骤 S102, 在该步骤中, 所述 UE基于所述参考信号, 从码 本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩 阵, 其中, 所述码本至少包含两个预编码矩阵, 且每个预编码矩阵至少由第 一预编码矩阵指示 PMI和第二 PMI表示, 其中, 所述 N个第一子带中的每一 个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个 第一 PMI, 所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M 个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不 小于 2的正整数。
在具体实施过程中, 所述 UE接收到所述参考信号之后,再基于所述参考 信号, 从所述码本中为所述 N个第一子带中的每个第一子带选择一个预编码 矩阵, 所述码本中的每一个预编码矩阵至少由第一 PMI和第二 PMI表示, 其 中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系统传输 带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基站之间 的协议中所定义的来确定。
具体来讲, 在所述 UE从码本中为系统传输带宽中的 N个第一子带中的 每个第一子带选择一个预编码矩阵之前, 还需从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 M个第二子带包含的所有的第一子带为所述 N 个第一子带, 且每一个第一子带仅能够被一个第二子带所包含, 其中, 由于 所述 M个第二子带中的每一个第二子带对应一个第一 PMI, 使得包含有至少 两个第一子带的第二子带中包含的所有第一子带均对应同一个第一 PMI。
由于 M个第二子带对应有 M个第一 PMI, 使得每一个第一 PMI对应所 述系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部分带宽均有 与之对应的第一 PMI,从而使得 M个第一 PMI覆盖系统传输带宽的波束相位 变化, 降低系统性能损失; 而且由于每一个第一 PMI仅对应所述系统传输带 宽中的一部分, 进而使得波束向量的量化颗粒度精度得以提高。
进一步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI 不相同。
具体的, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE 首先确定所述 M个第二子带中的每个第二子带包含的第一子带的个数, 再根 据每个第二子带包含的第一子带的个数, 从所述 N个第一子带中确定所述 M 个第二子带, 其中, 所述 UE在每个第二子带包含的第一子带的个数时, 是根 据所述基站配置方式来确定的。
具体的, 在所述 M个第二子带中的每个第二子带包含的第一子带的个数 是根据所述基站配置方式来确定时, 所述基站可以根据所述 N个第一子带, 对所述 M个第二子带中的每个第二子带包含的第一子带的个数进行配置, 所 述基站在配置所述 M个第二子带中的每个第二子带包含的第一子带的个数之 后, 将所述 M个第二子带中的每个第二子带包含的第一子带的个数反馈给所 述 UE,使得所述 UE根据所述 M个第二子带中的每个第二子带包含的第一子 带的个数, 从所述 N个第一子带中确定所述 M个第二子带。
具体的, 在根据所述基站配置方式来确定每个第二子带包含第一子带的 个数时, 所述基站可以根据所述 N个第一子带来确定所述每个第二子带包含 第一子带的个数, 例如可以将所述 M个第二子带中的每个第二子带包含的第 一子带的个数为同一个值, 也可以将所述 M个第二子带中的每个第二子带包 含的第一子带的个数为不同的值或部分相同的值。
例如, 参见图 2, 所述基站根据子带 0、 子带 1、 子带 2、 子带 3、 子带 4、 子带 5、 子带 6、 子带 7、 子带 8和子带 9中确定所述 M个第二子带中每个第 二子带包含的第一子带的个数时, 若每个第二子带包含的第一子带的个数为 同一个值, 则可以确定每个第二子带包含的第一子带的个数可以为 2或 5。
进一步的, 所述基站根据所述基站配置方式确定每个第二子带包含第一 子带的个数, 并将每个第二子带包含第一子带的个数发送给所述 UE, 使得所 述 UE接收到所述基站反馈的每个第二子带包含第一子带的个数,在接收到所 述基站反馈的每个第二子带包含第一子带的个数之后, 可以通过连续带宽划 分方式或非连续带宽划分方式, 以此来将所述 N个第一子带划分为所述 M个 第二子带, 在以所述连续带宽划分方式划分时, 所述每一个第二子带中的相 邻两个第一子带对应的频率是连续的; 在以所述非连续带宽划分方式划分时, 所述每一个第二子带中的至少存在一组相邻两个第一子带对应的频率不连 续。
例如, 参见图 2, 所述基站根据子带 0、 子带 1、 子带 2、 子带 3、 子带 4、 子带 5、 子带 6、 子带 7、 子带 8和子带 9中确定所述 M个第二子带中每个第 二子带包含的第一子带的个数时, 若每个第二子带包含的第一子带的个数为 同一个值, 则可以确定每个第二子带包含的第一子带的个数可以为 2或 5, 若 每个第二子带包含的第一子带的个数为 2,所述基站将每个第二子带包含的第 一子带的个数为 2反馈给所述 UE, 所述 UE根据每个第二子带包含的第一子 带的个数为 2, 以所述连续带宽划分方式进行划分, 使得将所述 N个第一子 带划分为 5个第二子带, 其中, 所述 5个第二子带中的第一个第二子带包含 子带 0和子带 1, 第二个第二子带包含子带 2和子带 3, 第三个第二子带包含 子带 4和子带 5, 第四个第二子带包含子带 6和子带 7, 以及第五个第二子带 包含子带 8和子带 9, 其中, 所述每一个第二子带中的相邻两个第一子带对应 的频率是连续的。
由于本实施例在根据所述基站配置方式来确定每个第二子带包含第一子 带的个数时, 是根据所述 N个第一子带来确定每个第二子带包含第一子带的 个数, 不同的 UE所处环境不同, 对应的 N的值也可以相同或不同, 使得通 过所述基站配置方式确定的每个第二子带包含第一子带的个数, 可以相同或 不同, 进而可以确定不同的 UE对应的 M个第二子带中每个第二子带包含第 一子带的个数可以相同或不相同, 以及使得至少有两个 UE对应的 M个第二 子带中每个第二子带包含第一子带的个数不相同。
接下来执行步骤 S103, 在该步骤中, 所述 UE将每一个第二子带对应的 第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所 述基站。
在具体实施过程中,所述 UE在通过步骤 S103确定 M个第二子带中的每 一个第二子带对应的第一 PMI, 以及确定所述 N个第一子带中的每一个第一 子带对应的第二 PMI之后, 将每一个第二子带对应的第一 PMI反馈至所述基 站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
具体来讲, 所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗 粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带 或者一个子带。
具体的, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编码 等编码方式对将所述 M个第一 PMI进行编码,将编码后的所述 M个第一 PMI 反馈给所述基站。
具体的, UE可以通过 UCCH或者 PUSCH向基站发送所述第一 PMI和所 述第二 PMI。
具体来讲, 由于一个第一 PMI对应一个 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述1^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。 阵, 且本申请实施例的技术方案能够应用于多输入多输出 MIMO无 线系统中。
本发明实施例中, 由于本申请技术方案是基于接收到的基站发送的参考 信号, 从码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵 指示 PMI发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一个第二子带反馈一个第一 PMI, 使得将多个第一 PMI反馈给所述基 站, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大 的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能够提高波束量 化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。 实施例八
本发明实施例七提出了一种预编码矩阵指示的反馈方法, 如图 1 所示, 该方法具体处理过程如下:
步骤 S101 : UE接收基站发送的参考信号;
步骤 S102: 所述 UE基于所述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵, 其中, 所述码本至少 包含两个预编码矩阵, 且每个预编码矩阵至少由第一预编码矩阵指示 PMI和 第二 PMI表示, 其中, 所述 N个第一子带中的每一个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二 子带是从所述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个 第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数;
步骤 S103:所述 UE将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
其中, 在步骤 S101中, UE接收基站发送的参考信号。
在具体实施过程中,所述参考信号可以包括 CSI RS或者 DM RS或者 CRS 等。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述 UE还可以接收到所述基站发送的 RRC信令, 基于所述 RRC信令, 获取所述参考信号。
接下来执行步骤 S102, 在该步骤中, 所述 UE基于所述参考信号, 从码 本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩 阵, 其中, 所述码本至少包含两个预编码矩阵, 且每个预编码矩阵至少由第 一预编码矩阵指示 PMI和第二 PMI表示, 其中, 所述 N个第一子带中的每一 个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个 第一 PMI, 所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M 个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不 小于 2的正整数。
在具体实施过程中, 所述 UE接收到所述参考信号之后,再基于所述参考 信号, 从所述码本中为所述 N个第一子带中的每个第一子带选择一个预编码 矩阵, 所述码本中的每一个预编码矩阵至少由第一 PMI和第二 PMI表示, 其 中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系统传输 带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基站之间 的协议中所定义的来确定。
具体来讲, 在所述 UE从码本中为系统传输带宽中的 N个第一子带中的 每个第一子带选择一个预编码矩阵之前, 还需从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 M个第二子带包含的所有的第一子带为所述 N 个第一子带, 且每一个第一子带仅能够被一个第二子带所包含, 其中, 由于 所述 M个第二子带中的每一个第二子带对应一个第一 PMI, 使得包含有至少 两个第一子带的第二子带中包含的所有第一子带均对应同一个第一 PMI。
由于 M个第二子带对应有 M个第一 PMI, 使得每一个第一 PMI对应所 述系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部分带宽均有 与之对应的第一 PMI,从而使得 M个第一 PMI覆盖系统传输带宽的波束相位 变化, 降低系统性能损失; 而且由于每一个第一 PMI仅对应所述系统传输带 宽中的一部分, 进而使得波束向量的量化颗粒度精度得以提高。
进一步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI 不相同。
具体的, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE 首先确定所述 M个第二子带中的每个第二子带包含的第一子带的个数, 再根 据每个第二子带包含的第一子带的个数, 从所述 N个第一子带中确定所述 M 个第二子带, 其中, 所述 UE在每个第二子带包含的第一子带的个数时, 是根 据所述预定义方式来确定的。
具体的, 在所述 M个第二子带中的每个第二子带包含的第一子带的个数 是根据所述预定义方式来确定时,所述 UE和所述基站均釆用预定义规则来配 置所述 M个第二子带中的每个第二子带包含的第一子带的个数, 所述预定义 规则例如可以是每个第二子带包含的第一子带的个数均相同, 或均不同, 或 部分相同等。
例如, 参见图 2, 所述基站和所述 UE可以根据所述预定义规则来对所述 M个第二子带中每个第二子带包含的第一子带的个数进行配置, 若所述预定 义规则为每个第二子带包含的第一子带的个数部分相同, 则所述 M个第二子 带中每个第二子带包含的第一子带的个数例如为 3、 3、 2和 2, 4、 4、 1和 1 等。
进一步的, 所述 UE根据所述预定义方式确定出所述 M个第二子带中每 个第二子带包含的第一子带的个数之后, 可以通过连续带宽划分方式或非连 续带宽划分方式, 以此来将所述 N个第一子带划分为所述 M个第二子带, 在 以所述连续带宽划分方式划分时, 所述每一个第二子带中的相邻两个第一子 带对应的频率是连续的; 在以所述非连续带宽划分方式划分时, 所述每一个 第二子带中的至少存在一组相邻两个第一子带对应的频率不连续。
例如, 参见图 2, 所述基站和所述 UE可以根据所述预定义规则来对所述 M个第二子带中每个第二子带包含的第一子带的个数进行配置, 若所述预定 义规则为每个第二子带包含的第一子带的个数部分相同, 则可以确定所述 M 个第二子带中每个第二子带包含的第一子带的个数例如为 3、 3、 2和 2, 若以 所述连续带宽划分方式进行划分, 则从子带 0、 子带 1、 子带 2、 子带 3、 子 带 4、 子带 5、 子带 6、 子带 7、 子带 8和子带 9确定出 4个第二子带, 所述 4 个第二子带例如为 A子带、 B子带、 C子带和 D子带, 其中, A子带包含子 带 0、 子带 1和子带 2; B子带包含子带 3、 子带 4和子带 5; C子带包含子带 6和子带 7; D子带包含子带 8和子带 9, 其中, 所述每一个第二子带中的相 邻两个第一子带对应的频率是连续的。
由于本实施例中每个第二子带包含第一子带的个数是根据所述预定义方 式来确定的, 不同的 UE所处环境不同, 对应的信道特征参数例如角度扩展、 频率相关性、 空间相关性不同, 使得通过所述预定义方式确定出的每个第二 子带包含第一子带的个数可以相同或不同,进而可以确定不同的 UE对应的所 述 M个第二子带中的每个第二子带包含第一子带的个数可以相同或不同。
接下来执行步骤 S103, 在该步骤中, 所述 UE将每一个第二子带对应的 第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所 述基站。
在具体实施过程中,所述 UE在通过步骤 S103确定 M个第二子带中的每 一个第二子带对应的第一 PMI, 以及确定所述 N个第一子带中的每一个第一 子带对应的第二 PMI之后, 将每一个第二子带对应的第一 PMI反馈至所述基 站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
具体来讲, 所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗 粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带 或者一个子带。
具体的, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编码 等编码方式对将所述 M个第一 PMI进行编码,将编码后的所述 M个第一 PMI 反馈给所述基站。
具体的, UE可以通过 UCCH或者 PUSCH向基站发送所述第一 PMI和所 述第二 PMI。
具体来讲, 由于一个第一 PMI对应一个 Wl 7 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应 ^ (¾)。
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。 阵, 且本申请实施例的技术方案能够应用于多输入多输出 MIMO无 线系统中。 本发明实施例中, 由于本申请技术方案是基于接收到的基站发送的参考 信号, 从码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵 指示 PMI发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一个第二子带反馈一个第一 PMI, 使得将多个第一 PMI反馈给所述基 站, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大 的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能够提高波束量 化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
实施例九
基于与上述预编码矩阵指示的反馈方法相同的技术构思, 本申请实施例 九提供了一种预编码矩阵指示的接收方法, 如图 5 所示, 该方法具体处理过 程如下:
步骤 S501 : 基站向 UE发送参考信号;
步骤 S502: 所述基站接收所述 UE反馈的系统传输带宽中的 N个第一子 带中的每一个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带 对应的第一 PMI,其中,所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数, 所述基站具有一码本, 所述码本至少包含两个预 编码矩阵, 能够根据所述每一个第二子带对应的第一 PMI和所述每一个第一 子带对应的第二 PMI, 从所述码本中选择对应的预编码矩阵。
其中, 在步骤 S501中, 基站向 UE发送参考信号。 在具体实施过程中, 所述参考信号可以包括 CSI RS或者 DM RS或者 CRS。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述基站还可以向所述 UE发送 RRC信 令, 所述 RRC信令中包含有所述参考信号, 使得所述 UE能够基于接收到的 所述 RRC信令, 获取所述参考信号。 接下来执行步骤 S502, 在该步骤中, 所述基站接收所述 UE反馈的系统 传输带宽中的 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二 子带中的每一个第二子带对应的第一 PMI, 其中, 所述 M个第二子带是从所 述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个第二子带包 含至少二个第一子带, N和 M均为不小于 2的正整数,所述基站具有一码本, 所述码本至少包含两个预编码矩阵, 能够根据所述每一个第二子带对应的第 一 PMI和所述每一个第一子带对应的第二 PMI, 从所述码本中选择对应的预 编码矩阵。
其中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系 统传输带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基 站之间的协议中所定义的来确定。
