WO2014194842A1 - Procédé et dispositif de transmission d'informations d'état de canal sur la base d'un livre de codes - Google Patents

Procédé et dispositif de transmission d'informations d'état de canal sur la base d'un livre de codes Download PDF

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Publication number
WO2014194842A1
WO2014194842A1 PCT/CN2014/079283 CN2014079283W WO2014194842A1 WO 2014194842 A1 WO2014194842 A1 WO 2014194842A1 CN 2014079283 W CN2014079283 W CN 2014079283W WO 2014194842 A1 WO2014194842 A1 WO 2014194842A1
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WIPO (PCT)
Prior art keywords
precoding matrix
codebook
compressed
matrix set
precoding
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Ceased
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PCT/CN2014/079283
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English (en)
Chinese (zh)
Inventor
张然然
苏昕
拉盖施
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Classifications

    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]

Definitions

  • the Long Term Evolution-Advanced (LTE-A) system supports 10 transmission modes and 4 physical uplink control channel (PUCCH) reporting modes.
  • the terminal User Equipment, UE; also referred to as the user equipment
  • the terminal periodically feeds back different channel shield identifiers on the PUCCH using the PUCCH reporting mode (Reporting Mode) as shown in Table 1.
  • CQI Channel Quality Indication
  • PMI Precoding Matrix Indication
  • RI Rank Indication
  • each transmission mode it supports the following PUCCH reporting mode:
  • Transmission mode 1 Mode 1-0 and mode 2-0.
  • Transmission mode 2 Mode 1-0 and mode 2-0.
  • Transmission mode 3 Mode 1-0 and mode 2-0.
  • Transmission mode 4 Mode 1-1 and mode 2-1.
  • Transmission mode 5 Mode 1-1 and mode 2-1.
  • Transmission mode 6 Mode 1-1 and Mode 2-1.
  • Transmission mode 7 Mode 1-0 and Mode 2-0.
  • Transmission mode 8 If the UE is configured to report PMI/RI, mode 1-1 and mode 2-1 are supported.
  • mode 1-0 and mode 2-0 are supported.
  • Transmission mode 9 If the UE is configured to report PMI/RI and the number of CSI-RS ports is greater than 1, the mode 1-1 and mode are supported.
  • mode 1 -0 and mode 2-0 are supported.
  • Transmission mode 10 If the UE is configured to report PMI/RI and the number of CSI-RS ports is greater than 1, the mode 1-1 and mode are supported.
  • mode 1 -0 and mode 2-0 are supported.
  • the reporting mode 1-1 is used for feedback RI, wideband PMI and wideband CQI.
  • the codebook of the 4-antenna port is enhanced in the new LTE-A version (R12, Release-12). Possible enhancements to the codebook include: Codebook enhancement scheme 1
  • the codebook of the existing 4-antenna port is still used.
  • users of the new version (R12) in the LTE-A system may also choose to use the enhanced codebook for feedback of channel state information.
  • the enhanced codebook and the existing codebook use different codebook structures, which are embodied in: in the existing codebook, one codebook index corresponds to one precoding matrix, and the enhanced codebook uses two codebook indexes.
  • a precoding matrix in the enhanced codebook needs to be determined by a pair of codebook indexes (recorded as the first codebook index and the second codebook index), and therefore, the existing PUCCHModel-1 cannot be supported.
  • the user uses the enhanced codebook for feedback of RI, wideband PMI, wideband CQI, and subband CQI.
  • the embodiments of the present invention provide a method and a device for transmitting channel state information based on a codebook, which are used to solve the problem that the channel state information is not based on the enhanced codebook in the case of a 4-antenna port.
  • the problem with the program is not based on the enhanced codebook in the case of a 4-antenna port.
  • An embodiment of the present application provides a method for sending channel state information based on a codebook, including:
  • the terminal After receiving the indication information sent by the base station, the terminal determines the rank indication RI and the used precoding matrix from the compressed 4 antenna codebook;
  • the terminal sends the determined joint coding value to the base station at a set feedback moment according to the feedback mode indicated in the indication information, and is used to indicate the precoding at another set feedback moment.
  • the second PMI of the second codebook index of the matrix and the channel shield quantity indication CQI are sent to the base station;
  • the 4 antenna codebook is a codebook for performing precoding matrix indication feedback and including a first codebook index and a second codebook index, and a value range of the first codebook index. 0 N-1 , where N is an integer greater than 1; the compressed 4 antenna codebook is obtained by compressing a first precoding matrix set corresponding to the first codebook index in the 4 antenna codebook. a codebook formed by the compressed first precoding matrix set and the second precoding matrix set corresponding to the second codebook index, where the compressed first precoding matrix set includes the first precoding before compression A partial precoding matrix in a matrix set.
  • the compressed first precoding matrix set is:
  • Manner 1 The precoding matrix in the first precoding matrix set before compression is divided into groups, wherein each of the two precoding matrices included in the group has the same discrete Fourier transform DFT vector; Arbitrarily selecting one of the coding matrices as a precoding matrix in the compressed first precoding matrix set;
  • Manner 2 The precoding matrix in the first precoding matrix set before compression is divided into groups, wherein a first column DFT vector of two precoding matrices included in each group is an adjacent DF T vector; One of the precoding matrices is arbitrarily selected as the precoding matrix in the compressed first precoding matrix set.
  • the compressed first precoding matrix set uses the following structure:
  • Method 3 arbitrarily selecting a part of the precoding matrix in the compressed first precoding matrix set, and selecting the pre The coding matrix is used as a precoding matrix in the final compressed first precoding matrix set.
  • the compressed 4-antenna codebook uses the following structure:
  • the first pre-coding matrix set corresponding to the first codebook index in the codebook of rank 1 is the compressed one.
  • the first precoding matrix set corresponding to the first codebook index in the codebook of rank 2 is the compressed first precoding matrix set.
