WO2018121671A1 - 参考信号的传输方法、发送端和接收端 - Google Patents

参考信号的传输方法、发送端和接收端 Download PDF

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Publication number
WO2018121671A1
WO2018121671A1 PCT/CN2017/119381 CN2017119381W WO2018121671A1 WO 2018121671 A1 WO2018121671 A1 WO 2018121671A1 CN 2017119381 W CN2017119381 W CN 2017119381W WO 2018121671 A1 WO2018121671 A1 WO 2018121671A1
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Prior art keywords
reference signal
phase tracking
antenna
tracking reference
phase
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PCT/CN2017/119381
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English (en)
French (fr)
Inventor
李辉
高秋彬
塔玛拉卡拉盖施
苏昕
陈润华
黄秋萍
李传军
王蒙军
Original Assignee
电信科学技术研究院
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Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Priority to US16/349,014 priority Critical patent/US10862644B2/en
Priority to EP17887625.6A priority patent/EP3565161B1/en
Priority to KR1020197019937A priority patent/KR20190090863A/ko
Priority to JP2019524978A priority patent/JP6992065B2/ja
Publication of WO2018121671A1 publication Critical patent/WO2018121671A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/046—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account
    • H04B7/0473—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account taking constraints in layer or codeword to antenna mapping into account
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0691—Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/0874—Hybrid systems, i.e. switching and combining using subgroups of receive antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0014—Carrier regulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2657—Carrier synchronisation
    • H04L27/266—Fine or fractional frequency offset determination and synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2673—Details of algorithms characterised by synchronisation parameters
    • H04L27/2675—Pilot or known symbols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H04L27/26136—Pilot sequence conveying additional information

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a method for transmitting a reference signal, a transmitting end, and a receiving end.
  • phase noise comes from local oscillators in the transmitter and receiver, which can have an impact on the transmission of multi-carrier signals.
  • the high frequency band for example: above 6GHz
  • the influence of phase noise will be more serious.
  • more high-band resources will be used for data transmission.
  • resources in high frequency bands such as 6 GHz to 100 GHz
  • 6G it is also possible.
  • the present disclosure provides a method for transmitting a reference signal, a transmitting end, and a receiving end, which can reduce the influence of phase noise.
  • An embodiment of the present disclosure provides a method for transmitting a reference signal, including:
  • the transmitting end precodes the data stream of the user data by using the second precoding matrix to obtain D virtual data streams;
  • the transmitting end pre-codes the D virtual data streams by using a first pre-coding matrix, and transmits pre-coded D virtual data streams to the receiving end by using T antenna groups, where each antenna group includes one Or an antenna unit or an antenna port having the same phase noise, T is an integer greater than or equal to 1, and D is an integer greater than or equal to 1;
  • each demodulation reference signal corresponds to one virtual data stream
  • each precoding vector used by the mediation reference signal and the corresponding virtual data stream are in the solution
  • Precoding vectors in the first precoding matrix used on the subcarriers where the reference signal is located are the same, and each demodulation reference signal and the corresponding virtual data stream are transmitted using the same antenna group;
  • each virtual data stream is precoded and transmitted using one or more antenna groups, and one or more antenna groups used by the same virtual data stream have the same phase noise.
  • the remaining antenna groups are all zero.
  • each phase tracking reference signal is precoded and transmitted using one or more antenna groups, and one or more antenna groups used by the same phase tracking reference signal have the same phase noise.
  • each phase tracking reference signal uses a precoding vector corresponding to one or more antenna groups used by the phase tracking reference signal, and the antenna unit or the antenna port in the remaining antenna group corresponds to The weights are all zero.
  • the information of the second precoding matrix is pre-agreed by the sending end and the receiving end, or the method further includes:
  • the transmitting end transmits, to the receiving end, a rule used by the second precoding matrix on a data bandwidth.
  • mapping relationship between the demodulation reference signal and the phase tracking reference signal is pre-agreed by the transmitting end and the receiving end, or the method further includes:
  • the transmitting end transmits a mapping relationship between the demodulation reference signal and the phase tracking reference signal to the receiving end.
  • mapping relationship between the demodulation reference signal and the phase tracking reference signal includes:
  • a phase tracking reference signal corresponds to at least one demodulation reference signal, and the phase tracking reference signal and the demodulation reference signal having the corresponding relationship are transmitted using the same antenna group;
  • a precoding vector used by the phase tracking reference signal is associated with a precoding vector in the first precoding matrix used on a subcarrier where the phase tracking reference signal is located, wherein the phase tracking reference signal corresponds to a virtual
  • the data stream is a virtual data stream corresponding to the mediation reference signal corresponding to the phase reference signal.
  • the precoding vector used by the phase tracking reference signal and the corresponding virtual data stream are used in the first preamble on the subcarrier where the phase tracking reference signal is located.
  • the precoding vectors in the coding matrix are the same;
  • the precoding vector used by the phase tracking reference signal is used by the plurality of virtual data streams in the first precoding matrix used on the subcarrier where the phase tracking reference signal is located
  • the precoding vector is obtained by operation, and the plurality of virtual data streams are virtual data streams corresponding to the plurality of demodulation reference signals.
  • An embodiment of the present disclosure further provides a method for transmitting a reference signal, including:
  • the receiving end receives the data signal transmitted by the transmitting end
  • each receiving antenna unit or antenna port of the receiving end receives D Demodulating a reference signal, wherein D is an integer greater than or equal to 1;
  • each receiving antenna unit or antenna port of the receiving end receives M Phase tracking reference signal, M is an integer greater than or equal to 1;
  • the receiving end receives M phase tracking reference signals based on the antenna unit or the antenna port, and performs phase compensation on the channels estimated by the received D demodulation reference signals to obtain respective a compensated channel estimate of the demodulation reference signal on the symbol of the phase tracking reference signal;
  • the receiving end obtains channel information based on the compensated channel estimation matrix and the acquired second precoding matrix, wherein the compensated channel estimation matrix includes each demodulation reference signal received by each receiving antenna unit or antenna port in a phase tracking reference.
  • the receiving end demodulates the data signal by using the channel information to obtain user data.
  • the receiving end receives M phase tracking reference signals based on the antenna unit or the antenna port, and estimates channels of the received D demodulation reference signals. Phase compensation is performed to obtain a compensation channel estimate of each demodulation reference signal on the symbol of the phase tracking reference signal, including:
  • the receiving end determines a demodulation reference corresponding to each phase tracking reference signal received by the antenna unit or the antenna port according to the mapping relationship between the obtained demodulation reference signal and the phase tracking reference signal. signal;
  • the receiving end compares the channel estimated by each phase tracking reference signal with the channel estimated by the corresponding demodulation reference signal, and obtains phase change information corresponding to each phase tracking reference signal;
  • the receiving end uses phase change information corresponding to each phase tracking reference signal to perform phase noise compensation on the channel estimated by the corresponding demodulation reference signal, and obtains a compensation channel of each demodulation reference signal on the symbol of the phase tracking reference signal. estimate.
  • mapping relationship is pre-agreed by the sending end and the receiving end, or the method further includes:
  • the receiving end receives the mapping relationship transmitted by the sending end.
  • the receiving end obtains channel information based on the compensated channel estimation matrix and the acquired second precoding matrix, including:
  • the receiving end multiplies the compensated channel estimation matrix by the acquired second precoding matrix to obtain channel information.
  • the information of the second precoding matrix is pre-agreed by the sending end and the receiving end, or the method further includes:
  • the receiving end receives a rule used by the second precoding matrix transmitted by the transmitting end on a data bandwidth, and acquires the second precoding matrix based on the rule.
  • the embodiment of the present disclosure further provides a sending end, including:
  • An encoding module configured to precode the data stream of the user data by using the second precoding matrix to obtain D virtual data streams
  • a first transmission module configured to precode the D virtual data streams by using a first precoding matrix, and transmit pre-coded D virtual data streams to the receiving end by using T antenna groups, where each antenna The group includes one or more antenna elements or antenna ports having the same phase noise, T is an integer greater than or equal to 1, and D is an integer greater than or equal to 1;
  • a second transmission module configured to transmit D demodulation reference signals to the receiving end, where each demodulation reference signal corresponds to one virtual data stream, and each precoding vector used by the mediation reference signal and the corresponding virtual data stream Precoding vectors are the same in the first precoding matrix used on the subcarrier where the demodulation reference signal is located, and each demodulation reference signal and the corresponding virtual data stream are transmitted using the same antenna group;
  • a third transmission module configured to transmit M phase tracking reference signals to the receiving end, where the M phase tracking reference signals are used to track phases caused by one or more phase noise sources of the T antenna groups Change, M is an integer greater than or equal to 1.
  • each virtual data stream is precoded and transmitted using one or more antenna groups, and one or more antenna groups used by the same virtual data stream have the same phase noise.
  • the remaining antenna groups are all zero.
  • each phase tracking reference signal is precoded and transmitted using one or more antenna groups, and one or more antenna groups used by the same phase tracking reference signal have the same phase noise.
  • each phase tracking reference signal uses a precoding vector corresponding to one or more antenna groups used by the phase tracking reference signal, and the antenna unit or the antenna port in the remaining antenna group corresponds to The weights are all zero.
  • the information of the second pre-coding matrix is pre-agreed by the sending end and the receiving end, or the sending end further includes:
  • a fourth transmission module configured to transmit information of the second precoding matrix to the receiving end
  • a fifth transmission module configured to transmit, to the receiving end, a rule used by the second precoding matrix on a data bandwidth.
  • mapping relationship between the demodulation reference signal and the phase tracking reference signal is pre-agreed by the sending end and the receiving end, or the sending end further includes:
  • a sixth transmission module configured to transmit, to the receiving end, a mapping relationship between the demodulation reference signal and the phase tracking reference signal.
  • mapping relationship between the demodulation reference signal and the phase tracking reference signal includes:
  • a phase tracking reference signal corresponds to at least one demodulation reference signal, and the phase tracking reference signal and the demodulation reference signal having the corresponding relationship are transmitted using the same antenna group;
  • a precoding vector used by the phase tracking reference signal is associated with a precoding vector in the first precoding matrix used on a subcarrier where the phase tracking reference signal is located, wherein the phase tracking reference signal corresponds to a virtual
  • the data stream is a virtual data stream corresponding to the mediation reference signal corresponding to the phase reference signal.
  • the precoding vector used by the phase tracking reference signal and the corresponding virtual data stream are used in the first preamble on the subcarrier where the phase tracking reference signal is located.
  • the precoding vectors in the coding matrix are the same;
  • the precoding vector used by the phase tracking reference signal is used by the plurality of virtual data streams in the first precoding matrix used on the subcarrier where the phase tracking reference signal is located
  • the precoding vector is obtained by operation, and the plurality of virtual data streams are virtual data streams corresponding to the plurality of demodulation reference signals.
  • the embodiment of the present disclosure further provides a receiving end, including:
  • a first receiving module configured to receive a data signal transmitted by the transmitting end
  • a second receiving module configured to receive a demodulation reference signal transmitted by the transmitting end, and estimate a channel of each demodulated reference signal received, where each receiving antenna unit or antenna port of the receiving end receives To D demodulation reference signals, where D is an integer greater than or equal to 1;
  • a third receiving module configured to receive a phase tracking reference signal transmitted by the transmitting end, and estimate a channel of each phase tracking reference signal received, where each receiving antenna unit or antenna port of the receiving end receives To M phase tracking reference signals, M is an integer greater than or equal to 1;
  • a channel estimation module configured to receive, according to the antenna unit or the antenna port, M phase tracking reference signals for each receiving antenna unit or antenna port, and perform phase compensation on the channel estimated by the received D demodulation reference signals, Obtaining a compensation channel estimate of each demodulation reference signal on a symbol of the phase tracking reference signal;
  • an obtaining module configured to obtain channel information based on the compensated channel estimation matrix and the acquired second precoding matrix, where the compensation channel estimation matrix includes each demodulation reference signal received by each receiving antenna unit or an antenna port in phase tracking a compensation channel estimate on the symbol where the reference signal is located;
  • a demodulation module configured to demodulate the data signal by using the channel information to obtain user data.
  • the channel estimation module includes:
  • a determining unit configured to determine, according to a mapping relationship between the obtained demodulation reference signal and the phase tracking reference signal, a demodulation corresponding to each phase tracking reference signal received by the antenna unit or the antenna port for each receiving antenna unit or antenna port Reference signal
  • a channel estimation unit configured to compare a channel estimated by each phase tracking reference signal with a channel estimated by a corresponding demodulation reference signal, to obtain phase change information corresponding to each phase tracking reference signal
  • the compensation unit is configured to perform phase noise compensation on the channel estimated by the respective demodulation reference signals by using phase change information corresponding to each phase tracking reference signal, and obtain compensation for each demodulation reference signal on the symbol of the phase tracking reference signal Channel estimation.
  • mapping relationship is pre-agreed by the sending end and the receiving end, or the receiving end further includes:
  • a fourth receiving module configured to receive the mapping relationship that is transmitted by the sending end.
  • the acquiring module is configured to multiply the compensation channel estimation matrix by the acquired second precoding matrix to obtain channel information.
  • the information of the second pre-coding matrix is pre-agreed by the sending end and the receiving end, or the receiving end further includes:
  • a fifth receiving module configured to receive information about the second precoding matrix transmitted by the transmitting end
  • a sixth receiving module configured to receive a rule used by the second precoding matrix transmitted by the sending end on a data bandwidth, and acquire the second precoding matrix according to the rule.
  • the transmitting end precodes the data stream of the user data by using the second precoding matrix to obtain D virtual data streams; the transmitting end precodes the D virtual data streams by using the first precoding matrix. Transmitting, by the T antenna groups, the pre-coded D virtual data streams to the receiving end, wherein each antenna group includes one or more antenna units or antenna ports having the same phase noise; the transmitting end is The receiving end transmits D demodulation reference signals, where each demodulation reference signal corresponds to one virtual data stream, and each precoding vector used by the mediation reference signal and the corresponding virtual data stream are on the subcarrier where the demodulation reference signal is located.
  • the precoding vectors in the first precoding matrix used are the same, each demodulation reference signal and corresponding virtual data stream are transmitted using the same antenna group; the transmitting end transmits M phase tracking reference signals to the receiving end And the M phase tracking reference signals are used to track phase changes caused by one or more phase noise sources in the T antenna groups. Since the transmitting end transmits a phase tracking reference signal, the receiving end uses the received phase tracking reference signal for phase compensation, thereby reducing the influence of phase noise.
  • FIG. 1 is a schematic structural diagram of a network according to an embodiment of the present disclosure
  • FIG. 2 is a flowchart of a method for transmitting a reference signal according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of a reference signal subcarrier distribution according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of signal transmission according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of another reference signal subcarrier distribution according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of another signal transmission according to an embodiment of the present disclosure.
  • FIG. 7 is a structural diagram of a transmitting end according to an embodiment of the present disclosure.
  • FIG. 8 is a structural diagram of another transmitting end according to an embodiment of the present disclosure.
  • FIG. 9 is a structural diagram of another transmitting end according to an embodiment of the present disclosure.
  • FIG. 10 is a structural diagram of another transmitting end according to an embodiment of the present disclosure.
  • FIG. 11 is a structural diagram of a receiving end according to an embodiment of the present disclosure.
  • FIG. 12 is a structural diagram of another receiving end according to an embodiment of the present disclosure.
  • FIG. 13 is a structural diagram of another receiving end according to an embodiment of the present disclosure.
  • FIG. 14 is a structural diagram of another receiving end according to an embodiment of the present disclosure.
  • FIG. 15 is a structural diagram of another transmitting end according to an embodiment of the present disclosure.
  • FIG. 16 is a structural diagram of another receiving end according to an embodiment of the present disclosure.
  • FIG. 1 is a schematic diagram of a network structure applicable to an embodiment of the present disclosure.
  • the present invention includes a transmitting end 11 and a receiving end 12 , where the transmitting end 11 can be understood as a device that transmits (or transmits) data.
  • the receiving end 12 can be understood as a device that receives data.
  • the transmitting end 11 is a network side device
  • the receiving end 12 is a user equipment.
  • the sending end 11 may be a user equipment, and when the sending end 11 is a user equipment, receiving The terminal 12 may be a network side device or a user equipment; or when the transmitting end 11 is a network side device, the receiving end 12 may be a user equipment or a network side device.
  • the user equipment may be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), and a mobile internet device (Mobile Internet Device).
  • PDA personal digital assistant
  • a terminal device such as a wearable device (MID) or a wearable device.
  • MID wearable device
  • the specific type of the transmitting end 11 is not limited in the embodiment of the present disclosure.
  • the network side device may be a transmission receiving point (TRP, Transmission). Reception Point), or may be a base station, which may be a macro station, such as an LTE eNB, a 5G NR NB, or the like. Or the network side device may be an access point (AP). It should be noted that the specific type of the network side device is not limited in the embodiment of the present disclosure.
  • an embodiment of the present disclosure provides a method for transmitting a reference signal, as shown in FIG. 2, including the following steps:
  • the transmitting end precodes the data stream of the user data by using the second precoding matrix to obtain D virtual data streams.
