WO2014005257A1 - 确定预编码矩阵指示的方法、用户设备和基站 - Google Patents

确定预编码矩阵指示的方法、用户设备和基站 Download PDF

Info

Publication number
WO2014005257A1
WO2014005257A1 PCT/CN2012/078020 CN2012078020W WO2014005257A1 WO 2014005257 A1 WO2014005257 A1 WO 2014005257A1 CN 2012078020 W CN2012078020 W CN 2012078020W WO 2014005257 A1 WO2014005257 A1 WO 2014005257A1
Authority
WO
WIPO (PCT)
Prior art keywords
precoding matrix
sequence
constant
constant modulus
column vector
Prior art date
Application number
PCT/CN2012/078020
Other languages
English (en)
French (fr)
Inventor
王建国
周永行
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.)
Filing date
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 CN201280020698.2A priority Critical patent/CN103782533B/zh
Priority to PCT/CN2012/078020 priority patent/WO2014005257A1/zh
Priority to EP12880517.3A priority patent/EP2860897B1/en
Priority to EP17189750.7A priority patent/EP3334077B1/en
Publication of WO2014005257A1 publication Critical patent/WO2014005257A1/zh
Priority to US14/588,755 priority patent/US9209877B2/en
Priority to US14/931,284 priority patent/US9847817B2/en
Priority to US15/823,046 priority patent/US10326506B2/en