  • the number of the index is the same as the number of precoding matrices included in the compressed first precoding matrix set, and each joint encoding value corresponds to a different first codebook index.
  • An embodiment of the present application provides a method for receiving channel state information based on a codebook, including:
  • the base station sends the indication information to the terminal, where the indication information is used to indicate that the terminal feeds back the channel state information and the feedback mode used by the current feedback;
  • the 4 antenna codebook is a codebook for performing precoding matrix indication information feedback and includes a first codebook index and a second codebook index, and the value of the first codebook index is used in the configuration of the four pilot ports.
  • the range is 0 N-1 , where N is an integer greater than 1.
  • the compressed 4 antenna codebook refers to compressing the first precoding matrix set corresponding to the first codebook index in the 4 antenna codebook. Obtaining, by the compressed first precoding matrix set and the second precoding matrix set corresponding to the second codebook index, the compressed first precoding matrix set includes the first pre-compression A partial precoding matrix in a set of coding matrices.
  • the compressed first precoding matrix set uses the following structure:
  • Manner 1 The precoding matrix in the first precoding matrix set before compression is divided into groups, wherein each of the two precoding matrices included in the group has the same discrete Fourier transform DFT vector; Arbitrarily selecting one of the coding matrices as a precoding matrix in the compressed first precoding matrix set;
  • Manner 2 The precoding matrix in the first precoding matrix set before compression is divided into groups, wherein a first column DFT vector of two precoding matrices included in each group is an adjacent DF T vector; One of the precoding matrices is arbitrarily selected as the precoding matrix in the compressed first precoding matrix set.
  • the compressed first precoding matrix set uses the following structure:
  • Manner 3 arbitrarily select a partial precoding matrix in the compressed first precoding matrix set, and use the selected precoding matrix as a precoding matrix in the final compressed first precoding matrix set.
  • the compressed 4-antenna codebook uses the following structure:
  • the first precoding matrix set corresponding to the first codebook index in the codebook with rank 1 is the compressed first a set of precoding matrices; and/or,
  • the first precoding matrix set corresponding to the first codebook index in the codebook of rank 2 is the compressed first precoding matrix set.
  • the number of the index is the same as the number of precoding matrices included in the compressed first precoding matrix set, and each joint encoding value corresponds to a different first codebook index.
  • An embodiment of the present application provides a terminal, including:
  • a first determining module configured to: after receiving the indication information sent by the base station, determine the RI and the used precoding matrix from the compressed 4-antenna codebook;
  • a second determining module configured to determine, according to the set joint coding rule, a joint code value corresponding to the first precoding matrix indicating PMI of the first codebook index indicating the first codebook matrix of the precoding matrix;
  • a feedback module configured to send, according to the feedback mode indicated in the indication information, the determined joint coding value to the base station at a set feedback moment, and at another set feedback moment, to indicate the a second PMI of the second codebook index of the precoding matrix and a channel shield indicating that the CQI is sent to the base station;
  • the 4 antenna codebook is a codebook for performing precoding matrix indication feedback and including a first codebook index and a second codebook index, and a value range of the first codebook index. 0 N-1 , where N is an integer greater than 1; the compressed 4 antenna codebook is obtained by compressing a first precoding matrix set corresponding to the first codebook index in the 4 antenna codebook. a codebook formed by the compressed first precoding matrix set and the second precoding matrix set corresponding to the second codebook index, where the compressed first precoding matrix set includes the first precoding before compression A partial precoding matrix in a matrix set.
  • the compressed first precoding matrix set uses the following structure:
  • Manner 1 The precoding matrix in the first precoding matrix set before compression is divided into groups, wherein each of the two precoding matrices included in the group has the same discrete Fourier transform DFT vector; Arbitrarily selecting one of the coding matrices as a precoding matrix in the compressed first precoding matrix set;
  • Manner 2 The precoding matrix in the first precoding matrix set before compression is divided into groups, wherein a first column DFT vector of two precoding matrices included in each group is an adjacent DF T vector; One of the precoding matrices is arbitrarily selected as the precoding matrix in the compressed first precoding matrix set.
  • the compressed first precoding matrix set uses the following structure:
  • Manner 3 arbitrarily select a partial precoding matrix in the compressed first precoding matrix set, and use the selected precoding matrix as a precoding matrix in the final compressed first precoding matrix set.
  • the compressed 4-antenna codebook uses the following structure:
  • the first precoding matrix set corresponding to the first codebook index in the codebook of rank 1 is the compressed one.
  • the first precoding matrix set corresponding to the first codebook index in the codebook of rank 2 is the compressed first precoding matrix set.
  • the number of the index is the same as the number of precoding matrices included in the compressed first precoding matrix set, and each joint encoding value corresponds to a different first codebook index.
  • the embodiment of the present application provides another terminal, where the terminal at least includes: a memory, a processor, and an antenna, where: the memory stores at least a compressed 4-antenna codebook, and a set joint coding rule;
  • the antenna receives the indication information sent by the base station, and triggers the processor to perform feedback of the channel state information
  • the processor determines, under the trigger of the antenna, the RI and the precoding matrix used from the compressed 4-antenna codebook stored in the memory; determining the RI according to the joint coding rule stored in the memory, and And indicating a joint coding value corresponding to the first PMI of the first codebook index of the precoding matrix, and indicating the joint coding determined by the antenna at the set feedback moment according to the feedback mode indicated in the indication information received by the antenna
  • the value is sent to the base station, and at another set feedback moment, the second PMI and CQI for indicating the second codebook index of the precoding matrix are sent to the base station.
  • the 4 antenna codebook is a codebook for performing precoding matrix indication information feedback and includes a first codebook index and a second codebook index, and the value of the first codebook index is used in the configuration of the four pilot ports.
  • the range is 0 N-1 , where N is an integer greater than 1; the compressed 4 antenna codebook is obtained by compressing the first precoding matrix set corresponding to the first codebook index in the 4 antenna codebook. a codebook formed by the compressed first precoding matrix set and the second precoding matrix set corresponding to the second codebook index, where the compressed first precoding matrix set includes the first precoding matrix set before compression Partial precoding matrix in .