  • the transmitting end pre-codes the D virtual data streams by using a first pre-coding matrix, and transmits the pre-coded D virtual data streams to the receiving end by using T antenna groups, where each antenna group includes one Or an antenna unit or an antenna port having the same phase noise, T is an integer greater than or equal to 1, and D is an integer greater than or equal to 1;
  • the transmitting end transmits D demodulation reference signals (DMRSs) to the receiving end, where a precoding vector used by each mediation reference signal and a corresponding virtual data stream are located at the demodulation reference signal.
  • DMRSs D demodulation reference signals
  • the precoding vectors in the first precoding matrix used on the subcarriers are the same, and each demodulation reference signal and the corresponding virtual data stream are transmitted using the same antenna group;
  • the transmitting end transmits, to the receiving end, M Phase Tracking Reference Signals (PTRSs), where the M phase tracking reference signals are used to track one or more phase noises in the T antenna groups.
  • PTRSs Phase Tracking Reference Signals
  • the phase change caused by the source, M is an integer greater than or equal to 1.
  • the user data may be any data that can be transmitted before the sending end and the receiving terminal, for example, uplink data or downlink data.
  • the data stream of the user data is first encoded corresponding to the second precoding matrix to obtain the D data virtual streams.
  • the R data streams of the user equipment are coded corresponding to the second precoding matrix to obtain the D virtual data streams.
  • the user data can be rotated through the second precoding matrix to perform data transmission in a high speed environment, thereby improving transmission performance.
  • the D virtual data streams may be D data streams obtained by precoding the user equipment.
  • the above D may be greater than or equal to the above T.
  • D is less than T, which is not limited.
  • the antenna of the transmitting end is divided into T antenna groups in advance, and each antenna unit or antenna port in each antenna group has the same phase noise, but the phase noise of the antenna unit or the antenna port of different antenna groups may be different.
  • the phase noise of some antenna groups may be the same, which is not limited in this embodiment of the disclosure.
  • each antenna unit or antenna port in the antenna group 1 has the same phase noise, and the antenna unit or the antenna port in the antenna group 2 have the same phase noise, but the phase noise of the antenna unit in the antenna group 1
  • the phase noise of the antenna unit in the antenna group 2 may be different from the phase noise of the antenna unit in the antenna group 3.
  • the transmitting the pre-coded D virtual data streams to the receiving end by using the T antenna groups may be performed by transmitting the D virtual data streams that have passed through the first pre-coding matrix through the T antenna groups.
  • Each virtual data stream can be transmitted through one or more antenna groups.
  • one or more antenna groups used by the same virtual data stream have the same phase noise.
  • the precoding vectors in the first precoding matrix used by the virtual data streams transmitted using different antenna groups may be different, that is, the precoding vectors in the first precoding matrix used by each virtual data stream and the virtual The antenna group used by the data stream corresponds.
  • the transmitting end transmitting the D demodulation reference signals to the receiving end may be: the transmitting end transmits a corresponding demodulation reference signal for each virtual data stream, and the precoding vector used by each mediation reference signal and the corresponding virtual
  • the data stream is identical in the same precoding vector in the first precoding matrix used on the subcarrier where the demodulation reference signal is located, and each demodulation reference signal and the corresponding virtual data stream are transmitted using the same antenna group.
  • the precoding used by the i th demodulation reference signal is the same as the first precoding used by the i th virtual data stream on the subcarrier where the i th demodulation reference signal is located, the i th demodulation reference signal and the ith th
  • the virtual data stream is transmitted using the same antenna group, i being any integer from 1 to D.
  • the mediation reference signal 1 corresponds to the virtual data stream 1
  • the antenna group used by the demodulation reference signal 1 is the same as the antenna group used by the first precoding and virtual data stream 1
  • the precoding used by the demodulation reference signal 1 is used.
  • the M phase tracking reference signals used to track the phase changes caused by the T antenna groups caused by one or more phase noise sources may be that each phase tracking reference signal corresponds to one or more antennas. Groups, each phase tracking reference signal is used to track phase changes caused by one or more phase noise sources in the corresponding antenna group. That is, after the receiving end receives the M phase tracking reference signals, the phase noise of each antenna group can be estimated, wherein the phase noise of the antenna group can be understood as a phase change on different symbols when the signal is transmitted using the antenna group.
  • the phase tracking reference signal is not limited, and the reference signal may be any reference signal capable of tracking the phase change of each symbol transmitted by the antenna unit or the antenna port, which may be related to the demodulation reference.
  • the signal is similar, used when transmitting user data, and precoded for transmission.
  • the transmitting end transmitting the M phase tracking reference signals to the receiving end may be that each phase tracking reference signal is transmitted by using one or more antenna groups, and one or more antenna groups used by the same phase tracking reference signal have the same Phase noise.
  • the receiving end can perform phase compensation on the channel estimated by the demodulation reference signal sent by each antenna group according to the received phase tracking reference signal, and obtain a compensation channel estimation of each demodulation reference signal on the symbol of the phase tracking reference signal. And acquiring channel information based on the compensated channel estimation, and using the channel information to demodulate the received data signal to obtain the user data. This can reduce the impact of phase noise on user data, and even eliminate the impact of phase noise on user data, and ensure accurate data transmission.
  • the order of execution of steps 201 to 204 is not limited.
  • the step 201 is performed first, and then the step 202 is performed. Then, the step 203 is performed, and the step 204 is performed.
  • the embodiment of the present disclosure is not limited thereto.
  • Step 203 is performed first, then step 201 and step 202 are performed, and step 204 can be synchronized with step 202.
  • step 203 and step 204 can be performed simultaneously.
  • step 201 is performed.
  • step 202 The above-mentioned virtual data stream, the mediation reference signal, and the phase tracking reference signal may be transmitted in the same subframe or in the same slot, which is not limited in this embodiment.
  • the implementation process of the receiving end can be as follows:
  • the receiving end receives the data signal transmitted by the transmitting end
  • each receiving antenna unit or antenna port of the receiving end receives D Demodulating a reference signal, wherein D is an integer greater than or equal to 1;
  • each receiving antenna unit or antenna port of the receiving end receives M Phase tracking reference signal, M is an integer greater than or equal to 1;
  • the receiving end receives M phase tracking reference signals based on the antenna unit or the antenna port, and performs phase compensation on the channels estimated by the received D demodulation reference signals to obtain respective a compensated channel estimate of the demodulation reference signal on the symbol of the phase tracking reference signal;
  • the receiving end obtains channel information based on the compensated channel estimation matrix and the acquired second precoding matrix, wherein the compensated channel estimation matrix includes each demodulation reference signal received by each receiving antenna unit or antenna port in a phase tracking reference.
  • the receiving end demodulates the data signal by using the channel information to obtain user data.
  • the data signal may be referred to as a receiving signal at the receiving end, that is, the receiving end receives the received signal received by the receiving end after step 201.
  • each receiving antenna unit or antenna port receives D demodulation references.
  • Signal and M phase tracking reference signals thereby, the channel of each of the received demodulation reference signals can be estimated, and the channel of each received phase tracking reference signal can be estimated.
  • phase tracking reference signals can be received based on the receiving antenna unit or the antenna port, and the channels estimated by the received D demodulation reference signals are phase compensated, and each is obtained.
  • the phase compensation is performed on the channels estimated by the received D demodulation reference signals, and the compensated channel estimation of each demodulation reference signal on the symbol of the phase tracking reference signal is obtained, which may be a channel pair estimated by using the phase tracking reference signal.
  • Corresponding demodulation reference signal estimated channel performs phase noise estimation, and phase compensates the channel estimated by the mediation reference signal based on the estimated phase noise to obtain a demodulation reference signal on the symbol of the corresponding phase tracking reference signal Compensation channel estimation. Since the M phase tracking reference signals are used to track phase changes caused by the T antenna groups by one or more phase noise sources, and each antenna group transmits a demodulation reference signal, then each phase tracking reference The signal will have a corresponding demodulation reference signal, and then the phase estimation of the channel estimated by the corresponding demodulation reference signal by using each phase tracking reference signal is obtained, and each demodulation reference signal is obtained on the symbol of the corresponding phase tracking reference signal. Compensation channel estimation.
  • the channel information may be obtained by using the compensated channel estimation matrix and the acquired second precoding matrix, for example, the compensation channel may be The estimation matrix and the obtained second precoding matrix perform a preset operation to obtain channel information, and the preset operation includes, but is not limited to, multiplying the compensation channel estimation matrix by the acquired second precoding matrix.
  • the channel information can be understood as complete channel information experienced by user data, and the channel information can be represented as a matrix. In this way, the receiving end can use the channel information to demodulate the data signal to obtain user data, so as to reduce the influence of phase noise on user data, and even eliminate the influence of phase noise on user data, and ensure accurate data transmission.
  • the receiving antenna unit or the antenna port does not limit the antenna unit or the antenna port to receive only, and may also perform transmission, but only for the receiving end, which is described in the embodiment of the present disclosure.
  • the corresponding action is received to describe the receiving antenna unit or the wireless port, but is not limited.
  • each virtual data stream is precoded and transmitted using one or more antenna groups, and one or more antenna groups used by the same virtual data stream have the same phase noise.
  • the same virtual data stream can be transmitted by using one or more antenna groups, and the one or more antenna groups have the same phase noise, thereby facilitating phase compensation at the receiving end to further eliminate the influence of phase noise.
  • the first precoding used by each virtual data stream may correspond to the antenna group transmitted by it, for example, the virtual data stream 1 is transmitted through the antenna group 1, and then the first precoding used by the virtual data stream 1 is used.
  • the virtual data stream 2 is transmitted through the antenna group 2, and then the first precoding used by the virtual data stream 2 corresponds to the antenna group 2.
  • the first precoding used by each virtual data stream corresponds to the antenna group that is transmitted respectively, so that the phase noise effect of each virtual data stream is only affected by the phase noise of the corresponding antenna group, and is not affected by other antenna groups.
  • the weights corresponding to the antenna elements or antenna ports in the remaining antenna groups are all zero.
  • the precoding vector in the first precoding matrix used by each virtual data stream may be implemented in addition to the weight corresponding to one or more antenna groups used in the virtual data stream transmission, and the remaining antenna groups are included in the antenna group.
  • the weights corresponding to the antenna elements or antenna ports are all zero. That is, each virtual data stream is precoded in step 202, and the precoding vectors in the first precoding matrix are used, except for the weights corresponding to the antenna groups transmitted by themselves, and the corresponding antenna units or antenna ports.
  • the weights are all zero, and the weight corresponding to the antenna group transmitted by itself in the precoding vector in the first precoding matrix is the weight of each antenna unit or antenna port in the antenna group, and the weight can be received by
  • the end feedback is determined by the transmitting end according to the uplink and downlink reciprocity. In this way, each virtual data stream can only be affected by the phase noise of the antenna group used by itself, and a corresponding phase tracking reference signal is transmitted for each antenna group, so that the receiving end can estimate the demodulated signals. Phase noise, which eliminates the effects of phase noise on user data.
  • each phase tracking reference signal is precoded and transmitted using one or more antenna groups, and one or more antenna groups used by the same phase tracking reference signal have the same phase noise.
  • each phase tracking reference signal can be transmitted using one or more antenna groups, and the one or more antenna groups have the same phase noise, thereby implementing a phase tracking reference signal to track the introduction of a phase noise source.
  • Phase noise is provided to facilitate the receiver to estimate the phase change of each antenna group to further eliminate the influence of phase noise.
  • each phase tracking reference signal uses an antenna element in the precoding vector except for one or more antenna groups used by the phase tracking reference signal. Or the weight corresponding to the antenna port is zero.
  • the precoding vector used by each phase tracking reference signal may be implemented, except for the weight corresponding to one or more antenna groups used for the phase tracking reference signal transmission, and the antenna elements or antennas in the remaining antenna groups.
  • the weights corresponding to the ports are all zero. That is, each of the precoding vectors used in addition to the precoding, except for the antenna group transmitted by itself, the weights corresponding to the remaining antenna units or antenna ports are zero, and the antenna group transmitted by itself in the precoding.
  • the corresponding weight is the weight of each antenna unit or antenna port in the antenna group, and the weight may be determined by the receiving end or determined by the transmitting end according to the uplink and downlink reciprocity.
  • the information of the second pre-coding matrix is pre-agreed by the sending end and the receiving end, or the method further includes:
  • the transmitting end transmits, to the receiving end, a rule that the second precoding matrix is used on a data bandwidth.
  • the transmitting end may notify the receiving end of the second precoding matrix by means of high layer signaling or dynamic control signaling, and may also implement a rule for informing the second precoding matrix to use on the data bandwidth, so as to enable receiving.
  • the terminal obtains the second precoding matrix described above based on the rule, or pre-arranges.
  • the second precoding matrix may be a second precoding matrix used by the transmitting end on all data bandwidths, so that the second precoding matrix notified by the transmitting end to the receiving end, that is, the entire data bandwidth. The second precoding matrix used.
  • the transmitting end when a pre-agreed manner is adopted, can transmit the information of the second precoding matrix to the receiving end and the rule used by the second precoding matrix on the data bandwidth, thereby reducing the transmission. Overhead.
  • the transmitting end sends the information of the second precoding matrix to the receiving end and the rule used by the second precoding matrix on the data bandwidth, so that the second precoding matrix and the second may be implemented.
  • the rules used by the precoding matrix on the data bandwidth are determined by the transmitting end, so that the flexibility of the second precoding matrix can be improved to better adapt to the needs of the service to improve the performance of the service.
  • mapping relationship between the demodulation reference signal and the phase tracking reference signal is pre-agreed by the sending end and the receiving end, or the method further includes:
  • the transmitting end transmits a mapping relationship between the demodulation reference signal and the phase tracking reference signal to the receiving end.
  • the transmitting end may notify the receiving end of the mapping relationship between the phase tracking reference signal PTRS and the DMRS by means of high layer signaling or dynamic control signaling.
  • the mapping relationship may be a mapping relationship between the PTRS port and the DMRS port. Because both the PTRS and the DMRS are transmitted by using the port, the PTRS port and the DMRS port are mapped, and thus the PTRS and the DMRS are also used. There is a mapping relationship.
  • one PTRS can also be understood as one PTRS port
  • one DMRS can also be understood as one DMRS port.
  • the transmitting end when a pre-agreed manner is adopted, the transmitting end can eliminate the above mapping relationship to the receiving end, thereby reducing transmission overhead.
  • the sending end sends the foregoing mapping relationship to the receiving end, so that the mapping relationship can be determined by the sending end, thereby improving the flexibility of the mapping relationship, so as to better adapt to the needs of the service. To improve business performance.
  • the receiving end acquires the mapping relationship, the corresponding phase tracking reference signal corresponding to the mediation reference signal can be accurately determined, and then the corresponding demodulation reference signals are respectively used for the channel pairs estimated by using the phase tracking reference signal.
  • the estimated channel is phase compensated to eliminate the phase noise effects of each demodulated reference signal.
  • the receiving end can determine the demodulation corresponding to each phase tracking reference signal received by the antenna unit or the antenna port according to the mapping relationship between the obtained demodulation reference signal and the phase tracking reference signal. a reference signal; and comparing the channel estimated by each phase tracking reference signal with the channel estimated by the corresponding demodulation reference signal to obtain phase change information corresponding to each phase tracking reference signal; and using each phase tracking reference signal corresponding to each The phase change information performs phase noise compensation on the channels estimated by the respective demodulation reference signals, and obtains a compensation channel estimate of each demodulation reference signal on the symbol of the phase tracking reference signal.
  • an antenna tracking port receives a phase tracking reference signal as an example, and the receiving end can determine the demodulation reference signal corresponding to the received phase tracking reference signal according to the mapping relationship, so that the phase tracking reference signal can be estimated.
  • the channel is compared with the channel estimated by the demodulation reference signal corresponding to the phase tracking reference signal, thereby obtaining phase change information corresponding to the phase tracking reference signal, and the phase change information can be understood as a phase noise estimate.
  • the phase change information may be phase-compensated for the channel estimated by the demodulation reference signal corresponding to the phase tracking reference signal, and the demodulation reference signals are obtained in phase. Tracking the compensation channel estimate on the symbol where the reference signal is located. For example, the phase change information is multiplied by the channel estimated by the demodulation reference signal to obtain the compensated channel estimate on the symbol of the phase tracking reference signal.
  • mapping relationship between the demodulation reference signal and the phase tracking reference signal includes:
  • a phase tracking reference signal corresponds to at least one demodulation reference signal, and the phase tracking reference signal and the demodulation reference signal having the corresponding relationship are transmitted using the same antenna group;
  • a precoding vector used by the phase tracking reference signal is associated with a precoding vector in the first precoding matrix used on a subcarrier where the phase tracking reference signal is located, wherein the phase tracking reference signal corresponds to a virtual
  • the data stream is a virtual data stream corresponding to the mediation reference signal corresponding to the phase reference signal.
  • a phase tracking reference signal may be corresponding to at least one demodulation reference signal, and the phase tracking reference signal and the demodulation reference signal having the corresponding relationship are transmitted by using the same antenna group, so that the receiving end uses the phase tracking reference signal.