Links

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
    • H04B7/046Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account
    • H04B7/0465Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account taking power constraints at power amplifier or emission constraints, e.g. constant modulus, into account
    • 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
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/02Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/046Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to the field of communications, and more particularly to a method for determining a precoding matrix indication, a user equipment, and a base station in the field of communications. Background technique
  • multiple input multiple output (MIMO) wireless systems can achieve diversity and array gain.
  • Optimal precoding usually requires the transmitter to fully know the channel state information (Channel State Information, called "CSI”).
  • CSI Channel State Information
  • UE User Equipment
  • eNB evolved Node B
  • the existing CSI information of the long-term evolution (Long Term Evolution, called “LTE”) eighth version (Release 8, the tube is called “R8") system feedback includes: Rank Indicator (Rank Indicator, the tube is called “RI”)
  • the precoding matrix indicator (referred to as " ⁇ ”) and the channel quality information (“CQI”) information, etc., where RI and PMI indicate the number of layers used and the precoding matrix, respectively.
  • a set of precoding matrices that are typically used is referred to as a codebook or precoding codebook, and each precoding matrix in the codebook is referred to as a codeword.
  • AAS Active Antenna System
  • R12 the tube called "R12”
  • AAS active antenna system
  • the transceiver is directly connected to the antenna elements, and the amplitude and phase of each element can be directly adjusted, thereby not only adjusting the direction of the beam, but also adjusting the shape of the beam.
  • LTE R8 uses a single codebook, wherein the 4-antenna codebook is based on the Householder transform design, and each element of the precoding matrix of the codebook has the same amplitude, that is, the constant model is satisfied, thereby making the precoding matrix Only the direction of the beam can be adjusted, and the shape of the beam cannot be adjusted.
  • the tenth version of LTE (Release 10, called "R10") system further introduces a dual codebook design for 8 antennas, but the precoding matrix included in the dual codebook can only adjust the direction of the beam, and cannot adjust the beam. shape.
  • the embodiments of the present invention provide a method for determining a precoding matrix indication, a user equipment, and a base station.
  • the non-constant precoding matrix included in the codebook can adjust the shape of the beam, so that the communication system can effectively implement load balancing.
  • an embodiment of the present invention provides a method for determining a precoding matrix indication, where the method includes: receiving a reference signal set sent by a base station; and selecting, according to the reference signal set, a precoding matrix from the codebook, where the codebook is at least A non-constant modulus precoding matrix is included, the non-constant modulus precoding matrix includes at least one non-constant mode column vector, and the element amplitude values of the non-constant mode column vector form a symmetry number ⁇ ij , and the length of the sequence is not less than 2 and not larger than the dimension of the non-constant mode column vector; transmitting a precoding matrix indication to the base station, the precoding matrix indicating corresponding to the selected precoding matrix.
  • an embodiment of the present invention provides a method for determining a precoding matrix indication, where the method includes: sending a reference signal set to a user equipment; receiving a precoding matrix indication sent by the user equipment, where the precoding matrix indicates The user equipment corresponds to the precoding matrix selected from the codebook based on the reference signal set, where the codebook includes at least one non-constant modulus precoding matrix, and the non-constant modulus precoding matrix includes at least one non-constant mode column vector,
  • the element amplitude values of the non-constant mode column vectors constitute a series of symmetry, the length of the series being no less than 2 and not larger than the dimension of the non-constant mode column vector.
  • the embodiment of the present invention provides a user equipment, where the user equipment includes: a receiving module, configured to receive a reference signal set sent by the base station; and a selecting module, configured to receive, according to the reference signal set received by the receiving module, Selecting a precoding matrix in the codebook, the codebook includes at least one non-constant modulus precoding matrix, the non-constant modulus precoding matrix includes at least one non-constant mode column vector, and the element amplitude value of the non-constant mode column vector is symmetric a sequence of a number that is not less than 2 and not larger than a dimension of the non-constant mode column vector; a sending module, configured to send a precoding matrix indication to the base station, where the precoding matrix indication corresponds to the selection by the selection module Precoding matrix.
  • the embodiment of the present invention provides a base station, where the base station includes: a sending module, configured to send a reference signal set to the user equipment; and a receiving module, configured to receive a precoding matrix indication sent by the user equipment, the precoding
  • the matrix indication corresponds to the precoding matrix selected by the user equipment from the codebook based on the reference signal set, wherein the codebook includes at least one non-constant modulus precoding matrix, the non-constant modulus precoding matrix includes at least one non-constant mode
  • the column vector, the element amplitude value of the non-constant mode column vector constitutes a series of symmetry, the length of the series being not less than 2 and not larger than the dimension of the non-constant mode column vector.
  • the method, user equipment, and base station for determining a precoding matrix indication determine a precoding matrix by using a codebook having a non-constant modulus precoding matrix, where the non-constant modulus precoding matrix has an element
  • the non-constant mode column vector with symmetric or partially symmetric amplitude values enables the non-constant modulus precoding matrix to adjust the shape of the beam, thereby enabling the antenna to concentrate power to the hot spot region, thereby effectively implementing load balancing of the communication system. And improve the performance of the communication system.
  • FIG. 1 is a schematic flow diagram of a method of determining a precoding matrix indication in accordance with an embodiment of the present invention.
  • FIG. 2 is a schematic flow diagram of a method of determining a precoding matrix indication in accordance with another embodiment of the present invention.
  • FIG. 3 is a schematic block diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 4 is a schematic block diagram of a base station according to an embodiment of the present invention. detailed description
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • Wideband Code Division Multiple Access Wideband Code Division Multiple Access
  • the cylinder is called “WCDMA” system
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD LTE time division duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX global interconnected microwave Access
  • a user equipment may be referred to as a terminal (Terminal), a mobile station (Mobile Station, referred to as “MS”), a mobile terminal ( Mobile Terminal), etc.
  • the user equipment can communicate with one or more core networks via a Radio Access Network (“RAN"), for example, the user equipment can be a mobile phone (or “cellular” “Telephone", a computer with a mobile terminal, etc., for example, the user device can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges voice and/or data with the wireless access network.
  • RAN Radio Access Network
  • the base station may be a base station (Base Transceiver Station, called “BTS”) in GSM or CDMA, or may be a base station (NodeB, "NB” called “NB”) in WCDMA, or may be An evolved base station (Evolved Node B, referred to as "eNB or e-NodeB”) in LTE is not limited in the present invention. However, for convenience of description, the following embodiments will be described by taking an eNB as an example.
  • FIG. 1 illustrates a method 100 of determining a precoding matrix indication in accordance with an embodiment of the present invention.
  • the method 100 can be performed by a user equipment, such as by a UE, the method 100 comprising:
  • the method for determining a precoding matrix indication in the embodiment of the present invention determines a precoding matrix by using a codebook having a non-constant modulus precoding matrix, the non-constant modulus precoding matrix having an element amplitude value
  • the symmetric or partially symmetric non-constant mode column vector enables the non-constant modulus precoding matrix to adjust the shape of the beam, thereby enabling the antenna to concentrate power to the hot spot region, thereby effectively implementing load balancing of the communication system and improving The performance of the communication system.
  • the user equipment feeds back one or more precoding matrix indications for indicating the precoding matrix based on the reference signal set, and can fully utilize the time domain and the frequency domain of the channel. Or spatial correlation, which can significantly reduce the overhead of feedback, thereby further improving the performance of the communication system.
  • the user equipment receives the reference signal set sent by the base station.
  • the user equipment may receive a notification sent by the base station through the high layer signaling, or a notification sent by the downlink control channel, where the notification includes the reference signal set, thereby receiving the reference signal set sent by the base station.
  • the base station may be controlled by radio resource control (Radio Resource Control, referred to as "RRC"), or by a physical downlink control channel (Physical Downlink Control Channel, called "PDCCH”), or by enhanced physical downlink control.
  • RRC Radio Resource Control
  • PDCCH Physical Downlink Control Channel
  • An enhanced PDCCH (referred to as "ePDCCH”) transmits the reference signal set to the user equipment.
  • the reference signal set may include one or more reference signals, which may be a cell-specific reference signal (Cell-specific Reference Signal, referred to as “CRS”), or may be a channel state information reference signal (Channel State Information- Reference Signal, the tube is called "CSI-RS").
  • CRS Cell-specific Reference Signal
  • CSI-RS Channel State Information- Reference Signal
  • the reference signal may also be other reference signals, and embodiments of the present invention are not limited thereto. It should also be understood that, in the embodiment of the present invention, the user equipment receiving the reference signal set sent by the base station may also be understood as the user equipment acquiring the reference signal port set.
  • the user equipment selects a precoding matrix from the codebook based on the reference signal set.
  • the codebook includes at least one non-constant modulus precoding matrix, the non-constant modulus precoding matrix includes at least one non-constant mode column vector, and some or all of the element amplitude values of the non-constant mode column vector form a sequence with symmetry, The length of the sequence is not less than 2 and is not larger than the dimension of the non-constant mode column vector.
  • the codebook includes at least one non-constant modulus precoding matrix W having a structure as shown in equation (1):
  • Wj represents the jth column vector of the non-constant modulus precoding matrix W
  • j is a natural number
  • the matrix represents a precoding matrix in which each element has the same amplitude; the non-constant modulus precoding matrix represents a precoding matrix in which not all elements have the same amplitude, that is, in the non-constant modulus precoding matrix, at least one element has different The magnitude of other elements.
  • the non-constant modulus precoding matrix W includes at least one non-constant mode column vector w s , s is a natural number and l ⁇ s ⁇ r, assuming that the non-constant mode column vector ⁇ has a structure as shown in the following equation (2):
  • w s [a ls ⁇ ⁇ ⁇ - ... ⁇ ⁇ (' a ts ⁇ ( 2 )
  • [] ⁇ represents the transpose of a matrix or vector, a ks and the first element of the non-constant mode column vector w s respectively
  • the amplitude and phase are natural numbers and l ⁇ fc ⁇ i, ⁇ is the dimension of the non-constant mode column vector w s , that is, the number of rows of the non-constant modulus precoding matrix W.
  • the phase described in equation (2) The phase derivation of the precoding matrix in the existing constant modulus precoding codebook design may be used, for example, the codebook of 4 antennas or 8 antennas in the existing LTE system, which will not be further described herein.
  • All or part of the element amplitude values of the non-constant mode column vector ⁇ can constitute at least one contiguous sequence A, assuming that the sequence A has a structure as shown in equation (3):
  • A ⁇ ⁇ 2 , ... , ⁇ ⁇ ⁇ ( ⁇ . e ⁇ ) (3)
  • , is the first amplitude value of the series , which is a natural number and 1 ⁇ ⁇ M;
  • the set B is a non-constant mode column vector
  • M is the length of the sequence, M is a natural number and 2 ⁇ ⁇ ⁇ ⁇ ;
  • is also the number of elements of the set ⁇ .
  • the non-constant modulus precoding matrix W may include one of the above-described non-constant mode column vectors w s , and may also include two or more of the above-described non-constant mode column vectors w s .
  • the codebook includes at least one non-constant modulus precoding matrix, each column vector of the non-constant modulus precoding matrix is a non-constant mode column vector, and each element of the non-constant modulus column vector has an amplitude value component A series of symmetry, the length of the sequence is not less than 2 and not greater than the dimension of the non-constant mode column vector.
  • all the element amplitude values of the non-constant mode column vector can form a sequence with symmetry.
  • the amplitude values of the elements of the non-constant mode column vector ⁇ may have symmetry in the sequence formed by the row order.
  • the sequence formed by the row values of the elements of the non-constant mode column vector w s may have symmetry.
  • the sequence whose amplitude values are formed in row order is ⁇ 1, 2, 3, 2, 3, 1 ⁇
  • the non-constant mode column vector w sl After the second row and the third row are exchanged, the sequence A1 having symmetry can be formed in accordance with the row order after row switching.
  • the power or energy distribution of the antenna can be adjusted, so that power can be efficiently concentrated to the hot spot region, and load balancing can also be achieved.
  • the partial element amplitude values of the non-constant mode column vector can also constitute a series with symmetry, for example, the partial element amplitude values of the non-constant mode column vector w s are in a sequence formed by the row order, or The series formed after row exchange can have symmetry.
  • the sequence whose amplitude values are formed in row order is ⁇ 1, 3, 2, 2, 3, 1, 1.5 ⁇ , and some of the element amplitude values can be composed of symmetry.
  • the partial element amplitude value can also constitute a series A1 with symmetry; therefore, by using a precoding matrix including the non-constant mode column vector w s3 or w s4 , the power or energy distribution of the antenna can be adjusted, so that the power can be effectively Focusing on hotspots also enables load balancing.
  • the codebook includes at least one non-constant modulus precoding matrix
  • the non-constant modulus precoding matrix includes at least one non-constant mode column vector, and an element amplitude value of the non-constant modulus column vector
  • the method can be divided into at least two sets, and the element amplitude values of each of the at least two sets can form a series of symmetry, the length of the series being not less than 2 and not larger than the dimension of the non-constant mode column vector.
  • the precoding matrix including the non-constant mode column vector w s5 the power or energy distribution of the antenna can be adjusted, so that power can be efficiently concentrated to the hot spot region, and load balancing can also be achieved.
  • the element amplitude value of the non-constant mode column vector may be selected from a finite set, for example, the amplitude value of the element is a known modulation symbol (such as 16QAM or 64QAM or 256QAM modulation)
  • the magnitude of the sign is the product of a common factor.
  • the user equipment sends a precoding matrix indication corresponding to the selected precoding matrix to the base station.