  • An embodiment of the present application provides a base station, including:
  • a sending module configured to send, to the terminal, indication information, where the indication information is used to indicate that the terminal feeds back channel state information and a feedback mode used by the current feedback;
  • a receiving module configured to receive, according to the feedback mode, a joint coded value of the RI and the first PMI sent by the terminal at a set feedback moment, and receive the sent by the terminal at another set feedback moment a second PMI and a CQI indicating a second codebook index of the precoding matrix in the compressed 4 antenna codebook;
  • a processing module configured to determine, according to the set joint coding rule, an RI corresponding to the received joint code value and a first codebook index of the precoding matrix
  • the 4 antenna codebook is a codebook for performing precoding matrix indication information feedback and includes a first codebook index and a second codebook index, and the value of the first codebook index is used in the configuration of the four pilot ports.
  • the range is 0 N-1 , where N is an integer greater than 1.
  • the compressed 4 antenna codebook refers to compressing the first precoding matrix set corresponding to the first codebook index in the 4 antenna codebook. Obtaining, by the compressed first precoding matrix set and the second precoding matrix set corresponding to the second codebook index, the compressed first precoding matrix set includes the first pre-compression A partial precoding matrix in a set of coding matrices.
  • the compressed first precoding matrix set uses the following structure:
  • Manner 1 The precoding matrix in the first precoding matrix set before compression is divided into groups, wherein each of the two precoding matrices included in the group has the same discrete Fourier transform DFT vector; Arbitrarily selecting one of the coding matrices as a precoding matrix in the compressed first precoding matrix set;
  • Manner 2 The precoding matrix in the first precoding matrix set before compression is divided into groups, wherein a first column DFT vector of two precoding matrices included in each group is an adjacent DF T vector; One of the precoding matrices is arbitrarily selected as the precoding matrix in the compressed first precoding matrix set.
  • the compressed first precoding matrix set uses the following structure:
  • Manner 3 arbitrarily select a partial precoding matrix in the compressed first precoding matrix set, and use the selected precoding matrix as a precoding matrix in the final compressed first precoding matrix set.
  • the compressed 4-antenna codebook uses the following structure: a first precoding matrix set corresponding to the first codebook index in the codebook of rank 1 is a compressed first precoding matrix set; and/or,
  • the first precoding matrix set corresponding to the first codebook index in the codebook of rank 2 is the compressed first precoding matrix set.
  • the number of the index is the same as the number of precoding matrices included in the compressed first precoding matrix set, and each joint encoding value corresponds to a different first codebook index.
  • An embodiment of the present application provides another base station, where the base station includes at least: a memory, a processor, and an antenna, where: the memory stores at least a compressed 4-antenna codebook, and a set joint coding rule;
  • the antenna sends the indication information to the terminal, where the indication information is used to indicate the feedback channel status information of the terminal and the feedback mode used in the current feedback, and is triggered by the processor according to the feedback mode.
  • a predetermined feedback moment, the joint code value of the RI and the first PMI sent by the receiving terminal, and the second codebook sent by the terminal for indicating the precoding matrix in the compressed 4-antenna codebook at another set feedback moment The second PMI of the index and
  • the processor determines, according to the set joint coding rule stored in the memory 61, the RI corresponding to the received joint code value and the first codebook index, and further, the compressed 4 antennas stored in the memory.
  • the codebook the received first codebook index and the precoding matrix corresponding to the second codebook index are determined.
  • the 4 antenna codebook is a codebook for performing precoding matrix indication information feedback and includes a first codebook index and a second codebook index, and the value of the first codebook index is used in the configuration of the four pilot ports.
  • the range is 0 N-1 , where N is an integer greater than 1; the compressed 4 antenna codebook is obtained by compressing the first precoding matrix set corresponding to the first codebook index in the 4 antenna codebook. a codebook formed by the compressed first precoding matrix set and the second precoding matrix set corresponding to the second codebook index, where the compressed first precoding matrix set includes the first precoding matrix set before compression Partial precoding matrix in .
  • the terminal after receiving the indication information sent by the base station, the terminal determines the RI and the used precoding matrix from the compressed 4 antenna codebook; and determines the RI according to the set joint coding rule. Generating a joint code value corresponding to the first PMI of the first codebook index of the precoding matrix; and transmitting, according to the feedback mode indicated in the indication information, the determined joint code value to the base station, and Transmitting, to the base station, a second PMI and a CQI for indicating a second codebook index of the precoding matrix;
  • the base station sends indication information to the terminal to indicate the feedback status information of the channel and the feedback used in the feedback.
  • the feedback mode at the set feedback moment, the joint encoding value of the RI and the first PMI sent by the receiving terminal is received, and the second PMI and CQI sent by the terminal are received at another set feedback moment; Determining a joint coding rule, determining an RI corresponding to the received joint code value and a first codebook index;
  • the method and device for transmitting channel state information implements the 4-antenna port case, based on the enhanced 4-antenna codebook and the corresponding relationship defined in the set joint coding rule.
  • the codebook performs feedback of channel state information.
  • FIG. 1 is a schematic flowchart of a method for transmitting channel state information based on a codebook according to an embodiment of the present disclosure
  • FIG. 2 is a schematic flowchart of a method for receiving channel state information based on a codebook according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of a first base station according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a second terminal according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a second base station according to an embodiment of the present application. detailed description
  • PUCCH reporting mode 1-1 further supports the following two submodes (Submode):
  • Submode l Contains 2 types of report types: report type 5 for feedback RI and first PMI; report type 2b for feedback CQI and second PMI;
  • Submode 2 Contains 2 types of report types: report type 3 for feedback RI; report type 2c for feedback CQI, first PMI and second PMI.