  • the estimated channel, phase compensation of the channel estimated by the corresponding demodulation reference signal can make the phase compensation more accurate, because the phase tracking reference signal and the demodulation reference signal having the corresponding relationship are transmitted using the same antenna group.
  • the corresponding virtual data stream can be beneficial to the receiving end based on the phase.
  • the channel information of the tracking reference signal is demodulated to demodulate the data signal received by the receiving end to further eliminate the influence of phase noise on the user data.
  • the precoding vector used by the phase tracking reference signal and the corresponding virtual data stream are used in the first preamble on the subcarrier where the phase tracking reference signal is located.
  • the precoding vectors in the coding matrix are the same;
  • the precoding vector used by the phase tracking reference signal is used by the plurality of virtual data streams in the first precoding matrix used on the subcarrier where the phase tracking reference signal is located
  • the precoding vector is obtained by operation, and the plurality of virtual data streams are virtual data streams corresponding to the plurality of demodulation reference signals.
  • the precoding vector used by the phase tracking reference signal and the corresponding precoding matrix used by the corresponding virtual data stream on the subcarrier where the phase tracking reference signal is located The precoding vectors are the same, so that the phase tracking reference signal and the corresponding virtual data stream experience the same channel characteristics, which is beneficial for the receiving end to demodulate the data signal received by the receiving end based on the channel information estimated by the phase tracking reference signal to further eliminate the phase.
  • the effect of noise on user data is beneficial for the receiving end to demodulate the data signal received by the receiving end based on the channel information estimated by the phase tracking reference signal to further eliminate the phase.
  • the foregoing operation may be performed by performing a preset operation on the first pre-coding used by the plurality of virtual data streams on the sub-carriers on which the phase tracking reference signal is located, for example, adding, etc., which is not limited in this embodiment.
  • the first N1 antenna elements or antenna ports in the antenna array of the transmitting end have the same phase noise and are grouped into one group, and the rear N-N1 antenna elements or antenna ports have the same phase noise.
  • T 2
  • M 2 PTRS ports are required.
  • the receiving end uses 2 antennas or antenna ports for reception.
  • the DMRS is located in the third OFDM symbol and contains two ports, which are frequency division multiplexed within the symbol.
  • Each PTRS reference signal occupies one subcarrier (PTRS port 1 is configured on the 5th subcarrier, PTRS port 2 is configured on the 4th subcarrier), and is continuously transmitted on the 4th to 14th symbols.
  • the first 1-2 OFDM signals are control channels, and the rest are user data.
  • Sending side (for example: base station side):
  • the base station side configures, on the kth subcarrier in the user data bandwidth, a second precoding matrix corresponding to an index of the mod(k, S) index in the second precoding matrix set, where mod is a modulo operation.
  • This second precoding matrix can be selected by the base station in a predefined set of precoding matrices.
  • the virtualized first data stream is transmitted on the first N1 antenna elements or antenna ports of the transmitting end, and the virtualized second data stream is transmitted on the rear N-N1 antenna elements or antenna ports of the transmitting end.
  • the first precoding matrix used by the two virtualized data streams at this time is expressed as:
  • a column vector of N 1 ⁇ 1 corresponding to the weight corresponding to the first N1 antenna elements or antenna ports in the precoding used by the first virtualized data stream. It is a column vector of (NN 1 ) ⁇ 1, which corresponds to the weight corresponding to the N-N1 antenna elements or antenna ports in the precoding used by the second virtualized data stream.
  • DMRS1 on subcarrier d1 it uses the same precoding as the first virtual data stream on this subcarrier
  • DMRS2 on subcarrier d2 it uses the same precoding as the second virtual data stream on this subcarrier
  • PTRS port 1 is used Precoding
  • PTRS port 2 use Precoded.
  • 4 shows a schematic diagram of the transmission.
  • the base station side maps PTRS1 to DMRS1, and the information that PTRS2 maps to DMRS2 informs the terminal through high layer signaling or dynamic control signaling. At the same time, the base station side informs the terminal through high layer signaling or dynamic control signaling that the first data stream is mapped to the DMRS port 1 and the second data stream is mapped to the DMRS port 2.
  • the base station side informs the terminal of the index in the second precoding matrix set by the second precoding matrix used on each subcarrier configured by the base station side through high layer signaling.
  • the receiving end (for example, the terminal side):
  • the data signal received on the kth subcarrier of the lth symbol is represented as
  • the channel H k,l and the precoding w k,l remain unchanged in one time unit (subframe).
  • N1 elements On the diagonal of the phase noise matrix of the transmitter, There are N1 elements, The elements are N-N1.
  • the receiving end receives the DMRS reference signal at the third OFDM symbol.
  • the first receiving antenna unit or antenna port it can estimate the synthesized channel from DMRS port 1.
  • the synthesized channel is estimated by DMRS port 2.
  • the receiving end receives the 2-port PTRS from the 4th OFDM symbol and estimates it using PTRS port 1. Estimated using PTRS port 2 l ⁇ 4.
  • the receiving end receives the information that the PTRS1-2 that is sent by the transmitting end and is respectively mapped with the DMRS1-2 by signaling. According to this information, the channel estimation result using PTRS1 is divided by the channel estimation result of DMRS1, and the first symbol of the first receiving antenna or the antenna port is compared with the first group of antenna elements of the transmitting end of the third symbol or The phase change experienced by the antenna port is expressed as
  • the channel estimation on the kth subcarrier of the first symbol on the first receiving antenna or the antenna port can be obtained.
  • a channel estimate on the kth subcarrier of the first symbol on the second receive antenna or antenna port can be derived.
  • the second precoding matrix used on the kth subcarrier in the second precoding matrix set determining, according to the second precoding matrix index notified by the transmitting end, the second precoding matrix used on the kth subcarrier in the second precoding matrix set. Multiplying the estimated channel matrix on all of the above antennas with the determined second precoding matrix, the complete channel information experienced by the user data can be obtained, expressed as
  • User data for each stream can be demodulated based on the complete channel information estimated above.
  • Other subcarriers can be obtained in the same way, and will not be described again.
  • the first N1 antenna elements or antenna ports in the antenna array of the transmitting end have the same phase noise and are grouped into one group, and the rear N-N1 antenna elements or antenna ports have the same phase noise.
  • T 2
  • M 2 PTRS ports are required.
  • the subframe configuration of the reference signal is as shown in FIG. 5.
  • the DMRS is located in the third OFDM symbol, and includes 4 ports, which are frequency division multiplexed in the symbol.
  • Each PTRS reference signal occupies one subcarrier (PTRS port 1 is configured on the 5th subcarrier, PTRS port 2 is configured on the 4th subcarrier), and is continuously transmitted on the 4th to 14th symbols.
  • the first 1-2 OFDM signals are control channels, and the rest are user data.
  • the second precoding matrix set is known to the base station side and the receiving side.
  • the base station side and the terminal side pre-arrange that the index in the second precoding matrix set is the second precoding matrix corresponding to the index value of mod(k, S) on the kth subcarrier within the user data bandwidth, where mod For the modulo operation.
  • the virtualized first data stream and the virtualized second data stream are N-N1 after the transmitting end Transmission on the antenna unit or antenna port.
  • the first precoding matrix used by the four virtualized data streams is represented as
  • N 1 ⁇ 1 which corresponds to the weight corresponding to the first N1 antenna elements or antenna ports in the precoding used by the first and second virtual data streams.
  • N 1 ⁇ 1 corresponds to the weight corresponding to the N-N1 antenna elements or antenna ports in the precoding used by the third and fourth virtual data streams.
  • DMRS1 on subcarrier d1 it uses the same precoding as the first virtual data stream on this subcarrier
  • DMRS2 on subcarrier d2 it uses the same precoding as the second virtual data stream on this subcarrier
  • Both DMRS port 3 and DMRS port 4 are transmitted on the rear N-N1 antenna elements or antenna ports of the transmitting end.
  • Two PTRS ports are used to estimate the phase noise of the two parts. Where PTRS port 1 is used Precoding, PTRS port 2 use Precoded. Among them, Figure 6 shows a schematic diagram of the transmission.
  • the base station side maps PTRS1 to DMRS1 and DMRS2, and the information that PTRS2 maps to DMRS3 and DMRS4 informs the terminal through high layer signaling or dynamic control signaling.
  • the receiving end (for example, the terminal side):
  • the data signal received at the kth subcarrier of the 1st symbol is represented as
  • the channel H k,l and the precoding w k,l remain unchanged in one time unit (subframe).
  • N1 elements On the diagonal of the phase noise matrix of the transmitter, There are N1 elements, The elements are N-N1.
  • the receiving end receives the DMRS reference signal at the third OFDM symbol.
  • the synthesized channel is estimated by DMRS port 1.
  • Estimated by DMRS port 2 Estimated by DMRS port 3
  • the receiving end receives the 2-port PTRS from the 4th OFDM symbol and estimates it using PTRS port 1. Estimated using PTRS port 2
  • the receiving end receives information that the transmitting end signals PTRS1 to be mapped to DMRS1 and DMRS2. According to this information, the channel estimation result using PTRS1 is divided by the sum of the channel estimation results of DMRS1 and DMRS2, and the first symbol on the second receiving antenna or antenna port is obtained first with respect to the transmitting end of the third symbol.
  • the phase change experienced by the group antenna unit or antenna port is expressed as
  • channel estimates on the kth subcarrier of the first symbol on the first, third and fourth receive antennas or antenna ports can be derived.
  • the second precoding matrix used on the subcarrier k can be determined as the precoding matrix corresponding to the index mod(k, S).
  • the channel matrix estimated on all the antennas described above is multiplied by the determined second precoding matrix, and the complete channel information experienced by the user data on the subcarrier k can be obtained.
  • User data for each stream can be demodulated based on the complete channel information estimated above.
  • Other subcarriers can be obtained in the same way, and will not be described again.
  • the transmitting end precodes the data stream of the user data by using the second precoding matrix to obtain D virtual data streams; the transmitting end precodes the D virtual data streams by using the first precoding matrix. And transmitting, by the T antenna groups, the pre-coded D virtual data streams to the receiving end, wherein each antenna group includes one or more antenna units or antenna ports having the same phase noise; the transmitting end is to receive the Transmitting D demodulation reference signals, wherein each demodulation reference signal corresponds to one virtual data stream, and each precoding vector used by the reconciliation reference signal and the corresponding virtual data stream are used on the subcarrier where the demodulation reference signal is located
  • the precoding vectors in the first precoding matrix are the same, each demodulation reference signal and corresponding virtual data stream are transmitted using the same antenna group; the transmitting end transmits M phase tracking reference signals to the receiving end And the M phase tracking reference signals are used to track phase changes caused by one or more phase noise sources in the T antenna groups. Since the transmitting end transmits a phase
  • an embodiment of the present disclosure further provides a method for transmitting a reference signal, as shown in FIG. 7, including the following steps:
  • the receiving end receives the data signal transmitted by the sending end.
  • the receiving end receives the demodulation reference signal transmitted by the sending end, and estimates a channel of each demodulated reference signal received, where each receiving antenna unit or antenna port receives D Demodulating a reference signal, wherein D is an integer greater than or equal to 1;
  • the receiving end receives the phase tracking reference signal transmitted by the transmitting end, and estimates a channel of each phase tracking reference signal received, where each receiving antenna unit or antenna port receives M Phase tracking reference signal, M is an integer greater than or equal to 1;
  • the receiving end receives M phase tracking reference signals based on the antenna unit or the antenna port, and performs phase compensation on the channel estimated by the received D demodulation reference signals. Obtaining a compensation channel estimate of each demodulation reference signal on a symbol of the phase tracking reference signal;
  • the receiving end obtains channel information based on the compensated channel estimation matrix and the acquired second precoding matrix, where the compensated channel estimation matrix includes each demodulation reference signal received by each receiving antenna unit or the antenna port in a phase tracking reference.
  • the receiving end demodulates the data signal by using the channel information to obtain user data.
  • step 704 a corresponding operation is performed for each antenna unit or the antenna port, and the description of each antenna unit or the antenna end may be specifically referred to the description of the embodiment shown in FIG. 2, and details are not described herein. The same benefits can be achieved.
  • the order of execution of steps 701 to 703 is not limited.
  • the receiving end receives M phase tracking reference signals based on the antenna unit or the antenna port, and performs phase noise estimation on the received D demodulation reference signals. And performing compensation to obtain a compensation channel estimation of each demodulation reference signal on the symbol of the phase tracking reference signal, including:
  • the receiving end determines a demodulation reference corresponding to each phase tracking reference signal received by the antenna unit or the antenna port according to the mapping relationship between the obtained demodulation reference signal and the phase tracking reference signal. signal;
  • the receiving end compares the channel estimated by each phase tracking reference signal with the channel estimated by the corresponding demodulation reference signal, and obtains phase change information corresponding to each phase tracking reference signal;
  • the receiving end uses phase change information corresponding to each phase tracking reference signal to perform phase noise compensation on the channel estimated by the corresponding demodulation reference signal, and obtains a compensation channel of each demodulation reference signal on the symbol of the phase tracking reference signal. estimate.
  • mapping relationship is pre-agreed by the sending end and the receiving end, or the method further includes:
  • the receiving end receives the mapping relationship transmitted by the sending end.
  • the receiving end obtains channel information based on the compensated channel estimation matrix and the acquired second precoding matrix, including:
  • the receiving end multiplies the compensated channel estimation matrix by the acquired second precoding matrix to obtain channel information.
  • the information of the second precoding matrix is pre-agreed by the sending end and the receiving end, or the method further includes:
  • the receiving end receives a rule used by the second precoding matrix transmitted by the transmitting end on a data bandwidth, and acquires the second precoding matrix based on the rule.
  • the present embodiment is an implementation manner corresponding to the receiving end in the embodiment shown in FIG. 2.
  • the effect of reducing phase noise can also be achieved. .
  • an embodiment of the present disclosure provides a sending end, as shown in FIG. 8, a sending end 800, including:
  • the encoding module 801 is configured to precode the data stream of the user data by using the second precoding matrix to obtain D virtual data streams;
  • the first transmission module 802 is configured to precode the D virtual data streams by using a first precoding matrix, and transmit the precoded D virtual data streams to the receiving end by using T antenna groups, where each The antenna group includes one or more antenna units or antenna ports having the same phase noise, T is an integer greater than or equal to 1, and D is an integer greater than or equal to 1;
  • a second transmission module 803 configured to transmit D demodulation reference signals to the receiving end, where each demodulation reference signal corresponds to one virtual data stream, and each precoding vector used by the mediation reference signal and corresponding virtual data
  • the precoding vectors in the first precoding matrix used on the subcarriers where the demodulation reference signal is located are the same, and each demodulation reference signal and the corresponding virtual data stream are transmitted using the same antenna group;
  • a third transmission module 804 configured to transmit M phase tracking reference signals to the receiving end, where the M phase tracking reference signals are used to track one or more phase noise sources in the T antenna groups Phase change, M is an integer greater than or equal to 1.
  • each virtual data stream is precoded and transmitted using one or more antenna groups, and one or more antenna groups used by the same virtual data stream have the same phase noise.
  • the remaining antenna groups are all zero.
  • each phase tracking reference signal uses a precoding vector corresponding to one or more antenna groups used by the phase tracking reference signal, and the antenna unit or the antenna port in the remaining antenna group corresponds to The weights are all zero.
  • each phase tracking reference signal uses a precoding corresponding to a weight corresponding to one or more antenna groups used by the phase tracking reference signal, and corresponding to an antenna unit or an antenna port in the remaining antenna group.
  • the weights are all zero.
  • the mapping relationship between the demodulation reference signal and the phase tracking reference signal is pre-agreed by the sending end and the receiving end, or as shown in FIG. 9, the sending end 800 further includes:
  • a fourth transmission module 805, configured to transmit information of the second precoding matrix to the receiving end;
  • the fifth transmission module 806 is configured to transmit, to the receiving end, a rule that the second precoding matrix is used on a data bandwidth.
  • the sending end 800 further includes:
  • a sixth transmission module 807 configured to transmit, to the receiving end, a mapping relationship between the demodulation reference signal and the phase tracking reference signal;
  • the mapping relationship between the demodulation reference signal and the phase tracking reference signal is pre-agreed by the transmitting end and the receiving end.
  • mapping relationship between the demodulation reference signal and the phase tracking reference signal includes:
  • a phase tracking reference signal corresponds to at least one demodulation reference signal, and the phase tracking reference signal and the demodulation reference signal having the corresponding relationship are transmitted using the same antenna group;
  • a precoding vector used by the phase tracking reference signal is associated with a precoding vector in the first precoding matrix used on a subcarrier where the phase tracking reference signal is located, wherein the phase tracking reference signal corresponds to a virtual
  • the data stream is a virtual data stream corresponding to the mediation reference signal corresponding to the phase reference signal.
  • the precoding vector used by the phase tracking reference signal and the corresponding virtual data stream are used in the first preamble on the subcarrier where the phase tracking reference signal is located.
  • the precoding vectors in the coding matrix are the same;
  • the precoding vector used by the phase tracking reference signal is used by the plurality of virtual data streams in the first precoding matrix used on the subcarrier where the phase tracking reference signal is located
  • the precoding vector is obtained by operation, and the plurality of virtual data streams are virtual data streams corresponding to the plurality of demodulation reference signals.