  • the user equipment may send to the base station through a physical uplink control channel (Physical Uplink Control Channel, referred to as "PUCCH”), or through a Physical Uplink Shared Channel (“PUSCH").
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • the base station may determine the precoding matrix W according to the precoding matrix indication, and send the signal vector s according to the precoding matrix W.
  • the user equipment can determine the signal vector s transmitted by the base station according to the received signal, the precoding matrix W and the channel matrix H or the precoded effective channel HW, noise and interference n.
  • the method for determining a precoding matrix indication determines a precoding matrix by using a codebook having a non-constant modulus precoding matrix, the non-constant modulus precoding matrix having a symmetric or partially symmetric element amplitude value
  • the constant mode column vector enables the non-constant modulus precoding matrix to adjust the shape of the beam, thereby enabling the antenna to concentrate power to the hot spot area, thereby effectively achieving load balancing of the communication system and improving the performance of the communication system.
  • the symmetry sequence composed of the element amplitude values of the non-constant mode column vector satisfies the relationship (6) or (7):
  • M is the length of the sequence; and is the first amplitude value of the sequence, which is a natural number and 1 ⁇ ⁇ ⁇ .
  • the element amplitude value of the non-constant mode column vector can be divided into at least two sets, and the element amplitude values of each of the at least two sets can form a sequence with symmetry and satisfy the above relationship ( 6) or (7
  • the number of symmetry components of the element amplitude values of the non-constant mode column vector may also satisfy the following relation (8) or (9):
  • the symmetry sequence composed of the element amplitude values of the non-constant mode column vector includes two symmetrical parts, and each symmetrical part is an equal ratio sequence or an arithmetic progression column.
  • Each of the symmetric parts is an equal ratio sequence, that is, wherein the symmetric part satisfies the following relationship:
  • the ratio of the ratios can be greater than 1 , can also be less than 1, but not equal to 1 easy to know, its corresponding symmetrical part ⁇ ⁇ , 3 ⁇ 4_! ⁇ ( ⁇ /2) +1 or 3 ⁇ 4 , 3 ⁇ 4_! , . ⁇ , ⁇ ( ⁇ +3)/ 2 is also an equal ratio series.
  • Each of the symmetric portions is an arithmetic progression column, that is, wherein the symmetric portion satisfies the following relationship
  • the tolerance of the difference series can be greater than 0, It can also be less than 0, but not equal to the easy-to-know, its corresponding symmetrical part, ⁇ ... ⁇ or ⁇ , M' ⁇ Ml' ., ⁇ (, ⁇ +3)/2 is also an arithmetic progression.
  • the non-constant modulus precoding matrix is a product of a diagonal matrix and a constant modulus matrix, wherein a diagonal element of the diagonal matrix is composed of elements of the non-constant mode column vector
  • the amplitude value consists of.
  • non-constant modulus precoding matrix W may have the structure shown in the following equation (14):
  • W DU (14)
  • D is a diagonal matrix, and the diagonal elements of the diagonal matrix are composed of the amplitude values of the elements of the non-constant mode column vector ⁇ ;
  • U is a constant modulus matrix.
  • the precoding matrix structure of the equations (15) - (18) is such that the columns of the precoding matrix are orthogonal to each other, which can further reduce interlayer interference. It should be understood that, in various embodiments of the present invention, the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • the method for determining a precoding matrix indication in the embodiment of the present invention determines a precoding matrix by using a codebook having a non-constant modulus precoding matrix, the non-constant modulus precoding matrix having an element amplitude value
  • the symmetric or partially symmetric non-constant mode column vector enables the non-constant modulus precoding matrix to adjust the shape of the beam, thereby enabling the antenna to concentrate power to the hot spot region, thereby effectively implementing load balancing of the communication system and improving The performance of the communication system.
  • a method for determining a precoding matrix indication according to an embodiment of the present invention is described in detail from the perspective of a user equipment.
  • a determination of a precoding matrix indication according to an embodiment of the present invention will be described from the perspective of a base station. Methods.
  • a method 300 for determining a precoding matrix indication may be performed by a base station, for example, by an eNB, and the method 300 includes:
  • the precoding matrix indication corresponds to a precoding matrix selected by the user equipment from the codebook based on the reference signal set, where the codebook includes at least one non-constant model pre- An encoding matrix, the non-constant modulus precoding matrix comprising at least one non-constant mode column vector, the amplitude values of at least two elements of the non-constant mode column vector forming a series of symmetry.
  • the method for determining a precoding matrix indication determines a precoding matrix by using a codebook having a non-constant modulus precoding matrix, the non-constant modulus precoding matrix having a symmetric or partially symmetric element amplitude value
  • the constant mode column vector enables the non-constant modulus precoding matrix to adjust the shape of the beam, thereby enabling the antenna to concentrate power to the hot spot area, thereby effectively achieving load balancing of the communication system and improving the performance of the communication system.
  • the user equipment feeds back one or more precoding matrix indications for indicating the precoding matrix based on the reference signal set, and can fully utilize the time domain and the frequency domain of the channel. Or spatial correlation, which can significantly reduce the overhead of feedback, thereby further improving the performance of the communication system.
  • the symmetry sequence composed of the element amplitude values of the non-constant mode column vector satisfies the following: ( M is an even number); or
  • the element amplitude value of the non-constant mode column vector is composed of
  • the symmetry sequence contains two symmetrical parts, each symmetrical part being a geometric sequence.
  • the symmetrical portion is as described in (10) or (11). It should be understood that the ratio of the ratios may be greater than 1, or may be less than 1, but not equal to 1.
  • the symmetry sequence consisting of the element amplitude values of the non-constant mode column vector comprises two symmetrical parts, each symmetrical part being an arithmetic progression column.
  • the symmetrical portion is as described in (12) or (13). It should be understood that the tolerance of the difference series may be greater than 0, or may be less than 0, but not equal to 0.
  • the non-constant modulus precoding matrix is a product of a diagonal matrix and a constant modulus matrix, wherein a diagonal element of the diagonal matrix is composed of elements of the non-constant mode column vector
  • the amplitude value consists of.
  • the non-constant modulus precoding matrix has the structure described in (14) - (18).
  • the element amplitude value of the non-constant mode column vector may be selected from a finite set, for example, the amplitude value of the element is a known modulation symbol (such as 16QAM or 64QAM or 256QAM modulation)
  • the magnitude of the sign is the product of a common factor. The above selection can reduce the implementation complexity of the eNB precoding operation.
  • the method for determining a precoding matrix indication determines a precoding matrix by using a codebook having a non-constant modulus precoding matrix, the non-constant modulus precoding matrix having a symmetric or partially symmetric element amplitude value
  • the constant mode column vector enables the non-constant modulus precoding matrix to adjust the shape of the beam, thereby enabling the antenna to concentrate power to the hot spot area, thereby effectively achieving load balancing of the communication system and improving the performance of the communication system.
  • FIG. 3 shows a schematic block diagram of a user equipment 500 in accordance with an embodiment of the present invention.
  • the user equipment 500 includes:
  • the receiving module 510 is configured to receive a reference signal set sent by the base station
  • the selecting module 520 is configured to select, according to the reference signal set received by the receiving module 510, a precoding matrix from the codebook, where the codebook includes at least one non-constant modulus precoding matrix, and the non-constant modulus precoding matrix includes at least one Non-constant mode column vector, the amplitude of at least two elements of the non-constant mode column vector.
  • the sending module 530 is configured to send a precoding matrix indication to the base station, where the precoding matrix indicates a precoding matrix selected corresponding to the selecting module 520.
  • the user equipment in the embodiment of the present invention determines a precoding matrix by using a codebook having a non-constant modulus precoding matrix, the non-constant modulus precoding matrix having a symmetric or partially symmetric non-constant modulus column vector of an element amplitude value,
  • the non-constant modulus precoding matrix is capable of adjusting the shape of the beam, thereby enabling the antenna to concentrate power to the hot spot area, thereby effectively achieving load balancing of the communication system and improving the performance of the communication system.
  • the user equipment feeds back one or more precoding matrix indications for indicating the precoding matrix based on the reference signal set, and can fully utilize the time domain and the frequency domain of the channel. Or spatial correlation, which can significantly reduce the overhead of feedback, thereby further improving the performance of the communication system.
  • the selecting module 520 selects a precoding matrix from the codebook, the codebook includes at least one non-constant modulus precoding matrix, and the non-constant modulus precoding matrix includes at least one non-constant modulus column vector, the non The symmetry sequence consisting of the element amplitude values of the constant modulus column vector satisfies the following relationship
  • the first amplitude value of the sequence is a natural number and 1 ⁇ ⁇ M .
  • the symmetry sequence composed of the element amplitude values of the non-constant mode column vector includes two symmetrical parts, and each symmetrical part is an equal ratio sequence.
  • the symmetrical portion is as described in (10) or (11).
  • the symmetrical portion is as described in (12) or (13). It should be understood that the ratio of the ratios may be greater than 1 or less than 1, but not equal to 1.
  • the symmetry sequence consisting of the element amplitude values of the non-constant mode column vector comprises two symmetrical parts, each symmetrical part being an arithmetic progression column.
  • the symmetrical portion is as described in (12) or (13).
  • the tolerance of the difference series may be greater than 0, or may be less than 0, but not equal to 0.
  • the non-constant modulus precoding matrix is a product of a diagonal matrix and a constant modulus matrix, wherein a diagonal element of the diagonal matrix is composed of elements of the non-constant mode column vector
  • the amplitude value consists of.
  • the non-constant modulus precoding matrix has the structure described in (14) - (18).
  • the element amplitude value of the non-constant mode column vector may be selected from a finite set, for example, the amplitude value of the element is a known modulation symbol (such as 16QAM or 64QAM or 256QAM modulation)
  • the magnitude of the sign is the product of a common factor. The above selection can reduce the implementation complexity of the eNB precoding operation.
  • the user equipment 500 may correspond to the user equipment UE in the embodiment of the present invention, and the foregoing and other operations and/or functions of the respective modules in the user equipment 500 are respectively implemented to implement the method 100 in FIG. The process, for the sake of cleanliness, will not be repeated here.
  • the user equipment in the embodiment of the present invention determines a precoding matrix by using a codebook having a non-constant modulus precoding matrix, the non-constant modulus precoding matrix having a symmetric or partially symmetric non-constant modulus column vector of an element amplitude value,
  • the non-constant modulus precoding matrix is capable of adjusting the shape of the beam, thereby enabling the antenna to concentrate power to the hot spot area, thereby effectively achieving load balancing of the communication system and improving the performance of the communication system.
  • FIG. 4 shows a schematic block diagram of a base station 700 in accordance with an embodiment of the present invention.
  • the base station 700 includes:
  • the sending module 710 is configured to send a reference signal set to the user equipment.
  • the receiving module 720 is configured to receive a precoding matrix indication sent by the user equipment, where the precoding matrix indicates that the user equipment corresponds to the precoding matrix selected from the codebook based on the reference signal set, where the codebook includes at least one A non-constant modulus precoding matrix, the non-constant modulus precoding matrix comprising at least one non-constant mode column vector, the amplitude values of at least two elements of the non-constant mode column vector forming a series of symmetry.
  • the symmetry sequence composed of the element amplitude values of the non-constant mode column vector satisfies the relationship:
  • the first amplitude value of the sequence is a natural number and 1 ⁇ ⁇ M.
  • the symmetry sequence composed of the element amplitude values of the non-constant mode column vector includes two symmetrical parts, and each symmetrical part is an equal ratio sequence.
  • the symmetrical portion is as described in (10) or (11). It should be understood that the ratio of the ratios may be greater than 1 or less than 1, but not equal to 1.
  • the symmetry sequence consisting of the element amplitude values of the non-constant mode column vector comprises two symmetrical parts, each symmetrical part being an arithmetic progression column.
  • the symmetrical portion is as described in (12) or (13). It should be understood that the tolerance of the difference series may be greater than 0, or may be less than 0, but not equal to 0.
  • the non-constant modulus precoding matrix is a product of a diagonal matrix and a constant modulus matrix, wherein a diagonal element of the diagonal matrix is composed of elements of the non-constant mode column vector
  • the amplitude value consists of.
  • the non-constant modulus precoding matrix has the structure described in (14) - (18).
  • the element amplitude value of the non-constant mode column vector may be selected from a finite set, for example, the amplitude value of the element is a known modulation symbol (such as 16QAM or 64QAM or 256QAM modulation)
  • the magnitude of the sign is the product of a common factor. The above selection can reduce the implementation complexity of the eNB precoding operation.
  • the base station 700 may correspond to the base station eNB in the embodiment of the present invention, and the foregoing and other operations and/or functions of the respective modules in the base station 700 are respectively implemented in order to implement the corresponding process of the method 300 in FIG.
  • the tube is clean and will not be described here.
  • the base station determines a precoding matrix by using a codebook having a non-constant modulus precoding matrix having a symmetric or partially symmetric non-constant modular column vector of element amplitude values, such that The non-constant modulus precoding matrix can adjust the shape of the beam, so that the antenna can concentrate power to the hot spot area, thereby effectively implementing load balancing of the communication system and improving the performance of the communication system.
  • system and “network” are often used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists separately, and both A and B exist, exist alone B these three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • B corresponding to A means that B is associated with A, the root According to A, B can be determined.
  • determining B according to A does not mean that B is only determined according to A, but may also be determined based on A and/or other information.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • a storage medium includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, and the program code can be stored. Medium.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)