  • the precoding matrix in the enhanced codebook is obtained by each precoding matrix in the first precoding matrix set corresponding to the first PMI and the second precoding matrix set corresponding to the second PMI.
  • Each precoding matrix is formed according to a set enhancement scheme, and the number of precoding matrices included in the enhanced codebook is the number of precoding matrices included in the first precoding matrix set.
  • the precoding matrix set includes The number of coding matrices, and each precoding matrix in the enhanced codebook needs to be determined by a first PMI and a second PMI.
  • the existing PUCCH mode 1-1 cannot support the use of the enhanced codebook for RI, wideband PMI (including the first PMI and the second PMI), wideband CQI, and subband CQI feedback; a method similar to the 8-antenna port can be used.
  • Submode 1 and Submode 2 are also supported in the case of a 4-antenna port.
  • the PUCCH mode 1-1 of the 8-antenna port is The feedback method of submode 1 cannot be directly applied to the feedback of the 4-antenna port.
  • the embodiment of the present application provides a method and a device for transmitting channel state information based on a codebook, which are used to solve the problem of channel state information feedback based on the enhanced codebook in the case of a 4-antenna port.
  • the PUCCH uplink mode 1-1 also supports the sub-mode 1 of the PUCCH uplink mode 1-1 similar to the 8-antenna port, that is, the report including the joint coding value of the feedback RI and the first PMI.
  • Type and a report type that feeds back the second PMI and CQI, using the above mode period 3 ⁇ 4RI, first PMI, second PMI, and CQI.
  • the joint code value of the RI and the first PMI is erroneous in the feedback process, which may cause an error in feeding back the second PMI and CQI in the next feedback cycle.
  • the codebook of the 4-antenna port needs to be compressed, so that the number of information bits after the joint encoding of the RI and the first PMI does not exceed the error rate that the system can tolerate. The number of bits.
  • the structure of the above-mentioned four-antenna codebook is only a preferred implementation for convenience of description, and is not a limitation on the structure of the 4-antenna codebook.
  • the first codebook index in the 4-antenna codebook Between the precoding matrix, and/or the second codebook index and the precoding matrix, another corresponding order may be used to change the precoding matrix and the first codebook index, and the precoding matrix and the fourth antenna codebook.
  • the corresponding order of the two codebook indexes does not affect the performance of the four antenna codebook.
  • the codebook compression schemes provided by the embodiments of the present application are based on the first codebook index and the precoding matrix shown in Tables 3A to 3B and Tables 4A to 4B above, and the second codebook index. Designed with the corresponding order between precoding matrices. For a codebook compression scheme, if the corresponding order between the first codebook index and the precoding matrix between the pre-compression codebook and the second codebook index and the precoding matrix is changed, the compression of the corresponding codebook compression scheme is obtained. The value of the first codebook index should be adjusted accordingly, but it should still be considered as the same codebook compression scheme;
  • an embodiment of the present application provides a method for sending channel state information based on a codebook, where the method includes:
  • Step 11 After receiving the indication information sent by the base station, the terminal determines the RI and the used precoding matrix from the compressed 4-antenna codebook.
  • the indication information is used to indicate that the terminal performs feedback of channel state information, and indicates a feedback mode used by the feedback.
  • the indication information can be sent by using control signaling (Downlink Control Information (DCI)).
  • DCI Downlink Control Information
  • the terminal may determine the RI and the precoding matrix used from the compressed 4-antenna codebook according to the transmission characteristics and/or the terminal capability.
  • Step 12 The terminal determines, according to the set joint coding rule, a joint code value corresponding to the first PMI that is used to indicate the first codebook index of the precoding matrix.
  • the joint coding rule defines a correspondence between a joint coding value (denoted as ⁇ i) corresponding to the first PMI, RI, and a first codebook index of the precoding matrix in the compressed 4-antenna codebook. Relationship, the first PMI is used to refer to The first codebook index of the precoding matrix in the compressed 4-antenna codebook is shown, and is in one-to-one correspondence with the first codebook index of the precoding matrix in the compressed 4-antenna codebook.
  • Step 13 The terminal sends the determined joint coding value to the base station at the set feedback moment according to the feedback mode indicated in the indication information, and sets the second PMI and CQI of the precoding matrix at another set feedback moment. Send to the base station.
  • the second PMI is used to indicate a second codebook index of the precoding matrix in the compressed 4-antenna codebook, and the second codebook of the precoding matrix in the compressed 4-antenna codebook is -correspond.
  • the 4-antenna codebook refers to a codebook for performing precoding matrix indication information feedback and including a first codebook index and a second codebook index, and a first codebook.
  • the value of the index is 0 N-1, where N is an integer greater than 1.
  • the compressed 4 antenna codebook refers to compressing the first precoding matrix set corresponding to the first PMI in the 4 antenna codebook.
  • the obtained codebook, and the compressed first precoding matrix set includes a partial precoding matrix in the first precoding matrix set before compression.
  • the compressed 4-antenna codebook in the embodiment of the present application is a second pre-coding matrix set corresponding to the compressed first pre-coding matrix set and the second codebook index, and the set codebook enhancement scheme is used.
  • the obtained 4-antenna codebook includes a partial precoding matrix in the 4-antenna codebook before compression.
  • the antenna codebook in order to reduce the number of bits corresponding to the joint coding value of the RI and the first PMI, compress the first precoding matrix set corresponding to the first codebook index in the 4-antenna codebook, so that the compressed based 4
  • the total number of joint coding values of the RI and the first PMI determined by the antenna codebook is not more than 2 N , where N is the number of transmission bits corresponding to the error rate that the system can tolerate;
  • the compressed first precoding matrix set includes a partial precoding matrix in the first precoding matrix set before compression, that is, the compressed precoding matrix set includes a precoding matrix that is still compressed. a precoding matrix in the first precoding matrix set, except that the compressed first precoding matrix set includes a precoding matrix that is smaller than a precoding matrix included in the first precoding matrix set before compression, so that The total number of joint coding values of the RI and the first PMI determined based on the compressed 4-antenna codebook is not more than 2 N ;
  • the first precoding matrix set corresponding to the first codebook I in the codebook of rank 1 in the 4-antenna codebook is compressed to include only 15 precoding matrices, and the codebook of rank 2
  • the first precoding matrix set corresponding to one codebook index is compressed to include only 15 precoding matrices, and the RI determined based on the compressed 4 antenna codebook is combined with the first PMI.