  • the foregoing sending end 800 may be the sending end of any embodiment of the method embodiment in the embodiment of the present disclosure, and any implementation manner of the sending end in the method embodiment of the disclosure may be implemented by the present embodiment.
  • the foregoing sending end 800 is implemented, and the same beneficial effects are achieved, and details are not described herein again.
  • the receiving end 1100 includes:
  • the first receiving module 1101 is configured to receive a data signal transmitted by the transmitting end;
  • the second receiving module 1102 is configured to receive a demodulation reference signal transmitted by the transmitting end, and estimate a channel of each demodulated reference signal received, where each receiving antenna unit or antenna port of the receiving end Receiving D demodulation reference signals, where D is an integer greater than or equal to 1;
  • a third receiving module 1103, configured to receive a phase tracking reference signal transmitted by the transmitting end, and estimate a channel of each phase tracking reference signal received, where each receiving antenna unit or antenna port of the receiving end Receiving M phase tracking reference signals, M being an integer greater than or equal to 1;
  • the channel estimation module 1104 is configured to receive, according to the antenna unit or the antenna port, M phase tracking reference signals for each receiving antenna unit or antenna port, and perform phase compensation on the channel estimated by the received D demodulation reference signals. Obtaining a compensation channel estimate of each demodulation reference signal on a symbol of the phase tracking reference signal;
  • the obtaining module 1105 is configured to obtain channel information based on the compensated channel estimation matrix and the acquired second precoding matrix, where the compensation channel estimation matrix includes each demodulation reference signal received by each receiving antenna unit or the antenna port in phase Tracking the compensation channel estimate on the symbol where the reference signal is located;
  • the demodulation module 1106 is configured to demodulate the data signal by using the channel information to obtain user data.
  • the channel estimation module 1104 includes:
  • the determining unit 11041 is configured to determine, according to the mapping relationship between the acquired demodulation reference signal and the phase tracking reference signal, a solution corresponding to each phase tracking reference signal received by the antenna unit or the antenna port, for each receiving antenna unit or antenna port. Adjust the reference signal;
  • the channel estimation unit 11042 is configured to compare the channel estimated by each phase tracking reference signal with the channel estimated by the corresponding demodulation reference signal, to obtain phase change information corresponding to each phase tracking reference signal;
  • the compensation unit 11043 is configured to perform phase noise compensation on the channel estimated by the respective demodulation reference signals by using the phase change information corresponding to each phase tracking reference signal, and obtain the demodulation reference signals on the symbol of the phase tracking reference signal. Compensation channel estimation.
  • mapping relationship is pre-agreed by the sending end and the receiving end, or the receiving end 1100 further includes:
  • the fourth receiving module 1107 is configured to receive the mapping relationship that is transmitted by the sending end.
  • the obtaining module 1105 is configured to multiply the compensation channel estimation matrix by the acquired second precoding matrix to obtain channel information.
  • the information of the second pre-coding matrix is pre-agreed by the sending end and the receiving end, or the receiving end 1100 further includes:
  • a fifth receiving module 1108, configured to receive information about the second precoding matrix transmitted by the transmitting end;
  • the sixth receiving module 1109 is configured to receive a rule that the second precoding matrix transmitted by the sending end uses on a data bandwidth, and acquire the second precoding matrix according to the rule.
  • the receiving end 1100 may be the receiving end of any embodiment of the method embodiment in the embodiment of the disclosure, and any implementation manner of the receiving end in the method embodiment of the disclosure may be implemented by the present embodiment.
  • the above-mentioned receiving end 1100 is implemented in the example, and the same beneficial effects are achieved, and details are not described herein again.
  • an embodiment of the present disclosure provides another structure of a transmitting end, where the transmitting end includes: a processor 1500, a transceiver 1510, a memory 1520, a user interface 1530, and a bus interface, where:
  • the processor 1500 is configured to read a program in the memory 1520 and perform the following process:
  • each antenna group includes one or more An antenna unit or an antenna port having the same phase noise, T is an integer greater than or equal to 1, and D is an integer greater than or equal to 1;
  • each demodulation reference signal corresponds to one virtual data stream
  • each precoding vector used by the reconciliation reference signal and the corresponding virtual data stream are located at the demodulation reference signal
  • the precoding vectors in the first precoding matrix used on the subcarriers are the same, and each demodulation reference signal and the corresponding virtual data stream are transmitted using the same antenna group;
  • M phase tracking reference signals Transmitting, to the receiving end, M phase tracking reference signals, wherein the M phase tracking reference signals are used to track phase changes caused by one or more phase noise sources in the T antenna groups, where M is greater than or equal to An integer of 1.
  • the transceiver 1510 is configured to receive and transmit data under the control of the processor 1500, and the transceiver 1510 includes the T antenna groups.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1500 and various circuits of memory represented by memory 1520.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • the transceiver 1510 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 1530 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1500 is responsible for managing the bus architecture and general processing, and the memory 1520 can store data used by the processor 1500 in performing operations.
  • each virtual data stream is precoded and transmitted using one or more antenna groups, and one or more antenna groups used by the same virtual data stream have the same phase noise.
  • the remaining antenna groups are all zero.
  • each phase tracking reference signal is precoded and transmitted using one or more antenna groups, and one or more antenna groups used by the same phase tracking reference signal have the same phase noise.
  • each phase tracking reference signal uses a precoding vector corresponding to one or more antenna groups used by the phase tracking reference signal, and the antenna unit or the antenna port in the remaining antenna group corresponds to The weights are all zero.
  • the information of the second precoding matrix is pre-agreed by the sending end and the receiving end, or the processor 1500 is further configured to:
  • the rules used by the second precoding matrix on the data bandwidth are transmitted by the transceiver 1510 to the receiving end.
  • mapping relationship between the demodulation reference signal and the phase tracking reference signal is pre-agreed by the transmitting end and the receiving end, or the processor 1500 is further configured to:
  • the mapping relationship between the demodulation reference signal and the phase tracking reference signal is transmitted to the receiving end by the transceiver 1510.
  • mapping relationship between the demodulation reference signal and the phase tracking reference signal includes:
  • a phase tracking reference signal corresponds to at least one demodulation reference signal, and the phase tracking reference signal and the demodulation reference signal having the corresponding relationship are transmitted using the same antenna group;
  • a precoding vector used by the phase tracking reference signal is associated with a precoding vector in the first precoding matrix used on a subcarrier where the phase tracking reference signal is located, wherein the phase tracking reference signal corresponds to a virtual
  • the data stream is a virtual data stream corresponding to the mediation reference signal corresponding to the phase reference signal.
  • the precoding vector used by the phase tracking reference signal and the corresponding virtual data stream are used in the first preamble on the subcarrier where the phase tracking reference signal is located.
  • the precoding vectors in the coding matrix are the same;
  • the precoding vector used by the phase tracking reference signal is used by the plurality of virtual data streams in the first precoding matrix used on the subcarrier where the phase tracking reference signal is located
  • the precoding vector is obtained by operation, and the plurality of virtual data streams are virtual data streams corresponding to the plurality of demodulation reference signals.
  • the foregoing sending end may be the sending end of any embodiment of the method embodiment in the embodiment of the present disclosure, and any implementation manner of the sending end in the method embodiment of the present disclosure may be used in this embodiment.
  • the above-mentioned transmitting end is implemented, and the same beneficial effects are achieved, and details are not described herein again.
  • FIG. 16 there is shown a structure of a receiving end, the receiving end comprising: a processor 1600, a transceiver 1610, a memory 1620, a user interface 2160, and a bus interface, wherein:
  • the processor 1600 is configured to read a program in the memory 1620 and perform the following process:
  • each receiving antenna unit or antenna port receives D demodulation reference signals Where D is an integer greater than or equal to 1;
  • each receiving antenna unit or antenna port receives M phase tracking reference signals , M is an integer greater than or equal to 1;
  • phase tracking reference signals For each receiving antenna unit or antenna port, based on the antenna unit or the antenna port, M phase tracking reference signals are received, and the channels estimated by the received D demodulation reference signals are phase-compensated to obtain respective demodulation reference signals. a compensation channel estimate on the symbol of the phase tracking reference signal;
  • the compensation channel estimation matrix includes each demodulation reference signal received by each receiving antenna unit or antenna port on a symbol of a phase tracking reference signal Compensation channel estimate;
  • the data signal is demodulated using the channel information to obtain user data.
  • the transceiver 1610 is configured to receive and transmit data under the control of the processor 1600, and the transceiver 1610 includes the antenna unit or the antenna port.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1600 and various circuits of memory represented by memory 1620.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 1610 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 2160 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1600 is responsible for managing the bus architecture and general processing, and the memory 1620 can store data used by the processor 1600 in performing operations.
  • each receiving antenna unit or antenna port receiving M phase tracking reference signals based on the antenna unit or the antenna port, performing phase compensation on the channel estimated by the received D demodulation reference signals, Obtaining a compensation channel estimate for each demodulation reference signal on the symbol of the phase tracking reference signal, including:
  • phase change information corresponding to each phase-tracking reference signal is used to perform phase noise compensation on the channel estimated by the corresponding demodulation reference signal, and the compensated channel estimate of each demodulation reference signal on the symbol of the phase tracking reference signal is obtained.
  • mapping relationship is pre-agreed by the sending end and the receiving end, or the processor 1600 is further configured to:
  • the mapping relationship transmitted by the transmitting end is received by the transceiver 1610.
  • the obtaining the channel information by using the compensated channel estimation matrix and the acquired second precoding matrix includes:
  • the information of the second precoding matrix is pre-agreed by the sending end and the receiving end, or the processor 1600 is further configured to:
  • the receiving end may be the receiving end of any embodiment of the method embodiment in the embodiment of the disclosure, and any implementation manner of the receiving end in the method embodiment of the disclosure may be used in this embodiment.
  • the above-mentioned receiving end is implemented, and the same beneficial effects are achieved, and details are not described herein again.
  • the disclosed method and apparatus may be implemented in other manners.
  • 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, and may be in an electrical, mechanical or other form.
  • each functional unit in various embodiments of the present disclosure may be integrated into one processing unit, or each unit may be physically included 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 hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform part of the steps of the transceiving method of the various embodiments of the present disclosure.
  • the foregoing storage medium includes: a U disk, a mobile 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.

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Abstract

本公开提供一种参考信号的传输方法、发送端和接收端，该方法可包括：发送端使用第二预编码矩阵对用户数据的数据流进行预编码，得到D个虚拟数据流；发送端使用第一预编码矩阵对所述D个虚拟数据流进行预编码，并通过T个天线组向接收端传输使用第一预编码进行预编码后的D个虚拟数据流，其中，每个天线组包括一个或者多个具有相同相位噪声的天线单元或者天线端口；所述发送端向所述接收端传输D个解调参考信号；所述发送端向所述接收端传输M个相位跟踪参考信号，所述M个相位跟踪参考信号用于跟踪所述T个天线组中由一个或多个相位噪声源所引起的相位变化。

Description

参考信号的传输方法、发送端和接收端
相关申请的交叉引用
本申请主张在2016年12月28日在中国提交的中国专利申请号No.201611236137.2的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，尤其涉及一种参考信号的传输方法、发送端和接收端。
背景技术
通信系统的信号在传输过程往往会存在相位噪声，其中，相位噪声来自于发射机和接收机中的本地振荡器，其对于多载波信号的传输将产生影响。且在高频段(例如：6GHz以上)相位噪声的影响将更加严重。然而，在未来的通信系统中会使用更多高频段的资源进行数据传输，例如：在未来的5G会使用高频段(如6GHz至100GHz)的资源进行数据通信，且在未来的6G同样可能会使用高频段的资源进行数据通信。由于相位噪声的影响在高频段的影响更加严重，可见，如何降低相位噪声的影响是当前急需要解决的技术问题。
发明内容
本公开提供了一种参考信号的传输方法、发送端和接收端，可以降低相位噪声的影响。
本公开实施例提供一种参考信号的传输方法，包括：
发送端使用第二预编码矩阵对用户数据的数据流进行预编码，得到D个虚拟数据流；
所述发送端使用第一预编码矩阵对所述D个虚拟数据流进行预编码，并 通过T个天线组向接收端传输预编码后的D个虚拟数据流，其中，每个天线组包括一个或者多个具有相同相位噪声的天线单元或者天线端口，T为大于或者等于1的整数，D为大于或者等于1的整数；
所述发送端向所述接收端传输D个解调参考信号，其中，每个解调参考信号对应一个虚拟数据流，每个调解参考信号使用的预编码向量与对应的虚拟数据流在该解调参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相同，每个解调参考信号和对应的虚拟数据流使用相同的天线组传输；
所述发送端向所述接收端传输M个相位跟踪参考信号，所述M个相位跟踪参考信号用于跟踪所述T个天线组中由一个或多个相位噪声源所引起的相位变化，M为大于或者等于1的整数。
可选的，每个虚拟数据流经过预编码后使用一个或者多个天线组传输，且同一虚拟数据流使用的一个或者多个天线组具有相同的相位噪声。
可选的，每个虚拟数据流使用的所述第一预编码矩阵中的预编码向量中除该虚拟数据流使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
可选的，每个相位跟踪参考信号经过预编码后使用一个或多个天线组传输，且同一相位跟踪参考信号使用的一个或者多个天线组具有相同的相位噪声。
可选的，每个相位跟踪参考信号使用的预编码向量中除该相位跟踪参考信号使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
可选的，所述第二预编码矩阵的信息由所述发送端与所述接收端预先约定，或者所述方法还包括：
所述发送端向所述接收端传输所述第二预编码矩阵的信息；或者
所述发送端向所述接收端传输所述第二预编码矩阵在数据带宽上使用的规则。
可选的，解调参考信号与相位跟踪参考信号的映射关系由所述发送端与所 述接收端预先约定，或者所述方法还包括：
所述发送端向所述接收端传输解调参考信号与相位跟踪参考信号的映射关系。
可选的，所述解调参考信号与相位跟踪参考信号的映射关系，包括：
一个相位跟踪参考信号至少对应一个解调参考信号，具有对应关系的相位跟踪参考信号和解调参考信号使用相同的天线组进行传输；
相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相关，其中，相位跟踪参考信号对应的虚拟数据流为该相位参考信号对应的调解参考信号所对应的虚拟数据流。
可选的，若相位跟踪参考信号对应一个解调参考信号，则该相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相同；
若相位跟踪参考信号对应多个解调参考信号，则该相位跟踪参考信号使用的预编码向量由多个虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量经过运算后得到，所述多个虚拟数据流为所述多个解调参考信号对应的虚拟数据流。
本公开实施例还提供一种参考信号的传输方法，包括：
接收端接收发送端传输的数据信号；
所述接收端接收所述发送端传输的解调参考信号，并估计接收到的每个解调参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到D个解调参考信号，其中，D为大于或者等于1的整数；
所述接收端接收所述发送端传输的相位跟踪参考信号，并估计接收到的每个相位跟踪参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到M个相位跟踪参考信号，M为大于或者等于1的整数；
针对每个接收天线单元或者天线端口，所述接收端基于该天线单元或者天 线端口接收到M个相位跟踪参考信号，对接收到的D个解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
所述接收端基于补偿信道估计矩阵与获取的第二预编码矩阵，获得信道信息，其中，所述补偿信道估计矩阵包括各接收天线单元或者天线端口接收到的各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
所述接收端使用所述信道信息解调所述数据信号，得到用户数据。
可选的，所述针对每个接收天线单元或者天线端口，所述接收端基于该天线单元或者天线端口接收到M个相位跟踪参考信号，对接收到的D个解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计，包括：
针对每个接收天线单元或者天线端口，所述接收端根据获取的解调参考信号与相位跟踪参考信号的映射关系，确定该天线单元或者天线端口接收到的各相位跟踪参考信号对应的解调参考信号；
所述接收端将各相位跟踪参考信号所估计的信道与各自对应的解调参考信号所估计的信道进行比较，得到各相位跟踪参考信号对应的相位变化信息；
所述接收端使用各相位跟踪参考信号对应的相位变化信息，对各自对应的解调参考信号所估计的信道进行相位噪声补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计。
可选的，所述映射关系由所述发送端与所述接收端预先约定，或者所述方法还包括：
所述接收端接收所述发送端传输的所述映射关系。
可选的，所述接收端基于补偿信道估计矩阵与获取的第二预编码矩阵，获得信道信息，包括：
所述接收端将所述补偿信道估计矩阵与获取的第二预编码矩阵相乘，得到信道信息。
可选的，所述第二预编码矩阵的信息由所述发送端与所述接收端预先约定，或者所述方法还包括：
所述接收端接收所述发送端传输的所述第二预编码矩阵的信息；或者
所述接收端接收所述发送端传输的所述第二预编码矩阵在数据带宽上使用的规则，并基于所述规则获取所述第二预编码矩阵。
本公开实施例还提供一种发送端，包括：
编码模块，用于使用第二预编码矩阵对用户数据的数据流进行预编码，得到D个虚拟数据流；
第一传输模块，用于使用第一预编码矩阵对所述D个虚拟数据流进行预编码，并通过T个天线组向接收端传输预编码后的D个虚拟数据流，其中，每个天线组包括一个或者多个具有相同相位噪声的天线单元或者天线端口，T为大于或者等于1的整数，D为大于或者等于1的整数；
第二传输模块，用于向所述接收端传输D个解调参考信号，其中，每个解调参考信号对应一个虚拟数据流，每个调解参考信号使用的预编码向量与对应的虚拟数据流在该解调参考信号所在子载波上使用的所述第一预编码矩阵中预编码向量相同，每个解调参考信号和对应的虚拟数据流使用相同的天线组传输；
第三传输模块，用于向所述接收端传输M个相位跟踪参考信号，所述M个相位跟踪参考信号用于跟踪所述T个天线组由中一个或多个相位噪声源所引起的相位变化，M为大于或者等于1的整数。
可选的，每个虚拟数据流经过预编码后使用一个或者多个天线组传输，且同一虚拟数据流使用的一个或者多个天线组具有相同的相位噪声。
可选的，每个虚拟数据流使用的所述第一预编码矩阵中的预编码向量中除该虚拟数据流使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
可选的，每个相位跟踪参考信号经过预编码后使用一个或多个天线组传输， 且同一相位跟踪参考信号使用的一个或者多个天线组具有相同的相位噪声。
可选的，每个相位跟踪参考信号使用的预编码向量中除该相位跟踪参考信号使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
可选的，所述第二预编码矩阵的信息由所述发送端与所述接收端预先约定，或者所述发送端还包括：
第四传输模块，用于向所述接收端传输所述第二预编码矩阵的信息；或者
第五传输模块，用于向所述接收端传输所述第二预编码矩阵在数据带宽上使用的规则。
可选的，解调参考信号与相位跟踪参考信号的映射关系由所述发送端与所述接收端预先约定，或者所述发送端还包括：
第六传输模块，用于向所述接收端传输解调参考信号与相位跟踪参考信号的映射关系。
可选的，所述解调参考信号与相位跟踪参考信号的映射关系，包括：
一个相位跟踪参考信号至少对应一个解调参考信号，具有对应关系的相位跟踪参考信号和解调参考信号使用相同的天线组进行传输；
相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相关，其中，相位跟踪参考信号对应的虚拟数据流为该相位参考信号对应的调解参考信号所对应的虚拟数据流。
可选的，若相位跟踪参考信号对应一个解调参考信号，则该相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相同；
若相位跟踪参考信号对应多个解调参考信号，则该相位跟踪参考信号使用的预编码向量由多个虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量经过运算后得到，所述多个虚拟数据流为 所述多个解调参考信号对应的虚拟数据流。
本公开实施例还提供一种接收端，包括：
第一接收模块，用于接收发送端传输的数据信号；
第二接收模块，用于接收所述发送端传输的解调参考信号，并估计接收到的每个解调参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到D个解调参考信号，其中，D为大于或者等于1的整数；
第三接收模块，用于接收所述发送端传输的相位跟踪参考信号，并估计接收到的每个相位跟踪参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到M个相位跟踪参考信号，M为大于或者等于1的整数；
信道估计模块，用于针对每个接收天线单元或者天线端口，基于该天线单元或者天线端口接收到M个相位跟踪参考信号，对接收到的D个解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
获取模块，用于基于补偿信道估计矩阵与获取的第二预编码矩阵，获得信道信息，其中，所述补偿信道估计矩阵包括各接收天线单元或者天线端口接收到的各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
解调模块，用于使用所述信道信息解调所述数据信号，得到用户数据。
可选的，所述信道估计模块，包括：
确定单元，用于针对每个接收天线单元或者天线端口，根据获取的解调参考信号与相位跟踪参考信号的映射关系，确定该天线单元或者天线端口接收到的各相位跟踪参考信号对应的解调参考信号；
信道估计单元，用于将各相位跟踪参考信号所估计的信道与各自对应的解调参考信号所估计的信道进行比较，得到各相位跟踪参考信号对应的相位变化信息；
补偿单元，用于使用各相位跟踪参考信号对应的相位变化信息，对各自对应的解调参考信号所估计的信道进行相位噪声补偿，得到各解调参考信号在相 位跟踪参考信号所在符号上的补偿信道估计。
可选的，所述映射关系由所述发送端与所述接收端预先约定，或者所述接收端还包括：
第四接收模块，用于接收所述发送端传输的所述映射关系。
可选的，所述获取模块用于将所述补偿信道估计矩阵与获取的第二预编码矩阵相乘，得到信道信息。
可选的，所述第二预编码矩阵的信息由所述发送端与所述接收端预先约定，或者所述接收端还包括：
第五接收模块，用于接收所述发送端传输的所述第二预编码矩阵的信息；或者
第六接收模块，用于接收所述发送端传输的所述第二预编码矩阵在数据带宽上使用的规则，并基于所述规则获取所述第二预编码矩阵。
本公开实施例中，发送端使用第二预编码矩阵对用户数据的数据流进行预编码，得到D个虚拟数据流；发送端使用第一预编码矩阵对所述D个虚拟数据流进行预编码，并通过T个天线组向接收端传输预编码后的D个虚拟数据流，其中，每个天线组包括一个或者多个具有相同相位噪声的天线单元或者天线端口；所述发送端向所述接收端传输D个解调参考信号，其中，每个解调参考信号对应一个虚拟数据流，每个调解参考信号使用的预编码向量与对应的虚拟数据流在该解调参考信号所在子载波上使用的所述第一预编码矩阵中预编码向量相同，每个解调参考信号和对应的虚拟数据流使用相同的天线组传输；所述发送端向所述接收端传输M个相位跟踪参考信号，所述M个相位跟踪参考信号用于跟踪所述T个天线组中由一个或多个相位噪声源所引起的相位变化。由于发送端发送有相位跟踪参考信号，这样接收端使用接收的相位跟踪参考信号进行相位补偿，从而降低相位噪声的影响。
附图说明
图1为本公开实施例提供的网络结构示意图；
图2为本公开实施例提供的参考信号的传输方法的流程图；
图3为本公开实施例提供的一种参考信号子载波分布示意图；
图4为本公开实施例提供的一种信号传输示意图；
图5为本公开实施例提供的另一种参考信号子载波分布示意图；
图6为本公开实施例提供的另一种信号传输示意图；
图7为本公开实施例提供的一种发送端的结构图；
图8为本公开实施例提供的另一种发送端的结构图；
图9为本公开实施例提供的另一种发送端的结构图；
图10为本公开实施例提供的另一种发送端的结构图；
图11为本公开实施例提供的一种接收端的结构图；
图12为本公开实施例提供的另一种接收端的结构图；
图13为本公开实施例提供的另一种接收端的结构图；
图14为本公开实施例提供的另一种接收端的结构图；
图15为本公开实施例提供的另一种发送端的结构图；
图16为本公开实施例提供的另一种接收端的结构图。
具体实施方式
为使本公开技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。
参见图1，图1为本公开实施例可应用的网络结构图，如图1所示，包括发送端11和接收端12，其中，发送端11可以理解为传输(或者发送)数据的设备，而接收端12可以理解为接收数据的设备。其中，在附图中以发送端11为网络侧设备，接收端12为用户设备进行举例，但本公开实施例中，发送端11可以为用户设备，且在发送端11为用户设备时，接收端12可以是网络侧设备或者用户设备；或者发送端11为网络侧设备时，接收端12可以是用户 设备或者网络侧设备。另外，本公开实施例中，用户设备可以是手机、平板电脑(Tablet Personal Computer)、膝上型电脑(Laptop Computer)、个人数字助理(personal digital assistant，简称PDA)、移动上网装置(Mobile Internet Device，MID)或可穿戴式设备(Wearable Device)等终端侧设备，需要说明的是，在本公开实施例中并不限定发送端11的具体类型，网络侧设备可以是传输接收点(TRP，Transmission Reception Point)，或者可以是基站，基站可以是宏站，如LTE eNB、5G NR NB等。或者网络侧设备可以是接入点(AP，access point)。需要说明的是，在本公开实施例中并不限定网络侧设备的具体类型。
参见图2，本公开实施例提供参考信号的传输方法，如图2所示，包括以下步骤：
201、发送端使用第二预编码矩阵对用户数据的数据流进行预编码，得到D个虚拟数据流；
202、发送端使用第一预编码矩阵对所述D个虚拟数据流进行预编码，并通过T个天线组向接收端传输预编码后的D个虚拟数据流，其中，每个天线组包括一个或者多个具有相同相位噪声的天线单元或者天线端口，T为大于或者等于1的整数，D为大于或者等于1的整数；
203、发送端向所述接收端传输D个解调参考信号(De Modulation Reference Signal，DMRS)，其中，每个调解参考信号使用的预编码向量与对应的虚拟数据流在该解调参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相同，每个解调参考信号和对应的虚拟数据流使用相同的天线组传输；
204、发送端向所述接收端传输M个相位跟踪参考信号(Phase tracking Reference Signal，PTRS)，所述M个相位跟踪参考信号用于跟踪所述T个天线组中由一个或多个相位噪声源所引起的相位变化，M为大于或者等于1的整数。
本公开实施例中，上述用户数据可以是发送端与接收终端之前可以传输的 任何数据，例如：上行数据或者下行数据。
本公开实施例中，可以实现在进行数据流传输之前，先对用户数据的数据流进行第二预编码矩阵对应的编码，以得到上述D个数据虚拟流。例如：对用户设备的R个数据流进行第二预编码矩阵对应的编码，以得到上述D个虚拟数据流。这样可以实现用户数据通过第二预编码矩阵轮循的方式，在高速环境下进行数据传输，提高传输性能。
而上述D个虚拟数据流可以是将上述用户设备进行预编码后得到的D个数据流。另外，上述D可以是大于或者等于上述T，当然，D小于T也是可以实现的，对此不作限定。
本公开实施例中，预先将发送端的天线划分为T个天线组，且每个天线组内的各天线单元或者天线端口具有相同相位噪声，但不同天线组的天线单元或者天线端口的相位噪声可以不同。当然，也可以是存在某些天线组的相位噪声是相同，对此本公开实施例不作限定。例如：以2组为例，天线组1内的各天线单元或者天线端口具有相同相位噪声，天线组2内的天线单元或者天线端口具有相同相位噪声，但天线组1内的天线单元的相位噪声与天线组2内的天线单元的相位噪声不同，或者有3组时，可以是天线组1内的天线单元的相位噪声与天线组3内的天线单元的相位噪声不同。
上述通过T个天线组向接收端传输预编码后的所述D个虚拟数据流可以是，将上述经过第一预编码矩阵的D个虚拟数据流通过T个天线组传输。每个虚拟数据流可以通过一个或者多个天线组传输。且同一虚拟数据流使用的一个或者多个天线组具有相同的相位噪声。另外，使用不同天线组进行传输的虚拟数据流所使用的第一预编码矩阵中的预编码向量可以不同，即每个虚拟数据流所使用的第一预编码矩阵中的预编码向量与该虚拟数据流所使用的天线组对应。
上述发送端向所述接收端传输D个解调参考信号可以是，发送端为每个虚拟数据流传输一个对应的解调参考信号，且每个调解参考信号使用的预编码 向量与对应的虚拟数据流在该解调参考信号所在子载波上使用的第一预编码矩阵中的预编码向量相同相同，每个解调参考信号和对应的虚拟数据流使用相同的天线组传输。即第i个解调参考信号使用的预编码与第i个虚拟数据流在第i个解调参考信号所在子载波上使用的第一预编码相同，第i个解调参考信号和第i个虚拟数据流使用同一天线组传输，所述i为1至D中任一整数。例如：调解参考信号1与虚拟数据流1对应，那么，解调参考信号1使用的天线组和第一预编码和虚拟数据流1使用的天线组相同，且解调参考信号1使用的预编码与虚拟数据流1在解调参考信号1所在子载波上使用的第一预编码相同。
本公开实施例中，上述M个相位跟踪参考信号用于跟踪所述T个天线组由一个或多个相位噪声源所引起的相位变化可以是，每个相位跟踪参考信号对应一个或者多个天线组，每个相位跟踪参考信号用于跟踪对应天线组中由一个或者多个相位噪声源所引起的相位变化。即接收端接收到M个相位跟踪参考信号后，就可以估计各天线组的相位噪声，其中，天线组的相位噪声可以是理解为信号使用天线组进行传输时的在不同符号上的相位变化。需要说明的是，本公开实施例中，对相位跟踪参考信号不作限定，该参考信号可以是任何能够跟踪天线单元或者天线端口传输的每个符号的相位变化的参考信号，其可以与解调参考信号类似，在传输用户数据时使用，并经过预编码后进行传输。
上述发送端向所述接收端传输M个相位跟踪参考信号可以是，每个相位跟踪参考信号使用一个或者多个天线组传输，且同一相位跟踪参考信号使用的一个或者多个天线组具有相同的相位噪声。这样可以实现让接收端根据接收到的相位跟踪参考信号对各天线组发送的解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计，基于补偿信道估计获取信道信息，使用该信道信息解调接收到的数据信号，以得到上述用户数据。这样可以降低相位噪声对用户数据的影响，甚至可以消除相位噪声对用户数据的影响，保证数据的准确传输。
需要说明的是，本公开实施例中，对步骤201至步骤204执行顺序不作限 定。其中，附图中以先执行步骤201，再执行步骤202，之后执行步骤203，最后执行步骤204进行举例说明，但本公开实施例对此不作限定，例如：本公开实施例中，还可以是先执行步骤203，再执行步骤201和步骤202，而步骤204则可以与步骤202同步时间；又或者可以是步骤203和步骤204同时执行，在步骤203和步骤204执行完后，再执行步骤201和步骤202。其中，上述虚拟数据流、调解参考信号和相位跟踪参考信号可以是在同一子帧或者同一时隙(slot)内传输，对此本公开实施例不作限定。
其中，接收端的实现过程可以如下：
接收端接收发送端传输的数据信号；
所述接收端接收所述发送端传输的解调参考信号，并估计接收到的每个解调参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到D个解调参考信号，其中，D为大于或者等于1的整数；
所述接收端接收所述发送端传输的相位跟踪参考信号，并估计接收到的每个相位跟踪参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到M个相位跟踪参考信号，M为大于或者等于1的整数；
针对每个接收天线单元或者天线端口，所述接收端基于该天线单元或者天线端口接收到M个相位跟踪参考信号，对接收到的D个解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
所述接收端基于补偿信道估计矩阵与获取的第二预编码矩阵，获得信道信息，其中，所述补偿信道估计矩阵包括各接收天线单元或者天线端口接收到的各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
所述接收端使用所述信道信息解调所述数据信号，得到用户数据。
其中，上述数据信号可以称作接收端的接收信号，即发送端执行步骤201后接收端接收到的接收信号。
另外，需要说明的是，由于接收端可以存在多个接收天线单元或者天线端 口，但在接收端并不对其进行分组，而是每个接收天线单元或者天线端口均会接收到D个解调参考信号和M个相位跟踪参考信号。从而可以估计每个接收到的每个解调参考信号的信道，以及估计每个接收到的相位跟踪参考信号的信道。
这样针对每个接收天线单元或者天线端口，就可以基于该接收天线单元或者天线端口接收到M个相位跟踪参考信号，对接收到的D个解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在该相位跟踪参考信号所在符号上的补偿信道估计。其中，对接收到的D个解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计，可以是使用相位跟踪参考信号估计的信道对与之对应的解调参考信号估计的信道进行相位噪声估计，并基于估计的相位噪声对调解参考信号所估计的信道进行相位补偿，以得到解调参考信号在相应相位跟踪参考信号所在符号上的补偿信道估计。因为M个相位跟踪参考信号用于跟踪所述T个天线组由一个或多个相位噪声源所引起的相位变化，而每个天线组都发送有解调参考信号，那么，每个相位跟踪参考信号就会存在对应的解调参考信号，进而对使用各相位跟踪参考信号对其对应的解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相应相位跟踪参考信号所在符号上的补偿信道估计。
当得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计，就可以使用基于补偿信道估计矩阵与获取的第二预编码矩阵，获得信道信息，例如：将可以将所述补偿信道估计矩阵与获取的第二预编码矩阵进行预设运算得到信道信息，该预设运算包括但不限于将所述补偿信道估计矩阵与获取的第二预编码矩阵相乘。这样使用该信道信息解调数据信号，就可以消除相位噪声对用户数据的影响。另外，该信道信息可以理解为用户数据所经历的完整信道信息，该信道信息可以表现为一矩阵。这样接收端就可以使用该信道信息解调所述数据信号，得到用户数据，以实现降低相位噪声对用户数据的影响，甚至可以消除相位噪声对用户数据的影响，保证数据的准确传输。
需要说明的是，本公开实施例中，接收天线单元或者天线端口，并不限定这些天线单元或者天线端口只能进行接收，其还可以进行发送，只是针对接收端在本公开实施例中描述的是接收相应动作，从而以接收天线单元或者无线端口进行描述，但并不作限定。
可选的，本公开实施例，每个虚拟数据流经过预编码后使用一个或者多个天线组传输，且同一虚拟数据流使用的一个或者多个天线组具有相同的相位噪声。
该实施方式中，可以实现同一虚拟数据流可以使用一个或者多个天线组传输，且这一个或者多个天线组具有相同的相位噪声，从而方便接收端进行相位补偿，以进一步消除相位噪声的影响。
另外，该实施方式中，每个虚拟数据流使用的第一预编码可以与其传输的天线组对应，例如：虚拟数据流1通过天线组1传输，那么，虚拟数据流1使用的第一预编码就与天线组1对应，虚拟数据流2通过天线组2传输，那么，虚拟数据流2使用的第一预编码就与天线组2对应。每个虚拟数据流使用的第一预编码与各自传输的天线组对应，这样可以实现每个虚拟数据流的相位噪声影响只是对应的天线组的相位噪声影响，而不受其他天线组的影响。
可选的，该实施方式中，每个虚拟数据流使用的所述第一预编码矩阵中的预编码向量中除该虚拟数据流使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
该实施方式中，可以实现每个虚拟数据流使用的第一预编码矩阵中的预编码向量除该虚拟数据流传输使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。即每个虚拟数据流在步骤202进行预编码时，使用的第一预编码矩阵中的预编码向量中除自己传输的天线组所对应的权值之外，其余天线单元或者天线端口所对应的权值均为零，而第一预编码矩阵中的预编码向量中自己传输的天线组所对应的权值，就是该天线组内各天线单元或者天线端口的权值，此权值可以由接收端反馈或者 根据上下行互易性由发送端确定。这样可以实现每个虚拟数据流只会受到自己传输使用的天线组的相位噪声影响，而针对每个天线组都传输有相应的相位跟踪参考信号，这样接收端就可以估计出各解调信号的相位噪声，从而可以消除相位噪声对用户数据的影响。
可选的，每个相位跟踪参考信号经过预编码后使用一个或多个天线组传输，且同一相位跟踪参考信号使用的一个或者多个天线组具有相同的相位噪声。
该实施方式中，可以实现每个相位跟踪参考信号使用一个或者多个天线组传输，且这一个或者多个天线组具有相同的相位噪声，从而实现一个相位跟踪参考信号跟踪一个相位噪声源引入的相位噪声，以方便接收端估计各天线组的相位变化，以进一步消除相位噪声的影响。
可选的，该实施方式中，每个相位跟踪参考信号使用的预编码向量中除该相位跟踪参考信号使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
该实施方式中，可以实现每个相位跟踪参考信号使用的预编码向量除该相位跟踪参考信号传输使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。即每个除除在进行预编码时，使用的预编码向量中除自己传输的天线组之外，其余天线单元或者天线端口所对应的权值均为零，而预编码中自己传输的天线组所对应的权值，就是该天线组内各天线单元或者天线端口的权值，此权值可以由接收端反馈或者根据上下行互易性由发送端确定。这样可以实现每个相位跟踪参考信号只会受到自己传输使用的天线组的相位噪声影响，以有效地跟踪自己传输使用的天线组的相位变化，有利于消除相位噪声对用户数据的影响。
可选的，本公开实施例中，所述第二预编码矩阵的信息由所述发送端与所述接收端预先约定，或者所述方法还包括：
所述发送端向所述接收端传输所述第二预编码矩阵的信息；或者
所述发送端向所述接收端传输所述第二预编码矩阵在数据带宽上使用的 规则。
该实施方式中，发送端可以通过高层信令或动态控制信令等方式告知接收端上述第二预编码矩阵，以及还可以实现通过告知第二预编码矩阵在数据带宽上使用的规则，让接收端基于该规则获取到上述第二预编码矩阵，或者预先约定好。另外，本公开实施例中，上述第二预编码矩阵可以是发送端在全部数据带宽上使用的第二预编码矩阵，从而发送端向接收端告知的第二预编码矩阵也就是全部数据带宽上使用的第二预编码矩阵。
另外，该实施方式中，当采用预先约定的方式，这样发送端就可以不用向接收端发送第二预编码矩阵的信息和上述第二预编码矩阵在数据带宽上使用的规则，从而可以减少传输开销。而当不采用预先约定的方式，则发送端向接收端发送第二预编码矩阵的信息和上述第二预编码矩阵在数据带宽上使用的规则，这样可以实现第二预编码矩阵和上述第二预编码矩阵在数据带宽上使用的规则由发送端决策，从而可以提高第二预编码矩阵的灵活性，以更好的适应业务的需求，以提高业务性能。
可选的，解调参考信号与相位跟踪参考信号的映射关系由所述发送端与所述接收端预先约定，或者所述方法还包括：
所述发送端向所述接收端传输解调参考信号与相位跟踪参考信号的映射关系。
其中，发送端可以通过高层信令或动态控制信令等方式告知接收端相位跟踪参考信号PTRS与DMRS之间的映射关系。其中，该映射关系具体可以是PTRS端口与DMRS端口之间的映射关系，因为在传输PTRS与DMRS都是采用端口进行传输，那么，PTRS端口与DMRS端口存在映射关系，从而也就将PTRS与DMRS存在映射关系。另外，本公开实施例中，一个PTRS也可以理解为一个PTRS端口，而一个DMRS也可以理解为一个DMRS端口。
另外，该实施方式中，当采用预先约定的方式，这样发送端就可以不用向接收端上述映射关系，从而可以减少传输开销。而当不采用预先约定的方式， 则发送端向接收端发送上述映射关系，这样可以实现上述映射关系由发送端决策，从而可以提高上述映射关系的灵活性，以更好的适应业务的需求，以提高业务性能。
另外，该实施方式中，由于接收端会获取到上述映射关系，从而就可以准确确定各相位跟踪参考信号对应调解参考信号，进而对使用相位跟踪参考信号估计的信道对各自对应的解调参考信号估计的信道进行相位补偿，以消除各解调参考信号的相位噪声影响。
例如：针对每个天线单元或者天线端口，接收端都可以根据获取的解调参考信号与相位跟踪参考信号的映射关系，确定该天线单元或者天线端口接收到的各相位跟踪参考信号对应的解调参考信号；并将各相位跟踪参考信号所估计的信道与各自对应的解调参考信号所估计的信道进行比较，得到各相位跟踪参考信号对应的相位变化信息；以及使用各相位跟踪参考信号对应的相位变化信息，对各自对应的解调参考信号所估计的信道进行相位噪声补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计。
例如：以一个天线端口接收到一个相位跟踪参考信号为例，接收端可以根据上述映射关系确定接收到的该相位跟踪参考信号对应的解调参考信号，从而就可以将该相位跟踪参考信号所估计的信道与该相位跟踪参考信号对应的解调参考信号所估计的信道进行比较，从而得到该相位跟踪参考信号对应的相位变化信息，该相位变化信息可以理解为相位噪声估计。当得到该相位跟踪参考信号对应的相位变化信息后，就可以将该相位变化信息对该相位跟踪参考信号对应的解调参考信号所估计的信道进行相位噪声补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计。例如：将该相位变化信息乘以解调参考信号估计的信道，以得到该在相位跟踪参考信号所在符号上的补偿信道估计。
可选的，解调参考信号与相位跟踪参考信号的映射关系，包括：
一个相位跟踪参考信号至少对应一个解调参考信号，具有对应关系的相位 跟踪参考信号和解调参考信号使用相同的天线组进行传输；
相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相关，其中，相位跟踪参考信号对应的虚拟数据流为该相位参考信号对应的调解参考信号所对应的虚拟数据流。
该实施方式中，可以实现一个相位跟踪参考信号至少对应一个解调参考信号，且具有对应关系的相位跟踪参考信号和解调参考信号使用相同的天线组进行传输，这样接收端使用相位跟踪参考信号估计的信道，对其对应的解调参考信号所估计的信道进行相位补偿，可以让相位补偿更加精确，因为存在对应关系的相位跟踪参考信号和解调参考信号是使用相同的天线组进行传输的。
另外，由于相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的第一预编码矩阵中的预编码向量相关，这样可以有利于接收端基于相位跟踪参考信号估计的信道信息解调接收端接收的数据信号，以进一步消除相位噪声对用户数据的影响。
可选的，若相位跟踪参考信号对应一个解调参考信号，则该相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相同；
若相位跟踪参考信号对应多个解调参考信号，则该相位跟踪参考信号使用的预编码向量由多个虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量经过运算后得到，所述多个虚拟数据流为所述多个解调参考信号对应的虚拟数据流。
该实施方式中，由于相位跟踪参考信号对应一个解调参考信号时，相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的第一预编码矩阵中的预编码向量相同，这样相位跟踪参考信号和对应的虚拟数据流经历的信道特性相同，有利于接收端基于相位跟踪参考信号估计的信道信息解调接收端接收的数据信号，以进一步消除相位噪声对用 户数据的影响。另外，上述运算后得到可以是将多个虚拟数据流在该相位跟踪参考信号所在子载波上使用的第一预编码进行预设运算，例如：相加等，对此本公开实施例不作限定。
需要说明的是，本公开实施例中上述介绍的多种可选的实施方式之间可以相互结合实现，也可以单独实现，对此本公开实施例不作限定。例如：如下举例：
例一：
假设待传输的用户数据流数R＝2，发送端的天线阵列中前N1个天线单元或天线端口具有相同的相位噪声分为一组，后N-N1个天线单元或天线端口具有相同的相位噪声分为一组，即T＝2，两组之间的相位噪声不同，这样需要M＝2个PTRS端口。接收端使用2天线或天线端口进行接收。假设需要D＝2个DMRS端口，参考信号的子帧配置如图3所示。其中DMRS位于第三个OFDM符号，包含2个端口，在符号内频分复用。每个PTRS参考信号占用一个子载波(PTRS端口1配置在第5个子载波上，PTRS端口2配置在第4个子载波上)，在第4至14个符号上连续传输。第1-2个OFDM信号为控制信道，其余部分为用户数据。
发送端侧(例如：基站侧)：
假设系统中的第二预编码矩阵集合中有S个第二预编码矩阵，此第二预编码矩阵集合为基站侧与接收端所共知。基站侧配置在用户数据带宽内的第k个子载波上使用第二预编码矩阵集合中的索引为mod(k，S)的索引值所对应的第二预编码矩阵，其中mod为取模操作。
假设用户数据的R＝2个数据流经过以下D×R维的第二预编码矩阵W2后，得到2个虚拟化数据流，将其定义为虚拟化第一数据流和虚拟化第二数据流。此第二预编码矩阵可以由基站在一个预定义的预编码矩阵集合中选择。
Figure PCTCN2017119381-appb-000001
将虚拟化第一数据流在发射端的前N1个天线单元或天线端口上传输，将虚拟化第二数据流在发射端的后N-N1个天线单元或天线端口上传输。此时这两个虚拟化数据流所使用的第一预编码矩阵表示为：
Figure PCTCN2017119381-appb-000002
其中，
Figure PCTCN2017119381-appb-000003
为N 1×1的列向量，其对应于第一虚拟化数据流所使用的预编码中，前N1个天线单元或天线端口所对应的权值。
Figure PCTCN2017119381-appb-000004
为(N-N 1)×1的列向量，其对应于第二虚拟化数据流所使用的预编码中，后N-N1个天线单元或天线端口所对应的权值。
DMRS端口1在发送端的前N1个天线单元或天线端口上传输，如图3所示，其分布在子载波d1＝2，4，6，8，10，12上。对于子载波d1上的DMRS1，其使用与第一虚拟数据流在此子载波上相同的预编码
Figure PCTCN2017119381-appb-000005
DMRS端口2在发送端的后N-N1个天线单元或天线端口上传输，如图3所示，其分布在子载波d2＝1，3，5，7，9，11上。对于子载波d2上的DMRS2，其使用与第二虚拟数据流在此子载波上相同的预编码
2个PTRS端口用于估计两个部分的相位噪声。其中PTRS端口1使用
Figure PCTCN2017119381-appb-000007
进行预编码，PTRS端口2使用
Figure PCTCN2017119381-appb-000008
进行预编码。其中，图4给出了所述传输的示意图。
基站侧将PTRS1映射至DMRS1，PTRS2映射至DMRS2的信息通过高层信令或动态控制信令告知终端。同时，基站侧通过高层信令或动态控制信令告知终端，第一数据流映射至DMRS端口1，第二数据流映射至DMRS端口2。
基站侧将其配置的每个子载波上使用的第二预编码矩阵在第二预编码矩阵集合中的索引通过高层信令告知终端。
而该举例中，接收端(例如：终端侧)：
假设接收端的两天线或天线端口具有不同的相位噪声，则在第l个符号的第k个子载波接收到的数据信号表示为
Figure PCTCN2017119381-appb-000009
进一步表示为：
Figure PCTCN2017119381-appb-000010
其中，假设信道H k，l和预编码w k，l在一个时间单位(子帧)中保持不变。发送端相位噪声矩阵的对角线上，
Figure PCTCN2017119381-appb-000011
的元素有N1个，
Figure PCTCN2017119381-appb-000012
的元素有N-N1个。
接收端在第三个OFDM符号接收DMRS参考信号。以第1个接收天线单元或者天线端口为例，其可以由DMRS端口1估计出合成信道
Figure PCTCN2017119381-appb-000013
且由DMRS端口2估计出合成信道
Figure PCTCN2017119381-appb-000014
在DMRS所在符号上，利用信道插值可以估计出所有子载波的信道，根据图2的假设，这里k＝1，2，…，12。
接收端从第4个OFDM符号，接收2端口PTRS，并使用PTRS端口1估计出
Figure PCTCN2017119381-appb-000015
使用PTRS端口2估计出
Figure PCTCN2017119381-appb-000016
l≥4。
接收端接收发送端通过信令告知的PTRS1-2分别与DMRS1-2一一映射的信息。根据此信息，使用PTRS1的信道估计结果与DMRS1的信道估计结果进行相除，得出第一根接收天线或天线端口上第1个符号相对于第3个符号的发送端第一组天线单元或天线端口所经历的相位变化，表示为
Figure PCTCN2017119381-appb-000017
以及第一根接收天线或天线端口上第1个符号相对于第3个符号的发送端 第二组天线单元或天线端口所经历的相位变化，表示为
Figure PCTCN2017119381-appb-000018
由此可以得到第一根接收天线或天线端口上，第1个符号的第k个子载波上的信道估计，
Figure PCTCN2017119381-appb-000019
类似的，可以得出第二根接收天线或天线端口上，第1个符号的第k个子载波上的信道估计，
Figure PCTCN2017119381-appb-000020
根据发送端通过信令告知的第二预编码矩阵索引，在第二预编码矩阵集合中确定第k个子载波上使用的第二预编码矩阵。将上述所有天线上估计出的信道矩阵与确定出的第二预编码矩阵相乘，可以获得用户数据所经历的完整信道信息，表示为
Figure PCTCN2017119381-appb-000021
根据以上估计出的完整信道信息可以解调出每个流的用户数据。其他子载波可以同理获得，不再赘述。
例二：
假设待传输的用户数据流数R＝3，发送端的天线阵列中前N1个天线单元或天线端口具有相同的相位噪声分为一组，后N-N1个天线单元或天线端口具有相同的相位噪声分为一组，即T＝2，两组之间的相位噪声不同，这样需要M＝2个PTRS端口。假设使用D＝4个DMRS端口，接收端使用4个天线单元或天线端口，参考信号的子帧配置如图5所示。其中DMRS位于第三个OFDM符号，包4个端口，在符号内频分复用。每个PTRS参考信号占用一个子载波(PTRS端口1配置在第5个子载波上，PTRS端口2配置在第4个子载波上)，在第4至14个符号上连续传输。第1-2个OFDM信号为控制信道，其余部分为用户数据。
侧发送端(例如：基站侧)：
假设系统中的第二预编码矩阵集合中有S个第二预编码矩阵，此第二预编码矩阵集合为基站侧与接收侧所共知。基站侧与终端侧预先约定，在用户数据带宽内的第k个子载波上使用第二预编码矩阵集合中的索引为mod(k，S)的索引值所对应的第二预编码矩阵，其中mod为取模操作。
以第k个子载波为例，假设用户的R＝3个数据流经过以下D×R维的第二预编码矩阵W2后，得到4个虚拟化数据流，将其定义为虚拟化第一至第四数据流。
Figure PCTCN2017119381-appb-000022
将虚拟化第一数据流和虚拟化第二数据流在发射端的前N1个天线单元或天线端口上传输，将虚拟化第三数据流和虚拟化第四数据流在发射端的后N-N1个天线单元或天线端口上传输。此时这4个虚拟化数据流所使用的第一预编码矩阵表示为
Figure PCTCN2017119381-appb-000023
其中，
Figure PCTCN2017119381-appb-000024
和
Figure PCTCN2017119381-appb-000025
为N 1×1的列向量，其对应于第一和第二虚拟数据流所使用的预编码中，前N1个天线单元或天线端口所对应的权值。
Figure PCTCN2017119381-appb-000026
和
Figure PCTCN2017119381-appb-000027
为(N-N 1)×1的列向量，其对应于第三和第四虚拟数据流所使用的预编码中，后N-N1个天线单元或天线端口所对应的权值。
DMRS端口1在发射端的前N1个天线单元或天线端口上传输，如图5所示，其分布在子载波d1＝4，8，12上。对于子载波d1上的DMRS1，其使用与第一虚拟数据流在此子载波上相同的预编码
Figure PCTCN2017119381-appb-000028
DMRS端口2也在发射端的前N1个天线单元或天线端口上传输，其分布在子载波d2＝3，7，11上。对于子载波d2上的DMRS2，其使用与第二虚拟数据流在此子载波上相同的预编码
Figure PCTCN2017119381-appb-000029
DMRS端口3和DMRS端口4均在发射端的后N-N1个天线单元或天线端口上传输。DMRS3分布在d3＝2，6，10上，DMRS4分布在d4＝1，5，9上。其分别使用与第三虚拟数据流在子载波d3上相同的预编码
Figure PCTCN2017119381-appb-000030
和第四虚拟数据流在子载波d4上相同的预编码
Figure PCTCN2017119381-appb-000031
2个PTRS端口用于估计两个部分的相位噪声。其中PTRS端口1使用
Figure PCTCN2017119381-appb-000032
进行预编码，PTRS端口2使用
Figure PCTCN2017119381-appb-000033
进行预编码。其中，图6给出了所述传输的示意图。
基站侧将PTRS1映射至DMRS1和DMRS2，PTRS2映射至DMRS3和DMRS4的信息通过高层信令或动态控制信令告知终端。
该举例中，接收端(例如：终端侧)：
在第l个符号的第k个子载波接收到的数据信号表示为
Figure PCTCN2017119381-appb-000034
进一步表示为：
Figure PCTCN2017119381-appb-000035
其中，假设信道H k，l和预编码w k，l在一个时间单位(子帧)中保持不变。发送端相位噪声矩阵的对角线上，
Figure PCTCN2017119381-appb-000036
的元素有N1个，
Figure PCTCN2017119381-appb-000037
的元素有N-N1个。
接收端在第三个OFDM符号接收DMRS参考信号。以第二根接收天线或 天线端口为例，由DMRS端口1估计出合成信道
Figure PCTCN2017119381-appb-000038
由DMRS端口2估计出
Figure PCTCN2017119381-appb-000039
由DMRS端口3估计出
Figure PCTCN2017119381-appb-000040
由DMRS端口4估计出
Figure PCTCN2017119381-appb-000041
在DMRS所在符号上，利用信道插值可以估计出所有子载波的信道，根据图4的假设，这里k＝1，2，…，12。
接收端从第4个OFDM符号，接收2端口PTRS，并使用PTRS端口1估计出
Figure PCTCN2017119381-appb-000042
使用PTRS端口2估计出
Figure PCTCN2017119381-appb-000043
接收端接收发送端通过信令告知的PTRS1映射至DMRS1和DMRS2的信息。根据此信息，使用PTRS1的信道估计结果与DMRS1和DMRS2的信道估计结果之和进行相除，得出第二根接收天线或天线端口上第1个符号相对于第3个符号的发送端第一组天线单元或天线端口所经历的相位变化，表示为
Figure PCTCN2017119381-appb-000044
根据发送端通过信令告知的PTRS2映射至DMRS3和DMRS4的信息，得出第二根接收天线上第1个符号相对于第3个符号的发送端第二组天线单元或天线端口所经历的相位变化，表示为
Figure PCTCN2017119381-appb-000045
将此相位变化乘以第三个符号估计出的信道，由此可以得到第二根接收天线或天线端口上，第1个符号的第k个子载波上的信道估计，
Figure PCTCN2017119381-appb-000046
Figure PCTCN2017119381-appb-000047
类似的可以得出第一、三和四根接收天线或天线端口上，第1个符号的第k个子载波上的信道估计。
根据发送端与接收端的预先约定的第二预编码矩阵使用规则，可以确定在子载波k上使用的第二预编码矩阵为索引mod(k，S)所对应的预编码矩阵。 与实施例1相同，将上述所有天线上估计出的信道矩阵与确定出的第二预编码矩阵相乘，可以获得子载波k上用户数据所经历的完整信道信息。
根据以上估计出的完整信道信息可以解调出每个流的用户数据。其他子载波可以同理获得，不再赘述。
本公开实施例，发送端使用第二预编码矩阵对用户数据的数据流进行预编码，得到D个虚拟数据流；发送端使用第一预编码矩阵对所述D个虚拟数据流进行预编码，并通过T个天线组向接收端传输预编码后的D个虚拟数据流，其中，每个天线组包括一个或者多个具有相同相位噪声的天线单元或者天线端口；所述发送端向所述接收端传输D个解调参考信号，其中，每个解调参考信号对应一个虚拟数据流，每个调解参考信号使用的预编码向量与对应的虚拟数据流在该解调参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相同，每个解调参考信号和对应的虚拟数据流使用相同的天线组传输；所述发送端向所述接收端传输M个相位跟踪参考信号，所述M个相位跟踪参考信号用于跟踪所述T个天线组中由一个或多个相位噪声源所引起的相位变化。由于发送端发送有相位跟踪参考信号，这样接收端使用接收的相位跟踪参考信号进行相位补偿，从而降低相位噪声的影响。
参见图7，本公开实施例还提供一种参考信号的传输方法，如图7所示，包括以下步骤：
701、接收端接收发送端传输的数据信号；
702、接收端接收所述发送端传输的解调参考信号，并估计接收到的每个解调参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到D个解调参考信号，其中，D为大于或者等于1的整数；
703、接收端接收所述发送端传输的相位跟踪参考信号，并估计接收到的每个相位跟踪参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到M个相位跟踪参考信号，M为大于或者等于1的整数；
704、针对每个接收天线单元或者天线端口，所述接收端基于该天线单元 或者天线端口接收到M个相位跟踪参考信号，对接收到的D个解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
705、接收端基于补偿信道估计矩阵与获取的第二预编码矩阵，获得信道信息，其中，所述补偿信道估计矩阵包括各接收天线单元或者天线端口接收到的各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
706、接收端使用所述信道信息解调所述数据信号，得到用户数据。
需要说明的是，步骤704针对每个天线单元或者天线端口均会执行相应的操作，其中，各天线单元或者天线端的说明具体可以参考图2所示的实施例的说明，此处不作赘述，且可以达到相同有益效果。另外，本公开实施例中，对步骤701至步骤703执行顺序不作限定。
可选的，所述针对每个接收天线单元或者天线端口，所述接收端基于该天线单元或者天线端口接收到M个相位跟踪参考信号，对接收到的D个解调参考信号进行相位噪声估计并进行补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计，包括：
针对每个接收天线单元或者天线端口，所述接收端根据获取的解调参考信号与相位跟踪参考信号的映射关系，确定该天线单元或者天线端口接收到的各相位跟踪参考信号对应的解调参考信号；
所述接收端将各相位跟踪参考信号所估计的信道与各自对应的解调参考信号所估计的信道进行比较，得到各相位跟踪参考信号对应的相位变化信息；
所述接收端使用各相位跟踪参考信号对应的相位变化信息，对各自对应的解调参考信号所估计的信道进行相位噪声补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计。
可选的，所述映射关系由所述发送端与所述接收端预先约定，或者所述方法还包括：
所述接收端接收所述发送端传输的所述映射关系。
可选的，所述接收端基于补偿信道估计矩阵与获取的第二预编码矩阵，获得信道信息，包括：
所述接收端将所述补偿信道估计矩阵与获取的第二预编码矩阵相乘，得到信道信息。
可选的，所述第二预编码矩阵的信息由所述发送端与所述接收端预先约定，或者所述方法还包括：
所述接收端接收所述发送端传输的所述第二预编码矩阵的信息；或者
所述接收端接收所述发送端传输的所述第二预编码矩阵在数据带宽上使用的规则，并基于所述规则获取所述第二预编码矩阵。
需要说明的是，本实施例作为与图2所示的实施例中对应的接收端的实施方式，其具体的实施方式可以参见图2所示的实施例的相关说明，以为避免重复说明，本实施例不再赘述。本实施例中，同样可以实现降低相位噪声的影响。。
参见图8，本公开实施例提供一种发送端，如图8所示，发送端800，包括：
编码模块801，用于使用第二预编码矩阵对用户数据的数据流进行预编码，得到D个虚拟数据流；
第一传输模块802，用于使用第一预编码矩阵对所述D个虚拟数据流进行预编码，并通过T个天线组向接收端传输预编码后的D个虚拟数据流，其中，每个天线组包括一个或者多个具有相同相位噪声的天线单元或者天线端口，T为大于或者等于1的整数，D为大于或者等于1的整数；
第二传输模块803，用于向所述接收端传输D个解调参考信号，其中，每个解调参考信号对应一个虚拟数据流，每个调解参考信号使用的预编码向量与对应的虚拟数据流在该解调参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相同，每个解调参考信号和对应的虚拟数据流使用相同的天线组传输；
第三传输模块804，用于向所述接收端传输M个相位跟踪参考信号，所 述M个相位跟踪参考信号用于跟踪所述T个天线组中由一个或多个相位噪声源所引起的相位变化，M为大于或者等于1的整数。
可选的，每个虚拟数据流经过预编码后使用一个或者多个天线组传输，且同一虚拟数据流使用的一个或者多个天线组具有相同的相位噪声。
可选的，每个虚拟数据流使用的所述第一预编码矩阵中的预编码向量中除该虚拟数据流使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
可选的，每个相位跟踪参考信号使用的预编码向量中除该相位跟踪参考信号使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
可选的，每个相位跟踪参考信号使用的预编码中除该相位跟踪参考信号使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
可选的，解调参考信号与相位跟踪参考信号的映射关系由所述发送端与所述接收端预先约定，或者如图9所示，发送端800还包括：
第四传输模块805，用于向所述接收端传输所述第二预编码矩阵的信息；或者
第五传输模块806，用于向所述接收端传输所述第二预编码矩阵在数据带宽上使用的规则。
可选的，如图10所示，发送端800还包括：
第六传输模块807，用于向所述接收端传输解调参考信号与相位跟踪参考信号的映射关系；或者
解调参考信号与相位跟踪参考信号的映射关系由所述发送端与所述接收端预先约定。
可选的，所述解调参考信号与相位跟踪参考信号的映射关系，包括：
一个相位跟踪参考信号至少对应一个解调参考信号，具有对应关系的相位 跟踪参考信号和解调参考信号使用相同的天线组进行传输；
相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相关，其中，相位跟踪参考信号对应的虚拟数据流为该相位参考信号对应的调解参考信号所对应的虚拟数据流。
可选的，若相位跟踪参考信号对应一个解调参考信号，则该相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相同；
若相位跟踪参考信号对应多个解调参考信号，则该相位跟踪参考信号使用的预编码向量由多个虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量经过运算后得到，所述多个虚拟数据流为所述多个解调参考信号对应的虚拟数据流。
需要说明的是，本实施例中上述发送端800可以是本公开实施例中方法实施例中任意实施方式的发送端，本公开实施例中方法实施例中发送端的任意实施方式都可以被本实施例中的上述发送端800所实现，以及达到相同的有益效果，此处不再赘述。
参见图11，本公开实施例提供一种接收端，如图11所示，接收端1100包括：
第一接收模块1101，用于接收发送端传输的数据信号；
第二接收模块1102，用于接收所述发送端传输的解调参考信号，并估计接收到的每个解调参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到D个解调参考信号，其中，D为大于或者等于1的整数；
第三接收模块1103，用于接收所述发送端传输的相位跟踪参考信号，并估计接收到的每个相位跟踪参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到M个相位跟踪参考信号，M为大于或者等于1的整数；
信道估计模块1104，用于针对每个接收天线单元或者天线端口，基于该天线单元或者天线端口接收到M个相位跟踪参考信号，对接收到的D个解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
获取模块1105，用于基于补偿信道估计矩阵与获取的第二预编码矩阵，获得信道信息，其中，所述补偿信道估计矩阵包括各接收天线单元或者天线端口接收到的各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
解调模块1106，用于使用所述信道信息解调所述数据信号，得到用户数据。
可选的，如图12所示，信道估计模块1104，包括：
确定单元11041，用于针对每个接收天线单元或者天线端口，根据获取的解调参考信号与相位跟踪参考信号的映射关系，确定该天线单元或者天线端口接收到的各相位跟踪参考信号对应的解调参考信号；
信道估计单元11042，用于将各相位跟踪参考信号所估计的信道与各自对应的解调参考信号所估计的信道进行比较，得到各相位跟踪参考信号对应的相位变化信息；
补偿单元11043，用于使用各相位跟踪参考信号对应的相位变化信息，对各自对应的解调参考信号所估计的信道进行相位噪声补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计。
可选的，所述映射关系由所述发送端与所述接收端预先约定，或者如图13，所述接收端1100还包括：
第四接收模块1107，用于接收所述发送端传输的所述映射关系。
可选的，获取模块1105用于将所述补偿信道估计矩阵与获取的第二预编码矩阵相乘，得到信道信息。
可选的，所述第二预编码矩阵的信息由所述发送端与所述接收端预先约定，或者如图14，所述接收端1100还包括：
第五接收模块1108，用于接收所述发送端传输的所述第二预编码矩阵的信息；或者
第六接收模块1109，用于接收所述发送端传输的所述第二预编码矩阵在数据带宽上使用的规则，并基于所述规则获取所述第二预编码矩阵。
需要说明的是，本实施例中上述接收端1100可以是本公开实施例中方法实施例中任意实施方式的接收端，本公开实施例中方法实施例中接收端的任意实施方式都可以被本实施例中的上述接收端1100所实现，以及达到相同的有益效果，此处不再赘述。
参见图15，本公开实施例提供另一种发送端的结构，该发送端包括：处理器1500、收发机1510、存储器1520、用户接口1530和总线接口，其中：
处理器1500，用于读取存储器1520中的程序，执行下列过程：
使用第二预编码矩阵对用户数据的数据流进行预编码，得到D个虚拟数据流；
使用第一预编码矩阵对所述D个虚拟数据流进行预编码，并通过T个天线组向接收端传输预编码后的D个虚拟数据流，其中，每个天线组包括一个或者多个具有相同相位噪声的天线单元或者天线端口，T为大于或者等于1的整数，D为大于或者等于1的整数；
向所述接收端传输D个解调参考信号，其中，每个解调参考信号对应一个虚拟数据流，每个调解参考信号使用的预编码向量与对应的虚拟数据流在该解调参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相同，每个解调参考信号和对应的虚拟数据流使用相同的天线组传输；
向所述接收端传输M个相位跟踪参考信号，所述M个相位跟踪参考信号用于跟踪所述T个天线组中由一个或多个相位噪声源所引起的相位变化，M为大于或者等于1的整数。
其中，收发机1510，用于在处理器1500的控制下接收和发送数据，且收发机1510包括上述T个天线组。
在图15中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1500代表的一个或多个处理器和存储器1520代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1510可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备，用户接口1530还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器1500负责管理总线架构和通常的处理，存储器1520可以存储处理器1500在执行操作时所使用的数据。
可选的，每个虚拟数据流经过预编码后使用一个或者多个天线组传输，且同一虚拟数据流使用的一个或者多个天线组具有相同的相位噪声。
可选的，每个虚拟数据流使用的所述第一预编码矩阵中的预编码向量中除该虚拟数据流使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
可选的，每个相位跟踪参考信号经过预编码后使用一个或多个天线组传输，且同一相位跟踪参考信号使用的一个或者多个天线组具有相同的相位噪声。
可选的，每个相位跟踪参考信号使用的预编码向量中除该相位跟踪参考信号使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
可选的，所述第二预编码矩阵的信息由所述发送端与所述接收端预先约定，或者处理器1500还用于：
通过收发机1510向所述接收端传输所述第二预编码矩阵的信息；或者
通过收发机1510向所述接收端传输所述第二预编码矩阵在数据带宽上使用的规则。
可选的，解调参考信号与相位跟踪参考信号的映射关系由所述发送端与所 述接收端预先约定，或者处理器1500还用于：
通过收发机1510向所述接收端传输解调参考信号与相位跟踪参考信号的映射关系。
可选的，所述解调参考信号与相位跟踪参考信号的映射关系，包括：
一个相位跟踪参考信号至少对应一个解调参考信号，具有对应关系的相位跟踪参考信号和解调参考信号使用相同的天线组进行传输；
相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相关，其中，相位跟踪参考信号对应的虚拟数据流为该相位参考信号对应的调解参考信号所对应的虚拟数据流。
可选的，若相位跟踪参考信号对应一个解调参考信号，则该相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相同；
若相位跟踪参考信号对应多个解调参考信号，则该相位跟踪参考信号使用的预编码向量由多个虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量经过运算后得到，所述多个虚拟数据流为所述多个解调参考信号对应的虚拟数据流。
需要说明的是，本实施例中上述发送端可以是本公开实施例中方法实施例中任意实施方式的发送端，本公开实施例中方法实施例中发送端的任意实施方式都可以被本实施例中的上述发送端所实现，以及达到相同的有益效果，此处不再赘述。
参见图16，图中示出一种接收端的结构，该接收端包括：处理器1600、收发机1610、存储器1620、用户接口2160和总线接口，其中：
处理器1600，用于读取存储器1620中的程序，执行下列过程：
通过收发机1610接收发送端传输的数据信号；
接收所述发送端传输的解调参考信号，并估计接收到的每个解调参考信号 的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到D个解调参考信号，其中，D为大于或者等于1的整数；
接收所述发送端传输的相位跟踪参考信号，并估计接收到的每个相位跟踪参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到M个相位跟踪参考信号，M为大于或者等于1的整数；
针对每个接收天线单元或者天线端口，基于该天线单元或者天线端口接收到M个相位跟踪参考信号，对接收到的D个解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
基于补偿信道估计矩阵与获取的第二预编码矩阵，获得信道信息，其中，所述补偿信道估计矩阵包括各接收天线单元或者天线端口接收到的各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
使用所述信道信息解调所述数据信号，得到用户数据。
其中，收发机1610，用于在处理器1600的控制下接收和发送数据，且收发机1610包括上述天线单元或者天线端口。
在图16中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1600代表的一个或多个处理器和存储器1620代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1610可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备，用户接口2160还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器1600负责管理总线架构和通常的处理，存储器1620可以存储处理器1600在执行操作时所使用的数据。
可选的，所述针对每个接收天线单元或者天线端口，基于该天线单元或者 天线端口接收到M个相位跟踪参考信号，对接收到的D个解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计，包括：
针对每个接收天线单元或者天线端口，根据获取的解调参考信号与相位跟踪参考信号的映射关系，确定该天线单元或者天线端口接收到的各相位跟踪参考信号对应的解调参考信号；
将各相位跟踪参考信号所估计的信道与各自对应的解调参考信号所估计的信道进行比较，得到各相位跟踪参考信号对应的相位变化信息；
使用各相位跟踪参考信号对应的相位变化信息，对各自对应的解调参考信号所估计的信道进行相位噪声补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计。
可选的，所述映射关系由所述发送端与所述接收端预先约定，或者处理器1600还用于：
通过收发机1610接收所述发送端传输的所述映射关系。
可选的，所述基于补偿信道估计矩阵与获取的第二预编码矩阵，获得信道信息，包括：
将所述补偿信道估计矩阵与获取的第二预编码矩阵相乘，得到信道信息。
可选的，所述第二预编码矩阵的信息由所述发送端与所述接收端预先约定，或者处理器1600还用于：
通过收发机1610接收所述发送端传输的所述第二预编码矩阵的信息；或者
通过收发机1610接收所述发送端传输的所述第二预编码矩阵在数据带宽上使用的规则，并基于所述规则获取所述第二预编码矩阵。
需要说明的是，本实施例中上述接收端可以是本公开实施例中方法实施例中任意实施方式的接收端，本公开实施例中方法实施例中接收端的任意实施方式都可以被本实施例中的上述接收端所实现，以及达到相同的有益效果，此处 不再赘述。
在本申请所提供的实施例中，应该理解到，所揭露方法和装置，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。另一点，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，可以是电性，机械或其它的形式。
另外，在本公开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包括，也可以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，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元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)执行本公开各个实施例所述收发方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，简称ROM)、随机存取存储器(Random Access Memory，简称RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述是本公开的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。

Claims (30)

  1. 一种参考信号的传输方法，包括：
    发送端使用第二预编码矩阵对用户数据的数据流进行预编码，得到D个虚拟数据流；
    所述发送端使用第一预编码矩阵对所述D个虚拟数据流进行预编码，并通过T个天线组向接收端传输预编码后的D个虚拟数据流，其中，每个天线组包括一个或者多个具有相同相位噪声的天线单元或者天线端口，T为大于或者等于1的整数，D为大于或者等于1的整数；
    所述发送端向所述接收端传输D个解调参考信号，其中，每个解调参考信号对应一个虚拟数据流，每个调解参考信号使用的预编码向量与对应的虚拟数据流在该解调参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相同，每个解调参考信号和对应的虚拟数据流使用相同的天线组传输；
    所述发送端向所述接收端传输M个相位跟踪参考信号，所述M个相位跟踪参考信号用于跟踪所述T个天线组中由一个或多个相位噪声源所引起的相位变化，M为大于或者等于1的整数。
  2. 如权利要求1所述的方法，其中，每个虚拟数据流经过预编码后使用一个或者多个天线组传输，且同一虚拟数据流使用的一个或者多个天线组具有相同的相位噪声。
  3. 如权利要求2所述的方法，其中，每个虚拟数据流使用的所述第一预编码矩阵中的预编码向量中除该虚拟数据流使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
  4. 如权利要求1-3中任一项所述的方法，其中，每个相位跟踪参考信号经过预编码后使用一个或多个天线组传输，且同一相位跟踪参考信号使用的一个或者多个天线组具有相同的相位噪声。
  5. 如权利要求4所述的方法，其中，每个相位跟踪参考信号使用的预编 码向量中除该相位跟踪参考信号使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
  6. 如权利要求1-3中任一项所述的方法，其中，所述第二预编码矩阵的信息由所述发送端与所述接收端预先约定，或者所述方法还包括：
    所述发送端向所述接收端传输所述第二预编码矩阵的信息；或者
    所述发送端向所述接收端传输所述第二预编码矩阵在数据带宽上使用的规则。
  7. 如权利要求1-3中任一项所述的方法，其中，解调参考信号与相位跟踪参考信号的映射关系由所述发送端与所述接收端预先约定，或者所述方法还包括：
    所述发送端向所述接收端传输解调参考信号与相位跟踪参考信号的映射关系。
  8. 如权利要求7所述的方法，其中，所述解调参考信号与相位跟踪参考信号的映射关系，包括：
    一个相位跟踪参考信号至少对应一个解调参考信号，具有对应关系的相位跟踪参考信号和解调参考信号使用相同的天线组进行传输；
    相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相关，其中，相位跟踪参考信号对应的虚拟数据流为该相位参考信号对应的调解参考信号所对应的虚拟数据流。
  9. 如权利要求8所述的方法，其中，
    若相位跟踪参考信号对应一个解调参考信号，则该相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相同；
    若相位跟踪参考信号对应多个解调参考信号，则该相位跟踪参考信号使用的预编码向量由多个虚拟数据流在该相位跟踪参考信号所在子载波上使用的 所述第一预编码矩阵中的预编码向量经过运算后得到，所述多个虚拟数据流为所述多个解调参考信号对应的虚拟数据流。
  10. 一种参考信号的传输方法，包括：
    接收端接收发送端传输的数据信号；
    所述接收端接收所述发送端传输的解调参考信号，并估计接收到的每个解调参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到D个解调参考信号，其中，D为大于或者等于1的整数；
    所述接收端接收所述发送端传输的相位跟踪参考信号，并估计接收到的每个相位跟踪参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到M个相位跟踪参考信号，M为大于或者等于1的整数；
    针对每个接收天线单元或者天线端口，所述接收端基于该天线单元或者天线端口接收到M个相位跟踪参考信号，对接收到的D个解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
    所述接收端基于补偿信道估计矩阵与获取的第二预编码矩阵，获得信道信息，其中，所述补偿信道估计矩阵包括各接收天线单元或者天线端口接收到的各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
    所述接收端使用所述信道信息解调所述数据信号，得到用户数据。
  11. 如权利要求10所述的方法，其中，所述针对每个接收天线单元或者天线端口，所述接收端基于该天线单元或者天线端口接收到M个相位跟踪参考信号，对接收到的D个解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计，包括：
    针对每个接收天线单元或者天线端口，所述接收端根据获取的解调参考信号与相位跟踪参考信号的映射关系，确定该天线单元或者天线端口接收到的各相位跟踪参考信号对应的解调参考信号；
    所述接收端将各相位跟踪参考信号所估计的信道与各自对应的解调参考 信号所估计的信道进行比较，得到各相位跟踪参考信号对应的相位变化信息；
    所述接收端使用各相位跟踪参考信号对应的相位变化信息，对各自对应的解调参考信号所估计的信道进行相位噪声补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计。
  12. 如权利要求11所述的方法，其中，所述映射关系由所述发送端与所述接收端预先约定，或者所述方法还包括：
    所述接收端接收所述发送端传输的所述映射关系。
  13. 如权利要求10-12中任一项所述的方法，其中，所述接收端基于补偿信道估计矩阵与获取的第二预编码矩阵，获得信道信息，包括：
    所述接收端将所述补偿信道估计矩阵与获取的第二预编码矩阵相乘，得到信道信息。
  14. 如权利要求13所述的方法，其中，所述第二预编码矩阵的信息由所述发送端与所述接收端预先约定，或者所述方法还包括：
    所述接收端接收所述发送端传输的所述第二预编码矩阵的信息；或者
    所述接收端接收所述发送端传输的所述第二预编码矩阵在数据带宽上使用的规则，并基于所述规则获取所述第二预编码矩阵。
  15. 一种发送端，包括：
    编码模块，用于使用第二预编码矩阵对用户数据的数据流进行预编码，得到D个虚拟数据流；
    第一传输模块，用于使用第一预编码矩阵对所述D个虚拟数据流进行预编码，并通过T个天线组向接收端传输预编码后的D个虚拟数据流，其中，每个天线组包括一个或者多个具有相同相位噪声的天线单元或者天线端口，T为大于或者等于1的整数，D为大于或者等于1的整数；
    第二传输模块，用于向所述接收端传输D个解调参考信号，其中，每个解调参考信号对应一个虚拟数据流，每个调解参考信号使用的预编码向量与对应的虚拟数据流在该解调参考信号所在子载波上使用的所述第一预编码矩阵 中的预编码向量相同，每个解调参考信号和对应的虚拟数据流使用相同的天线组传输；
    第三传输模块，用于向所述接收端传输M个相位跟踪参考信号，所述M个相位跟踪参考信号用于跟踪所述T个天线组中由一个或多个相位噪声源所引起的相位变化，M为大于或者等于1的整数。
  16. 如权利要求15所述的发送端，其中，每个虚拟数据流经过预编码后使用一个或者多个天线组传输，且同一虚拟数据流使用的一个或者多个天线组具有相同的相位噪声。
  17. 如权利要求16所述的发送端，其中，每个虚拟数据流使用的所述第一预编码矩阵中的预编码向量中除该虚拟数据流使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
  18. 如权利要求15-17中任一项所述的发送端，其中，每个相位跟踪参考信号经过预编码后使用一个或多个天线组传输，且同一相位跟踪参考信号使用的一个或者多个天线组具有相同的相位噪声。
  19. 如权利要求18所述的发送端，其中，每个相位跟踪参考信号使用的预编码向量中除该相位跟踪参考信号使用的一个或者多个天线组所对应的权值之外，其余天线组内的天线单元或者天线端口所对应的权值均为零。
  20. 如权利要求15-17中任一项所述的发送端，其中，所述第二预编码矩阵的信息由所述发送端与所述接收端预先约定，或者所述发送端还包括：
    第四传输模块，用于向所述接收端传输所述第二预编码矩阵的信息；或者
    第五传输模块，用于向所述接收端传输所述第二预编码矩阵在数据带宽上使用的规则。
  21. 如权利要求15-17中任一项所述的发送端，其中，解调参考信号与相位跟踪参考信号的映射关系由所述发送端与所述接收端预先约定，或者所述发送端还包括：
    第六传输模块，用于向所述接收端传输解调参考信号与相位跟踪参考信号的映射关系。
  22. 如权利要求21所述的发送端，其中，所述解调参考信号与相位跟踪参考信号的映射关系，包括：
    一个相位跟踪参考信号至少对应一个解调参考信号，具有对应关系的相位跟踪参考信号和解调参考信号使用相同的天线组进行传输；
    相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相关，其中，相位跟踪参考信号对应的虚拟数据流为该相位参考信号对应的调解参考信号所对应的虚拟数据流。
  23. 如权利要求22所述的发送端，其中，
    若相位跟踪参考信号对应一个解调参考信号，则该相位跟踪参考信号使用的预编码向量与对应的虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相同；
    若相位跟踪参考信号对应多个解调参考信号，则该相位跟踪参考信号使用的预编码向量由多个虚拟数据流在该相位跟踪参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量经过运算后得到，所述多个虚拟数据流为所述多个解调参考信号对应的虚拟数据流。
  24. 一种接收端，包括：
    第一接收模块，用于接收发送端传输的数据信号；
    第二接收模块，用于接收所述发送端传输的解调参考信号，并估计接收到的每个解调参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到D个解调参考信号，其中，D为大于或者等于1的整数；
    第三接收模块，用于接收所述发送端传输的相位跟踪参考信号，并估计接收到的每个相位跟踪参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到M个相位跟踪参考信号，M为大于或者等于1的整数；
    信道估计模块，用于针对每个接收天线单元或者天线端口，基于该天线单元或者天线端口接收到M个相位跟踪参考信号，对接收到的D个解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
    获取模块，用于基于补偿信道估计矩阵与获取的第二预编码矩阵，获得信道信息，其中，所述补偿信道估计矩阵包括各接收天线单元或者天线端口接收到的各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
    解调模块，用于使用所述信道信息解调所述数据信号，得到用户数据。
  25. 如权利要求24所述的接收端，其中，所述信道估计模块，包括：
    确定单元，用于针对每个接收天线单元或者天线端口，所述接收端根据获取的解调参考信号与相位跟踪参考信号的映射关系，确定该天线单元或者天线端口接收到的各相位跟踪参考信号对应的解调参考信号；
    信道估计单元，用于将各相位跟踪参考信号所估计的信道与各自对应的解调参考信号所估计的信道进行比较，得到各相位跟踪参考信号对应的相位变化信息；
    补偿单元，用于使用各相位跟踪参考信号对应的相位变化信息，对各自对应的解调参考信号所估计的信道进行相位噪声补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计。
  26. 如权利要求25所述的接收端，其中，所述映射关系由所述发送端与所述接收端预先约定，或者所述接收端还包括：
    第四接收模块，用于接收所述发送端传输的所述映射关系。
  27. 如权利要求24-26中任一项所述的接收端，其中，所述获取模块用于将所述补偿信道估计矩阵与获取的第二预编码矩阵相乘，得到信道信息。
  28. 如权利要求27所述的接收端，其中，所述第二预编码矩阵的信息由所述发送端与所述接收端预先约定，或者所述接收端还包括：
    第五接收模块，用于接收所述发送端传输的所述第二预编码矩阵的信息； 或者
    第六接收模块，用于接收所述发送端传输的所述第二预编码矩阵在数据带宽上使用的规则，并基于所述规则获取所述第二预编码矩阵。
  29. 一种发送端，包括处理器，通过总线接口与处理器相连接的存储器，以及通过总线接口与处理器相连接的收发机；
    所述处理器用于读取所述存储器中的程序以执行下列操作：
    使用第二预编码矩阵对用户数据的数据流进行预编码，得到D个虚拟数据流；
    使用第一预编码矩阵对所述D个虚拟数据流进行预编码，并通过T个天线组向接收端传输预编码后的D个虚拟数据流，其中，每个天线组包括一个或者多个具有相同相位噪声的天线单元或者天线端口，T为大于或者等于1的整数，D为大于或者等于1的整数；
    向所述接收端传输D个解调参考信号，其中，每个解调参考信号对应一个虚拟数据流，每个调解参考信号使用的预编码向量与对应的虚拟数据流在该解调参考信号所在子载波上使用的所述第一预编码矩阵中的预编码向量相同，每个解调参考信号和对应的虚拟数据流使用相同的天线组传输；
    向所述接收端传输M个相位跟踪参考信号，所述M个相位跟踪参考信号用于跟踪所述T个天线组中由一个或多个相位噪声源所引起的相位变化，M为大于或者等于1的整数；
    所述收发机用于接收和发送数据；
    所述存储器用于保存所述处理器执行操作时所使用的数据。
  30. 一种接收端，包括处理器，通过总线接口与处理器相连接的存储器，以及通过总线接口与处理器相连接的收发机；
    所述处理器用于读取所述存储器中的程序以执行下列操作：
    接收发送端传输的数据信号；
    接收所述发送端传输的解调参考信号，并估计接收到的每个解调参 考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到D个解调参考信号，其中，D为大于或者等于1的整数；
    接收所述发送端传输的相位跟踪参考信号，并估计接收到的每个相位跟踪参考信号的信道，其中，所述接收端每个接收天线单元或者天线端口均会接收到M个相位跟踪参考信号，M为大于或者等于1的整数；
    针对每个接收天线单元或者天线端口，基于该天线单元或者天线端口接收到M个相位跟踪参考信号，对接收到的D个解调参考信号所估计的信道进行相位补偿，得到各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
    基于补偿信道估计矩阵与获取的第二预编码矩阵，获得信道信息，其中，所述补偿信道估计矩阵包括各接收天线单元或者天线端口接收到的各解调参考信号在相位跟踪参考信号所在符号上的补偿信道估计；
    使用所述信道信息解调所述数据信号，得到用户数据；
    所述收发机用于接收和发送数据；
    所述存储器用于保存所述处理器执行操作时所使用的数据。
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EP3565161A1 (en) 2019-11-06
JP2019537373A (ja) 2019-12-19
EP3565161A4 (en) 2020-04-01
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CN108259143B (zh) 2020-02-28
JP6992065B2 (ja) 2022-01-13

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