Abstract

本发明公开了一种确定预编码矩阵指示的方法、用户设备和基站。该方法包括:接收基站发送的参考信号集;基于该参考信号集,从码本中选择预编码矩阵,该码本至少包括一个非恒模预编码矩阵,该非恒模预编码矩阵至少包括一个非恒模列矢量,该非恒模列矢量的至少两个元素的幅度值组成具有对称性的数列;向该基站发送预编码矩阵指示,该预编码矩阵指示相应于所选择的预编码矩阵。本发明实施例的确定预编码矩阵指示的方法、用户设备和基站,由于采用的码本包括的非恒模预编码矩阵能够调整波束的形状,从而使得天线能够将功率集中到热点区域,由此能够有效地实现负载平衡。

Description

确定预编码矩阵指示的方法、 用户设备和基站 技术领域
本发明涉及通信领域, 尤其涉及通信领域中确定预编码矩阵指示的方 法、 用户设备和基站。 背景技术
通过发射波束赋形 ( Beam Forming, 筒称为 "BF" )或预编码技术, 多 入多出 (Multiple Input Multiple Output, 筒称为 "MIMO" )无线系统可以得 到分集和阵列增益。 利用 BF 或者预编码的典型系统通常可以表示为 y = H W s + n , 其中 y为接收信号矢量, H为信道矩阵, W为预编码矩阵, s为发射信号矢量, n为测量噪声和干扰。
最优的预编码通常需要发射机完全已知信道状态信息 (Channel State Information, 筒称为 "CSI" )。 常用的方法是用户设备( User Equipment, 筒 称为 "UE" )对瞬时 CSI进行量化, 并反馈给基站( evolved Node B, eNB )。 现有长期演进( Long Term Evolution, 筒称为 "LTE" )第八版本( Release 8 , 筒称为 "R8" ) 系统反馈的 CSI信息包括: 秩指示 (Rank Indicator, 筒称为 "RI" )、 预编码矩阵指示(Precoding Matrix Indicator, 筒称为 "ΡΜΓ )和信 道质量指示(Channel Quality Information, 筒称为 "CQI" )信息等, 其中 RI 和 PMI分别指示使用的层数和预编码矩阵。通常所使用的预编码矩阵的集合 称为码本或预编码码本, 码本中的每个预编码矩阵称为码字。
为了降低系统费用, 同时达到更高的系统容量和覆盖要求, 有源天线系 统( Active Antenna System , 筒称为 "AAS " )在实践中已广泛部署, 目前即 将启动的 LTE第十二版本(Release 12, 筒称为 "R12" )标准正在考虑引入 AAS系统, 以增强系统的通信性能。 在有源天线系统(AAS )中, 收发信机 直接与天线阵元相连接, 可以直接调整每个阵元的幅度和相位, 从而不仅可 以调整波束的方向, 还可以调整波束的形状。
随着数据业务的发展, 特别是异构网中热点区域的出现, 要求网络系统 能够自适应网络负载的不均衡, 例如针对热点区域提供更好的功率等。 AAS 为解决负载不均衡问题提供了一种有益的方式, 即可以将功率集中于热点区 域, 同时减小对非热点区域的干扰。 然而, 目前的 LTE R8 系统采用单一的码本, 其中 4 天线码本基于 Householder变换设计, 该码本的预编码矩阵的各个元素都具有相同的幅度, 即满足恒模特性, 从而使得预编码矩阵只能调整波束的方向, 不能调整波束 的形状。 LTE第十版本(Release 10, 筒称为 "R10" ) 系统则针对 8天线进 一步引入了双码本设计,但该双码本包括的预编码矩阵也只能调整波束的方 向, 不能调整波束的形状。
因而, 上述码本都无法使得通信系统实现负载均衡。 发明内容
本发明实施例提供了一种确定预编码矩阵指示的方法、 用户设备和基 站, 采用的码本包括的非恒模预编码矩阵能够调整波束的形状, 从而使得通 信系统能够有效地实现负载平衡。
一方面, 本发明实施例提供了一种确定预编码矩阵指示的方法, 该方法 包括: 接收基站发送的参考信号集; 基于该参考信号集, 从码本中选择预编 码矩阵, 该码本至少包括一个非恒模预编码矩阵, 该非恒模预编码矩阵至少 包括一个非恒模列矢量,该非恒模列矢量的元素幅度值组成具有对称性的数 歹 ij , 该数列的长度不小于 2且不大于该非恒模列矢量的维度; 向该基站发送 预编码矩阵指示, 该预编码矩阵指示相应于所选择的预编码矩阵。
另一方面, 本发明实施例提供了一种确定预编码矩阵指示的方法, 该方 法包括: 向用户设备发送参考信号集; 接收该用户设备发送的预编码矩阵指 示, 该预编码矩阵指示与该用户设备基于该参考信号集从码本中选择的预编 码矩阵相应, 其中, 该码本至少包括一个非恒模预编码矩阵, 该非恒模预编 码矩阵至少包括一个非恒模列矢量,该非恒模列矢量的元素幅度值组成具有 对称性的数列, 该数列的长度不小于 2且不大于该非恒模列矢量的维度。
再一方面, 本发明实施例提供了一种用户设备, 该用户设备包括: 接收 模块, 用于接收基站发送的参考信号集; 选择模块, 用于基于该接收模块接 收的该参考信号集, 从码本中选择预编码矩阵, 该码本至少包括一个非恒模 预编码矩阵, 该非恒模预编码矩阵至少包括一个非恒模列矢量, 该非恒模列 矢量的元素幅度值组成具有对称性的数列,该数列的长度不小于 2且不大于 该非恒模列矢量的维度; 发送模块, 用于向该基站发送预编码矩阵指示, 该 预编码矩阵指示相应于该选择模块所选择的预编码矩阵。 再一方面, 本发明实施例提供了一种基站, 该基站包括: 发送模块, 用 于向用户设备发送参考信号集; 接收模块, 用于接收该用户设备发送的预编 码矩阵指示, 该预编码矩阵指示与该用户设备基于该参考信号集从码本中选 择的预编码矩阵相应, 其中, 该码本至少包括一个非恒模预编码矩阵, 该非 恒模预编码矩阵至少包括一个非恒模列矢量, 该非恒模列矢量的元素幅度值 组成具有对称性的数列, 该数列的长度不小于 2且不大于该非恒模列矢量的 维度。
基于上述技术方案, 本发明实施例的确定预编码矩阵指示的方法、 用户 设备和基站, 通过在具有非恒模预编码矩阵的码本中确定预编码矩阵, 该非 恒模预编码矩阵具有元素幅度值对称或部分对称的非恒模列矢量,使得该非 恒模预编码矩阵能够调整波束的形状,从而使得天线能够将功率集中到热点 区域, 由此能够有效地实现通信系统的负载平衡, 并提升通信系统的性能。 附图说明
为了更清楚地说明本发明实施例的技术方案, 下面将对本发明实施例中 所需要使用的附图作筒单地介绍, 显而易见地, 下面所描述的附图仅仅是本 发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的 前提下, 还可以根据这些附图获得其他的附图。
图 1 是根据本发明实施例的确定预编码矩阵指示的方法的示意性流程 图。
图 2是根据本发明另一实施例的确定预编码矩阵指示的方法的示意性流 程图。
图 3是根据本发明实施例的用户设备的示意性框图。
图 4是根据本发明实施例的基站的示意性框图。 具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行 清楚、 完整地描述, 显然, 所描述的实施例是本发明的一部分实施例, 而不 是全部实施例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创 造性劳动的前提下所获得的所有其他实施例, 都应属于本发明保护的范围。
应理解, 本发明实施例的技术方案可以应用于各种通信系统, 例如: 全 球移动通讯 ( Global System of Mobile communication, 筒称为 "GSM" )系统、 码分多址(Code Division Multiple Access, 筒称为 "CDMA" ) 系统、 宽带码 分多址( Wideband Code Division Multiple Access, 筒称为 "WCDMA" )系统、 通用分组无线业务(General Packet Radio Service, 筒称为 "GPRS" )、 长期 演进( Long Term Evolution, 筒称为 "LTE" )系统、 LTE频分双工( Frequency Division Duplex,筒称为 "FDD" )系统、 LTE时分双工( Time Division Duplex, 筒称为 "TDD" )、 通用移动通信系统 ( Universal Mobile Telecommunication System,筒称为 "UMTS" ),全球互联微波接入( Worldwide Interoperability for Microwave Access , 筒称为 " WiMAX" )通信系统等。
还应理解,在本发明实施例中,用户设备( User Equipment,筒称为 "UE" ) 可称之为终端 (Terminal ), 移动台 (Mobile Station, 筒称为 "MS" )、 移动 终端 (Mobile Terminal )等, 该用户设备可以经无线接入网 (Radio Access Network, 筒称为 "RAN" )与一个或多个核心网进行通信, 例如, 用户设备 可以是移动电话(或称为 "蜂窝" 电话)、 具有移动终端的计算机等, 例如, 用户设备还可以是便携式、 袖珍式、 手持式、 计算机内置的或者车载的移动 装置, 它们与无线接入网交换语音和 /或数据。
在本发明实施例中, 基站可以是 GSM 或 CDMA 中的基站 (Base Transceiver Station, 筒称为 "BTS" ), 也可以是 WCDMA中的基站( NodeB , 筒称为 "NB" ),还可以是 LTE中的演进型基站( Evolved Node B,筒称为 "eNB 或 e-NodeB" ), 本发明并不限定。 但为描述方便, 下述实施例将以 eNB为例 进行说明。
图 1示出了根据本发明实施例的确定预编码矩阵指示的方法 100。 该方 法 100可以由用户设备执行, 例如由 UE执行, 该方法 100包括:
S110, 接收基站发送的参考信号集;
S120, 基于该参考信号集, 从码本中选择预编码矩阵, 该码本至少包括 一个非恒模预编码矩阵, 该非恒模预编码矩阵至少包括一个非恒模列矢量, 该非恒模列矢量的至少两个元素的幅度值组成具有对称性的数列;
S130, 向该基站发送预编码矩阵指示, 该预编码矩阵指示相应于所选择 的预编码矩阵。
因此, 本发明实施例的确定预编码矩阵指示的方法, 通过在具有非恒模 预编码矩阵的码本中确定预编码矩阵, 该非恒模预编码矩阵具有元素幅度值 对称或部分对称的非恒模列矢量,使得该非恒模预编码矩阵能够调整波束的 形状, 从而使得天线能够将功率集中到热点区域, 由此能够有效地实现通信 系统的负载平衡, 并提升通信系统的性能。
另一方面, 本发明实施例的确定预编码矩阵指示的方法, 用户设备基于 参考信号集反馈一个或者多个用于指示预编码矩阵的预编码矩阵指示, 能够 充分利用信道的时域、 频域或空间的相关性, 从而能够显著地降低反馈的开 销, 由此能够进一步提升通信系统的性能。
在 S110中, 用户设备接收基站发送的参考信号集。
具体地, 用户设备可以接收基站通过高层信令发送的通知, 或通过下行 控制信道发送的通知, 该通知包括参考信号集, 由此接收基站发送的参考信 号集。 例如, 基站可以通过无线资源控制 (Radio Resource Control, 筒称为 " RRC " ) 信令, 或通过物理下行控制信道 (Physical Downlink Control Channel, 筒称为 "PDCCH" ), 或者通过增强的物理下行控制信道( enhanced PDCCH, 筒称为 "ePDCCH" ), 向用户设备发送该参考信号集。
该参考信号集可以包括一个或多个参考信号,该参考信号可以是小区特 定参考信号(Cell-specific Reference Signal, 筒称为 "CRS" ), 也可以是信道 状态信息参考信号 ( Channel State Information- Reference Signal , 筒称为 "CSI-RS" )。
应理解,该参考信号还可以是其它参考信号,本发明实施例并不限于此。 还应理解, 在本发明实施例中, 用户设备接收基站发送的参考信号集也可以 理解为用户设备获取参考信号端口集。
在 S120中, 用户设备基于该参考信号集, 从码本中选择预编码矩阵。 该码本至少包括一个非恒模预编码矩阵, 该非恒模预编码矩阵至少包括一个 非恒模列矢量,该非恒模列矢量的部分或全部元素幅度值组成具有对称性的 数列, 该数列的长度不小于 2且不大于该非恒模列矢量的维度。 下面将对该 码本进行详细描述。