  • the total number of encoded values can be at least 31, only 5 bits are required;
  • the first precoding matrix set corresponding to the first codebook 1 in the codebook of rank 1 in the 4-antenna codebook is compressed to include only 8 precoding matrices, and the first in the codebook with rank 2
  • the first precoding matrix set corresponding to the codebook I is compressed to include only 8 precoding matrices, and the total number of joint coding values of the RI and the first PMI determined based on the compressed 4 antenna codebook may be the minimum. For 18, only 5 bits are required; and so on.
  • the compressed first precoding matrix set uses any of the following preferred structures:
  • Manner 1 The precoding matrix in the first precoding matrix set before compression is divided into groups, wherein each group includes precoding matrices having the same Discrete Fourier Transform (DFT) vector; One of the precoding matrices is arbitrarily selected as a precoding matrix in the compressed first precoding matrix set.
  • DFT Discrete Fourier Transform
  • N is an even number.
  • each precoding matrix in each group may be different in different precoding matrices.
  • the codebook compression scheme of the mode 1 is specifically:
  • each group includes a precoding matrix with a first codebook index of n and a precoding matrix with a first codebook index of "+ ⁇ , n
  • the range of values is
  • the compressed first precoding matrix set includes all selected precoding matrices
  • the precoding matrix in the first precoding matrix set before compression is divided into eight groups, each group includes a precoding matrix with a first codebook index of n and a first codebook.
  • the codebook enhancement scheme 1 or the codebook enhancement scheme 2 is used, the first precoding matrix corresponding to the nth first codebook index and the n+8th first in the enhanced codebook
  • the set of column vectors included in the first precoding matrix corresponding to the codebook index is the same, except that the order of the columns is different, as follows:
  • the first codebook index is n and the first codebook index is n+8.
  • the precoding matrix is as shown in Table 5A and Table 5B:
  • the first codebook index is n 0 1 2 3 4 5 6 7
  • the first codebook index is n
  • the compressed first precoding matrix set The precoding matrix of the first codebook index in the first precoding matrix set before compression is included.
  • the 4-antenna codebook formed by the codebook enhancement scheme 1 or the codebook enhancement scheme 2 can be compressed into the structure shown in Table 6A:
  • the first codebook index in the compressed 4-antenna codebook may follow the first codebook index corresponding to the precoding matrix in the first precoding matrix set before compression, as in the compressed 4 in Table 6B.
  • the first codebook index in the antenna codebook is 8 ⁇ 15, and the precoding matrix included in the compressed first precoding matrix set may be renumbered (ie, the first codebook index corresponding to each precoding matrix is redefined) If the first codebook index in the compressed 4-antenna codebook is 0-8, it is sufficient to ensure that the terminal and the base station have the same understanding of the first codebook index in the compressed 4-antenna codebook.
  • the first codebook index is n and the first codebook index is n+8.
  • the precoding matrix included in Table 7A and Table 7B is as follows: Table 7A: The first codebook index is n, and the codebook enhancement scheme 1 is used.
  • Table 7B The first codebook index is n+8, and the codebook enhancement scheme 1 is used: 6 7 0 1
  • the compressed first precoding matrix set includes a precoding matrix with a first codebook index of the first precoding matrix set before compression.
  • the 4-antenna codebook formed by the codebook enhancement scheme 1 can be compressed into the structure shown in Table 8A: Table 8A
  • the 4-antenna codebook formed by the codebook enhancement scheme 2 can be compressed into the structure shown in Table 8B:
  • the first codebook index in the first precoding matrix set is! ⁇ ⁇ (Ni) precoding matrix.
  • the first codebook index in the compressed 4-antenna codebook may follow the first codebook index corresponding to the precoding matrix in the first precoding matrix set before compression, or may be the first compressed pair.
  • the precoding matrix included in the precoding matrix set is renumbered (ie, the first codebook index corresponding to each precoding matrix is redefined), for example, the first codebook index in the compressed 4 antenna codebook is 0-8, as long as It is ensured that the terminal and the base station have the same understanding of the first codebook index in the compressed 4-antenna codebook.
  • the first codebook index in the compressed 4-antenna codebook corresponds to a set of precoding matrices including 8 precoding matrices, such as:
  • DFT Discrete Fourier Transform
  • Manner 2 The precoding matrix in the first precoding matrix set before compression is divided into groups, wherein the first column DFT vector of the two precoding matrices in each group is an adjacent DFT vector; from each group of precoding matrices Any one of them is selected as the precoding matrix in the compressed first precoding matrix set.
  • N is an even number.
  • the so-called adjacent DFT vector refers to two DFT vectors in which 1/32 takes two adjacent values and obtains t, such as V, based on Table 3 ⁇ , Table 3 ⁇ , Table 4 ⁇ , and Table 4 ⁇
  • the compressed first precoding matrix set includes a precoding matrix in which the first codebook index in the first precoding matrix set before compression is an even or odd number;
  • the enhanced codebook takes the precoding matrix with the first codebook index as an even number (or the precoding matrix with the first codebook index as an odd number).
  • the quantized beam direction can be uniformly thinned out. Therefore, the compressed 4-antenna codebook (ie, the two-pair 4-antenna codebook is compressed in the dual mode) and the four-antenna before compression are used in the dual-polarized array.
  • the codebook has minimal impact on the first and second feedback performance.
  • the 4-antenna codebook formed by the codebook enhancement scheme 1 or the codebook enhancement scheme 2 can be compressed as shown in Table 9A or as shown in Table 9B.