进一步的, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部 分子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第 一子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE 可以通过均勾等分方式或者非等分方式来将所述系统传输带宽分成 N个第一 子带。
在具体实施过程中, 所述基站发送所述参考信号之后, 所述 UE能够接收 到所述参考信号, 再基于所述参考信号, 从所述码本中为所述 N个第一子带 中的每个第一子带选择一个预编码矩阵, 所述码本中的每一个预编码矩阵至 少由第一 PMI和第二 PMI表示,然后将每一个第二子带对应的第一 PMI和每 一个第一子带对应的第二 PMI反馈给所述基站, 使得所述基站能够接收到所 述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI, 并根据所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第 二 PMI, 从所述码本中查找对应的预编码矩阵。
具体来讲, 所述 UE从所述码本中为所述 N个第一子带中的每个第一子 带选择一个预编码矩阵之后, 将每一个第二子带对应的第一 PMI反馈至所述 基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站, 使得所述基 站接收到所述 UE反馈的每一个第二子带对应的第一 PMI和每一个第一子带 对应的第二 PMI, 下面叙述所述 UE从所述码本中为所述 N个第一子带中的 每个第一子带选择一个预编码矩阵的具体实施过程, 具体如下:
在具体实施过程中, 所述 UE接收到所述参考信号之后,在从所述码本中 为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵之 前, 还需从所述 N个第一子带中确定所述 M个第二子带, 在确定所述 M第 二子带之后, 从所述所述码本中为系统传输带宽中的 N个第一子带中的每个 第一子带选择一个预编码矩阵, 其中, 所述 N个第一子带中的每一个第一子 带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二子带包含的所有的第一子带为所述 N个第一子带,且每一个第 一子带仅能够被一个第二子带所包含, 且由于所述 M个第二子带中的每一个 第二子带对应一个第一 PMI, 使得包含有至少两个第一子带的第二子带中包 含的所有第一子带均对应同一个第一 PMI。
具体来讲, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE首先确定所述 M的值, 再根据所述 M的值, 从所述 N个第一子带中确定 所述 M个第二子带, 其中, 所述 UE在确定所述 M的值时, 是根据所述 UE 配置方式来确定的, 例如可以在确定出所述 M的值之后, 将所述 N个第一子 带划分成所述 M个第二子带, 且由于至少存在一个第二子带包含至少两个第 一子带, 使得所述 M的值小于所述 N的值。
具体的, 所述 UE确定所述 M的值的步骤, 具体包括: 所述 UE基于所 述参考信号, 确定信道估计; 所述 UE根据所述信道估计和所述码本, 确定所 述 M的值, 其中, 选择所述 M个第二子带时的系统容量比选择 M-1个第二 子带时的系统容量的容量增益大于门限值, 当然, 还可以是择所述 M个第二 子带比选择 M-1个第二子带时的系统性能增益大于门限值, 所述系统性能包 括系统容量、 系统吞吐量、 系统频谱效率等。
具体的, 所述 UE根据所述信道估计和所述码本, 确定所述 M的值时, 所述门限值才艮据实际情况来确定, 且所述 M的值不大于所述码本中的预编码 矩阵的数量, 例如, 所述预编码矩阵的数量为 5, 则所述 M的值最大为 5, 最 小为 2。
在具体实施过程中, 所述 UE在确定所述 M的值之后, 可以通过连续带 宽划分方式或非连续带宽划分方式, 以此来将所述 N个第一子带划分为所述 M个第二子带, 在以所述连续带宽划分方式划分时, 所述每一个第二子带中 的相邻两个第一子带对应的频率是连续的; 在以所述非连续带宽划分方式划 分时, 所述每一个第二子带中的至少存在一组相邻两个第一子带对应的频率 不连续。
由于 M个第二子带对应有 M个第一 PMI, 使得每一个第一 PMI对应所 述系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部分带宽均有 与之对应的第一 PMI,从而使得 M个第一 PMI覆盖系统传输带宽的波束相位 变化, 降低系统性能损失; 而且由于每一个第一 PMI仅对应所述系统传输带 宽中的一部分, 进而使得波束向量的量化颗粒度精度得以提高。
进一步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI 不相同。
由于所述 M的值是根据所述信道估计和所述码本来确定, 而当不同的 UE所处环境不同, 对应的信道特征参数例如角度扩展、 频率相关性、 空间相 关性不同, 和 /或, 所述码本不同时, 会使得每个 UE对应的第二子带的数量, 即 M值, 可以相同或者不相同。
进一步的, 不同的 UE对应的系统传输带宽可以是相同或不同的, 而且可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带, 从而可以确定不同的 UE对应的 N的值是可以相同或不相同的, 且不同 的 UE对应的第二子带的数量可以相同或不同, 在两个 UE对应的 N值相同, 且 M值不同时,使得所述两个 UE对应的 M个第二子带中每个第二子带包含 第一子带的个数是不相同; 而在两个 UE对应的 N值相同, 且 M值相同时, 使得所述两个 UE对应的 M个第二子带中每个第二子带包含第一子带的个数 可以是相同的, 如此, 使得至少有两个 UE对应的 M个第二子带中每个第二 子带包含第一子带的个数是不相同或相同的。
具体的, 所述 UE确定所述 M个第二子带之后, 从所述码本中为所述 N 个子带中的每一个子带选择一个预编码矩阵,所述 UE将每一个第二子带对应 的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至 所述基站, 使得所述基站能够接收到所述每一个第二子带对应的第一 PMI和 所述每一个第一子带对应的第二 PMI。
其中,所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带或者一 个子带。
进一步地, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编 码等编码方式对将所述 M个第一 PMI进行编码, 将编码后的所述 M个第一 PMI反馈给所述基站, 使得所述基站能够接收到所述每一个第二子带对应的 第一 PMI和所述每一个第一子带对应的第二 PMI。
具体的, UE可以通过 PUCCH或者 PUSCH向基站发送所述第一 PMI和 所述第二 PMI,使得所述基站能够接收到所述每一个第二子带对应的第一 PMI 和所述每一个第一子带对应的第二 PMI。
具体来讲, 由于一个第一 PMI对应一个 Wl 7 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应
例如, 参见图 2和表 1, 所述 UE根据所述信道估计和所述码本, 确定所 述 M的值为 4之后,在以所述连续带宽划分方式将所述 N个第一子带划分成 M个第二子带时, 将子带 0、 子带 1、 子带 2、 子带 3、 子带 4、 子带 5、 子带 6、子带 7、子带 8和子带 9确定 4个第二子带, 所述 4个第二子带为 A子带、 B子带、 C子带和 D子带, 其中, A子带包含子带 0、 子带 1和子带 2, B子 带包含子带 3、 子带 4和子带 5, C子带包含子带 6和子带 7, 以及 D子带包 含子带 8和子带 9, 由于所述 4个第二子带中的每个第二子带对应一个第一 PMI,所述 UE反馈 4个第一 PMI给所述基站,使得所述基站根据用户反馈的 第一 PMI数量确定所述 M的值为 4, 然后釆用与所述 UE相同的方式, 即以 所述连续带宽划分方式将所述 N个第一子带划分成所述 M个第二子带,使得 所述基站可以确定所述 4个第二子带为 A子带、 B子带、 C子带和 D子带, 其中, A子带包含子带 0、 子带 1和子带 2, B子带包含子带 3、 子带 4和子 带 5, C子带包含子带 6和子带 7, 以及 D子带包含子带 8和子带 9。
进一步的,若所述基站根据接收到所述 UE反馈的 A子带对应的第一 PMI 为 4, B子带对应的第一 PMI为 7 , C子带对应的第一 PMI为 9, 以及 D子 带对应的第一 PMI为 11, 以及子带 0对应的第二 PMI为 0, 子带 1对应的第 二 PMI为 2, 子带 2对应的第二 PMI为 9, 子带 3对应的第二 PMI为 3, 子 带 4对应的第二 PMI为 5, 子带 5对应的第二 PMI为 11, 子带 6对应的第二 PMI为 1, 子带 7对应的第二 PMI为 3, 子带 8对应的第二 PMI为 3, 以及子 带 9对应的第二 PMI为 10, 从而可以从表 1中确定子带 0对应的预编码矩阵 为^( 、子带 1对应的预编码矩阵为 W^ 2和子带 2对应的预编码矩阵为 W2( 21, 子带 3对应的预编码矩阵为 、 子带 4对应的预编码矩阵为 W2( u和子带 5 对应的预编码矩阵为 W2 +2,3,子带 6对应的预编码矩阵为 W2 和子带 7对应的 预编码矩阵为 W^, 子带 8对应的预编码矩阵为 和子带 9对应的预编码 矩阵为 W, 2(x11)1+2,2
在具体实施过程中,在所述基站向 UE发送参考信号之后, 所述方法还包 括: 所述基站接收所述 UE上报的所述 M的值。
具体来讲, 所述 UE确定所述 M的值之后, 所述 UE将所述 M的值上报 给所述基站, 以使得所述基站能够接收到所述 M的值, 釆用与所述 UE相同 的方式从所述 N个第一子带中确定所述 M个第二子带。
具体来讲, 由于一个第一 PMI对应一个 Wl 7 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述1^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应 \ (n 。
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。
本发明实施例中,由于本申请技术方案是所述基站接收到所述 UE反馈的 所述 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二子带中的 每一个第二子带对应的第一 PMI, 且 N和 M均为不小于 2的整数, 使得所述 基站会接收到多个第一 PMI, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大的场景时, 可以通过多个第一预编码矩阵来覆盖整 个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预 编码矩阵能够提高波束量化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
另外, 由于 M个 W^o M个第二子带——对应, 使得每一个 W †应所述 系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部分带宽均有与 之对应的 Wl 7 且 M为不小于 2的整数, 使得通过多个 W来覆盖整个系统传 输带宽的波束相位变化, 降低系统性能损失; 而且由于每一个^仅对应所述 系统传输带宽中的一部分, 进而使得波束向量的量化颗粒度精度得以提高。
实施例十
基于与上述预编码矩阵指示的反馈方法相同的技术构思, 本申请实施例 十提供了一种预编码矩阵指示的接收方法, 如图 5 所示, 该方法具体处理过 程如下:
步骤 S501 : 基站向 UE发送参考信号;
步骤 S502: 所述基站接收所述 UE反馈的系统传输带宽中的 N个第一子 带中的每一个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带 对应的第一 PMI,其中,所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数, 所述基站具有一码本, 所述码本至少包含两个预 编码矩阵, 能够根据所述每一个第二子带对应的第一 PMI和所述每一个第一 子带对应的第二 PMI, 从所述码本中选择对应的预编码矩阵。
其中, 在步骤 S501中, 基站向 UE发送参考信号。 在具体实施过程中, 所述参考信号可以包括 CSI RS或者 DM RS或者 CRS。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述基站还可以向所述 UE发送 RRC信 令, 所述 RRC信令中包含有所述参考信号, 使得所述 UE能够基于接收到的 所述 RRC信令, 获取所述参考信号。
接下来执行步骤 S502, 在该步骤中, 所述基站接收所述 UE反馈的系统 传输带宽中的 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二 子带中的每一个第二子带对应的第一 PMI, 其中, 所述 M个第二子带是从所 述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个第二子带包 含至少二个第一子带, N和 M均为不小于 2的正整数,所述基站具有一码本, 所述码本至少包含两个预编码矩阵, 能够根据所述每一个第二子带对应的第 一 PMI和所述每一个第一子带对应的第二 PMI, 从所述码本中选择对应的预 编码矩阵。
其中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系 统传输带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基 站之间的协议中所定义的来确定。
进一步的, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部 分子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第 一子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE 可以通过均勾等分方式或者非等分方式来将所述系统传输带宽分成 N个第一 子带。
在具体实施过程中, 所述基站发送所述参考信号之后, 所述 UE能够接收 到所述参考信号, 再基于所述参考信号, 从所述码本中为所述 N个第一子带 中的每个第一子带选择一个预编码矩阵, 所述码本中的每一个预编码矩阵至 少由第一 PMI和第二 PMI表示, 其中, 所述码本至少包含两个预编码矩阵, 且每个预编码矩阵至少由第一 PMI和第二 PMI表示, 然后将每一个第二子带 对应的第一 PMI和每一个第一子带对应的第二 PMI反馈给所述基站, 使得所 述基站能够接收到所述每一个第二子带对应的第一 PMI和所述每一个第一子 带对应的第二 PMI, 并根据所述每一个第二子带对应的第一 PMI和所述每一 个第一子带对应的第二 PMI, 从所述码本中查找对应的预编码矩阵。
具体来讲, 所述 UE从所述码本中为所述 N个第一子带中的每个第一子 带选择一个预编码矩阵之后, 将每一个第二子带对应的第一 PMI反馈至所述 基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站, 使得所述基 站接收到所述 UE反馈的每一个第二子带对应的第一 PMI和每一个第一子带 对应的第二 PMI, 下面叙述所述 UE从所述码本中为所述 N个第一子带中的 每个第一子带选择一个预编码矩阵的具体实施过程, 具体如下:
在具体实施过程中, 所述 UE接收到所述参考信号之后,在从所述码本中 为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵之 前, 还需从所述 N个第一子带中确定所述 M个第二子带, 在确定所述 M第 二子带之后, 从所述所述码本中为系统传输带宽中的 N个第一子带中的每个 第一子带选择一个预编码矩阵, 其中, 所述 N个第一子带中的每一个第一子 带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二子带包含的所有的第一子带为所述 N个第一子带,且每一个第 一子带仅能够被一个第二子带所包含, 且由于所述 M个第二子带中的每一个 第二子带对应一个第一 PMI, 使得包含有至少两个第一子带的第二子带中包 含的所有第一子带均对应同一个第一 PMI。
其中,所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相 同, 如此, 可以通过不同的第一 PMI来覆盖系统传输带宽的波束相位变化, 进而降低了系统性能损失, 使得波束向量的量化颗粒度精度得以提高, 进一 步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相同。
具体来讲, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE首先确定所述 M的值, 再根据所述 M的值, 从所述 N个第一子带中确定 所述 M个第二子带, 其中, 所述 UE在确定所述 M的值时, 是根据所述 UE 反馈方式来确定的, 在以所述 UE反馈方式来确定所述 M的值时, 所述 M的 值的确定步骤, 具体包括: 所述基站接收所述 UE上报的预选择的 M的值; 所述基站根据所述预选择的 M的值, 确定所述 M的值, 在确定所述 M的值 之后, 所述基站将所述 M的值发送给所述 UE。
具体的, 在通过所述 UE反馈方式确定所述 M的值时, 所述 UE会选择 一个所述预选择的 M的值, 然后将所述预选择的 M的值上报给所述基站, 所 述基站接收到所述预选择的 M的值之后,根据所述预选择的 M的值, 确定所 述 M的值, 所述基站将确定的所述 M的值反馈给所述 UE, 使得所述 UE能 够接收到所述 M的值。
具体的, 所述基站根据所述预选择的 M的值, 确定所述 M的值时, 所述 M的值可以为所述预选择的 M的值, 也可以大于或小于所述预选择的 M的 值, 本申请不作具体限制, 例如, 所述基站接收到所述预选择的 M的值为 3, 则所述 M的值可以为 3, 也可以为大于 3的值, 例如为 4、 5等; 还可以为小 于 3的值, 例如为 2等。
例如, 参见图 4, 用户设备首先会确定所述预选择的 M的值, 所述预选 择的 M的值例如为 2、 3、 4等不小于 2的整数, 然后执行步骤 S401, 发送预 选择的 M的值,使得基站能够接收到所述预选择的 M的值,基站接收到所述 预选择的 M的值之后, 执行步骤 S402, 根据所述预选择的 M的值, 确定所 述 M的值,基站在通过步骤 S402确定所述 M的值之后,接着执行步骤 S403, 反馈所述 M的值,使得用户设备能够接收到基站反馈的所述 M的值, 然后基 于所述 M的值, 从所述 N个第一子带中确定所述 M个第二子带, 具体可以 参考上述方式。 连续带宽划分方式或非连续带宽划分方式, 以此来将所述 N个第一子带划分 为所述 M个第二子带, 在以所述连续带宽划分方式划分时, 所述每一个第二 子带中的相邻两个第一子带对应的频率是连续的; 在以所述非连续带宽划分 方式划分时, 所述每一个第二子带中的至少存在一组相邻两个第一子带对应 的频率不连续。 境不同, 对应的信道特征参数例如角度扩展、 频率相关性、 空间相关性不同, 使得选择的所述预选择的 M的值可以相同或不同, 使得所述基站根据所述预 选择的 M的值确定所述 M的值时,所述 M的值可以为所述预选择的 M的值, 也可以大于或小于所述预选择的 M的值,使得所述 M的值也可以相同或不同, 如此, 使得不同的 UE对应的 M的值可以相同或不相同, 以及使得至少有两 个 UE对应的 M的值也可以相同或不相同。
进一步的, 不同的 UE对应的系统传输带宽可以是相同或不同的, 而且可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带, 从而可以确定不同的 UE对应的 N的值是可以相同或不相同的, 且不同 的 UE对应的第二子带的数量可以相同或不同, 在两个 UE对应的 N值相同, 且 M值不同时,使得所述两个 UE对应的 M个第二子带中每个第二子带包含 第一子带的个数是不相同; 而在两个 UE对应的 N值相同, 且 M值相同时, 使得所述两个 UE对应的 M个第二子带中每个第二子带包含第一子带的个数 可以是相同的, 如此, 使得至少有两个 UE对应的 M个第二子带中每个第二 子带包含第一子带的个数是不相同或相同的。