假设该码本至少包括的一个非恒模预编码矩阵 W具有如等式(1 )所示 的结构:
Figure imgf000007_0001
其中, Wj表示非恒模预编码矩阵 W的第 j 个列矢量, j 为自然数且
1 < j≤r , r为该非恒模预编码矩阵 W的秩或列数。 应理解, 恒模预编码矩 阵表示各元素都具有相同的幅度的预编码矩阵; 非恒模预编码矩阵表示并非 所有元素都具有相同的幅度的预编码矩阵, 即在非恒模预编码矩阵中, 至少 有一个元素具有不同于其它元素的幅度。
该非恒模预编码矩阵 W至少包括一个非恒模列矢量 ws, s 为自然数且 l<s<r, 假设非恒模列矢量 ^具有如下列等式(2)所示的结构:
ws = [als^ α^θ- … ― θ(' ats^ ( 2 ) 其中 []τ表示矩阵或者矢量的转置, aks和 分别为非恒模列矢量 ws的第 个元素的幅度和相位, 为自然数且 l≤fc≤i, ί为该非恒模列矢量 ws的维 度, 即该非恒模预编码矩阵 W的行数。 此外, 式(2) 中所述相位可以采用 现有恒模预编码码本设计中预编码矩阵的相位导出,例如现有 LTE 系统中 4 天线或者 8天线的码本, 此处不进一步赘述。
该非恒模列矢量 ^的全部或部分元素幅度值能够组成至少一个具有对 称性的数列 A, 假设该数列 A具有如等式(3)所示的结构:
A = β α2, ... , αΜ } (β. e Β) (3) 其中, ,为数列 Α的第 个幅度值, 为自然数且 1≤ ≤M; 集合 B为 非恒模列矢量 ws的各元素的幅度值所形成的集合; M为该数列的长度, M 为自然数且 2≤Μ≤ί; ί也为集合 Β的元素数量。
那么该数列 Α具有对称性意味着该数列 A满足下列等式(4)或 (5): a = u, α2 = αΜ_λ , ... , αΜ/2 = β(Μ/2)+1 ( Μ为偶数 ) ( 4 ) α,=αΜ, α2Μ_λ, ... , β_1)/2 = β(Μ+3)/2 ( Μ为奇数) (5) 在本发明实施例中,非恒模预编码矩阵 W可以包括一个上述非恒模列矢 量 ws, 也可以包括两个或更多的上述非恒模列矢量 ws。 可选地, 该码本至 少包括一个非恒模预编码矩阵, 该非恒模预编码矩阵的每个列矢量都为非恒 模列矢量, 每个非恒模列矢量的元素幅度值组成具有对称性的数列, 该数列 的长度不小于 2且不大于该非恒模列矢量的维度。
在本发明实施例中, 上述非恒模列矢量的全部元素幅度值能够组成具有 对称性的数列,例如,非恒模列矢量 ^的各元素幅度值按照行次序所形成的 数列可以具有对称性;非恒模列矢量 ws的各元素幅度值经过行交换后所形成 的数列可以具有对称性。 例如, 对于一个 6维的非恒模列矢量 wsl , 其幅度值按照行次序可以形 成数歹l Al = {l, 3, 2, 2, 3, 1} , 该数列 A1具有对称性。 由此, 采用包括该非恒 模列矢量的预编码矩阵, 可以调整天线的功率或能量的分布, 从而可以有效 地将功率集中到热点区域, 由此能够实现负载平衡。
又例如, 对于一个 6维的非恒模列矢量 ws2 , 其幅度值按照行次序形成 的数列为 {1, 2, 3, 2, 3, 1} , 将该非恒模列矢量 wsl的第 2行与第 3行交换后, 按照行交换后的行次序可以形成具有对称性的数列 Al。 同样地, 采用包括 该非恒模列矢量的预编码矩阵, 可以调整天线的功率或能量的分布, 从而可 以有效地将功率集中到热点区域, 也能够实现负载平衡。
在本发明实施例中, 上述非恒模列矢量的部分元素幅度值也能够组成具 有对称性的数列,例如,非恒模列矢量 ws的部分元素幅度值按照行次序所形 成的数列, 或经过行交换后所形成的数列可以具有对称性。
例如, 对于一个 7维的非恒模列矢量 ws3 , 其幅度值按照行次序形成的 数列为 {1, 3, 2, 2, 3, 1,1.5} , 其部分元素幅度值能够组成具有对称性的数列 A1; 对于一个 7维的非恒模列矢量 ws4 , 其幅度值按照行次序形成的数列为 {1, 2, 3, 2, 3, 1,1.5} , 经过行交换后, 其部分元素幅度值也能够组成具有对称 性的数列 A1 ; 因此, 采用包括该非恒模列矢量 ws3或 ws4的预编码矩阵, 可 以调整天线的功率或能量的分布, 从而可以有效地将功率集中到热点区域, 也能够实现负载平衡。
在本发明实施例中, 可选地, 该码本至少包括一个非恒模预编码矩阵, 该非恒模预编码矩阵至少包括一个非恒模列矢量,该非恒模列矢量的元素幅 度值能够划分成至少两个集合, 该至少两个集合中的每个集合的元素幅度值 都能够组成具有对称性的数列, 该数列的长度不小于 2且不大于该非恒模列 矢量的维度。
例如, 对于非恒模列矢量 ws5 , 其幅度值按照行次序形成的数列为
{1, 1.5, 3, 2, 1, 1.5, 1, 2} ,该非恒模列矢量的元素幅度值可以划分成至少两个 集合 B1和 B2, 51 = {1, 2, 3, 2, 1} , 52 = {1.5, 1, 1.5} , 集合 B1和 B2分另) J能 够组成具有对称性的数列 A2 和 A3 , 其中, = {1, 2, 3, 2, 1} , A3 = {1.5, 1, 1.5}。 同样地, 采用包括该非恒模列矢量 ws5的预编码矩阵, 可 以调整天线的功率或能量的分布, 从而可以有效地将功率集中到热点区域, 也能够实现负载平衡。 进一步地, 在本发明实施例中, 上述非恒模列矢量的元素幅度值可以从 有限集合中选取, 例如, 所述元素的幅度值是已知的调制符号 (如 16QAM 或者 64QAM或者 256QAM中调制符号)的幅度与一个公共因子的乘积。 上 述选择可以降低 UE选择预编码矩阵操作的实现复杂度。
在 S130中, 用户设备向该基站发送与所选择的预编码矩阵对应的预编 码矩阵指示。
具体地, 例如, 用户设备可以通过物理上行控制信道(Physical Uplink Control Channel , 筒称为 "PUCCH" ), 或通过物理上行共享信道( Physical Uplink Shared Channel, 筒称为 "PUSCH" ), 向基站发送该预编码矩阵指示。
应理解, 在本发明实施例中, 当基站接收到该预编码矩阵指示后, 基站 可以根据该预编码矩阵指示,确定预编码矩阵 W ,并根据该预编码矩阵 W发 射信号矢量 s。 用户设备可以根据接收的信号、 预编码矩阵 W和信道矩阵 H 或者预编码后的有效信道 HW、 噪声和干扰 n , 确定基站发射的信号矢量 s。
因此, 本发明实施例的确定预编码矩阵指示的方法, 通过在具有非恒模 预编码矩阵的码本中确定预编码矩阵, 该非恒模预编码矩阵具有元素幅度值 对称或部分对称的非恒模列矢量,使得该非恒模预编码矩阵能够调整波束的 形状, 从而使得天线能够将功率集中到热点区域, 由此能够有效地实现通信 系统的负载平衡, 并提升通信系统的性能。
在本发明实施例中, 可选地, 该非恒模列矢量的元素幅度值组成的具有 对称性的数列满足以 关系式(6 )或 (7 ):
Figure imgf000010_0001
其中, M为该数列的长度; ,为该数列的第 个幅度值, 为自然数且 1≤ ≤ Μ 。
例如, 对于 8天线的非恒模预编码矩阵 W , 该非恒模预编码矩阵 W包 括的非恒模列矢量 ws的元素幅度值可以组成具有对称性的数列 A4 , A4 = {1, 1.5, 2, 2.5, 2.5, 2, 1.5, 1} ; 再例如, 对于 10天线的非恒模预编码矩 阵 W , 非恒模列矢量 ws的元素幅度值可以组成具有对称性的数列 A5 , A5 = {1, 1.25, 1.5, 1.75, 2, 2, 1.75, 1.5, 1.25, 1}。 再例如, 该非恒模列矢量的元素幅度值能够划分成至少两个集合, 该至 少两个集合中的每个集合的元素幅度值都能够组成具有对称性的数列, 并满 足上述关系式(6)或 (7
应理解, 在本发明实施例中, 可选地, 该非恒模列矢量的元素幅度值组 成的具有对称性的数 也可以满足以下关系式(8)或 (9):
( 为偶数) (8)
( 为奇数) (9)
Figure imgf000011_0001
其中, Μ为该数列的长度; α,为该数列的第 个幅度值, /为自然数且 1≤ ≤ Μ
在本发明实施例中, 可选地, 该非恒模列矢量的元素幅度值组成的具有 对称性的数列包含两个对称部分,每个对称部分为等比数列或者等差数列。
具体地,例如所述对称性的数列包含的两个对称部分分别为 βρβ2,..., Μ/2 和 …, ( ΜM//22))++1l ,, 其 W中 Μ 1Υ1为 ^偶数, Α "l = -α "ΜM,'αw 22 = - βΜ- ·· βΜ/2 = β(Μ/2)+1,
或者所述对称性的数列包含的两个对称部分分别为 ,^,...,^^/2 Μ αΜ— 1 3)/2, 其中 ^ ^为奇数, "1 = αΜ-1 "' "(Μ— 1)/2 — "(Μ 3)/2
所述每个对称部分为等比数列, 即其中对称部分满足以下关系式:
a, a a
(M为偶数) (10) a0 a a {Mil) 或者 a,
^ = ^ = ...= {(M-l)ll)-1 (M为奇数) (11) a2 a3 a((M-l)/2) 应理解, 该等比数列的公比可以大于 1, 也可以小于 1, 但不等于 1 易知, 其对应的另一个对称部分 αΜ , ¾_! β(Μ/2)+1或者 ¾ , ¾_! ,.··, α(Μ+3)/2 同样为一个等比数列。
所述每个对称部分为为等差数列, 即其中对称部分满足以下关系式
α — α2 = α2一 α3 =…二 i — α、Μ 12、 (Μ为偶数) (12) 或者 a ― αΊ = αΊ— a a ',(( -l)/2)-l "(( -l)/2 (M为奇数) (13) 应理解, 该等差数列的公差可以大于 0, 也可以小于 0, 但不等于 易知, 其对应的另一个对称部分 , ^…^^^或者^, M'^M-l' .,α (,Μ+3)/2 同样为一个等差数列。
在本发明实施例中, 可选地, 该非恒模预编码矩阵为对角矩阵与恒模矩 阵的乘积, 其中, 该对角矩阵的对角线元素由该非恒模列矢量的各元素的幅 度值组成。
具体地, 该非恒模预编码矩阵 W可以具有如下等式(14)所示的结构:
W = DU ( 14) 其中, D为对角矩阵,该对角矩阵的对角线元素由该非恒模列矢量 ^的 各元素的幅度值组成; U为恒模矩阵。
例如, 对角矩阵 D以及恒模矩阵 U分别如下列等式(15) - (17)所示:
D = άΛ d d N/2 d N/2+1 d N/2+2 d N (15)
Y Y
U = (16) ei<pY -ei<pY
Figure imgf000012_0001
, Γ π π „ π π π
— 2,— 4,— 8,···, 32,16,8,···° 进一步地, 式 (15)所述对角化矩阵矩阵的对角线元素满足
Ν
Figure imgf000012_0002
式(15) - (18)所述预编码矩阵结构, 使得所述预编码矩阵各列之间 相互正交, 可以进一步减少层间干扰。 应理解, 在本发明的各种实施例中, 上述各过程的序号的大小并不意味 着执行顺序的先后, 各过程的执行顺序应以其功能和内在逻辑确定, 而不应 对本发明实施例的实施过程构成任何限定。
因此, 本发明实施例的确定预编码矩阵指示的方法, 通过在具有非恒模 预编码矩阵的码本中确定预编码矩阵, 该非恒模预编码矩阵具有元素幅度值 对称或部分对称的非恒模列矢量,使得该非恒模预编码矩阵能够调整波束的 形状, 从而使得天线能够将功率集中到热点区域, 由此能够有效地实现通信 系统的负载平衡, 并提升通信系统的性能。
上文中结合图 1 , 从用户设备的角度详细描述了根据本发明实施例的确 定预编码矩阵指示的方法, 下面将结合图 2, 从基站的角度描述根据本发明 实施例的确定预编码矩阵指示的方法。
如图 2所示,根据本发明实施例的确定预编码矩阵指示的方法 300可以 由基站执行, 例如由 eNB执行, 该方法 300包括:
S310, 向用户设备发送参考信号集;
S320, 接收该用户设备发送的预编码矩阵指示, 该预编码矩阵指示与该 用户设备基于该参考信号集从码本中选择的预编码矩阵相应, 其中, 该码本 至少包括一个非恒模预编码矩阵, 该非恒模预编码矩阵至少包括一个非恒模 列矢量, 该非恒模列矢量的至少两个元素的幅度值组成具有对称性的数列。
因此, 本发明实施例的确定预编码矩阵指示的方法, 通过在具有非恒模 预编码矩阵的码本中确定预编码矩阵, 该非恒模预编码矩阵具有元素幅度值 对称或部分对称的非恒模列矢量,使得该非恒模预编码矩阵能够调整波束的 形状, 从而使得天线能够将功率集中到热点区域, 由此能够有效地实现通信 系统的负载平衡, 并提升通信系统的性能。