  • Table 9A the 4-antenna codebook formed by the codebook enhancement scheme 1 or the codebook enhancement scheme 2 can be compressed as shown in Table 9A or as shown in Table 9B.
  • Table 9B The structure shown:
  • the 4-antenna codebook formed by the codebook enhancement scheme 1 can be compressed into the structure shown in Table 10A:
  • the 4-antenna codebook formed by the codebook enhancement scheme 1 can be compressed to include only the precoding of the first codebook index in the first precoding matrix set before compression.
  • the structure of the matrix is similar to the structure shown in Table 10A, and is no longer listed here.
  • the 4-antenna codebook formed by the codebook enhancement scheme 2 can be compressed into the structure shown in Table 10B:
  • the 4-antenna codebook formed by the codebook enhancement scheme 2 can be compressed to include only the precoding of the first codebook index in the first precoding matrix set before compression.
  • the structure of the matrix is similar to that shown in Table 10B, and is no longer listed here.
  • the first codebook index in the compressed 4-antenna codebook may use the first codebook index corresponding to the precoding matrix in the first precoding matrix set before compression, as in the compressed 4-antenna codebook.
  • the first codebook index is 0, 2, 4, ..., 14 or 1, 3, 5, ..., 15 , and may also be included in the compressed first precoding matrix set.
  • the precoding matrix is renumbered (ie, the first codebook index corresponding to each precoding matrix is redefined), for example, the first codebook index in the compressed 4 antenna codebook is 0-8, as long as the terminal and the base station are guaranteed
  • the understanding of the first codebook index in the compressed 4-antenna codebook is the same.
  • the first codebook index in the compressed 4-antenna codebook corresponds to a set of precoding matrices including 8 precoding matrices, such as:
  • the number of information bits of the joint coding value of the RI and the first frame may be further reduced, for example, the number of information bits of the joint coded value of the RI and the first frame is reduced to 4 bits, preferably,
  • the compressed first precoding matrix set can also use the following preferred structure:
  • Manner 3 arbitrarily select a partial precoding matrix in the first precoding matrix set after compression, and use the selected precoding matrix as a preamble in the final compressed first precoding matrix set. Encoding matrix.
  • the first precoding matrix set compressed by the first mode is further compressed to obtain the structure shown in Table 11A, wherein the codebook enhancement scheme 1 or 2 is used;
  • the compressed 4-antenna codebook uses the following structure:
  • the first precoding matrix set corresponding to the first codebook index in the codebook of rank 1 is a compressed first precoding matrix set; and/or,
  • the first precoding matrix set corresponding to the first codebook index in the codebook of rank 2 is the compressed first precoding matrix set.
  • the codebook of rank 1 is compressed by any one of the foregoing manners 1 to 3, and the codebook of rank 2 is not compressed;
  • the codebook of rank 1 is compressed by any one of the foregoing manners 1 to 3
  • the codebook of rank 2 is compressed by any one of the foregoing manners 1 to 3.
  • the codebook of rank 1 is uncompressed, and the codebook of rank 2 is compressed by any of the above methods 1 to 3.
  • the terminal determines, according to the set joint coding rule, a joint coding value corresponding to the first PMI of the first codebook index indicating the precoding matrix, where the joint coding rule is set.
  • the corresponding joint coding rules are as shown in Table 12B:
  • codebook compression schemes are listed above.
  • the structure of the compressed 4-antenna codebook used by the terminal and the base station may be determined by the terminal. After the base station is notified, the terminal may also notify the terminal after determining by the base station, and may also be agreed by the terminal and the base station, and may also be specified in the protocol or the standard, as long as the compressed 4-antenna codebook used between the terminal and the base station can be guaranteed.
  • the structure can be understood consistently;
  • the set joint coding rule may be notified by the terminal to notify the base station, or may be notified by the base station to notify the terminal, or may be agreed by the terminal and the base station, or may be specified in a protocol or a standard, as long as the terminal and the base station can be guaranteed It is sufficient to understand the set joint coding rules.
  • the embodiment of the present application further provides a method for receiving channel state information based on a codebook.
  • the method includes:
  • Step 21 The base station sends the indication information to the terminal, where the indication information is used to indicate that the terminal feeds back the channel state information and the feedback mode used by the feedback.
  • the indication information can be sent by using control signaling (such as DCI).
  • control signaling such as DCI
  • Step 22 The base station receives, according to the feedback mode, a joint coding value of the RI and the first PMI sent by the terminal at the set feedback time, and receives the compressed 4 antenna code code sent by the terminal at another feedback time. a second PMI and CQI of the second codebook index of the precoding matrix;
  • Step 23 The base station determines, according to the set joint coding rule, an RI corresponding to the received joint code value and a first codebook index of the precoding matrix.
  • the joint coding rule defines a joint coding value of the RI and the first PMI / ⁇ / 3 ⁇ 4 ⁇ , RI, and a first codebook index ( ⁇ ) of the precoding matrix in the compressed 4-antenna codebook. Correspondence relationship.
  • the base station may determine the terminal recommendation from the compressed 4-antenna codebook. Precoding matrix.
  • the 4-antenna codebook refers to a codebook for performing precoding matrix indication information feedback and including a first codebook index and a second codebook index, and a first codebook.
  • the value of the index is 0 N-1, where ⁇ is an integer greater than 1.
  • the compressed 4-antenna codebook refers to the first precoding matrix set corresponding to the first codebook index in the 4-antenna codebook.
  • a codebook formed by the compressed first precoding matrix set and the second precoding matrix set corresponding to the second codebook index, and the compressed first precoding matrix set includes a pre-compression A partial precoding matrix in a precoding matrix set.
  • the compressed first precoding matrix set uses any of the following preferred structures:
  • Manner 1 The precoding matrix in the first precoding matrix set before compression is divided into groups, wherein each of the two precoding matrices included in the group has the same discrete Fourier transform DFT vector; the precoding matrix included from each group The arbitrarily selected one is used as the precoding matrix in the compressed first precoding matrix set. For details, refer to the description on the terminal side, and details are not described herein again.