具体的, 所述 UE确定所述 M个第二子带之后, 从所述码本中为所述 N 个子带中的每一个子带选择一个预编码矩阵,所述 UE将每一个第二子带对应 的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至 所述基站, 使得所述基站能够接收到所述每一个第二子带对应的第一 PMI和 所述每一个第一子带对应的第二 PMI。
其中,所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带或者一 个子带。
进一步地, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编 码等编码方式对将所述 M个第一 PMI进行编码, 将编码后的所述 M个第一 PMI反馈给所述基站, 使得所述基站能够接收到所述每一个第二子带对应的 第一 PMI和所述每一个第一子带对应的第二 PMI。
具体的, UE可以通过 PUCCH或者 PUSCH向基站发送所述第一 PMI和 所述第二 PMI,使得所述基站能够接收到所述每一个第二子带对应的第一 PMI 和所述每一个第一子带对应的第二 PMI。
具体来讲, 由于一个第一 PMI对应一个 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述1^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应
例如, 参见图 4和图 2, 当用户设备将所述预选择的 M的值例如为 5发 送给基站, 基站基于所述预选择的 M的值, 确定所述 M的值为 4, 再将 4发 送给用户设备, 使得用户设备确定所述 M的值为 4, 再以所述连续带宽划分 方式来划分所述 N个第一子带, 则从子带 0、 子带 1、 子带 2、 子带 3、 子带 4、 子带 5、 子带 6、 子带 7、 子带 8和子带 9中确定 4个第二子带, 例如所述 4个第二子带为 A子带、 B子带、 C子带和 D子带,其中, A子带包含子带 0、 子带 1和子带 2, B子带包含子带 3、 子带 4和子带 5, C子带包含子带 6和 子带 7, D子带包含子带 8和子带 9, 同理, 所述基站也釆用连续带宽划分 方式来划分所述 N个第一子带, 从所述 N个第一子带中确定为 A子带、 B子 带、 C子带和 D子带的 4个第二子带, 其中, A、 B、 C和 D子带中的每一个 第二子带包含的每两个相邻的第一子带对应的带宽均是连续的。
进一步的,还参见表 1,若所述基站根据接收到所述 UE反馈的 A子带对 应的第一 PMI为 4, B子带对应的第一 PMI为 7 , C子带对应的第一 PMI为 9, 以及 D子带对应的第一 PMI为 11, 以及子带 0对应的第二 PMI为 0, 子 带 1对应的第二 PMI为 2, 子带 2对应的第二 PMI为 9, 子带 3对应的第二 PMI为 3, 子带 4对应的第二 PMI为 5, 子带 5对应的第二 PMI为 11, 子带 6对应的第二 PMI为 1,子带 7对应的第二 PMI为 3,子带 8对应的第二 PMI 为 3, 以及子带 9对应的第二 PMI为 10, 从而可以从表 1中确定子带 0对应 的预编码矩阵为 W2( 、 子带 1对应的预编码矩阵为 W2 2和子带 2对应的预编 码矩阵为 W^ , 子带 3对应的预编码矩阵为 λ¾3、 子带 4对应的预编码矩阵 为 和子带 5对应的预编码矩阵为 w2H2,3,子带 6对应的预编码矩阵为 w^ 和子带 7对应的预编码矩阵为 w2 3, 子带 8对应的预编码矩阵为 和子带 9对应的预编码矩阵为 当然, 由于一个第一 PMI对应一个 , 使得所述基站可以根据所述 UE 反馈的第一 PMI的数量为 M, 确定所述^的数量也为 M, 并釆用与所述 UE 相同的方式从所述 N个第一子带中确定所述 M个第二子带,第一个 ^对应第 一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N个第 二子带对应 \ (ι¾)。
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。
本发明实施例中,由于本申请技术方案是所述基站接收到所述 UE反馈的 所述 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二子带中的 每一个第二子带对应的第一 PMI, 且 N和 M均为不小于 2的整数, 使得所述 基站会接收到多个第一 PMI, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大的场景时, 可以通过多个第一预编码矩阵来覆盖整 个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预 编码矩阵能够提高波束量化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
实施例十一
基于与上述预编码矩阵指示的反馈方法相同的技术构思, 本申请实施例 十一提供了一种预编码矩阵指示的接收方法, 如图 5 所示, 该方法具体处理 过程如下:
步骤 S501 : 基站向 UE发送参考信号;
步骤 S502: 所述基站接收所述 UE反馈的系统传输带宽中的 N个第一子 带中的每一个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带 对应的第一 PMI,其中,所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数, 所述基站具有一码本, 所述码本至少包含两个预 编码矩阵, 能够根据所述每一个第二子带对应的第一 PMI和所述每一个第一 子带对应的第二 PMI, 从所述码本中选择对应的预编码矩阵。
其中, 在步骤 S501中, 基站向 UE发送参考信号。 在具体实施过程中, 所述参考信号可以包括 CSI RS或者 DM RS或者 CRS。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述基站还可以向所述 UE发送 RRC信 令, 所述 RRC信令中包含有所述参考信号, 使得所述 UE能够基于接收到的 所述 RRC信令, 获取所述参考信号。
接下来执行步骤 S502, 在该步骤中, 所述基站接收所述 UE反馈的系统 传输带宽中的 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二 子带中的每一个第二子带对应的第一 PMI, 其中, 所述 M个第二子带是从所 述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个第二子带包 含至少二个第一子带, N和 M均为不小于 2的正整数,所述基站具有一码本, 所述码本至少包含两个预编码矩阵, 能够根据所述每一个第二子带对应的第 一 PMI和所述每一个第一子带对应的第二 PMI, 从所述码本中选择对应的预 编码矩阵。
其中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系 统传输带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基 站之间的协议中所定义的来确定。
进一步的, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部 分子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第 一子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE 可以通过均勾等分方式或者非等分方式来将所述系统传输带宽分成 N个第一 子带。
在具体实施过程中, 所述基站发送所述参考信号之后, 所述 UE能够接收 到所述参考信号, 再基于所述参考信号, 从所述码本中为所述 N个第一子带 中的每个第一子带选择一个预编码矩阵, 所述码本中的每一个预编码矩阵至 少由第一 PMI和第二 PMI表示, 其中, 所述码本至少包含两个预编码矩阵, 且每个预编码矩阵至少由第一 PMI和第二 PMI表示, 然后将每一个第二子带 对应的第一 PMI和每一个第一子带对应的第二 PMI反馈给所述基站, 使得所 述基站能够接收到所述每一个第二子带对应的第一 PMI和所述每一个第一子 带对应的第二 PMI, 并根据所述每一个第二子带对应的第一 PMI和所述每一 个第一子带对应的第二 PMI, 从所述码本中查找对应的预编码矩阵。
具体来讲, 所述 UE从所述码本中为所述 N个第一子带中的每个第一子 带选择一个预编码矩阵之后, 将每一个第二子带对应的第一 PMI反馈至所述 基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站, 使得所述基 站接收到所述 UE反馈的每一个第二子带对应的第一 PMI和每一个第一子带 对应的第二 PMI, 下面叙述所述 UE从所述码本中为所述 N个第一子带中的 每个第一子带选择一个预编码矩阵的具体实施过程, 具体如下:
在具体实施过程中, 所述 UE接收到所述参考信号之后,在从所述码本中 为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵之 前, 还需从所述 N个第一子带中确定所述 M个第二子带, 在确定所述 M第 二子带之后, 从所述所述码本中为系统传输带宽中的 N个第一子带中的每个 第一子带选择一个预编码矩阵, 其中, 所述 N个第一子带中的每一个第一子 带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二子带包含的所有的第一子带为所述 N个第一子带,且每一个第 一子带仅能够被一个第二子带所包含, 且由于所述 M个第二子带中的每一个 第二子带对应一个第一 PMI, 使得包含有至少两个第一子带的第二子带中包 含的所有第一子带均对应同一个第一 PMI。
其中,所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相 同, 如此, 可以通过不同的第一 PMI来覆盖系统传输带宽的波束相位变化, 进而降低了系统性能损失, 使得波束向量的量化颗粒度精度得以提高, 进一 步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相同。
具体来讲, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE首先确定所述 M的值, 再根据所述 M的值, 从所述 N个第一子带中确定 所述 M个第二子带, 其中, 所述 M的值是所述基站配置的, 即表征所述 M 的值是以所述基站配置方式来确定, 所述基站将以所述基站配置方式确定的 所述 M的值发送给所述 UE, 使得所述 UE接收到所述 M的值, 进而再根据 所述 M的值, 从所述 N个第一子带中确定所述 M个第二子带。
具体的, 在以所述基站配置方式来确定所述 M的值时, 所述基站可以直 接设定所述 M的值, 也可以才艮据所述系统传输带宽, 确定所述 M的值, 例如 所述基站设置的所述 M的值例如为 3、 4、 5等值, 然后所述基站将所述 M的 值发送给所述 UE, 使得所述 UE接收到所述 M的值, 再根据所述 M的值, 从所述 N个第一子带中确定所述 M个第二子带。
具体的, 所述基站根据所述系统传输带宽, 确定所述 M的值时, 例如在 所述系统传输带宽不大于 10MHz时, 所述基站将所述 M的值设置为 3, 4, 5 等值,在所述系统传输带宽大于 10MHz时,所述基站将所述 M的值设置为 4, 5、 6等值, 然后所述基站将所述 M的值发送给所述 UE, 使得所述 UE接收 到所述 M的值, 再根据所述 M的值, 从所述 N个第一子带中确定所述 M个 第二子带。
同理, 所述 UE接收到所述基站配置的所述 M的值之后, 可以通过连续 带宽划分方式或非连续带宽划分方式, 以此来将所述 N个第一子带划分为所 述 M个第二子带, 在以所述连续带宽划分方式划分时, 所述每一个第二子带 中的相邻两个第一子带对应的频率是连续的; 在以所述非连续带宽划分方式 划分时, 所述每一个第二子带中的至少存在一组相邻两个第一子带对应的频 率不连续。
由于所述 M的值是所述基站配置的, 不同的 UE所处环境不同, 对应的 信道特征参数例如角度扩展、 频率相关性、 空间相关性不同, 使得所述基站 配置的所述 M的值可以相同或不同,进而可以确定不同的 UE对应的 M的值 可以相同或不相同, 以及使得至少有两个 UE对应的 M的值也可以相同或不 相同。
进一步的, 不同的 UE对应的系统传输带宽可以是相同或不同的, 而且可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带, 从而可以确定不同的 UE对应的 N的值是可以相同或不相同的, 且不同 的 UE对应的第二子带的数量可以相同或不同, 在两个 UE对应的 N值相同, 且 M值不同时,使得所述两个 UE对应的 M个第二子带中每个第二子带包含 第一子带的个数是不相同; 而在两个 UE对应的 N值相同, 且 M值相同时, 使得所述两个 UE对应的 M个第二子带中每个第二子带包含第一子带的个数 可以是相同的, 如此, 使得至少有两个 UE对应的 M个第二子带中每个第二 子带包含第一子带的个数是不相同或相同的。
具体的, 所述 UE确定所述 M个第二子带之后, 从所述码本中为所述 N 个子带中的每一个子带选择一个预编码矩阵,所述 UE将每一个第二子带对应 的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至 所述基站, 使得所述基站能够接收到所述每一个第二子带对应的第一 PMI和 所述每一个第一子带对应的第二 PMI。
其中,所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带或者一 个子带。
进一步地, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编 码等编码方式对将所述 M个第一 PMI进行编码, 将编码后的所述 M个第一 PMI反馈给所述基站, 使得所述基站能够接收到所述每一个第二子带对应的 第一 PMI和所述每一个第一子带对应的第二 PMI。
具体的,所述 UE可以通过 PUCCH或者 PUSCH向基站发送所述第一 PMI 和所述第二 PMI, 使得所述基站能够接收到所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI。
具体来讲, 由于一个第一 PMI对应一个 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述1^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应
例如, 参见图 2, 若所述系统传输带宽为 10MHz, 所述基站根据所述系 统传输带宽, 确定所述 M的值为 4, 则将所述 M的值反馈给所述 UE, 使得 所述 UE接收到所述基站反馈的所述 M的值, 使得所述 UE确定所述 M的值 为 4, 再以所述非连续带宽划分方式来划分所述 N个第一子带, 从子带 10、 子带 11、 子带 12、 子带 13、 子带 14、 子带 15、 子带 16、 子带 17、 子带 18 和子带 19中确定 4个第二子带,例如所述 4个第二子带为 A1子带、 B1子带、 C1子带和 D1子带, 其中, A1子带包含子带 10、 子带 12和子带 14, B1子 带包含子带 11、 子带 13和子带 15, C1子带包含子带 16和子带 18, D1子带 包含子带 17和子带 19; 同理, 所述基站也釆用所述非连续带宽划分方式来划 分所述 N个第一子带, 从所述 N个第一子带中确定为 A1子带、 B1子带、 C1 子带和 Dl子带的 4个第二子带, 其中, Al、 Bl、 CI和 D1子带中的每一个 第二子带包含的每两个相邻的第一子带对应的带宽均是不连续的。
进一步的, 所述基站还可以根据接收到所述 UE反馈的 Al、 Bl、 CI和 Dl中每个第二子带对应的第二 PMI和子带 10-子带 19中的每个第一子带对应 的第一 PMI, 从所述码本中选择对应的预编码矩阵。
当然, 由于一个第一 PMI对应一个 , 使得所述基站可以根据所述 UE 反馈的第一 PMI的数量为 M, 确定所述1^的数量也为 M, 并釆用与所述 UE 相同的方式从所述 N个第一子带中确定所述 M个第二子带,第一个 W对应第 一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N个第 二子带对应 ^Ν (¾)。
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。
本发明实施例中,由于本申请技术方案是所述基站接收到所述 UE反馈的 所述 Ν个第一子带中的每一个第一子带对应的第二 ΡΜΙ和 Μ个第二子带中的 每一个第二子带对应的第一 ΡΜΙ, 且 Ν和 Μ均为不小于 2的整数, 使得所述 基站会接收到多个第一 ΡΜΙ, 而一个第一 ΡΜΙ对应一个波束相位变化范围, 使得在波束相位变化较大的场景时, 可以通过多个第一预编码矩阵来覆盖整 个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预 编码矩阵能够提高波束量化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
实施例十二
基于与上述预编码矩阵指示的反馈方法相同的技术构思, 本申请实施例 十二提供了一种预编码矩阵指示的接收方法, 如图 5 所示, 该方法具体处理 过程如下:
步骤 S501 : 基站向 UE发送参考信号;
步骤 S502: 所述基站接收所述 UE反馈的系统传输带宽中的 Ν个第一子 带中的每一个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带 对应的第一 PMI,其中,所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数, 所述基站具有一码本, 所述码本至少包含两个预 编码矩阵, 能够根据所述每一个第二子带对应的第一 PMI和所述每一个第一 子带对应的第二 PMI, 从所述码本中选择对应的预编码矩阵。
其中, 在步骤 S501中, 基站向 UE发送参考信号。 在具体实施过程中, 所述参考信号可以包括 CSI RS或者 DM RS或者 CRS。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述基站还可以向所述 UE发送 RRC信 令, 所述 RRC信令中包含有所述参考信号, 使得所述 UE能够基于接收到的 所述 RRC信令, 获取所述参考信号。
接下来执行步骤 S502, 在该步骤中, 所述基站接收所述 UE反馈的系统 传输带宽中的 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二 子带中的每一个第二子带对应的第一 PMI, 其中, 所述 M个第二子带是从所 述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个第二子带包 含至少二个第一子带, N和 M均为不小于 2的正整数,所述基站具有一码本, 所述码本至少包含两个预编码矩阵, 能够根据所述每一个第二子带对应的第 一 PMI和所述每一个第一子带对应的第二 PMI, 从所述码本中选择对应的预 编码矩阵。
其中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系 统传输带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基 站之间的协议中所定义的来确定。
进一步的, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部 分子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第 一子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE 可以通过均勾等分方式或者非等分方式来将所述系统传输带宽分成 N个第一 子带。
在具体实施过程中, 所述基站发送所述参考信号之后, 所述 UE能够接收 到所述参考信号, 再基于所述参考信号, 从所述码本中为所述 N个第一子带 中的每个第一子带选择一个预编码矩阵, 所述码本中的每一个预编码矩阵至 少由第一 PMI和第二 PMI表示,然后将每一个第二子带对应的第一 PMI和每 一个第一子带对应的第二 PMI反馈给所述基站, 使得所述基站能够接收到所 述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI, 并根据所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第 二 PMI, 从所述码本中查找对应的预编码矩阵。
具体来讲, 所述 UE从所述码本中为所述 N个第一子带中的每个第一子 带选择一个预编码矩阵之后, 将每一个第二子带对应的第一 PMI反馈至所述 基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站, 使得所述基 站接收到所述 UE反馈的每一个第二子带对应的第一 PMI和每一个第一子带 对应的第二 PMI, 下面叙述所述 UE从所述码本中为所述 N个第一子带中的 每个第一子带选择一个预编码矩阵的具体实施过程, 具体如下:
在具体实施过程中, 所述 UE接收到所述参考信号之后,在从所述码本中 为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵之 前, 还需从所述 N个第一子带中确定所述 M个第二子带, 在确定所述 M第 二子带之后, 从所述所述码本中为系统传输带宽中的 N个第一子带中的每个 第一子带选择一个预编码矩阵, 其中, 所述 N个第一子带中的每一个第一子 带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二子带包含的所有的第一子带为所述 N个第一子带,且每一个第 一子带仅能够被一个第二子带所包含, 且由于所述 M个第二子带中的每一个 第二子带对应一个第一 PMI, 使得包含有至少两个第一子带的第二子带中包 含的所有第一子带均对应同一个第一 PMI。
其中,所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相 同, 如此, 可以通过不同的第一 PMI来覆盖系统传输带宽的波束相位变化, 进而降低了系统性能损失, 使得波束向量的量化颗粒度精度得以提高, 进一 步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相同。
具体来讲, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE首先确定所述 M的值, 再根据所述 M的值, 从所述 N个第一子带中确定 所述 M个第二子带, 其中, 所述 M的值是以预定义方式来确定的, 在以所述 预定义方式来确定所述 M的值时, 所述 UE和所述基站可以预先设定同一值 为所述 M的值, 例如可以设定所述 M的值为 3、 4、 5等值; 所述 UE还可以 根据所述系统传输带宽, 来设定所述 M的值, 在所述系统传输带宽不大于 10MHz时, 所述 M的值例如为 2、 3、 4等值, 在所述系统传输带宽大于所述 10MHz时, 所述 M的值例如是 3、 4、 5等值。
同理, 所述 UE在以所述预定义方式来确定所述 M的值之后, 可以通过 连续带宽划分方式或非连续带宽划分方式, 以此来将所述 N个第一子带划分 为所述 M个第二子带, 在以所述连续带宽划分方式划分时, 所述每一个第二 子带中的相邻两个第一子带对应的频率是连续的; 在以所述非连续带宽划分 方式划分时, 所述每一个第二子带中的至少存在一组相邻两个第一子带对应 的频率不连续。
由于所述 M的值是所述预定义方式确定的, 不同的 UE所处环境不同, 对应的信道特征参数例如角度扩展、 频率相关性、 空间相关性不同, 使得通
UE对应的 M的值可以相同或不相同, 以及使得至少有两个 UE对应的 M的 值也可以相同或不相同。
进一步的, 不同的 UE对应的系统传输带宽可以是相同或不同的, 而且可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带, 从而可以确定不同的 UE对应的 N的值是可以相同或不相同的, 且不同 的 UE对应的第二子带的数量可以相同或不同, 在两个 UE对应的 N值相同, 且 M值不同时,使得所述两个 UE对应的 M个第二子带中每个第二子带包含 第一子带的个数是不相同; 而在两个 UE对应的 N值相同, 且 M值相同时, 使得所述两个 UE对应的 M个第二子带中每个第二子带包含第一子带的个数 可以是相同的, 如此, 使得至少有两个 UE对应的 M个第二子带中每个第二 子带包含第一子带的个数是不相同或相同的。
具体的, 所述 UE确定所述 M个第二子带之后, 从所述码本中为所述 N 个子带中的每一个子带选择一个预编码矩阵,所述 UE将每一个第二子带对应 的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至 所述基站, 使得所述基站能够接收到所述每一个第二子带对应的第一 PMI和 所述每一个第一子带对应的第二 PMI。
其中,所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带或者一 个子带。
进一步地, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编 码等编码方式对将所述 M个第一 PMI进行编码, 将编码后的所述 M个第一 PMI反馈给所述基站, 使得所述基站能够接收到所述每一个第二子带对应的 第一 PMI和所述每一个第一子带对应的第二 PMI。
具体的,所述 UE可以通过 PUCCH或者 PUSCH向基站发送所述第一 PMI 和所述第二 PMI, 使得所述基站能够接收到所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI。
具体来讲, 由于一个第一 PMI对应一个 Wl 7 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应 ^ (¾)。
例如, 参见图 2, 在所述系统传输带宽为 10MHz时, 所述预定义方式为 每个第二子带包含的第一子带的数量相同,使得所述 UE和所述基站根据所述 预定义方式确定所述 M的值时, 所述 M的值例如可以为 2, 5, 若 M=5, 使 得每一个第二子带包含 2个第一子带, 例如第一个第二子带包含子带 0和子 带 1, 第二个第二子带包含子带 2和子带 3, 第三个第二子带包含子带 4和子 带 5, 第四个第二子带包含子带 6和子带 7, 以及第五个第二子带包含子带 8 和子带 9。
当然, 所述基站也可以根据所述 UE反馈的第一 PMI得到 ^的数量得到 所述 M的值, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 ^对应第一个第二子带, 第二个 ^ 对应第二个第二 子带, 以此类推, 直到第 N个第二子带对应 ^ (¾)。
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。
本发明实施例中,由于本申请技术方案是所述基站接收到所述 UE反馈的 所述 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二子带中的 每一个第二子带对应的第一 PMI, 且 N和 M均为不小于 2的整数, 使得所述 基站会接收到多个第一 PMI, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大的场景时, 可以通过多个第一预编码矩阵来覆盖整 个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预 编码矩阵能够提高波束量化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
实施例十三
基于与上述预编码矩阵指示的反馈方法相同的技术构思, 本申请实施例 十三提供了一种预编码矩阵指示的接收方法, 如图 5 所示, 该方法具体处理 过程如下:
步骤 S501 : 基站向 UE发送参考信号;
步骤 S502: 所述基站接收所述 UE反馈的系统传输带宽中的 N个第一子 带中的每一个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带 对应的第一 PMI,其中,所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数, 所述基站具有一码本, 所述码本至少包含两个预 编码矩阵, 能够根据所述每一个第二子带对应的第一 PMI和所述每一个第一 子带对应的第二 PMI, 从所述码本中选择对应的预编码矩阵。
其中, 在步骤 S501中, 基站向 UE发送参考信号。 在具体实施过程中, 所述参考信号可以包括 CSI RS或者 DM RS或者 CRS。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述基站还可以向所述 UE发送 RRC信 令, 所述 RRC信令中包含有所述参考信号, 使得所述 UE能够基于接收到的 所述 RRC信令, 获取所述参考信号。
接下来执行步骤 S502, 在该步骤中, 所述基站接收所述 UE反馈的系统 传输带宽中的 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二 子带中的每一个第二子带对应的第一 PMI, 其中, 所述 M个第二子带是从所 述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个第二子带包 含至少二个第一子带, N和 M均为不小于 2的正整数,所述基站具有一码本, 所述码本至少包含两个预编码矩阵, 能够根据所述每一个第二子带对应的第 一 PMI和所述每一个第一子带对应的第二 PMI, 从所述码本中选择对应的预 编码矩阵。
其中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系 统传输带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基 站之间的协议中所定义的来确定。
进一步的, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部 分子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第 一子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE 可以通过均勾等分方式或者非等分方式来将所述系统传输带宽分成 N个第一 子带。
在具体实施过程中, 所述基站发送所述参考信号之后, 所述 UE能够接收 到所述参考信号, 再基于所述参考信号, 从所述码本中为所述 N个第一子带 中的每个第一子带选择一个预编码矩阵, 所述码本中的每一个预编码矩阵至 少由第一 PMI和第二 PMI表示,然后将每一个第二子带对应的第一 PMI和每 一个第一子带对应的第二 PMI反馈给所述基站, 使得所述基站能够接收到所 述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI, 并根据所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第 二 PMI, 从所述码本中查找对应的预编码矩阵。
具体来讲, 所述 UE从所述码本中为所述 N个第一子带中的每个第一子 带选择一个预编码矩阵之后, 将每一个第二子带对应的第一 PMI反馈至所述 基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站, 使得所述基 站接收到所述 UE反馈的每一个第二子带对应的第一 PMI和每一个第一子带 对应的第二 PMI, 下面叙述所述 UE从所述码本中为所述 N个第一子带中的 每个第一子带选择一个预编码矩阵的具体实施过程, 具体如下:
在具体实施过程中, 所述 UE接收到所述参考信号之后,在从所述码本中 为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵之 前, 还需从所述 N个第一子带中确定所述 M个第二子带, 在确定所述 M第 二子带之后, 从所述所述码本中为系统传输带宽中的 N个第一子带中的每个 第一子带选择一个预编码矩阵, 其中, 所述 N个第一子带中的每一个第一子 带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二子带包含的所有的第一子带为所述 N个第一子带,且每一个第 一子带仅能够被一个第二子带所包含, 且由于所述 M个第二子带中的每一个 第二子带对应一个第一 PMI, 使得包含有至少两个第一子带的第二子带中包 含的所有第一子带均对应同一个第一 PMI。
其中,所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相 同, 如此, 可以通过不同的第一 PMI来覆盖系统传输带宽的波束相位变化, 进而降低了系统性能损失, 使得波束向量的量化颗粒度精度得以提高, 进一 步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相同。
具体来讲, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE首先确定所述 M个第二子带中的每个第二子带包含的第一子带的个数, 再根据每个第二子带包含的第一子带的个数, 从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 UE在每个第二子带包含的第一子带的个数时, 是根据所述 UE配置方式来确定的。
具体的,在根据所述 UE配置方式来确定每个第二子带包含第一子带的个 数时, 所述 UE可以根据所述 N个第一子带来确定所述每个第二子带包含第 一子带的个数, 例如可以将所述 M个第二子带中的每个第二子带包含的第一 子带的个数为同一个值, 也可以将所述 M个第二子带中的每个第二子带包含 的第一子带的个数为不同的值或部分相同的值。
进一步的,所述 UE在根据所述 UE配置方式来确定每个第二子带包含第 一子带的个数之后, 可以通过连续带宽划分方式或非连续带宽划分方式, 以 此来将所述 N个第一子带划分为所述 M个第二子带,在以所述连续带宽划分 方式划分时, 所述每一个第二子带中的相邻两个第一子带对应的频率是连续 的; 在以所述非连续带宽划分方式划分时, 所述每一个第二子带中的至少存 在一组相邻两个第一子带对应的频率不连续。
由于本实施例在根据所述 UE配置方式来确定每个第二子带包含第一子 带的个数时, 是根据所述 N个第一子带来确定每个第二子带包含第一子带的 个数, 不同的 UE所处环境不同, 对应的 N的值也可以相同或不同, 使得通 过所述 UE配置方式确定的每个第二子带包含第一子带的个数,可以相同或不 同, 进而可以确定不同的 UE对应的 M个第二子带中每个第二子带包含第一 子带的个数可以相同或不相同, 以及使得至少有两个 UE对应的 M个第二子 带中每个第二子带包含第一子带的个数不相同。
具体的, 所述 UE确定所述 M个第二子带之后, 从所述码本中为所述 N 个子带中的每一个子带选择一个预编码矩阵,所述 UE将每一个第二子带对应 的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至 所述基站, 使得所述基站能够接收到所述每一个第二子带对应的第一 PMI和 所述每一个第一子带对应的第二 PMI。
其中,所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带或者一 个子带。
进一步地, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编 码等编码方式对将所述 M个第一 PMI进行编码, 将编码后的所述 M个第一 PMI反馈给所述基站, 使得所述基站能够接收到所述每一个第二子带对应的 第一 PMI和所述每一个第一子带对应的第二 PMI。
具体的,所述 UE可以通过 PUCCH或者 PUSCH向基站发送所述第一 PMI 和所述第二 PMI, 使得所述基站能够接收到所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI。
具体来讲,所述基站根据所述 UE反馈的第一 PMI得到 的数量为 M时, 釆用与所述 UE相同方式从所述 N个第一子带中确定所述 M个第二子带, 第 一个 W †应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N个第二子带对应 \ (1¾)。
具体的, 所述基站也可以根据所述 UE反馈的第一 PMI得到 ^的数量得 到所述 M的值, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所 述 M个第二子带, 第一个 W †应第一个第二子带, 第二个 ^ 对应第二个第 二子带, 以此类推, 直到第 N个第二子带对应 \¥^ (!¾)。
例如, 参见图 2, 所述 UE根据子带 0、 子带 1、 子带 2、 子带 3、 子带 4、 子带 5、 子带 6、 子带 7、 子带 8和子带 9中确定所述 M个第二子带中每个第 二子带包含的第一子带的个数时, 若每个第二子带包含的第一子带的个数为 同一个值, 则可以确定每个第二子带包含的第一子带的个数可以为 2或 5, 在 每个第二子带包含的第一子带的个数为 2时, 若以所述连续带宽划分方式划 分, 使得将所述 N个第一子带划分为 5个第二子带, 其中, 所述 5个第二子 带中的第一个第二子带包含子带 0和子带 1,第二个第二子带包含子带 2和子 带 3, 第三个第二子带包含子带 4和子带 5, 第四个第二子带包含子带 6和子 带 7, 以及第五个第二子带包含子带 8和子带 9, 如此, 使得所述 UE会发送 5个第一 PMI给所述基站, 使得所述基站根据所述第一 PMI的数量确定所述 M的值为 5, 然后釆用与所述 UE相同的方式来确定所述 M个第二子带, 即 将每个第二子带包含的第一子带的个数为同一个值, 从而可以确定 N个第一 子带划分为 5个第二子带,所述 5个第二子带中的第一个第二子带包含子带 0 和子带 1, 第二个第二子带包含子带 2和子带 3, 第三个第二子带包含子带 4 和子带 5, 第四个第二子带包含子带 6和子带 7, 以及第五个第二子带包含子 带 8和子带 9, 其中, 所述每一个第二子带中的相邻两个第一子带对应的频率 是连续的。
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。
在另一实施例中,在所述基站向 UE发送参考信号之后,所述方法还包括: 所述基站接收所述 UE上报的所述 M个第二子带中每个第二子带包含的第一 子带的个数。
在具体实施过程中, 在所述基站未获取到所述 M个第二子带中每个第二 子带包含的第一子带的个数时, 所述 UE可以将所述 M个第二子带中每个第 二子带包含的第一子带的个数上报给所述基站。
由于所述 UE根据接收到的所述基站发送的参考信号,从码本中为系统传 输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵时,所述 UE 还可以将所述 M个第二子带中每个第二子带包含的第一子带的个数上报给所 述基站, 使得所述基站在接收所述 UE反馈的第一 PMI和第二 PMI之前, 就 已经釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子 带, 以使得再接收到所述 UE反馈的第一 PMI和第二 PMI时, 能够更快的获 取到与每一个第一子带对应的预编码矩阵, 使得工作效率得以提高。 本发明实施例中,由于本申请技术方案是所述基站接收到所述 UE反馈的 所述 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二子带中的 每一个第二子带对应的第一 PMI, 且 N和 M均为不小于 2的整数, 使得所述 基站会接收到多个第一 PMI, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大的场景时, 可以通过多个第一预编码矩阵来覆盖整 个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预 编码矩阵能够提高波束量化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
实施例十四
基于与上述预编码矩阵指示的反馈方法相同的技术构思, 本申请实施例 十四提供了一种预编码矩阵指示的接收方法, 如图 5 所示, 该方法具体处理 过程如下:
步骤 S501 : 基站向 UE发送参考信号;
步骤 S502: 所述基站接收所述 UE反馈的系统传输带宽中的 N个第一子 带中的每一个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带 对应的第一 PMI,其中,所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数, 所述基站具有一码本, 所述码本至少包含两个预 编码矩阵, 能够根据所述每一个第二子带对应的第一 PMI和所述每一个第一 子带对应的第二 PMI, 从所述码本中选择对应的预编码矩阵。
其中, 在步骤 S501中, 基站向 UE发送参考信号。 在具体实施过程中, 所述参考信号可以包括 CSI RS或者 DM RS或者 CRS。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述基站还可以向所述 UE发送 RRC信 令, 所述 RRC信令中包含有所述参考信号, 使得所述 UE能够基于接收到的 所述 RRC信令, 获取所述参考信号。 接下来执行步骤 S502, 在该步骤中, 所述基站接收所述 UE反馈的系统 传输带宽中的 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二 子带中的每一个第二子带对应的第一 PMI, 其中, 所述 M个第二子带是从所 述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个第二子带包 含至少二个第一子带, N和 M均为不小于 2的正整数,所述基站具有一码本, 所述码本至少包含两个预编码矩阵, 能够根据所述每一个第二子带对应的第 一 PMI和所述每一个第一子带对应的第二 PMI, 从所述码本中选择对应的预 编码矩阵。
其中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系 统传输带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基 站之间的协议中所定义的来确定。
进一步的, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部 分子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第 一子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE 可以通过均勾等分方式或者非等分方式来将所述系统传输带宽分成 N个第一 子带。
在具体实施过程中, 所述基站发送所述参考信号之后, 所述 UE能够接收 到所述参考信号, 再基于所述参考信号, 从所述码本中为所述 N个第一子带 中的每个第一子带选择一个预编码矩阵, 所述码本中的每一个预编码矩阵至 少由第一 PMI和第二 PMI表示,然后将每一个第二子带对应的第一 PMI和每 一个第一子带对应的第二 PMI反馈给所述基站, 使得所述基站能够接收到所 述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI, 并根据所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第 二 PMI, 从所述码本中查找对应的预编码矩阵。
具体来讲, 所述 UE从所述码本中为所述 N个第一子带中的每个第一子 带选择一个预编码矩阵之后, 将每一个第二子带对应的第一 PMI反馈至所述 基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站, 使得所述基 站接收到所述 UE反馈的每一个第二子带对应的第一 PMI和每一个第一子带 对应的第二 PMI, 下面叙述所述 UE从所述码本中为所述 N个第一子带中的 每个第一子带选择一个预编码矩阵的具体实施过程, 具体如下:
在具体实施过程中, 所述 UE接收到所述参考信号之后,在从所述码本中 为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵之 前, 还需从所述 N个第一子带中确定所述 M个第二子带, 在确定所述 M第 二子带之后, 从所述所述码本中为系统传输带宽中的 N个第一子带中的每个 第一子带选择一个预编码矩阵, 其中, 所述 N个第一子带中的每一个第一子 带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二子带包含的所有的第一子带为所述 N个第一子带,且每一个第 一子带仅能够被一个第二子带所包含, 且由于所述 M个第二子带中的每一个 第二子带对应一个第一 PMI, 使得包含有至少两个第一子带的第二子带中包 含的所有第一子带均对应同一个第一 PMI。
其中,所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相 同, 如此, 可以通过不同的第一 PMI来覆盖系统传输带宽的波束相位变化, 进而降低了系统性能损失, 使得波束向量的量化颗粒度精度得以提高, 进一 步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相同。
具体来讲, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE首先确定所述 M个第二子带中的每个第二子带包含的第一子带的个数, 再根据每个第二子带包含的第一子带的个数, 从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 UE在每个第二子带包含的第一子带的个数时, 是根据所述 UE反馈方式来确定的。
具体的, 在所述 M个第二子带中的每个第二子带包含的第一子带的个数 是根据所述 UE反馈方式来确定时,所述 UE将预选择的每个第二子带包含的 第一子带的个数上报给所述基站; 所述基站根据所述预选择的每个第二子带 包含的第一子带的个数, 确定所述 M个第二子带中的每个第二子带包含的第 一子带的个数, 并将每个第二子带包含第一子带的个数反馈给所述 UE, 使得 所述 UE根据每个第二子带包含第一子带的个数, 从所述 N个第一子带中确 定所述 M个第二子带。
具体的, 所述基站根据所述预选择的每个第二子带包含的第一子带的个 数, 确定所述每个第二子带包含的第一子带的个数时, 所述每个第二子带包 含的第一子带的个数与所述预选择的每个第二子带包含的第一子带的个数相 同或不同。
例如, 参见图 2, 所述 UE根据为 10MHz的所述系统传输带宽, 确定出 预选择的所述 M个第二子带中每个第二子带包含第一子带的个数为 3、 3、 2 和 2, 所述基站根据接收到的 3、 3、 2和 2, 例如可以确定所述 M个第二子带 中每个第二子带包含第一子带的个数例如可以为 3、 3、 2和 2, 3、 3、 3和 1、 4、 2、 2和 2等, 所述基站再将确定出的每个第二子带包含第一子带的个数反 馈给所述 UE, 使得所述 UE能够接收到所述基站发送的每个第二子带包含第 一子带的个数。
进一步的,所述 UE在根据所述 UE反馈方式来确定每个第二子带包含第 一子带的个数之后, 可以通过连续带宽划分方式或非连续带宽划分方式, 以 此来将所述 N个第一子带划分为所述 M个第二子带,在以所述连续带宽划分 方式划分时, 所述每一个第二子带中的相邻两个第一子带对应的频率是连续 的; 在以所述非连续带宽划分方式划分时, 所述每一个第二子带中的至少存 在一组相邻两个第一子带对应的频率不连续。
例如, 参见图 2, 所述 UE根据为 10MHz的所述系统传输带宽, 确定出 预选择的所述 M个第二子带中每个第二子带包含第一子带的个数为 3、 3、 2 和 2, 并将 3、 3、 2和 2发送给所述基站, 所述基站基于 3、 3、 2和 2确定出 每个第二子带包含第一子带的个数例如可以为 3、 3、 3和 1, 然后将 3、 3、 3 和 1发送给所述 UE, 所述 UE基于 3、 3、 3和 1, 以连续带宽方式来划分子 带 0、 子带 1、 子带 2、 子带 3、 子带 4、 子带 5、 子带 6、 子带 7、 子带 8和 子带 9, 进而获得 4个第二子带, 所述 4个第二子带中的第一个第二子带包含 子带 0、 子带 1和子带 2, 第二个第二子带包含子带子带 3、 子带 4和子带 5, 第三个第二子带包含带 6、 子带 7和子带 8, 第四个第二子带包含子带 9, 其 中, 除所述第四个第二子带中仅有一个第一子带外, 其它 3个第二子带中每 个第二子带中的相邻两个第一子带对应的频率是连续的。
由于本申请实施例是根据所述 UE反馈方式来确定每个第二子带包含第 一子带的个数时, 不同的 UE所处环境不同, 对应的信道特征参数例如角度 扩展、 频率相关性、 空间相关性不同, 使得选择的所述预选择的每个第二子 带包含第一子带的个数可以相同或不同, 使得所述基站根据所述预选择的每 个第二子带包含第一子带的个数来确定每个第二子带包含第一子带的个数 时, 每个第二子带包含第一子带的个数可以与所述预选择的每个第二子带包 含第一子带的个数相同或不同, 使得每个第二子带包含第一子带的个数也可 以相同或不同, 如此, 使得不同的 UE对应的 M个第二子带中每个第二子带 包含第一子带的个数可以相同或不相同, 以及使得至少有两个 UE对应的 M 个第二子带中每个第二子带包含第一子带的个数不相同。
具体的, 所述 UE确定所述 M个第二子带之后, 从所述码本中为所述 N 个子带中的每一个子带选择一个预编码矩阵,所述 UE将每一个第二子带对应 的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至 所述基站, 使得所述基站能够接收到所述每一个第二子带对应的第一 PMI和 所述每一个第一子带对应的第二 PMI。
其中,所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带或者一 个子带。
进一步地, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编 码等编码方式对将所述 M个第一 PMI进行编码, 将编码后的所述 M个第一 PMI反馈给所述基站, 使得所述基站能够接收到所述每一个第二子带对应的 第一 PMI和所述每一个第一子带对应的第二 PMI。
具体的,所述 UE可以通过 PUCCH或者 PUSCH向基站发送所述第一 PMI 和所述第二 PMI, 使得所述基站能够接收到所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI。
具体来讲,所述基站根据所述 UE反馈的第一 PMI得到 的数量为 M时, 釆用与所述 UE相同方式从所述 N个第一子带中确定所述 M个第二子带, 第 一个 W †应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N个第二子带对应 \¥^ (!¾)。
例如, 参见图 2, 所述 UE根据为 10MHz的所述系统传输带宽, 确定出 预选择的所述 M个第二子带中每个第二子带包含第一子带的个数为 3、 3、 2 和 2, 并将 3、 3、 2和 2发送给所述基站, 所述基站基于 3、 3、 2和 2确定出 每个第二子带包含第一子带的个数例如可以为 3、 3、 3和 1, 然后将 3、 3、 3 和 1发送给所述 UE,所述 UE和所述基站釆用相同的方式来确定所述 M个第 二子带, 根据 3、 3、 3和 1, 将子带 0、 子带 1、 子带 2、 子带 3、 子带 4、 子 带 5、 子带 6、 子带 7、 子带 8和子带 9, 进而获得 4个第二子带, 所述 4个 第二子带中的第一个第二子带包含子带 0、 子带 1和子带 2, 第二个第二子带 包含子带子带 3、 子带 4和子带 5, 第三个第二子带包含带 6、 子带 7和子带 8, 第四个第二子带包含子带 9, 其中, 除所述第四个第二子带中仅有一个第 一子带外, 其它 3个第二子带中每个第二子带中的相邻两个第一子带对应的 频率是连续的。
具体的, 由于一个第一 PMI对应一个 Wl 7 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应 ^ (¾)。
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。
本发明实施例中,由于本申请技术方案是所述基站接收到所述 UE反馈的 所述 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二子带中的 每一个第二子带对应的第一 PMI, 且 N和 M均为不小于 2的整数, 使得所述 基站会接收到多个第一 PMI, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大的场景时, 可以通过多个第一预编码矩阵来覆盖整 个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预 编码矩阵能够提高波束量化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
实施例十五
基于与上述预编码矩阵指示的反馈方法相同的技术构思, 本申请实施例 十五提供了一种预编码矩阵指示的接收方法, 如图 5 所示, 该方法具体处理 过程如下:
步骤 S501 : 基站向 UE发送参考信号;
步骤 S502: 所述基站接收所述 UE反馈的系统传输带宽中的 N个第一子 带中的每一个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带 对应的第一 PMI,其中,所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数, 所述基站具有一码本, 所述码本至少包含两个预 编码矩阵, 能够根据所述每一个第二子带对应的第一 PMI和所述每一个第一 子带对应的第二 PMI, 从所述码本中选择对应的预编码矩阵。
其中, 在步骤 S501中, 基站向 UE发送参考信号。 在具体实施过程中, 所述参考信号可以包括 CSI RS或者 DM RS或者 CRS。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述基站还可以向所述 UE发送 RRC信 令, 所述 RRC信令中包含有所述参考信号, 使得所述 UE能够基于接收到的 所述 RRC信令, 获取所述参考信号。
接下来执行步骤 S502, 在该步骤中, 所述基站接收所述 UE反馈的系统 传输带宽中的 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二 子带中的每一个第二子带对应的第一 PMI, 其中, 所述 M个第二子带是从所 述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个第二子带包 含至少二个第一子带, N和 M均为不小于 2的正整数,所述基站具有一码本, 所述码本至少包含两个预编码矩阵, 能够根据所述每一个第二子带对应的第 一 PMI和所述每一个第一子带对应的第二 PMI, 从所述码本中选择对应的预 编码矩阵。
其中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系 统传输带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基 站之间的协议中所定义的来确定。
进一步的, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部 分子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第 一子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE 可以通过均勾等分方式或者非等分方式来将所述系统传输带宽分成 N个第一 子带。
在具体实施过程中, 所述基站发送所述参考信号之后, 所述 UE能够接收 到所述参考信号, 再基于所述参考信号, 从所述码本中为所述 N个第一子带 中的每个第一子带选择一个预编码矩阵, 所述码本中的每一个预编码矩阵至 少由第一 PMI和第二 PMI表示,然后将每一个第二子带对应的第一 PMI和每 一个第一子带对应的第二 PMI反馈给所述基站, 使得所述基站能够接收到所 述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI, 并根据所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第 二 PMI, 从所述码本中查找对应的预编码矩阵。
具体来讲, 所述 UE从所述码本中为所述 N个第一子带中的每个第一子 带选择一个预编码矩阵之后, 将每一个第二子带对应的第一 PMI反馈至所述 基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站, 使得所述基 站接收到所述 UE反馈的每一个第二子带对应的第一 PMI和每一个第一子带 对应的第二 PMI, 下面叙述所述 UE从所述码本中为所述 N个第一子带中的 每个第一子带选择一个预编码矩阵的具体实施过程, 具体如下:
在具体实施过程中, 所述 UE接收到所述参考信号之后,在从所述码本中 为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵之 前, 还需从所述 N个第一子带中确定所述 M个第二子带, 在确定所述 M第 二子带之后, 从所述所述码本中为系统传输带宽中的 N个第一子带中的每个 第一子带选择一个预编码矩阵, 其中, 所述 N个第一子带中的每一个第一子 带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二子带包含的所有的第一子带为所述 N个第一子带,且每一个第 一子带仅能够被一个第二子带所包含, 且由于所述 M个第二子带中的每一个 第二子带对应一个第一 PMI, 使得包含有至少两个第一子带的第二子带中包 含的所有第一子带均对应同一个第一 PMI。
其中,所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相 同, 如此, 可以通过不同的第一 PMI来覆盖系统传输带宽的波束相位变化, 进而降低了系统性能损失, 使得波束向量的量化颗粒度精度得以提高, 进一 步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相同。
具体来讲, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE首先确定所述 M个第二子带中的每个第二子带包含的第一子带的个数, 再根据每个第二子带包含的第一子带的个数, 从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 UE在每个第二子带包含的第一子带的个数时, 是根据所述基站配置方式来确定的。
具体的, 在所述 M个第二子带中的每个第二子带包含的第一子带的个数 是根据所述基站配置方式来确定时, 所述基站可以根据所述 N个第一子带, 对所述 M个第二子带中的每个第二子带包含的第一子带的个数进行配置, 所 述基站在配置所述 M个第二子带中的每个第二子带包含的第一子带的个数之 后, 将所述 M个第二子带中的每个第二子带包含的第一子带的个数反馈给所 述 UE,使得所述 UE根据所述 M个第二子带中的每个第二子带包含的第一子 带的个数, 从所述 N个第一子带中确定所述 M个第二子带。 具体的, 在根据所述基站配置方式来确定每个第二子带包含第一子带的 个数时, 所述基站可以根据所述 N个第一子带来确定所述每个第二子带包含 第一子带的个数, 例如可以将所述 M个第二子带中的每个第二子带包含的第 一子带的个数为同一个值, 也可以将所述 M个第二子带中的每个第二子带包 含的第一子带的个数为不同的值或部分相同的值。
例如, 参见图 2, 所述基站根据子带 0、 子带 1、 子带 2、 子带 3、 子带 4、 子带 5、 子带 6、 子带 7、 子带 8和子带 9中确定所述 M个第二子带中每个第 二子带包含的第一子带的个数时, 若每个第二子带包含的第一子带的个数为 同一个值, 则可以确定每个第二子带包含的第一子带的个数可以为 2或 5。
进一步的, 所述基站根据所述基站配置方式确定每个第二子带包含第一 子带的个数, 并将每个第二子带包含第一子带的个数发送给所述 UE, 使得所 述 UE接收到所述基站反馈的每个第二子带包含第一子带的个数,在接收到所 述基站反馈的每个第二子带包含第一子带的个数之后, 可以通过连续带宽划 分方式或非连续带宽划分方式, 以此来将所述 N个第一子带划分为所述 M个 第二子带, 在以所述连续带宽划分方式划分时, 所述每一个第二子带中的相 邻两个第一子带对应的频率是连续的; 在以所述非连续带宽划分方式划分时, 所述每一个第二子带中的至少存在一组相邻两个第一子带对应的频率不连 续。
例如, 参见图 2, 所述基站根据子带 0、 子带 1、 子带 2、 子带 3、 子带 4、 子带 5、 子带 6、 子带 7、 子带 8和子带 9中确定所述 M个第二子带中每个第 二子带包含的第一子带的个数时, 若每个第二子带包含的第一子带的个数为 同一个值, 则可以确定每个第二子带包含的第一子带的个数可以为 2或 5, 若 每个第二子带包含的第一子带的个数为 2,所述基站将每个第二子带包含的第 一子带的个数为 2反馈给所述 UE, 所述 UE根据每个第二子带包含的第一子 带的个数为 2, 以所述连续带宽划分方式进行划分, 使得将所述 N个第一子 带划分为 5个第二子带, 其中, 所述 5个第二子带中的第一个第二子带包含 子带 0和子带 1, 第二个第二子带包含子带 2和子带 3, 第三个第二子带包含 子带 4和子带 5, 第四个第二子带包含子带 6和子带 7, 以及第五个第二子带 包含子带 8和子带 9, 其中, 所述每一个第二子带中的相邻两个第一子带对应 的频率是连续的。
由于本实施例在根据所述基站配置方式来确定每个第二子带包含第一子 带的个数时, 是根据所述 N个第一子带来确定每个第二子带包含第一子带的 个数, 不同的 UE所处环境不同, 对应的 N的值也可以相同或不同, 使得通 过所述基站配置方式确定的每个第二子带包含第一子带的个数, 可以相同或 不同, 进而可以确定不同的 UE对应的 M个第二子带中每个第二子带包含第 一子带的个数可以相同或不相同, 以及使得至少有两个 UE对应的 M个第二 子带中每个第二子带包含第一子带的个数不相同。
具体的, 所述 UE确定所述 M个第二子带之后, 从所述码本中为所述 N 个子带中的每一个子带选择一个预编码矩阵,所述 UE将每一个第二子带对应 的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至 所述基站, 使得所述基站能够接收到所述每一个第二子带对应的第一 PMI和 所述每一个第一子带对应的第二 PMI。
其中,所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带或者一 个子带。
进一步地, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编 码等编码方式对将所述 M个第一 PMI进行编码, 将编码后的所述 M个第一 PMI反馈给所述基站, 使得所述基站能够接收到所述每一个第二子带对应的 第一 PMI和所述每一个第一子带对应的第二 PMI。
具体的,所述 UE可以通过 PUCCH或者 PUSCH向基站发送所述第一 PMI 和所述第二 PMI, 使得所述基站能够接收到所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI。
具体来讲, 由于一个第一 PMI对应一个 Wl 7 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述1^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应 \ (n 。
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。
本发明实施例中,由于本申请技术方案是所述基站接收到所述 UE反馈的 所述 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二子带中的 每一个第二子带对应的第一 PMI, 且 N和 M均为不小于 2的整数, 使得所述 基站会接收到多个第一 PMI, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大的场景时, 可以通过多个第一预编码矩阵来覆盖整 个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预 编码矩阵能够提高波束量化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
实施例十六
基于与上述预编码矩阵指示的反馈方法相同的技术构思, 本申请实施例 十六提供了一种预编码矩阵指示的接收方法, 如图 5 所示, 该方法具体处理 过程如下:
步骤 S501 : 基站向 UE发送参考信号;
步骤 S502: 所述基站接收所述 UE反馈的系统传输带宽中的 N个第一子 带中的每一个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带 对应的第一 PMI,其中,所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数, 所述基站具有一码本, 所述码本至少包含两个预 编码矩阵, 能够根据所述每一个第二子带对应的第一 PMI和所述每一个第一 子带对应的第二 PMI, 从所述码本中选择对应的预编码矩阵。 其中, 在步骤 S501中, 基站向 UE发送参考信号。 在具体实施过程中, 所述参考信号可以包括 CSI RS或者 DM RS或者 CRS。
具体的, 所述基站在子帧上可以通过物理下行控制信道发送下行控制信 息给所述 UE, 使得所述 UE能够接收到所述下行控制信息, 根据所述下行控 制信息, 获取所述参考信号, 当然, 所述基站还可以向所述 UE发送 RRC信 令, 所述 RRC信令中包含有所述参考信号, 使得所述 UE能够基于接收到的 所述 RRC信令, 获取所述参考信号。
接下来执行步骤 S502, 在该步骤中, 所述基站接收所述 UE反馈的系统 传输带宽中的 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二 子带中的每一个第二子带对应的第一 PMI, 其中, 所述 M个第二子带是从所 述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个第二子带包 含至少二个第一子带, N和 M均为不小于 2的正整数,所述基站具有一码本, 所述码本至少包含两个预编码矩阵, 能够根据所述每一个第二子带对应的第 一 PMI和所述每一个第一子带对应的第二 PMI, 从所述码本中选择对应的预 编码矩阵。
其中,所述系统传输带宽为配置给所述 UE用于信道测量的一个载波的系 统传输带宽, 所述系统传输带宽中的 N个第一子带是根据所述 UE和所述基 站之间的协议中所定义的来确定。
进一步的, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部 分子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第 一子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE 可以通过均勾等分方式或者非等分方式来将所述系统传输带宽分成 N个第一 子带。
在具体实施过程中, 所述基站发送所述参考信号之后, 所述 UE能够接收 到所述参考信号, 再基于所述参考信号, 从所述码本中为所述 N个第一子带 中的每个第一子带选择一个预编码矩阵, 所述码本中的每一个预编码矩阵至 少由第一 PMI和第二 PMI表示,然后将每一个第二子带对应的第一 PMI和每 一个第一子带对应的第二 PMI反馈给所述基站, 使得所述基站能够接收到所 述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI, 并根据所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第 二 PMI, 从所述码本中查找对应的预编码矩阵。
具体来讲, 所述 UE从所述码本中为所述 N个第一子带中的每个第一子 带选择一个预编码矩阵之后, 将每一个第二子带对应的第一 PMI反馈至所述 基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站, 使得所述基 站接收到所述 UE反馈的每一个第二子带对应的第一 PMI和每一个第一子带 对应的第二 PMI, 下面叙述所述 UE从所述码本中为所述 N个第一子带中的 每个第一子带选择一个预编码矩阵的具体实施过程, 具体如下:
在具体实施过程中, 所述 UE接收到所述参考信号之后,在从所述码本中 为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵之 前, 还需从所述 N个第一子带中确定所述 M个第二子带, 在确定所述 M第 二子带之后, 从所述所述码本中为系统传输带宽中的 N个第一子带中的每个 第一子带选择一个预编码矩阵, 其中, 所述 N个第一子带中的每一个第一子 带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二子带包含的所有的第一子带为所述 N个第一子带,且每一个第 一子带仅能够被一个第二子带所包含, 且由于所述 M个第二子带中的每一个 第二子带对应一个第一 PMI, 使得包含有至少两个第一子带的第二子带中包 含的所有第一子带均对应同一个第一 PMI。
其中,所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相 同, 如此, 可以通过不同的第一 PMI来覆盖系统传输带宽的波束相位变化, 进而降低了系统性能损失, 使得波束向量的量化颗粒度精度得以提高, 进一 步的, 所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不相同。
具体来讲, 在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE首先确定所述 M个第二子带中的每个第二子带包含的第一子带的个数, 再根据每个第二子带包含的第一子带的个数, 从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 UE在每个第二子带包含的第一子带的个数时, 是根据所述预定义方式来确定的。
具体的, 在所述 M个第二子带中的每个第二子带包含的第一子带的个数 是根据所述预定义方式来确定时,所述 UE和所述基站均釆用预定义规则来配 置所述 M个第二子带中的每个第二子带包含的第一子带的个数, 所述预定义 规则例如可以是每个第二子带包含的第一子带的个数均相同, 或均不同, 或 部分相同等。
例如, 参见图 2, 所述基站和所述 UE可以根据所述预定义规则来对所述 M个第二子带中每个第二子带包含的第一子带的个数进行配置, 若所述预定 义规则为每个第二子带包含的第一子带的个数部分相同, 则所述 M个第二子 带中每个第二子带包含的第一子带的个数例如为 3、 3、 2和 2, 4、 4、 1和 1 等。
进一步的, 所述 UE根据所述预定义方式确定出所述 M个第二子带中每 个第二子带包含的第一子带的个数之后, 可以通过连续带宽划分方式或非连 续带宽划分方式, 以此来将所述 N个第一子带划分为所述 M个第二子带, 在 以所述连续带宽划分方式划分时, 所述每一个第二子带中的相邻两个第一子 带对应的频率是连续的; 在以所述非连续带宽划分方式划分时, 所述每一个 第二子带中的至少存在一组相邻两个第一子带对应的频率不连续。
例如, 参见图 2, 所述基站和所述 UE可以根据所述预定义规则来对所述 M个第二子带中每个第二子带包含的第一子带的个数进行配置, 若所述预定 义规则为每个第二子带包含的第一子带的个数部分相同, 则可以确定所述 M 个第二子带中每个第二子带包含的第一子带的个数例如为 3、 3、 2和 2, 若以 所述连续带宽划分方式进行划分, 则从子带 0、 子带 1、 子带 2、 子带 3、 子 带 4、 子带 5、 子带 6、 子带 7、 子带 8和子带 9确定出 4个第二子带, 所述 4 个第二子带例如为 A子带、 B子带、 C子带和 D子带, 其中, A子带包含子 带 0、 子带 1和子带 2; B子带包含子带 3、 子带 4和子带 5; C子带包含子带 6和子带 7; D子带包含子带 8和子带 9, 其中, 所述每一个第二子带中的相 邻两个第一子带对应的频率是连续的。
由于本实施例中每个第二子带包含第一子带的个数是根据所述预定义方 式来确定的, 不同的 UE所处环境不同, 对应的信道特征参数例如角度扩展、 频率相关性、 空间相关性不同, 使得通过所述预定义方式确定出的每个第二 子带包含第一子带的个数可以相同或不同,进而可以确定不同的 UE对应的所 述 M个第二子带中的每个第二子带包含第一子带的个数可以相同或不同, 以 及使得至少有两个 UE对应的 M个第二子带中每个第二子带包含第一子带的 个数不相同。
具体的, 所述 UE确定所述 M个第二子带之后, 从所述码本中为所述 N 个子带中的每一个子带选择一个预编码矩阵,所述 UE将每一个第二子带对应 的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至 所述基站, 使得所述基站能够接收到所述每一个第二子带对应的第一 PMI和 所述每一个第一子带对应的第二 PMI。
其中,所述第一 PMI和所述第二 PMI具有不同的时间域或者频域颗粒度, 例如所述第一 PMI对应于整个频率带宽, 所述第二 PMI对应整个频带或者一 个子带。
进一步地, 在反馈所述 M个第一 PMI时, 可以通过联合编码或者差分编 码等编码方式对将所述 M个第一 PMI进行编码, 将编码后的所述 M个第一 PMI反馈给所述基站, 使得所述基站能够接收到所述每一个第二子带对应的 第一 PMI和所述每一个第一子带对应的第二 PMI。
具体的,所述 UE可以通过 PUCCH或者 PUSCH向基站发送所述第一 PMI 和所述第二 PMI, 使得所述基站能够接收到所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI。
具体的, 由于一个第一 PMI对应一个 Wl 7 使得所述基站可以根据所述 UE反馈的第一 PMI的数量为 M, 确定所述^的数量也为 M, 并釆用与所述 UE相同的方式从所述 N个第一子带中确定所述 M个第二子带, 第一个 对 应第一个第二子带, 第二个 ^ 对应第二个第二子带, 以此类推, 直到第 N 个第二子带对应 \ (!¾)。
其中, 本申请实施例中的预编码矩阵可以是经过行或者列置换之后的预 编码矩。
本发明实施例中,由于本申请技术方案是所述基站接收到所述 UE反馈的 所述 N个第一子带中的每一个第一子带对应的第二 PMI和 M个第二子带中的 每一个第二子带对应的第一 PMI, 且 N和 M均为不小于 2的整数, 使得所述 基站会接收到多个第一 PMI, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大的场景时, 可以通过多个第一预编码矩阵来覆盖整 个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预 编码矩阵能够提高波束量化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
本发明实施例中, 由于本申请技术方案是基于接收到的基站发送的参考 信号, 从码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵 指示 PMI发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一个第二子带反馈一个第一 PMI, 使得将多个第一 PMI反馈给所述基 站, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大 的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能够提高波束量 化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
另外, 由于 M个 W^o M个第二子带——对应, 使得每一个 W †应所述 系统传输带宽中的一部分, 且所述系统传输带宽中的每一个部分带宽均有与 之对应的 Wl 7 且 M为不小于 2的整数, 使得通过多个 W来覆盖整个系统传 输带宽的波束相位变化, 降低系统性能损失; 而且由于每一个^仅对应所述 系统传输带宽中的一部分, 进而使得波束向量的量化颗粒度精度得以提高。
实施例十七 基于与上述预编码矩阵指示的反馈方法相同的技术构思, 本发明实施例 提供了一种 UE, 如图 6所示, 所述 UE包括:
接收单元 601, 用于接收基站发送的参考信号;
矩阵选择单元 602, 用于接收接收单元 601发送的所述参考信号,基于所 述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带 选择一个预编码矩阵, 其中, 所述码本至少包含两个预编码矩阵, 且每个预 编码矩阵至少由第一预编码矩阵指示 PMI和第二 PMI表示, 其中, 所述 N个 第一子带中的每一个第一子带对应一个第二 PMI, M个第二子带中的每一个 第二子带对应一个第一 PMI,所述 M个第二子带是从所述 N个第一子带中确 定的,且所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数;
发送单元 603,用于在矩阵选择单元 602为每个第一子带选择一个预编码 矩阵之后, 将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每一 个第一子带对应的第二 PMI反馈至所述基站。
其中, 接收单元 601接收的所述参考信号例如是所述参考信号可以包括 CSI RS或者 DM RS或者 CRS等。
较佳的, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部分 子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第一 子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE可 以通过均勾等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带。
较佳的,所述 UE用于在矩阵选择单元 602从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵之前, 还需从所述 N个 第一子带中确定所述 M个第二子带, 其中, 所述 M个第二子带包含的所有的 第一子带为所述 N个第一子带, 且每一个第一子带仅能够被一个第二子带所 包含,其中, 由于所述 M个第二子带中的每一个第二子带对应一个第一 PMI, 使得包含有至少两个第一子带的第二子带中包含的所有第一子带均对应同一 个第一 PMI。
较佳的, 所述 UE在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE首先确定所述 M的值,再根据所述 M的值,从所述 N个第一子带中 确定所述 M个第二子带, 其中, 所述 UE在确定所述 M的值时, 可以根据所 述 UE配置方式、 所述 UE反馈方式、 所述预定义方式或所述基站配置方式来 确定, 以及所述 UE在确定出所述 M的值之后, 将所述 N个第一子带划分成 所述 M个第二子带, 且由于至少存在一个第二子带包含至少两个第一子带, 使得所述 M的值小于所述 N的值。
较佳的, 所述 UE在通过所述 UE反馈方式来确定所述 M的值时, 所述 UE还包括第一 M值确定单元 604,用于将预选择的 M的值上报给所述基站, 并接收所述基站反馈的所述 M的值,所述 M的值是所述基站基于所述预选择 的 M的值来确定的。
具体的, 第一 M值确定单元 604会选择一个所述预选择的 M的值, 然后 将所述预选择的 M的值上报给所述基站,所述基站接收到所述预选择的 M的 值之后, 根据所述预选择的 M的值, 确定所述 M的值, 所述基站将确定的所 述 M的值反馈给所述 UE, 进而接收到所述 M的值。
较佳的, 所述 UE在通过所述 UE配置方式来确定所述 M的值时, 所述 UE还包括第二 M值确定单元 605, 用于基于所述参考信号, 确定信道估计, 再根据所述信道估计及所述码本, 确定所述 M的值, 其中, 选择所述 M个第 二子带时的系统容量比选择 M-1个第二子带时的系统容量的容量增益大于门 限值。
具体的, 第二 M值确定单元 605, 具体用于根据所述信道估计和所述码 本, 确定所述 M的值时, 所述门限值根据实际情况来确定, 且所述 M的值不 大于所述码本中的预编码矩阵的数量, 例如, 所述预编码矩阵的数量为 5, 则 所述 M的值最大为 5, 最小为 2。
较佳的, 所述 UE在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE首先确定所述 M个第二子带中的每个第二子带包含的第一子带的个 数, 再根据每个第二子带包含的第一子带的个数, 从所述 N个第一子带中确 定所述 M个第二子带, 其中, 所述 UE在每个第二子带包含的第一子带的个 数时, 可以根据所述 UE配置方式、 所述 UE反馈方式、 所述预定义方式或所 述基站配置方式来确定,以及所述 UE在确定出每个第二子带包含的第一子带 的个数之后, 从所述 N个第一子带中确定所述 M个第二子带。
较佳的, 所述 UE还包括第一上报单元 606, 用于在矩阵选择单元 602基 于所述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一 子带选择一个预编码矩阵时, 将所述 M的值上报给所述基站。
较佳的, 所述 UE还包括第二上报单元 607, 用于在所述矩阵选择单元基 于所述参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一 子带选择一个预编码矩阵时, 将所述 M个第二子带中每个第二子带包含的第 一子带的个数上报给所述基站。
较佳的, 所述 M的值和 /或所 M个第二子带中的每个第二子带包含的第 一子带的个数是所述基站配置的。
较佳的, 所述 M的值和 /或所述 M个第二子带中的每个第二子带包含的 第一子带的个数是预定义的。
具体的, 在所述 M的值是以预定义方式来确定的, 在以所述预定义方式 来确定所述 M的值时, 所述 UE和所述基站可以预先设定同一值为所述 M的 值, 例如可以设定所述 M的值为 3、 4、 5等值; 所述 UE还可以根据所述系 统传输带宽, 来设定所述 M的值, 在所述系统传输带宽不大于 10MHz时, 所述 M的值例如为 2、 3、 4等值, 在所述系统传输带宽大于所述 10MHz时, 所述 M的值例如是 3、 4、 5等值。
进一步的, 在所述 M个第二子带中的每个第二子带包含的第一子带的个 数是根据所述预定义方式来确定时,所述 UE和所述基站均釆用预定义规则来 配置所述 M个第二子带中的每个第二子带包含的第一子带的个数, 所述预定 义规则例如可以是每个第二子带包含的第一子带的个数均相同, 或均不同, 或部分相同等。 较佳的,所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不 相同。
较佳的, 所述 M个第二子带中的每一个第二子带包含的第一子带是频率 连续或者频率不连续。
较佳的, 所述码本中的每个预编码矩阵可以表示为
w = \ w2
其中, Wi由所述第一 PMI表示, W2由所述第二 PMI表示。
较佳的, 由于所述 M的值是根据所述信道估计和所述码本来确定, 而当 不同的 UE所处环境不同, 对应的信道特征参数例如角度扩展、 频率相关性、 空间相关性不同, 和 /或, 所述码本不同时, 会使得不同的 UE对应的第二子 带的数量可以相同或不相同, 以及使得至少有两个 UE对应的 M的值可以是 相同或不相同的。
进一步的, 不同的 UE对应的系统传输带宽可以是相同或不同的, 而且可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带, 从而可以确定不同的 UE对应的 N的值是可以相同或不相同的, 且不同 的 UE对应的第二子带的数量可以相同或不同, 在两个 UE对应的 N值相同, 且 M值不同时,使得所述两个 UE对应的 M个第二子带中每个第二子带包含 第一子带的个数是不相同; 而在两个 UE对应的 N值相同, 且 M值相同时, 使得所述两个 UE对应的 M个第二子带中每个第二子带包含第一子带的个数 可以是相同的, 如此, 使得至少有两个 UE对应的 M个第二子带中每个第二 子带包含第一子带的个数是不相同或相同的。
本发明实施例中, 由于本申请技术方案是基于接收到的基站发送的参考 信号, 从码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵 指示 PMI发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一个第二子带反馈一个第一 PMI, 使得将多个第一 PMI反馈给所述基 站, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大 的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能够提高波束量 化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
实施例十八
基于与上述预编码矩阵指示的反馈方法相同的技术构思, 本发明实施例 提供了一种 UE, 如图 7所示, 所述 UE包括:
接收器 701, 用于接收基站发送的参考信号;
处理器 702, 用于基于所述参考信号, 从码本中为系统传输带宽中的 N 个第一子带中的每个第一子带选择一个预编码矩阵, 其中, 所述码本至少包 含两个预编码矩阵, 且每个预编码矩阵至少由第一预编码矩阵指示 PMI和第 二 PMI表示,其中,所述 N个第一子带中的每一个第一子带对应一个第二 PMI, M个第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二子带是 从所述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个第二子 带包含至少二个第一子带, N和 M均为不小于 2的正整数;
发送器 703, 用于将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每一个第一子带对应的第二 PMI反馈至所述基站。
其中, 接收器 701例如是天线等电子设备, 进一步的, 处理器 702例如 是单独的处理芯片, 还可以是所述 UE的处理器, 进一步的, 发送器 703例如 是天线等电子设备。
其中,接收器 701接收的所述参考信号例如是所述参考信号可以包括 CSI RS或者 DM RS或者 CRS等。
较佳的, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部分 子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第一 子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带。
较佳的, 处理器 702在从码本中为系统传输带宽中的 N个第一子带中的 每个第一子带选择一个预编码矩阵之前, 还需从所述 N个第一子带中确定所 述 M个第二子带, 其中, 所述 M个第二子带包含的所有的第一子带为所述 N 个第一子带, 且每一个第一子带仅能够被一个第二子带所包含, 其中, 由于 所述 M个第二子带中的每一个第二子带对应一个第一 PMI, 使得包含有至少 两个第一子带的第二子带中包含的所有第一子带均对应同一个第一 PMI。
较佳的, 所述 UE在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE首先确定所述 M的值,再根据所述 M的值,从所述 N个第一子带中 确定所述 M个第二子带, 其中, 所述 UE在确定所述 M的值时, 可以根据所 述 UE配置方式、 所述 UE反馈方式、 所述预定义方式或所述基站配置方式来 确定, 以及所述 UE在确定出所述 M的值之后, 将所述 N个第一子带划分成 所述 M个第二子带, 且由于至少存在一个第二子带包含至少两个第一子带, 使得所述 M的值小于所述 N的值。
较佳的, 所述 UE在通过所述 UE反馈方式来确定所述 M的值时, 发送 器 703, 还用于将预选择的 M的值上报给所述基站; 接收器 701, 还用于接收 所述基站反馈的所述 M的值, 所述 M的值是所述基站基于所述预选择的 M 的值来确定的。
具体的, 处理器 702会选择一个所述预选择的 M的值, 然后通过发送器 703将所述预选择的 M的值上报给所述基站, 所述基站接收到所述预选择的 M的值之后, 根据所述预选择的 M的值, 确定所述 M的值, 所述基站将确 定的所述 M的值反馈给所述 UE, 进而使得接收器 701接收到所述基站反馈 的所述 M的值。
较佳的, 所述 UE在通过所述 UE配置方式来确定所述 M的值时, 处理 器 702, 具体用于基于所述参考信号, 确定信道估计, 并根据所述信道估计及 所述码本, 确定所述 M的值, 其中, 选择所述 M个第二子带时的系统容量比 选择 M-1个第二子带时的系统容量的容量增益大于门限值。
具体的, 处理器 702, 具体用于根据所述信道估计和所述码本, 确定所述 M的值时, 所述门限值才艮据实际情况来确定, 且所述 M的值不大于所述码本 中的预编码矩阵的数量, 例如, 所述预编码矩阵的数量为 5, 则所述 M的值 最大为 5, 最小为 2。
较佳的, 所述 UE在从所述 N个第一子带中确定所述 M个第二子带时, 所述 UE首先确定所述 M个第二子带中的每个第二子带包含的第一子带的个 数, 再根据每个第二子带包含的第一子带的个数, 从所述 N个第一子带中确 定所述 M个第二子带, 其中, 所述 UE在每个第二子带包含的第一子带的个 数时, 可以根据所述 UE配置方式、 所述 UE反馈方式、 所述预定义方式或所 述基站配置方式来确定,以及所述 UE在确定出每个第二子带包含的第一子带 的个数之后, 从所述 N个第一子带中确定所述 M个第二子带。
较佳的, 发送器 703, 用于在处理器 702基于所述参考信号, 从码本中为 系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵时, 将所述 M的值上报给所述基站。
较佳的, 发送器 703, 用于在处理器 702基于所述参考信号, 从码本中为 系统传输带宽中的 N个第一子带中的每个第一子带选择一个预编码矩阵时, 将所述 M个第二子带中每个第二子带包含的第一子带的个数上报给所述基 站。
较佳的, 所述 M的值和 /或所 M个第二子带中的每个第二子带包含的第 一子带的个数是所述基站配置的。
较佳的, 所述 M的值和 /或所述 M个第二子带中的每个第二子带包含的 第一子带的个数是预定义的。
具体的, 在所述 M的值是以预定义方式来确定的, 在以所述预定义方式 来确定所述 M的值时, 所述 UE和所述基站可以预先设定同一值为所述 M的 值, 例如可以设定所述 M的值为 3、 4、 5等值; 所述 UE还可以根据所述系 统传输带宽, 来设定所述 M的值, 在所述系统传输带宽不大于 10MHz时, 所述 M的值例如为 2、 3、 4等值, 在所述系统传输带宽大于所述 10MHz时, 所述 M的值例如是 3、 4、 5等值。
进一步的, 在所述 M个第二子带中的每个第二子带包含的第一子带的个 数是根据所述预定义方式来确定时,所述 UE和所述基站均釆用预定义规则来 配置所述 M个第二子带中的每个第二子带包含的第一子带的个数, 所述预定 义规则例如可以是每个第二子带包含的第一子带的个数均相同, 或均不同, 或部分相同等。
较佳的,所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不 相同。
较佳的, 所述 M个第二子带中的每一个第二子带包含的第一子带是频率 连续或者频率不连续。
较佳的, 所述码本中的每个预编码矩阵可以表示为
w = \ w2
其中, Wi由所述第一 PMI表示, W2由所述第二 PMI表示。
较佳的, 由于所述 M的值是根据所述信道估计和所述码本来确定, 而当 不同的 UE所处环境不同, 对应的信道特征参数例如角度扩展、 频率相关性、 空间相关性不同, 和 /或, 所述码本不同时, 会使得不同的 UE对应的第二子 带的数量可以相同或不相同, 以及使得至少有两个 UE对应的 M的值可以是 相同或不相同的。
进一步的, 不同的 UE对应的系统传输带宽可以是相同或不同的, 而且可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带, 从而可以确定不同的 UE对应的 N的值是可以相同或不相同的, 且不同 的 UE对应的第二子带的数量可以相同或不同, 在两个 UE对应的 N值相同, 且 M值不同时,使得所述两个 UE对应的 M个第二子带中每个第二子带包含 第一子带的个数是不相同; 而在两个 UE对应的 N值相同, 且 M值相同时, 使得所述两个 UE对应的 M个第二子带中每个第二子带包含第一子带的个数 可以是相同的, 如此, 使得至少有两个 UE对应的 M个第二子带中每个第二 子带包含第一子带的个数是不相同或相同的。
本发明实施例中, 由于本申请技术方案是基于接收到的基站发送的参考 信号, 从码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵 指示 PMI发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一个第二子带反馈一个第一 PMI, 使得将多个第一 PMI反馈给所述基 站, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大 的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能够提高波束量 化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
实施例十九
基于与上述预编码矩阵指示的接收方法相同的技术构思, 本发明实施例 提供了一种基站, 如图 8所示, 所述基站包括:
发送单元 801, 用于向 UE发送参考信号;
接收单元 802,用于接收所述 UE反馈的系统传输带宽中的 N个第一子带 中的每一个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带对 应的第一 PMI, 其中, 所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数, 所述基站具有一码本, 所述码至少包含两个预编 码矩阵, 根据所述每一个第二子带对应的第一 PMI和所述每一个第一子带对 应的第二 PMI, 从所述码本中选择对应的预编码矩阵。
其中, 发送单元 801可以通过物理下行控制信道发送下行控制信息给所 述 UE,使得所述 UE能够接收到所述下行控制信息,根据所述下行控制信息, 获取所述参考信号, 当然, 所述基站还可以向所述 UE发送 RRC信令, 所述 RRC信令中包含有所述参考信号, 使得所述 UE能够基于接收到的所述 RRC 信令, 获取所述参考信号。
具体的,发送单元 801发送所述参考信号之后, 所述 UE能够接收到所述 参考信号, 再基于所述参考信号, 从所述码本中为所述 N个第一子带中的每 个第一子带选择一个预编码矩阵, 所述码本中的每一个预编码矩阵至少由第 一 PMI和第二 PMI表示,然后将每一个第二子带对应的第一 PMI和每一个第 一子带对应的第二 PMI反馈给发送单元 802, 使得发送单元 802能够接收所 述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI, 进而使得所述基站根据所述每一个第二子带对应的第一 PMI和所述每一个第 一子带对应的第二 PMI, 从所述码本中查找对应的预编码矩阵。
较佳的, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部分 子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第一 子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带。
较佳的, 接收单元 802, 还用于接收所述 UE上报的预选择的 M的值; 所述基站还包括 M值确定单元 803, 用于接收接收单元 802发送的所述预选 择的 M的值, 根据所述预选择的 M的值, 确定所述 M的值。
较佳的, 所述 M的值和 /或所 M个第二子带中的每个第二子带包含的第 一子带的个数是所述基站配置的。
较佳的, 接收单元 802, 还用于在所述基站向 UE发送参考信号之后, 接 收所述 UE上报的所述 M个第二子带中每个第二子带包含的第一子带的个数。
较佳的, 接收单元 802, 还用于在所述基站向 UE发送参考信号之后, 接 收所述 UE上报的所述 M的值。
较佳的, 所述 M的值和 /或所述 M个第二子带中的每个第二子带包含的 第一子带的个数是预定义的。
具体的, 在所述 M的值是以预定义方式来确定的, 在以所述预定义方式 来确定所述 M的值时, 所述 UE和所述基站可以预先设定同一值为所述 M的 值, 例如可以设定所述 M的值为 3、 4、 5等值; 所述 UE还可以根据所述系 统传输带宽, 来设定所述 M的值, 在所述系统传输带宽不大于 10MHz时, 所述 M的值例如为 2、 3、 4等值, 在所述系统传输带宽大于所述 10MHz时, 所述 M的值例如是 3、 4、 5等值。
进一步的, 在所述 M个第二子带中的每个第二子带包含的第一子带的个 数是根据所述预定义方式来确定时,所述 UE和所述基站均釆用预定义规则来 配置所述 M个第二子带中的每个第二子带包含的第一子带的个数, 所述预定 义规则例如可以是每个第二子带包含的第一子带的个数均相同, 或均不同, 或部分相同等。
较佳的,所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不 相同。
较佳的, 所述 M个第二子带中的每一个第二子带包含的第一子带是频率 连续或者频率不连续。
较佳的, 所述码本中的每个预编码矩阵可以表示为
w = \ w2
其中, Wi由所述第一 PMI表示, W2由所述第二 PMI表示。
较佳的, 由于所述 M的值是根据所述信道估计和所述码本来确定, 而当 不同的 UE所处环境不同, 对应的信道特征参数例如角度扩展、 频率相关性、 空间相关性不同, 和 /或, 所述码本不同时, 会使得不同的 UE对应的第二子 带的数量可以相同或不相同, 以及使得至少有两个 UE对应的 M的值可以是 相同或不相同的。
进一步的, 不同的 UE对应的系统传输带宽可以是相同或不同的, 而且可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带, 从而可以确定不同的 UE对应的 N的值是可以相同或不相同的, 且不同 的 UE对应的第二子带的数量可以相同或不同, 在两个 UE对应的 N值相同, 且 M值不同时,使得所述两个 UE对应的 M个第二子带中每个第二子带包含 第一子带的个数是不相同; 而在两个 UE对应的 N值相同, 且 M值相同时, 使得所述两个 UE对应的 M个第二子带中每个第二子带包含第一子带的个数 可以是相同的, 如此, 使得至少有两个 UE对应的 M个第二子带中每个第二 子带包含第一子带的个数是不相同或相同的。
本发明实施例中, 由于本申请技术方案是基于接收到的基站发送的参考 信号, 从码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵 指示 PMI发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一个第二子带反馈一个第一 PMI, 使得将多个第一 PMI反馈给所述基 站, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大 的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能够提高波束量 化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
实施例二十
基于与上述预编码矩阵指示的接收方法相同的技术构思, 本发明实施例 提供了一种基站, 如图 9所示, 所述基站包括:
发送器 901, 用于向 UE发送参考信号;
接收器 902,用于接收所述 UE反馈的系统传输带宽中的 N个第一子带中 的每一个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带对应 的第一 PMI, 其中, 所述 M个第二子带是从所述 N个第一子带中确定的, 且 所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M 均为不小于 2的正整数;
存储器 903, 用于存储码本, 所述码本至少包含两个预编码矩阵; 处理器 904, 用于根据所述每一个第二子带对应的第一 PMI和所述每一 个第一子带对应的第二 PMI, 从所述码本中选择对应的预编码矩阵。
其中, 发送器 901例如是天线等电子设备, 进一步的, 接收器 902例如 是天线等电子设备。
进一步的, 存储器 903例如是内存、 硬盘等电子设备, 进一步的, 处理 器 904例如是单独的处理芯片, 还可以是所述 UE的处理器。
较佳的, 发送器 901可以通过物理下行控制信道发送下行控制信息给所 述 UE,使得所述 UE能够接收到所述下行控制信息,根据所述下行控制信息, 获取所述参考信号, 当然, 所述基站还可以向所述 UE发送 RRC信令, 所述 RRC信令中包含有所述参考信号, 使得所述 UE能够基于接收到的所述 RRC 信令, 获取所述参考信号。
具体的,发送器 901发送所述参考信号之后, 所述 UE能够接收到所述参 考信号, 再基于所述参考信号, 从所述码本中为所述 N个第一子带中的每个 第一子带选择一个预编码矩阵, 所述码本中的每一个预编码矩阵至少由第一
PMI和第二 PMI表示, 然后将每一个第二子带对应的第一 PMI和每一个第一 子带对应的第二 PMI反馈给发送单元 802, 使得发送单元 802能够接收所述 每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI, 进 而使得所述基站根据所述每一个第二子带对应的第一 PMI和所述每一个第一 子带对应的第二 PMI, 从所述码本中查找对应的预编码矩阵。
较佳的, 所述 N个第一子带为所述系统传输带宽中的所有子带或者部分 子带, 且所述 UE和所述基站基于相同的方式确定得到相同的所述 N个第一 子带, 其中, 每一个第一子带对应的带宽可以相同或不同, 例如 所述 UE可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带。
较佳的, 接收器 902, 还用于接收所述 UE上报的预选择的 M的值; 处 理器 904, 还用于根据所述预选择的 M的值, 确定所述 M的值。
较佳的, 所述 M的值和 /或所 M个第二子带中的每个第二子带包含的第 一子带的个数是所述基站配置的。
较佳的, 接收器 902, 还用于在发送器 901向 UE发送参考信号之后, 接 收所述 UE上报的所述 M的值。
较佳的, 接收器 902, 还用于在发送器 901向 UE发送参考信号之后, 接 收所述 UE上报的所述 M个第二子带中每个第二子带包含的第一子带的个数。
较佳的, 所述 M的值和 /或所述 M个第二子带中的每个第二子带包含的 第一子带的个数是预定义的。
具体的, 在所述 M的值是以预定义方式来确定的, 在以所述预定义方式 来确定所述 M的值时, 所述 UE和所述基站可以预先设定同一值为所述 M的 值, 例如可以设定所述 M的值为 3、 4、 5等值; 所述 UE还可以根据所述系 统传输带宽, 来设定所述 M的值, 在所述系统传输带宽不大于 10MHz时, 所述 M的值例如为 2、 3、 4等值, 在所述系统传输带宽大于所述 10MHz时, 所述 M的值例如是 3、 4、 5等值。 进一步的, 在所述 M个第二子带中的每个第二子带包含的第一子带的个 数是根据所述预定义方式来确定时,所述 UE和所述基站均釆用预定义规则来 配置所述 M个第二子带中的每个第二子带包含的第一子带的个数, 所述预定 义规则例如可以是每个第二子带包含的第一子带的个数均相同, 或均不同, 或部分相同等。
较佳的,所述 M个第二子带中至少有二个第二子带所对应的第一 PMI不 相同。
较佳的, 所述 M个第二子带中的每一个第二子带包含的第一子带是频率 连续或者频率不连续的。
较佳的, 所述码本中的每个预编码矩阵可以表示为
w = \ w2
其中, Wi由所述第一 PMI表示, W2由所述第二 PMI表示。
较佳的, 由于所述 M的值是根据所述信道估计和所述码本来确定, 而当 不同的 UE所处环境不同, 对应的信道特征参数例如角度扩展、 频率相关性、 空间相关性不同, 和 /或, 所述码本不同时, 会使得不同的 UE对应的第二子 带的数量可以相同或不相同, 以及使得至少有两个 UE对应的 M的值可以是 相同或不相同的。
进一步的, 不同的 UE对应的系统传输带宽可以是相同或不同的, 而且可 以通过均匀等分方式或者非等分方式来将所述系统传输带宽分成 N个第一子 带, 从而可以确定不同的 UE对应的 N的值是可以相同或不相同的, 且不同 的 UE对应的第二子带的数量可以相同或不同, 在两个 UE对应的 N值相同, 且 M值不同时,使得所述两个 UE对应的 M个第二子带中每个第二子带包含 第一子带的个数是不相同; 而在两个 UE对应的 N值相同, 且 M值相同时, 使得所述两个 UE对应的 M个第二子带中每个第二子带包含第一子带的个数 可以是相同的, 如此, 使得至少有两个 UE对应的 M个第二子带中每个第二 子带包含第一子带的个数是不相同或相同的。
本发明实施例中, 由于本申请技术方案是基于接收到的基站发送的参考 信号, 从码本中选择预编码矩阵, 并将与所述预编码矩阵对应的预编码矩阵 指示 PMI发送给所述基站, 由于 M个第二子带是从 N个第一子带中确定的, 且为每一个第二子带反馈一个第一 PMI, 使得将多个第一 PMI反馈给所述基 站, 而一个第一 PMI对应一个波束相位变化范围, 使得在波束相位变化较大 的场景时, 可以通过多个第一预编码矩阵来覆盖整个带宽的波束相位变化, 而在波束相位变化较小的场景时, 通过多个第一预编码矩阵能够提高波束量 化颗粒度, 进而使得码本与波束相位的场景相匹配, 使得系统性能得以提高。
本领域的技术人员应明白,本发明的实施例可提供为方法、装置(设备)、 或计算机程序产品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实施例的形式。 而且, 本发明可釆用在一个或多个 其中包含有计算机可用程序代码的计算机可用存储介质 (包括但不限于磁盘 存储器、 CD-ROM、 光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、 装置 (设备)和计算机程序产 品的流程图和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 / 或方框图中的每一流程和 /或方框、以及流程图和 /或方框图中的流程和 /或方框 的结合。 可提供这些计算机程序指令到通用计算机、 专用计算机、 嵌入式处 理机或其他可编程数据处理设备的处理器以产生一个机器, 使得通过计算机 或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个 流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设 备以特定方式工作的计算机可读存储器中, 使得存储在该计算机可读存储器 中的指令产生包括指令装置的制造品, 该指令装置实现在流程图一个流程或 多个流程和 /或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的 处理, 从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图 一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的步骤。 尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了 基本创造性概念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权 利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。 发明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种用户设备 UE, 其特征在于, 所述 UE包括:
接收单元, 用于接收基站发送的参考信号;
矩阵选择单元, 用于接收所述接收单元发送的所述参考信号, 基于所述 参考信号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选 择一个预编码矩阵, 其中, 所述码本至少包含两个预编码矩阵, 且每个预编 码矩阵至少由第一预编码矩阵指示 PMI和第二 PMI表示, 其中, 所述 N个第 一子带中的每一个第一子带对应一个第二 PMI, M个第二子带中的每一个第 二子带对应一个第一 PMI,所述 M个第二子带是从所述 N个第一子带中确定 的, 且所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不小于 2的正整数;
发送单元, 用于在所述矩阵选择单元为每个第一子带选择一个预编码矩 阵之后, 将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每一个 第一子带对应的第二 PMI反馈至所述基站。
2、 如权利要求 1所述的 UE, 其特征在于, 所述 N个第一子带为所述系 统传输带宽中的一个载波上的所有子带或者部分子带。
3、 如权利要求 1所述的 UE, 其特征在于, 所述 UE还包括第一上报单 元, 用于在所述矩阵选择单元基于所述参考信号, 从码本中为系统传输带宽 中的 N个第一子带中的每个第一子带选择一个预编码矩阵时, 将所述 M的值 上报给所述基站。
4、 如权利要求 1所述的 UE, 其特征在于, 所述 UE还包括第一 M值确 定单元, 用于将预选择的 M的值上报给所述基站, 并接收所述基站反馈的所 述 M的值, 所述 M的值是所述基站基于所述预选择的 M的值来确定的。
5、 如权利要求 1所述的 UE, 其特征在于, 所述 M的值和 /或所 M个第 二子带中的每个第二子带包含的第一子带的个数是所述基站配置的。
6、 如权利要求 1所述的 UE, 其特征在于, 所述 UE还包括第二上报单 元, 用于在所述矩阵选择单元基于所述参考信号, 从码本中为系统传输带宽 中的 N个第一子带中的每个第一子带选择一个预编码矩阵时, 将所述 M个第 二子带中每个第二子带包含的第一子带的个数上报给所述基站。
7、 如权利要求 1所述的 UE, 其特征在于, 所述 M的值和 /或所述 M个 第二子带中的每个第二子带包含的第一子带的个数是预定义的。
8、 如权利要求 1所述的 UE, 其特征在于, 所述 UE还包括第二 M值确 定单元, 用于基于所述参考信号, 确定信道估计, 再根据所述信道估计及所 述码本, 确定所述 M的值, 其中, 选择所述 M个第二子带时的系统容量比选 择 M-1个第二子带时的系统容量的容量增益大于门限值。
9、 如权利要求 1-8任一项所述的 UE, 其特征在于, 所述 M个第二子带 中至少有二个第二子带所对应的第一 PMI不相同。
10、 如权利要求 1-9任一项所述的 UE, 其特征在于, 所述 M个第二子带 中的每一个第二子带包含的第一子带是频率连续或者频率不连续。
11、如权利要求 1-10任一项所述的 UE, 其特征在于, 所述码本中的每个 预编码矩阵可以表示为
w = \ w2
其中, Wi由所述第一 PMI表示, W2由所述第二 PMI表示。
12、 如权利要求 1-11任一项所述的 UE, 其特征在于, 至少有两个 UE对 应的 M的值不相同。
13、 如权利要求 1-12任一项所述的 UE, 其特征在于, 至少有两个 UE对 应的 M个第二子带中每个第二子带包含第一子带的个数不相同。
14、 一种基站, 其特征在于, 所述基站包括:
发送单元, 用于向 UE发送参考信号;
接收单元, 用于接收所述 UE反馈的系统传输带宽中的 N个第一子带中 的每一个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带对应 的第一 PMI, 其中, 所述 M个第二子带是从所述 N个第一子带中确定的, 且 所述 M个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M 均为不小于 2的正整数, 所述基站具有一码本, 所述码至少包含两个预编码 矩阵, 根据所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应 的第二 PMI, 从所述码本中选择对应的预编码矩阵。
15、 如权利要求 14所述的基站, 其特征在于, 所述 N个第一子带为所述 系统传输带宽中的一个载波上的所有子带或者部分子带。
16、 如权利要求 14所述的基站, 其特征在于, 所述接收单元, 还用于在 所述基站向 UE发送参考信号之后, 接收所述 UE上报的所述 M的值。
17、 如权利要求 14所述的基站, 其特征在于, 所述接收单元, 还用于接 收所述 UE上报的预选择的 M的值; 所述基站还包括 M值确定单元, 用于接 收所述接收单元发送的所述预选择的 M的值,根据所述预选择的 M的值,确 定所述 M的值。
18、 如权利要求 14所述的基站, 其特征在于, 所述 M的值和 /或所 M个 第二子带中的每个第二子带包含的第一子带的个数是所述基站配置的。
19、 如权利要求 14所述的基站, 其特征在于, 所述接收单元, 还用于在 所述基站向 UE发送参考信号之后, 接收所述 UE上报的所述 M个第二子带 中每个第二子带包含的第一子带的个数。
20、 如权利要求 14所述的基站, 其特征在于, 所述 M的值和 /或所述 M 个第二子带中的每个第二子带包含的第一子带的个数是预定义的。
21、 如权利要求 14-20任一项所述的基站, 其特征在于, 所述 M个第二 子带中至少有二个第二子带所对应的第一 PMI不相同。
22、 如权利要求 14-21任一项所述的基站, 其特征在于, 所述 M个第二 子带中的每一个第二子带包含的第一子带是频率连续或者频率不连续。
23、 如权利要求 14-22任一项所述的基站, 其特征在于, 所述码本中的每 个预编码矩阵可以表示为
w = \ w2
其中, Wi由所述第一 PMI表示, W2由所述第二 PMI表示。
24、 如权利要求 14-23任一项所述的基站, 其特征在于, 至少有两个 UE 对应的 M的值不相同。
25、 如权利要求 14-24任一项所述的基站, 其特征在于, 至少有两个 UE 对应的 M个第二子带中每个第二子带包含第一子带的个数不相同。
26、 一种预编码矩阵指示的反馈方法, 其特征在于, 所述方法包括: 用户设备 UE接收基站发送的参考信号;
所述 UE基于所述参考信号, 从码本中为系统传输带宽中的 N个第一子 带中的每个第一子带选择一个预编码矩阵, 其中, 所述码本至少包含两个预 编码矩阵, 且每个预编码矩阵至少由第一预编码矩阵指示 PMI和第二 PMI表 示, 其中, 所述 N个第一子带中的每一个第一子带对应一个第二 PMI, M个 第二子带中的每一个第二子带对应一个第一 PMI, 所述 M个第二子带是从所 述 N个第一子带中确定的,且所述 M个第二子带中至少存在一个第二子带包 含至少二个第一子带, N和 M均为不小于 2的正整数;
所述 UE将每一个第二子带对应的第一 PMI反馈至所述基站, 以及将每 一个第一子带对应的第二 PMI反馈至所述基站。
27、 如权利要求 26所述的方法, 其特征在于, 所述 N个第一子带为所述 系统传输带宽中的一个载波上的所有子带或者部分子带。
28、 如权利要求 26所述的方法, 其特征在于, 所述 UE基于所述参考信 号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个 预编码矩阵时, 所述方法还包括:
所述 UE将所述 M的值上报给所述基站。
29、 如权利要求 26所述的方法, 其特征在于, 所述 M的值的确定步骤, 具体包括:
所述 UE将预选择的 M的值上报给所述基站;
所述 UE接收所述基站反馈的所述 M的值, 所述 M的值是所述基站基于 所述预选择的 M的值来确定的。
30、 如权利要求 26所述的方法, 其特征在于, 所述 M的值和 /或所 M个 第二子带中的每个第二子带包含的第一子带的个数是所述基站配置的。
31、 如权利要求 26所述的方法, 其特征在于, 所述 UE基于所述参考信 号, 从码本中为系统传输带宽中的 N个第一子带中的每个第一子带选择一个 预编码矩阵时, 所述方法还包括:
所述 UE将所述 M个第二子带中每个第二子带包含的第一子带的个数上 报给所述基站。
32、 如权利要求 26所述的方法, 其特征在于, 所述 M的值和 /或所述 M 个第二子带中的每个第二子带包含的第一子带的个数是预定义的。
33、 如权利要求 26所述的方法, 其特征在于, 所述 M的值的确定步骤, 具体包括:
所述 UE基于所述参考信号, 确定信道估计;
所述 UE根据所述信道估计及所述码本, 确定所述 M的值, 其中, 选择 所述 M个第二子带时的系统容量比选择 M-1个第二子带时的系统容量的容量 增益大于门限值。
34、 如权利要求 26-33任一项所述的方法, 其特征在于, 所述 M个第二 子带中至少有二个第二子带所对应的第一 PMI不相同。
35、 如权利要求 26-34任一项所述的方法, 其特征在于, 所述 M个第二 子带中的每一个第二子带包含的第一子带是频率连续或者频率不连续。
36、 如权利要求 26-35任一项所述的方法, 其特征在于, 所述码本中的每 个预编码矩阵可以表示为
w = \ w2
其中, Wi由所述第一 PMI表示, W2由所述第二 PMI表示。
37、 如权利要求 26-36任一项所述的方法, 其特征在于, 至少有两个 UE 对应的 M的值不相同。
38、 如权利要求 26-37任一项所述的方法, 其特征在于, 至少有两个 UE 对应的 M个第二子带中每个第二子带包含第一子带的个数不相同。
39、 一种预编码矩阵指示的接收方法, 其特征在于, 所述方法包括: 基站向 UE发送参考信号; 所述基站接收所述 UE反馈的系统传输带宽中的 N个第一子带中的每一 个第一子带对应的第二 PMI和 M个第二子带中的每一个第二子带对应的第一 PMI, 其中, 所述 M个第二子带是从所述 N个第一子带中确定的, 且所述 M 个第二子带中至少存在一个第二子带包含至少二个第一子带, N和 M均为不 小于 2的正整数, 所述基站具有一码本, 所述码至少包含两个预编码矩阵, 根据所述每一个第二子带对应的第一 PMI和所述每一个第一子带对应的第二 PMI, 从所述码本中选择对应的预编码矩阵。
40、 如权利要求 39所述的方法, 其特征在于, 所述 N个第一子带为所述 系统传输带宽中的一个载波上的所有子带或者部分子带。
41、 如权利要求 39所述的方法, 其特征在于, 在所述基站向 UE发送参 考信号之后, 所述方法还包括:
所述基站接收所述 UE上报的所述 M的值。
42、 如权利要求 39所述的方法, 其特征在于, 所述 M的值的确定步骤, 具体包括:
所述基站接收所述 UE上报的预选择的 M的值;
所述基站根据所述预选择的 M的值, 确定所述 M的值。
43、 如权利要求 39所述的方法, 其特征在于, 所述 M的值和 /或所 M个 第二子带中的每个第二子带包含的第一子带的个数是所述基站配置的。
44、 如权利要求 39所述的方法, 其特征在于, 在所述基站向 UE发送参 考信号之后, 所述方法还包括:
所述基站接收所述 UE上报的所述 M个第二子带中每个第二子带包含的 第一子带的个数。
45、 如权利要求 39所述的方法, 其特征在于, 所述 M的值和 /或所述 M 个第二子带中的每个第二子带包含的第一子带的个数是预定义的。
46、 如权利要求 39-45任一项所述的方法, 其特征在于, 所述 M个第二 子带中至少有二个第二子带所对应的第一 PMI不相同。
47、 如权利要求 39-46任一项所述的方法, 其特征在于, 所述 M个第二 子带中的每一个第二子带包含的第一子带是频率连续或者频率不连续。
48、 如权利要求 39-47任一项所述的方法, 其特征在于, 所述码本中的每 个预编码矩阵可以表示为
w = wt w2
其中, 由所述第一 PMI表示, W2由所述第二 PMI表示。
49、 如权利要求 39-48任一项所述的方法, 其特征在于, 至少有两个 UE 对应的 M的值不相同。
50、 如权利要求 39-49任一项所述的方法, 其特征在于, 至少有两个 UE 对应的 M个第二子带中每个第二子带包含第一子带的个数不相同。
PCT/CN2014/073958 2014-03-24 2014-03-24 预编码矩阵指示的反馈方法、接收方法及装置 WO2015143605A1 (zh)

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CN201811537593.XA CN109861730A (zh) 2014-03-24 2014-03-24 预编码矩阵指示的反馈方法、接收方法及装置
CN201480001645.5A CN105379139B (zh) 2014-03-24 2014-03-24 预编码矩阵指示的反馈方法、接收方法及装置
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