另一方面, 本发明实施例的确定预编码矩阵指示的方法, 用户设备基于 参考信号集反馈一个或者多个用于指示预编码矩阵的预编码矩阵指示, 能够 充分利用信道的时域、 频域或空间的相关性, 从而能够显著地降低反馈的开 销, 由此能够进一步提升通信系统的性能。
在本发明实施例中, 该非恒模列矢量的元素幅度值组成的具有对称性的 数列满足以下关 : ( M为偶数); 或
Figure imgf000013_0001
≤, ≤ M+i)/2 ( M为奇数 );
[aM ― aM-l -' ·"' - β(Μ+1)/2 其中, M为该数列的长度; 为该数列的第 个幅度值, 为自然数且
1≤ ≤ M。
在本发明实施例中, 可选地, 该非恒模列矢量的元素幅度值组成的具有 对称性的数列包含两个对称部分, 每个对称部分为等比数列。 具体地, 例如 所述对称部分如(10 )或者(11 )所述。 应理解, 该等比数列的公比可以大 于 1 , 也可以小于 1 , 但不等于 1。
可选地, 该非恒模列矢量的元素幅度值组成的具有对称性的数列包含两 个对称部分,每个对称部分为等差数列。 具体地, 例如所述对称部分如( 12 ) 或者(13 )所述。 应理解, 该等差数列的公差可以大于 0, 也可以小于 0, 但不等于 0。
在本发明实施例中, 可选地, 该非恒模预编码矩阵为对角矩阵与恒模矩 阵的乘积, 其中, 该对角矩阵的对角线元素由该非恒模列矢量的各元素的幅 度值组成。 具体地, 例如所述非恒模预编码矩阵具有 (14 ) - ( 18 )所述的 结构。
进一步地, 在本发明实施例中, 上述非恒模列矢量的元素幅度值可以从 有限集合中选取, 例如, 所述元素的幅度值是已知的调制符号 (如 16QAM 或者 64QAM或者 256QAM中调制符号)的幅度与一个公共因子的乘积。 上 述选择可以降低 eNB预编码操作的实现复杂度。
应理解, eNB侧描述的 UE与 eNB的交互及相关特性、 功能等与 UE侧 的描述相应, 为了筒洁, 在此不再赘述。
因此, 本发明实施例的确定预编码矩阵指示的方法, 通过在具有非恒模 预编码矩阵的码本中确定预编码矩阵, 该非恒模预编码矩阵具有元素幅度值 对称或部分对称的非恒模列矢量,使得该非恒模预编码矩阵能够调整波束的 形状, 从而使得天线能够将功率集中到热点区域, 由此能够有效地实现通信 系统的负载平衡, 并提升通信系统的性能。
上文中结合图 1至图 2, 详细描述了根据本发明实施例的确定预编码矩 阵指示的方法, 下面将结合图 3至图 4, 详细描述根据本发明实施例的用户 设备和基站。
图 3示出了根据本发明实施例的用户设备 500的示意性框图。如图 3所 示, 该用户设备 500包括:
接收模块 510, 用于接收基站发送的参考信号集;
选择模块 520, 用于基于该接收模块 510接收的该参考信号集, 从码本 中选择预编码矩阵, 该码本至少包括一个非恒模预编码矩阵, 该非恒模预编 码矩阵至少包括一个非恒模列矢量, 该非恒模列矢量的至少两个元素的幅度 值组成具有对称性的数列;
发送模块 530, 用于向该基站发送预编码矩阵指示, 该预编码矩阵指示 相应于该选择模块 520所选择的预编码矩阵。
因此, 本发明实施例的用户设备, 通过在具有非恒模预编码矩阵的码本 中确定预编码矩阵, 该非恒模预编码矩阵具有元素幅度值对称或部分对称的 非恒模列矢量, 使得该非恒模预编码矩阵能够调整波束的形状, 从而使得天 线能够将功率集中到热点区域, 由此能够有效地实现通信系统的负载平衡, 并提升通信系统的性能。
另一方面, 本发明实施例的确定预编码矩阵指示的方法, 用户设备基于 参考信号集反馈一个或者多个用于指示预编码矩阵的预编码矩阵指示, 能够 充分利用信道的时域、 频域或空间的相关性, 从而能够显著地降低反馈的开 销, 由此能够进一步提升通信系统的性能。
在本发明实施例中, 选择模块 520从码本中选择预编码矩阵, 该码本至 少包括一个非恒模预编码矩阵, 该非恒模预编码矩阵至少包括一个非恒模列 矢量, 该非恒模列矢量的元素幅度值组成的具有对称性的数列满足以下关系
Figure imgf000015_0001
其中, M为该数列的长度; 为该数列的第 个幅度值, 为自然数且 1≤ ≤ M 。
在本发明实施例中, 可选地, 该非恒模列矢量的元素幅度值组成的具有 对称性的数列包含两个对称部分, 每个对称部分为等比数列。 具体地, 所述 对称部分如( 10 )或者( 11 )所述。 具体地, 例如所述对称部分如( 12 )或 者(13 )所述。 应理解, 该等比数列的公比可以大于 1 , 也可以小于 1 , 但 不等于 1。
可选地, 该非恒模列矢量的元素幅度值组成的具有对称性的数列包含两 个对称部分,每个对称部分为等差数列。 具体地, 例如所述对称部分如( 12 ) 或者(13 )所述。 应理解, 该等差数列的公差可以大于 0, 也可以小于 0, 但不等于 0。 在本发明实施例中, 可选地, 该非恒模预编码矩阵为对角矩阵与恒模矩 阵的乘积, 其中, 该对角矩阵的对角线元素由该非恒模列矢量的各元素的幅 度值组成。 具体地, 例如所述非恒模预编码矩阵具有 (14 ) - ( 18 )所述的 结构。
进一步地, 在本发明实施例中, 上述非恒模列矢量的元素幅度值可以从 有限集合中选取, 例如, 所述元素的幅度值是已知的调制符号 (如 16QAM 或者 64QAM或者 256QAM中调制符号)的幅度与一个公共因子的乘积。 上 述选择可以降低 eNB预编码操作的实现复杂度。
根据本发明实施例的用户设备 500可对应于本发明实施例中的用户设备 UE, 并且用户设备 500中的各个模块的上述和其它操作和 /或功能分别为了 实现图 1中的方法 100的相应流程, 为了筒洁, 在此不再赘述。
因此, 本发明实施例的用户设备, 通过在具有非恒模预编码矩阵的码本 中确定预编码矩阵, 该非恒模预编码矩阵具有元素幅度值对称或部分对称的 非恒模列矢量, 使得该非恒模预编码矩阵能够调整波束的形状, 从而使得天 线能够将功率集中到热点区域, 由此能够有效地实现通信系统的负载平衡, 并提升通信系统的性能。
图 4示出了根据本发明实施例的基站 700的示意性框图。 如图 4所示, 该基站 700包括:
发送模块 710, 用于向用户设备发送参考信号集;
接收模块 720, 用于接收该用户设备发送的预编码矩阵指示, 该预编码 矩阵指示与该用户设备基于该参考信号集从码本中选择的预编码矩阵相应, 其中, 该码本至少包括一个非恒模预编码矩阵, 该非恒模预编码矩阵至少包 括一个非恒模列矢量,该非恒模列矢量的至少两个元素的幅度值组成具有对 称性的数列。
在本发明实施例中, 可选地, 该非恒模列矢量的元素幅度值组成的具有 对称性的数列满足以 关系式:
Figure imgf000016_0001
其中, M为该数列的长度; 为该数列的第 个幅度值, 为自然数且 1≤ ≤ M。
在本发明实施例中, 可选地, 该非恒模列矢量的元素幅度值组成的具有 对称性的数列包含两个对称部分, 每个对称部分为等比数列。 具体地, 例如 所述对称部分如(10 )或者(11 )所述。 应理解, 该等比数列的公比可以大 于 1 , 也可以小于 1 , 但不等于 1。
可选地, 该非恒模列矢量的元素幅度值组成的具有对称性的数列包含两 个对称部分,每个对称部分为等差数列。 具体地, 例如所述对称部分如( 12 ) 或者(13 )所述。 应理解, 该等差数列的公差可以大于 0, 也可以小于 0, 但不等于 0。
在本发明实施例中, 可选地, 该非恒模预编码矩阵为对角矩阵与恒模矩 阵的乘积, 其中, 该对角矩阵的对角线元素由该非恒模列矢量的各元素的幅 度值组成。 具体地, 例如所述非恒模预编码矩阵具有 (14 ) - ( 18 )所述的 结构。
进一步地, 在本发明实施例中, 上述非恒模列矢量的元素幅度值可以从 有限集合中选取, 例如, 所述元素的幅度值是已知的调制符号 (如 16QAM 或者 64QAM或者 256QAM中调制符号)的幅度与一个公共因子的乘积。 上 述选择可以降低 eNB预编码操作的实现复杂度。
根据本发明实施例的基站 700可对应于本发明实施例中的基站 eNB ,并 且基站 700中的各个模块的上述和其它操作和 /或功能分别为了实现图 2中的 方法 300的相应流程, 为了筒洁, 在此不再赘述。
因此, 本发明实施例的基站, 通过在具有非恒模预编码矩阵的码本中确 定预编码矩阵,该非恒模预编码矩阵具有元素幅度值对称或部分对称的非恒 模列矢量, 使得该非恒模预编码矩阵能够调整波束的形状, 从而使得天线能 够将功率集中到热点区域, 由此能够有效地实现通信系统的负载平衡, 并提 升通信系统的性能。
另外, 本文中术语 "系统" 和 "网络" 在本文中常被可互换使用。 本文 中术语 "和 /或", 仅仅是一种描述关联对象的关联关系, 表示可以存在三种 关系, 例如, A和 /或 B, 可以表示: 单独存在 A , 同时存在 A和 B, 单独存 在 B这三种情况。另外,本文中字符 "/" ,一般表示前后关联对象是一种 "或" 的关系。
应理解, 在本发明实施例中, "与 A相应的 B"表示 B与 A相关联, 根 据 A可以确定 B。 但还应理解, 根据 A确定 B并不意味着仅仅根据 A确定 B, 还可以根据 A和 /或其它信息确定
本领域普通技术人员可以意识到, 结合本文中所公开的实施例描述的各 示例的单元及算法步骤, 能够以电子硬件、 计算机软件或者二者的结合来实 现, 为了清楚地说明硬件和软件的可互换性, 在上述说明中已经按照功能一 般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执 行, 取决于技术方案的特定应用和设计约束条件。 专业技术人员可以对每个 特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超 出本发明的范围。
所属领域的技术人员可以清楚地了解到, 为了描述的方便和筒洁, 上述 描述的系统、 装置和单元的具体工作过程, 可以参考前述方法实施例中的对 应过程, 在此不再赘述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统、 装置和 方法, 可以通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示 意性的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实际实现时可 以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个 系统, 或一些特征可以忽略, 或不执行。 另外, 所显示或讨论的相互之间的 耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或 通信连接, 也可以是电的, 机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作 为单元显示的部件可以是或者也可以不是物理单元, 即可以位于一个地方, 或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或 者全部单元来实现本发明实施例方案的目的。
另外, 在本发明各个实施例中的各功能单元可以集成在一个处理单元 中, 也可以是各个单元单独物理存在, 也可以是两个或两个以上单元集成在 一个单元中。 上述集成的单元既可以采用硬件的形式实现, 也可以采用软件 功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销 售或使用时, 可以存储在一个计算机可读取存储介质中。 基于这样的理解, 本发明的技术方案本质上或者说对现有技术做出贡献的部分, 或者该技术方 案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在 一个存储介质中, 包括若干指令用以使得一台计算机设备(可以是个人计算 机, 服务器, 或者网络设备等)执行本发明各个实施例所述方法的全部或部 分步骤。 而前述的存储介质包括: U盘、 移动硬盘、 只读存储器(ROM, Read-Only Memory )、 随机存取存者器 ( RAM, Random Access Memory )、 磁碟或者光盘等各种可以存储程序代码的介质。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限 于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易 想到各种等效的修改或替换, 这些修改或替换都应涵盖在本发明的保护范围 之内。 因此, 本发明的保护范围应以权利要求的保护范围为准。