  • Manner 2 The precoding matrix in the first precoding matrix set before compression is divided into groups, wherein the first column DFT vector of the two precoding matrices included in each group is an adjacent DFT vector; pre-programmed from each group; For details, refer to the description on the terminal side, and details are not mentioned here.
  • N is an even number.
  • the number of information bits of the joint coding value of the RI and the first PMI may be further reduced, for example, the number of information bits of the joint coding value of the RI and the first PMI is reduced to 4 bits, preferably,
  • the compressed first precoding matrix set can also use the following preferred structure:
  • Manner 3 arbitrarily select a partial precoding matrix in the compressed first precoding matrix set, and use the selected precoding matrix as a precoding matrix in the final compressed first precoding matrix set. For details, refer to the description on the terminal side. I will not repeat them here.
  • the compressed 4-antenna codebook uses the following structure:
  • the first precoding matrix set corresponding to the first codebook index in the codebook of rank 1 is a compressed first precoding matrix set; and/or,
  • the first precoding matrix set corresponding to the first codebook index in the codebook of rank 2 is the compressed first precoding matrix set.
  • the codebook of rank 1 is compressed by any one of the foregoing methods 1 to 3, and the codebook of rank 2 is not compressed;
  • the codebook of rank 1 is compressed by any one of the foregoing manners 1 to 3
  • the codebook of rank 2 is compressed by any one of the foregoing manners 1 to 3.
  • the codebook of rank 1 is uncompressed, and the codebook of rank 2 is compressed by any of the above methods 1 to 3.
  • the above method processing flow can be implemented by a software program, which can be stored in a storage medium shield, and when the stored software program is called, the above method steps are performed.
  • a terminal is provided in the embodiment of the present application.
  • the principle of solving the problem is similar to the method for sending the channel state information based on the codebook. Therefore, the implementation of the terminal can refer to the codebook-based channel. The implementation of the method of transmitting the status information will not be repeated here.
  • the terminal provided by the embodiment of the present application includes:
  • the first determining module 31 is configured to: after receiving the indication information sent by the base station, determine the RI and the used precoding matrix from the compressed 4-antenna codebook;
  • a second determining module 32 configured to determine, according to the set joint coding rule, a joint code value that is determined by the first determining module 31 and a first PMI that is used to indicate a first codebook index of the precoding matrix;
  • the feedback module 33 is configured to send, according to the feedback mode indicated in the indication information, the determined joint coding value to the base station at the set feedback moment, and at another set feedback moment, the reference code matrix is used to indicate the precoding matrix.
  • the second PMI of the second codebook index and the channel shield quantity indicate that the CQI is sent to the base station;
  • the 4 antenna codebook is a codebook for performing precoding matrix indication information feedback and includes a first codebook index and a second codebook index, and the value of the first codebook index is used in the configuration of the four pilot ports.
  • the range is 0 N-1 , where N is an integer greater than 1.
  • the compressed 4-antenna codebook is obtained by compressing the first precoding matrix set corresponding to the first codebook index in the 4-antenna codebook. a codebook formed by the compressed first precoding matrix set and the second precoding matrix set corresponding to the second codebook index, where the compressed first precoding matrix set includes a part of the first precoding matrix set before compression Precoding matrix.
  • the compressed first precoding matrix set uses any of the following preferred structures:
  • Manner 1 The precoding matrix in the first precoding matrix set before compression is divided into groups, wherein each of the two precoding matrices included in the group has the same discrete Fourier transform DFT vector; the precoding matrix included from each group Any one of them is selected as a precoding matrix in the compressed first precoding matrix set;
  • Manner 2 The precoding matrix in the first precoding matrix set before compression is divided into groups, where the first column DFT vector of the two precoding matrices included in each group is an adjacent DFT vector; from each group of precoding matrices Any one of them is selected as the precoding matrix in the compressed first precoding matrix set.
  • N is an even number.
  • the compressed first precoding matrix set may also adopt the following preferred structure:
  • Manner 3 arbitrarily select a partial precoding matrix in the compressed first precoding matrix set, and use the selected precoding matrix as a precoding matrix in the final compressed first precoding matrix set.
  • the compressed 4-antenna codebook uses the following structure:
  • the first precoding matrix set corresponding to the first codebook index in the codebook of rank 1 is a compressed first precoding matrix set; and/or,
  • the first precoding matrix set corresponding to the first codebook index in the codebook of rank 2 is the compressed first precoding matrix set.
  • a base station is further provided in the embodiment of the present application.
  • the principle of the problem solved by the base station is similar to the method for receiving the channel state information based on the codebook. Therefore, the implementation of the base station can refer to the codebook-based channel. The implementation of the method of receiving the status information will not be repeated here.
  • the base station provided by the embodiment of the present application includes:
  • the sending module 41 is configured to send, to the terminal, indication information, where the indication information is used to indicate that the terminal feeds back the channel state information and the feedback mode used by the current feedback;
  • the receiving module 42 is configured to receive, according to the feedback mode, a joint coding value of the RI and the first PMI sent by the terminal at a set feedback moment, and receive the indication sent by the terminal after the compression at another set feedback moment. a second PMI and CQI of the second codebook index of the precoding matrix in the 4-antenna codebook;
  • the processing module 43 is configured to determine, according to the set joint coding rule, an RI corresponding to the received joint code value and a first codebook index of the precoding matrix;
  • the 4 antenna codebook is a codebook for performing precoding matrix indication information feedback and includes a first codebook index and a second codebook index, and the value of the first codebook index is used in the configuration of the four pilot ports.
  • the range is 0 N-1 , where N is an integer greater than 1.
  • the compressed 4-antenna codebook is obtained by compressing the first precoding matrix set corresponding to the first codebook index in the 4-antenna codebook. a codebook formed by the compressed first precoding matrix set and the second precoding matrix set corresponding to the second codebook index, where the compressed first precoding matrix set includes a part of the first precoding matrix set before compression Precoding matrix.
  • the compressed first precoding matrix set uses any of the following preferred structures:
  • Manner 1 The precoding matrix in the first precoding matrix set before compression is divided into groups, wherein each group includes Two precoding matrices have the same discrete Fourier transform DFT vector; arbitrarily select one from each set of precoding matrices as a precoding matrix in the compressed first precoding matrix set;
  • Manner 2 The precoding matrix in the first precoding matrix set before compression is divided into groups, where the first column DFT vector of the two precoding matrices included in each group is an adjacent DFT vector; from each group of precoding matrices Any one of them is selected as the precoding matrix in the compressed first precoding matrix set.
  • N is an even number.
  • the compressed first precoding matrix set may also adopt the following structure:
  • Manner 3 arbitrarily select a partial precoding matrix in the compressed first precoding matrix set, and use the selected precoding matrix as a precoding matrix in the final compressed first precoding matrix set.
  • the compressed 4-antenna codebook comprises:
  • the first precoding matrix set corresponding to the first codebook index in the codebook of rank 1 is a compressed first precoding matrix set; and/or,
  • the first precoding matrix set corresponding to the first codebook index in the codebook of rank 2 is the compressed first precoding matrix set.
  • the terminal at least includes: a memory 51, a processor 52, and an antenna 53, wherein: the memory 51 stores at least a compressed 4-antenna codebook, and a set joint coding rule;
  • the antenna 53 receives the indication information sent by the base station, and triggers the processor 52 to perform feedback of the channel state information.
  • the processor 52 determines the RI and the compressed 4-antenna codebook stored in the memory 51 under the trigger of the antenna 53. a precoding matrix to be used; determining, according to a joint coding rule stored in the memory 51, a joint coding value corresponding to the first PMI indicating the first codebook index of the precoding matrix, and according to the antenna 53
  • the feedback mode indicated in the received indication information indicates that the antenna 53 transmits the joint coded value determined by itself to the base station at the set feedback moment, and at another set feedback moment, the reference code is used to indicate the precoding matrix.
  • the second PMI and CQI of the second codebook index are sent to the base station.
  • the 4 antenna codebook is a codebook for performing precoding matrix indication information feedback and includes a first codebook index and a second codebook index, and the value of the first codebook index is used in the configuration of the four pilot ports.
  • the range is 0 N-1 , where N is an integer greater than 1; the compressed 4 antenna codebook is obtained by compressing the first precoding matrix set corresponding to the first codebook index in the 4 antenna codebook, a codebook formed by the compressed first precoding matrix set and the second precoding matrix set corresponding to the second codebook index, where the compressed first precoding matrix set includes the first precoding matrix set before compression Partial precoding matrix.
  • the base station at least includes: a memory 61, a processor 62, and an antenna 63, wherein: the memory 61 stores at least a compressed 4-antenna codebook and a set joint coding rule; and the antenna 63 is processed.
  • the indication information is sent to the terminal, and the indication information is used to indicate that the terminal feeds back the channel state information and the feedback mode used in the current feedback; and under the trigger of the processor 62, according to the feedback mode, the setting is a feedback timing, the joint code value of the RI and the first PMI sent by the receiving terminal, and the second codebook index sent by the terminal for indicating the precoding matrix in the compressed 4-antenna codebook at another set feedback moment Second PMI and CQI, and trigger processor 62 to work;
  • the processor 62 determines the RI corresponding to the received joint code value and the first codebook index from the set joint coding rule stored in the memory 61 under the trigger of the antenna 63, and further, after the compression stored in the memory 61.
  • the received first codebook index and the precoding matrix corresponding to the second codebook index are determined.
  • the 4 antenna codebook is a codebook for performing precoding matrix indication information feedback and includes a first codebook index and a second codebook index, and the value of the first codebook index is used in the configuration of the four pilot ports.
  • the range is 0 N-1 , where N is an integer greater than 1; the compressed 4 antenna codebook is obtained by compressing the first precoding matrix set corresponding to the first codebook index in the 4 antenna codebook, a codebook formed by the compressed first precoding matrix set and the second precoding matrix set corresponding to the second codebook index, where the compressed first precoding matrix set includes the first precoding matrix set before compression Partial precoding matrix.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the application can be in the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
  • the application can be in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

L'invention concerne un procédé et un dispositif de transmission pour des informations d'état de canal sur la base d'un livre de codes, qui sont utilisés pour résoudre le problème selon lequel il n'existe pas de solution spécifique à l'heure actuelle pour renvoyer les informations d'état de canal sur la base d'un livre de codes amélioré pour le cas d'un port à quatre antennes. Le procédé comprend les étapes suivantes : après avoir reçu des informations d'indication envoyées par une station de base, un terminal détermine un RI et une matrice de précodage utilisée à partir d'un livre de codes à quatre antennes compressé ; en fonction d'une règle de codage unifié définie, le terminal détermine le RI et une valeur de codage unifié correspondant à un premier PMI qui est utilisé pour indiquer un premier index de livre de codes de la matrice de précodage ; et en fonction d'un mode de rétroaction indiqué dans les informations d'indication, à un moment de rétroaction défini, le terminal envoie la valeur de codage unifié déterminée à la station de base, et à l'autre moment de rétroaction défini, le terminal envoie un second PMI, qui est utilisé pour indiquer un second index de livre de codes de la matrice de précodage, et un CQI à la station de base, réalisant ainsi le retour des informations d'état de canal sur la base du livre de codes amélioré dans le cas d'un port à quatre antennes.
PCT/CN2014/079283 2013-06-06 2014-06-05 Procédé et dispositif de transmission d'informations d'état de canal sur la base d'un livre de codes Ceased WO2014194842A1 (fr)

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