Claims

权利要求
1、 一种确定预编码矩阵指示的方法, 其特征在于, 包括:
接收基站发送的参考信号集;
基于所述参考信号集, 从码本中选择预编码矩阵, 所述码本至少包括一 个非恒模预编码矩阵, 所述非恒模预编码矩阵至少包括一个非恒模列矢量, 所述非恒模列矢量的至少两个元素的幅度值组成具有对称性的数列;
向所述基站发送预编码矩阵指示, 所述预编码矩阵指示相应于所选择的 预编码矩阵。
2、 根据权利要求 1所述的方法, 其特征在于, 所述数列满足以下关系 式:
( M为偶数); 或
Figure imgf000020_0001
≤, ≤ M+i)/2 ( M为奇数 );
[aM ― aM-l -' ·"' - β(Μ+1)/2 其中, Μ为所述数列的长度; ;为所述数列的第 个幅度值, 为自然 数且 1≤ ≤M。
3、 根据权利要求 1所述的方法, 其特征在于, 所述对称性的数列包含 两个对称部分, 每个对称部分为等比数列。
4、 根据权利要求 1所述的方法, 其特征在于, 所述对称性的数列包含 两个对称部分, 每个对称部分为等差数列。
5、 根据权利要求 1至 4中任一项所述的方法, 其特征在于, 所述非恒 模预编码矩阵为对角矩阵与恒模矩阵的乘积, 其中, 所述对角矩阵的对角线 元素由所述非恒模列矢量的各元素的幅度值组成。
6、 一种确定预编码矩阵指示的方法, 其特征在于, 包括:
向用户设备发送参考信号集;
接收所述用户设备发送的预编码矩阵指示, 所述预编码矩阵指示与所述 用户设备基于所述参考信号集从码本中选择的预编码矩阵相应, 其中, 所述 码本至少包括一个非恒模预编码矩阵, 所述非恒模预编码矩阵至少包括一个 非恒模列矢量,所述非恒模列矢量的至少两个元素的幅度值组成具有对称性 的数列。
7、 根据权利要求 6所述的方法, 其特征在于, 所述数列满足以下关系 式:
( Μ为偶数); 或 ( M为奇数);
Figure imgf000021_0001
其中, M为所述数列的长度; β,为所述数列的第 /个幅度值, 为自然 数且 1≤ ≤Μ。
8、 根据权利要求 6所述的方法, 其特征在于, 所述对称性的数列包含 两个对称部分, 每个对称部分为等比数列。
9、 根据权利要求 6所述的方法, 其特征在于, 所述对称性的数列包含 两个对称部分, 每个对称部分为等差数列。
10、 根据权利要求 6至 9中任一项所述的方法, 其特征在于, 所述非恒 模预编码矩阵为对角矩阵与恒模矩阵的乘积, 其中, 所述对角矩阵的对角线 元素由所述非恒模列矢量的各元素的幅度值组成。
11、 一种用户设备, 其特征在于, 包括:
接收模块, 用于接收基站发送的参考信号集;
选择模块, 用于基于所述接收模块接收的所述参考信号集, 从码本中选 择预编码矩阵, 所述码本至少包括一个非恒模预编码矩阵, 所述非恒模预编 码矩阵至少包括一个非恒模列矢量, 所述非恒模列矢量的至少两个元素的幅 度值组成具有对称性的数列;
发送模块, 用于向所述基站发送预编码矩阵指示, 所述预编码矩阵指示 相应于所述选择模块所选择的预编码矩阵。
12、 根据权利要求 11所述的用户设备, 其特征在于, 所述数列满足以 下关系式:
( Μ为偶数); 或
( M为奇数 );
Figure imgf000021_0002
其中, Μ为所述数列的长度; ίϊ,为所述数列的第 个幅度值, 为自然 数且 1≤ ≤Μ。
13、 根据权利要求 11所述的用户设备, 其特征在于, 所述对称性的数 列包含两个对称部分,每个对称部分为等比数列。
14、 根据权利要求 11所述的用户设备, 其特征在于, 所述对称性的数 列包含两个对称部分,每个对称部分为等差数列。
15、 根据权利要求 11至 14中任一项所述的用户设备, 其特征在于, 所 述非恒模预编码矩阵为对角矩阵与恒模矩阵的乘积, 其中, 所述对角矩阵的 对角线元素由所述非恒模列矢量的各元素的幅度值组成。
16、 一种基站, 其特征在于, 包括:
发送模块, 用于向用户设备发送参考信号集;
接收模块, 用于接收所述用户设备发送的预编码矩阵指示, 所述预编码 矩阵指示与所述用户设备基于所述参考信号集从码本中选择的预编码矩阵 相应, 其中, 所述码本至少包括一个非恒模预编码矩阵, 所述非恒模预编码 矩阵至少包括一个非恒模列矢量, 所述非恒模列矢量的至少两个元素的幅度 值组成具有对称性的数列。
17、 根据权利要求 16所述的基站, 其特征在于, 所述数列满足以下关 系式:
Figure imgf000022_0001
其中, M为所述数列的长度; 为所述数列的第 个幅度值, 为自然 数且 1≤ ≤M 。
18、 根据权利要求 16所述的基站, 其特征在于 所述对称性的数列包 含两个对称部分, 每个对称部分为等比数列。
19、 根据权利要求 16所述的基站, 其特征在于, 所述对称性的数列包 含两个对称部分, 每个对称部分为等差数列。
20、 根据权利要求 16至 19中任一项所述的基站, 其特征在于, 所述非 恒模预编码矩阵为对角矩阵与恒模矩阵的乘积, 其中, 所述对角矩阵的对角 线元素由所述非恒模列矢量的各元素的幅度值组成。
PCT/CN2012/078020 2012-07-02 2012-07-02 确定预编码矩阵指示的方法、用户设备和基站 WO2014005257A1 (zh)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CN201280020698.2A CN103782533B (zh) 2012-07-02 2012-07-02 确定预编码矩阵指示的方法、用户设备和基站
PCT/CN2012/078020 WO2014005257A1 (zh) 2012-07-02 2012-07-02 确定预编码矩阵指示的方法、用户设备和基站
EP12880517.3A EP2860897B1 (en) 2012-07-02 2012-07-02 Method for determining precoding matrix indicator, user equipment and base station
EP17189750.7A EP3334077B1 (en) 2012-07-02 2012-07-02 Method, user equipment and base station for determining precoding matrix indicator
US14/588,755 US9209877B2 (en) 2012-07-02 2015-01-02 Method, user equipment and base station for determining precoding matrix indicator
US14/931,284 US9847817B2 (en) 2012-07-02 2015-11-03 Method, user equipment and base station for determining precoding matrix indicator
US15/823,046 US10326506B2 (en) 2012-07-02 2017-11-27 Method, user equipment and base station for determining precoding matrix indicator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/078020 WO2014005257A1 (zh) 2012-07-02 2012-07-02 确定预编码矩阵指示的方法、用户设备和基站

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/588,755 Continuation US9209877B2 (en) 2012-07-02 2015-01-02 Method, user equipment and base station for determining precoding matrix indicator

Publications (1)

Publication Number Publication Date
WO2014005257A1 true WO2014005257A1 (zh) 2014-01-09

Family

ID=49881214

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/078020 WO2014005257A1 (zh) 2012-07-02 2012-07-02 确定预编码矩阵指示的方法、用户设备和基站

Country Status (4)

Country Link
US (3) US9209877B2 (zh)
EP (2) EP2860897B1 (zh)
CN (1) CN103782533B (zh)
WO (1) WO2014005257A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018023221A1 (zh) * 2016-07-30 2018-02-08 华为技术有限公司 一种信道信息传输装置、方法和系统
WO2018058483A1 (zh) * 2016-09-29 2018-04-05 华为技术有限公司 传输信道状态信息的方法和装置
CN109039395A (zh) * 2017-06-12 2018-12-18 上海中兴软件有限责任公司 波束选择方法及装置
WO2020155905A1 (zh) * 2019-02-01 2020-08-06 华为技术有限公司 一种量子通信方法、装置及系统

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5874845B2 (ja) * 2012-05-28 2016-03-02 日本電気株式会社 DLMU−MIMO通信システムにおけるeNodeBとUEとの間の送信キャパシティの最適化に用いられるプリコーダの生成方法
ES2756449T3 (es) 2012-06-14 2020-04-27 Huawei Tech Co Ltd Método, equipo de usuario y nodo evolucionado de estación base para determinar un indicador de matriz de precodificación
BR112015024196B1 (pt) 2013-04-03 2022-09-06 Huawei Technologies Co., Ltd Método para relatar e receber informação de estado de canal, equipamento de usuário e estação base
CN110336597B (zh) 2013-05-10 2020-07-07 华为技术有限公司 确定预编码矩阵指示的方法、用户设备和存储介质
US9392549B2 (en) * 2013-06-11 2016-07-12 Broadcom Corporation Reducing precoder signaling overhead for MIMO communication system
CN108494450B (zh) 2013-08-08 2020-06-16 华为技术有限公司 确定预编码矩阵指示的方法、接收设备和发送设备
EP3142260B1 (en) 2014-05-30 2018-11-28 Huawei Technologies Co. Ltd. Method and device for reporting channel status information (csi), and base station antenna
US10224988B2 (en) 2014-12-31 2019-03-05 Huawei Technologies Co., Ltd. CSI-RS transmission method, network device, and user equipment
CN108023624B (zh) * 2016-11-03 2021-10-01 华为技术有限公司 一种预编码矩阵指示方法、装置和系统
CN110247687B (zh) 2017-09-10 2020-10-16 华为技术有限公司 一种码本子集限制的方法、基站和计算机可读存储介质
WO2019118250A1 (en) * 2017-12-15 2019-06-20 Telefonaktiebolaget L M Ericsson (Publ) Non-constant modulus codebook design
EP3751768A4 (en) 2018-02-14 2021-01-20 Huawei Technologies Co., Ltd. COMMUNICATION PROCESS, COMMUNICATION DEVICE AND SYSTEM
US10952151B2 (en) 2018-04-19 2021-03-16 Samsung Electronics Co., Ltd. Uplink power control for advanced wireless communication systems
CN112236961B (zh) * 2018-05-21 2023-12-01 上海诺基亚贝尔股份有限公司 信道状态信息反馈
US10404339B1 (en) 2018-08-09 2019-09-03 At&T Intellectual Property I, L.P. Precoding matrix indicator determination in wireless communication systems
US11516743B2 (en) 2018-11-13 2022-11-29 Samsung Electronics Co., Ltd. Uplink power scaling for advanced wireless communication systems
US11271626B2 (en) 2018-12-06 2022-03-08 Samsung Electronics Co., Ltd. Full power uplink transmission for advanced wireless communication systems

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102006145A (zh) * 2009-09-02 2011-04-06 华为技术有限公司 一种多输入多输出系统中的预编码方法和装置
CN102130752A (zh) * 2010-01-16 2011-07-20 华为技术有限公司 获取预编码矩阵指示以及预编码矩阵的方法和装置
CN102158315A (zh) * 2010-02-10 2011-08-17 马维尔国际贸易有限公司 使用多级码本的mimo通信系统中的码本自适应
US20120039369A1 (en) * 2010-08-16 2012-02-16 Samsung Electronics Co., Ltd. Codebook for eight transmit antennas and multiple input multiple output communication system using the codebook

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7190734B2 (en) * 2001-05-25 2007-03-13 Regents Of The University Of Minnesota Space-time coded transmissions within a wireless communication network
US7672384B2 (en) * 2004-03-12 2010-03-02 Regents Of The University Of Minnesota Bandwidth and power efficient multicarrier multiple access
PL2615785T3 (pl) * 2007-04-30 2018-01-31 Ericsson Telefon Ab L M Sposób i układ do adaptacji transmisji wieloantenowej
US8107544B2 (en) * 2007-05-16 2012-01-31 Motorola Mobility, Inc. Method and apparatus for feedback in closed loop transmitting
US7629902B2 (en) * 2007-06-08 2009-12-08 Samsung Electronics Co., Ltd. MIMO wireless precoding system robust to power imbalance
KR101749845B1 (ko) * 2008-04-29 2017-06-21 애플 인크. 다중 안테나 빔 형성 셀룰러 네트워크의 성능 향상
US20110243079A1 (en) * 2010-03-18 2011-10-06 Texas Instruments Incorporated Transmission Modes and Signaling for Uplink MIMO Support or Single TB Dual-Layer Transmission in LTE Uplink
EP2702736A4 (en) * 2011-04-29 2015-10-14 Intel Corp SYSTEM AND METHOD FOR CHANNEL CONTROL IN A WIRELESS COMMUNICATION SYSTEM
WO2012151737A1 (zh) * 2011-05-06 2012-11-15 富士通株式会社 用户设备、基站、远端无线头选择方法
EP2761772A4 (en) * 2011-09-30 2015-05-13 Intel Corp MU-MIMO RADIO CONNECTIONS WITH IMPROVED PERFORMANCE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102006145A (zh) * 2009-09-02 2011-04-06 华为技术有限公司 一种多输入多输出系统中的预编码方法和装置
CN102130752A (zh) * 2010-01-16 2011-07-20 华为技术有限公司 获取预编码矩阵指示以及预编码矩阵的方法和装置
CN102158315A (zh) * 2010-02-10 2011-08-17 马维尔国际贸易有限公司 使用多级码本的mimo通信系统中的码本自适应
US20120039369A1 (en) * 2010-08-16 2012-02-16 Samsung Electronics Co., Ltd. Codebook for eight transmit antennas and multiple input multiple output communication system using the codebook

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2860897A4 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018023221A1 (zh) * 2016-07-30 2018-02-08 华为技术有限公司 一种信道信息传输装置、方法和系统
CN109478948A (zh) * 2016-07-30 2019-03-15 华为技术有限公司 一种信道信息传输装置、方法和系统
US10819485B2 (en) 2016-07-30 2020-10-27 Huawei Technologies Co., Ltd. Precoding matrix channel information transmission apparatus and method, and system
CN109478948B (zh) * 2016-07-30 2021-05-04 华为技术有限公司 一种信道信息传输装置、方法和系统
WO2018058483A1 (zh) * 2016-09-29 2018-04-05 华为技术有限公司 传输信道状态信息的方法和装置
US10756801B2 (en) 2016-09-29 2020-08-25 Huawei Technologies Co., Ltd. Method and apparatus for transmitting channel state information
CN109039395A (zh) * 2017-06-12 2018-12-18 上海中兴软件有限责任公司 波束选择方法及装置
CN109039395B (zh) * 2017-06-12 2022-08-05 中兴通讯股份有限公司 波束选择方法及装置
WO2020155905A1 (zh) * 2019-02-01 2020-08-06 华为技术有限公司 一种量子通信方法、装置及系统
US11476950B2 (en) 2019-02-01 2022-10-18 Huawei Technologies Co., Ltd. Quantum communication method, apparatus, and system

Also Published As

Publication number Publication date
EP3334077A1 (en) 2018-06-13
US20180083675A1 (en) 2018-03-22
US9209877B2 (en) 2015-12-08
US10326506B2 (en) 2019-06-18
US9847817B2 (en) 2017-12-19
EP2860897A1 (en) 2015-04-15
US20160056873A1 (en) 2016-02-25
EP3334077B1 (en) 2019-08-28
CN103782533B (zh) 2017-02-22
US20150110215A1 (en) 2015-04-23
CN103782533A (zh) 2014-05-07
EP2860897B1 (en) 2017-11-01
EP2860897A4 (en) 2015-07-22

Similar Documents

Publication Publication Date Title
WO2014005257A1 (zh) 确定预编码矩阵指示的方法、用户设备和基站
CN104620527B (zh) 确定预编码矩阵指示的方法、接收设备和发送设备
WO2017050295A1 (zh) 一种多天线信道测量方法和装置
EP3429257B1 (en) Method for reporting channel state information, user equipment, and base station
WO2018127151A1 (zh) 一种预编码矩阵指示方法、装置和系统
JP2019530285A (ja) 高度csiフィードバックオーバヘッド低減のための構成可能コードブック
EP3602815B1 (en) Adaptive digital precoder codebook configurations for mmwave communication based on hybrid beamforming
WO2015154283A1 (zh) 一种报告信道状态信息的方法、用户设备和基站
WO2014101242A1 (zh) 报告信道状态信息csi的方法、用户设备和基站
WO2014169421A1 (zh) 一种报告信道状态信息的方法、用户设备和基站
EP2643988A1 (en) Multi-layer beamforming with partial channel state information
KR20230034379A (ko) 향상된 nr 타입 ii csi 피드백을 지원하기 위한 시그널링
WO2016183835A1 (zh) 传输信号的方法和设备
WO2015054879A1 (zh) 信道状态信息的测量和反馈方法、终端及基站
CN115943721A (zh) 用于ptrs和dmrs端口关联以用于在多个波束上传输pusch的系统和方法
WO2018094709A1 (zh) 一种确定预编码矩阵的方法、装置及系统
WO2019019055A1 (zh) 传输数据的方法、终端设备和网络设备
US20240178893A1 (en) Channel information feedback method and communication apparatus
WO2023272676A1 (en) Systems and methods for uplink codebook based transmission
EP3461167B1 (en) Csi-rs transmission method, network device, and user equipment
CN117203905A (zh) 为端口选择码本增强配置W1、W2和Wf的方法和装置
JP2018074605A (ja) プリコーディングマトリクス指標を決定する方法、受信装置、および送信装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12880517

Country of ref document: EP

Kind code of ref document: A1

REEP Request for entry into the european phase

Ref document number: 2012880517

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE