WO2018059567A1 - Procédé et dispositif de rétroaction d'informations d'état de canal à base de livre de codes - Google Patents

Procédé et dispositif de rétroaction d'informations d'état de canal à base de livre de codes Download PDF

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Publication number
WO2018059567A1
WO2018059567A1 PCT/CN2017/104656 CN2017104656W WO2018059567A1 WO 2018059567 A1 WO2018059567 A1 WO 2018059567A1 CN 2017104656 W CN2017104656 W CN 2017104656W WO 2018059567 A1 WO2018059567 A1 WO 2018059567A1
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WIPO (PCT)
Prior art keywords
codebook
precoding matrix
pmi
antenna
phase difference
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PCT/CN2017/104656
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English (en)
Chinese (zh)
Inventor
黄逸
李元杰
任海豹
纪刘榴
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华为技术有限公司
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Priority claimed from CN201710336128.9A external-priority patent/CN107888246B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CA3038852A priority Critical patent/CA3038852C/fr
Priority to BR112019005984A priority patent/BR112019005984A2/pt
Priority to EP17855017.4A priority patent/EP3518434B1/fr
Priority to JP2019516626A priority patent/JP6977232B2/ja
Priority to KR1020197012248A priority patent/KR102455312B1/ko
Priority to CN201780060650.7A priority patent/CN110100393B/zh
Priority to AU2017336900A priority patent/AU2017336900B2/en
Priority to RU2019112808A priority patent/RU2756905C2/ru
Publication of WO2018059567A1 publication Critical patent/WO2018059567A1/fr
Priority to US16/369,043 priority patent/US10819406B2/en

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    • 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

Definitions

  • the present invention relates to the field of technical communication technologies, and in particular, to a method and device for channel state information feedback based on a codebook.
  • Massive multiple input multiple output (Massive MIMO) technology is one of the key technologies of New Radio Access Technology (NR), which can utilize more space freedom to improve system capacity. , has been extensively studied.
  • NR New Radio Access Technology
  • the transmitting end In a large-scale MIMO system, in order to improve system transmission performance by performing precoding on the transmitting end, the transmitting end needs to know channel state information (CSI), and the CSI is usually obtained by the receiving end for channel measurement. The receiving end needs to feed back the CSI to the transmitting end.
  • the receiving end feeding back CSI to the transmitting end is mainly implemented by feeding back a Precoding Matrix Index (PMI) to the transmitting end.
  • PMI Precoding Matrix Index
  • the transmitting end and the receiving end share a codebook.
  • the transmitting end selects a precoding matrix from the codebook according to the CSI, and feeds the PMI corresponding to the precoding matrix to the base station, and the base station according to the base station.
  • the PMI restores the optimal precoding matrix and then performs precoding processing.
  • the existing codebooks are designed for uniform antenna arrays, mainly for linear phase compensation, and when the multi-panel antenna arrays are not evenly spaced, linear phase compensation is no longer appropriate, and using existing codebooks will change the beam shape. The required beam is not obtained, resulting in problems of reduced beam accuracy and loss of system performance.
  • Embodiments of the present invention provide a channel state based channel state information feedback method and device to improve beam precision and system performance.
  • an embodiment of the present invention provides a channel state information feedback method based on a codebook, including:
  • the user equipment UE sends a precoding matrix indication PMI to the transmitting and receiving point TRP, where the PMI is used to indicate a parameter value corresponding to the target precoding matrix and the block codebook difference parameter;
  • the target precoding matrix is a precoding matrix in a codebook, where the codebook is a codebook pre-generated by the UE according to a codebook configuration parameter, and at least part of the precoding matrix in the codebook is a block code.
  • the precoding matrix and the parameter value are obtained by transforming, the number of the block codebooks is at least two, and the number of the parameter values has a correspondence relationship with the number of the block codebooks, and the codebook configuration
  • the parameter includes a number of block codebooks in the codebook and a length of a vector corresponding to a precoding matrix in the block codebook, the block codebook being composed of a preset precoding matrix.
  • the block codebook includes a block codebook of a horizontal dimension and a block codebook of a vertical dimension;
  • the codebook configuration parameter includes: a quantity of the block codebook of the horizontal dimension and a length of a vector corresponding to the precoding matrix in the block codebook of the horizontal dimension, where the number of block codebooks of the horizontal dimension is at least Two;
  • the PMI includes a first PMI corresponding to a CSI of a broadband and a second PMI corresponding to a CSI of a subband, where the first PMI or the second PMI is used to indicate the block codebook The parameter value corresponding to the difference parameter.
  • the PMI includes a first PMI corresponding to a CSI of a broadband and a second PMI corresponding to a CSI of a subband, and a value of a parameter value corresponding to the block code difference parameter is used by the first PMI Or the second PMI is determined.
  • the first PMI is used to indicate the parameter value
  • the first PMI corresponds to two codebook indexes, where one codebook index is used to indicate a block codebook difference parameter corresponding to a horizontal dimension.
  • the parameter value of the other codebook index is used to indicate the parameter value corresponding to the block codebook difference parameter of the vertical dimension.
  • the first PMI is used to indicate the parameter value
  • the first PMI corresponds to two codebook indexes
  • the parameter value corresponding to the horizontal code block code difference parameter is represented by one of the codebooks.
  • the index determines that another codebook index is used to indicate that the parameter value corresponding to the block codebook difference parameter of the vertical dimension is determined by another codebook index.
  • the second PMI is used to indicate the parameter value, and the second PMI is corresponding to two codebook indexes, where one codebook index is used to indicate a parameter value corresponding to a block codebook difference parameter of a horizontal dimension, and another codebook The index is used to indicate the parameter value corresponding to the block codebook difference parameter of the vertical dimension.
  • the parameter value is indicated by the second PMI
  • the second PMI corresponds to two codebook indexes
  • the parameter value corresponding to the block codebook difference parameter of the horizontal dimension is indexed by one of the codebooks.
  • Indicates that the parameter value corresponding to the block code difference parameter of the vertical dimension is indicated by another codebook index.
  • the PMI includes a first PMI corresponding to a CSI of a broadband, a second PMI corresponding to a CSI of a narrowband, and a third PMI, where the third PMI is used to indicate the difference parameter of the block codebook Corresponding parameter values.
  • the third PMI corresponds to two codebook indexes, where one codebook index is used to indicate a parameter value corresponding to a block codebook difference parameter of a horizontal dimension, and another codebook index is used to indicate a vertical value.
  • the parameter value corresponding to the block codebook difference parameter of the dimension is used to indicate a vertical value.
  • the method before the user equipment UE sends the precoding matrix indication PMI to the transmitting and receiving point TRP, the method further includes:
  • the UE receives the codebook configuration parameter sent by the TRP.
  • the user equipment UE receives the codebook configuration parameters sent by the TRP, including:
  • the UE receives the high layer signaling or the physical layer signaling that is sent by the TRP, and the high layer signaling or the physical layer signaling carries the codebook configuration parameter.
  • the vector corresponding to each block codebook is a vector corresponding to the beam of the same transmission angle, for example, the vector may be a Discrete Fourier Transform (DFT) vector.
  • DFT Discrete Fourier Transform
  • the structure of the precoding matrix in the codebook is specifically as shown in the following formula 1.1:
  • Equation 1.1 can also be
  • v l represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 1 block codebook of a horizontal dimension
  • v l denotes the codebook each block is a vector of length K 1 composition
  • K 1 is the number of the CSI-RS ports of the horizontal dimension of the codebook corresponding to each of the blocks
  • [theta] represents the horizontal dimension of the phase difference parameter, a phase difference between precoding matrices in different block codebooks representing horizontal dimensions
  • ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 2 block codebook of a vertical dimension
  • u m represents each block of length K codebook vectors composed of 2
  • K 2 is the number of the vertical dimension of each codebook corresponding to the CSI-RS ports
  • [P represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a
  • ⁇ N2 represents a phase difference between precoding matrices in different block codebooks of a vertical dimension; said O 1 and said O 2 represent oversampling factors, said l, m, n being functions of a codebook index
  • the codebook index has a corresponding relationship with the PMI, and the j is a unit imaginary number, Represents Kronecker.
  • the structure of the precoding matrix in the codebook is specifically as shown in the following formula 1.2:
  • Equation 1.2 can also be:
  • v l, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 1 block codebook of a horizontal dimension;
  • v l denotes the codebook each block is a vector of length K 1 composition, K 1 is the number of the CSI-RS ports of the horizontal dimension of the codebook corresponding to each of the blocks, the horizontal dimension beta] modulo value representative of a difference parameter, a modulus difference between precoding matrices in different block codebooks representing horizontal dimensions;
  • u m, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 2 block codebook of a vertical dimension;
  • u m represents each block of length K codebook vectors composed of 2
  • K 2 is the number of the vertical dimension of the codebook corresponding to each block of CSI-RS ports;
  • the vector corresponding to each block codebook is a vector corresponding to a beam of different transmission angles.
  • Equation 1.3 the structure of the precoding matrix in the codebook is as shown in Equation 1.3:
  • Equation 1.3 can also be:
  • v l, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 1 block codebook of a horizontal dimension
  • v l denotes the codebook each block is a vector of length K 1 composition
  • K 1 is the number of the CSI-RS ports of the horizontal dimension of the codebook corresponding to each of the blocks
  • [theta] represents the horizontal dimension of the phase difference parameter, a phase difference between precoding matrices in different block codebooks representing horizontal dimensions
  • you can also u m, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 2 block codebook of a vertical dimension
  • u m represents each block of length K codebook vectors composed of 2
  • K 2 is the number of the vertical dimension of each codebook corresponding to the CSI-RS ports
  • [P Representing the phase difference between the two polarization directions of the antenna
  • ⁇ N2 represents a phase difference between precoding matrices in different block codebooks of a vertical dimension; said O 1 and said O 2 represent oversampling factors, said l, m, n being functions of a codebook index
  • the codebook index has a corresponding relationship with the PMI, and the j is a unit imaginary number, Represents Kronecker.
  • Equation 1.4 the structure of the precoding matrix in the codebook is as shown in Equation 1.4:
  • Equation 1.4 can also be:
  • v l, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 1 block codebook of a horizontal dimension;
  • ok, v l denotes the codebook each block is a vector of length K 1 composition, K 1 is the number of the CSI-RS ports of each of the block codes corresponding to this horizontal dimension, the horizontal dimension beta] modulo value representative of a difference parameter, a modulus difference between precoding matrices in different block codebooks representing horizontal dimensions;
  • ok, u m, ⁇ represents a precoding matrix in the codebook obtained by transforming the N 2 block codebooks of the vertical dimension and the parameter values corresponding to the block code difference parameter;
  • u m each represents a block of length K codebook vectors composed of 2
  • K 2 is the number of the vertical dimension of the codebook corresponding to each block of CSI-RS ports
  • the amplitude and phase factors can be used in combination.
  • an embodiment of the present invention provides a channel state information feedback method based on a codebook, including:
  • the receiving and receiving point TFP receives a precoding matrix indication PMI sent by the user equipment UE, where the PMI is used to indicate a parameter value corresponding to the target precoding matrix and the block codebook difference parameter;
  • the target precoding matrix is a precoding matrix in a codebook, where the codebook is a codebook pre-generated by the TRP according to a codebook configuration parameter, and at least part of the precoding matrix in the codebook is a block code.
  • the precoding matrix and the parameter value are obtained by transforming, the number of the block codebooks is at least two, and the number of the parameter values has a correspondence relationship with the number of the block codebooks, and the codebook configuration
  • the parameter includes a number of block codebooks in the codebook and a length of a vector corresponding to a precoding matrix in the block codebook, the block codebook being composed of a preset precoding matrix.
  • the block codebook includes a block codebook of a horizontal dimension and a block codebook of a vertical dimension;
  • the codebook configuration parameter includes: a quantity of the block codebook of the horizontal dimension and a length of a vector corresponding to the precoding matrix in the block codebook of the horizontal dimension, where the number of block codebooks of the horizontal dimension is at least Two;
  • the PMI includes a first PMI corresponding to a CSI of a broadband and a second PMI corresponding to a CSI of a subband, where the first PMI or the second PMI is used to indicate the block codebook The parameter value corresponding to the difference parameter.
  • the first PMI is used to indicate the parameter value
  • the first PMI corresponds to two codebook indexes, where one codebook index is used to indicate a block codebook difference parameter corresponding to a horizontal dimension. Parameter value, another codebook index is used to indicate the parameter value corresponding to the block codebook difference parameter of the vertical dimension; or
  • the second PMI is used to indicate the parameter value, and the second PMI is corresponding to two codebook indexes, where one codebook index is used to indicate a parameter value corresponding to a block codebook difference parameter of a horizontal dimension, and another codebook The index is used to indicate the parameter value corresponding to the block codebook difference parameter of the vertical dimension.
  • the PMI includes a first PMI corresponding to a CSI of a broadband, a second PMI corresponding to a CSI of a narrowband, and a third PMI, where the third PMI is used to indicate the difference parameter of the block codebook Corresponding parameter values.
  • the third PMI corresponds to two codebook indexes, where one codebook index is used to indicate a parameter value corresponding to a block codebook difference parameter of a horizontal dimension, and another codebook index is used to indicate a vertical value.
  • the parameter value corresponding to the block codebook difference parameter of the dimension is used to indicate a vertical value.
  • the method before the sending and receiving point TFP receives the precoding matrix indication PMI sent by the user equipment UE, the method further includes:
  • the TRP sends the codebook configuration parameter to the UE.
  • the TRP sends the codebook configuration parameter to the UE, including:
  • the TRP sends the high layer signaling or the physical layer signaling to the UE, where the high layer signaling or the physical layer signaling carries the codebook configuration parameter.
  • the embodiment of the present invention provides a user equipment, where the user equipment can implement the functions performed by the user equipment in the foregoing method, and the functions can be implemented by using hardware or by executing corresponding software through hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • an embodiment of the present invention provides a sending and receiving point, where the sending and receiving point can implement the foregoing method.
  • the function performed by the transmitting and receiving point may be implemented by hardware or by executing corresponding software through hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • an embodiment of the present invention provides a user equipment, including: a processor, a memory, and a communication interface, where the memory is used to store an instruction, the communication interface is used to communicate with another device, and the processor is used to execute the The instructions stored in the memory are arranged to cause the user equipment to perform the method described in the first aspect above.
  • an embodiment of the present invention provides a sending and receiving point, including: a processor, a memory, and a communication interface, where the memory is used to store an instruction, the communication interface is used to communicate with other devices, and the processor is configured to execute The instructions stored in the memory are such that the transmitting and receiving points perform the method described in the second aspect above.
  • an embodiment of the present invention provides a computer readable medium, the computer readable medium comprising computer executed instructions for causing a user equipment to perform the method provided by the first aspect of the present invention.
  • an embodiment of the present invention provides a computer readable medium, the computer readable medium comprising computer execution instructions for causing a transmitting and receiving point to perform the method provided by the second aspect of the present invention.
  • an embodiment of the present invention provides a system on chip, where the system on chip is applicable to a user equipment, where the system on chip includes: at least one communication interface, at least one processor, at least one memory, and the communication The interface, the memory and the processor are interconnected by a bus, the processor causing the user equipment to perform the method provided by the first aspect of the invention by executing instructions stored in the memory.
  • an embodiment of the present invention provides an on-chip system, where the system on chip is applicable to a transmitting and receiving point, where the system on chip includes: at least one communication interface, at least one processor, at least one memory, The communication interface, the memory and the processor are interconnected by a bus, the processor causing the transmitting and receiving point to perform the method provided by the second aspect of the present invention by executing instructions stored in the memory.
  • an embodiment of the present invention provides a communication system, where the communication system includes a user equipment and a sending and receiving point, where the user equipment is used to perform the method provided by the first aspect of the present invention, where the sending and receiving point is used for The method provided by the second aspect of the invention is carried out.
  • the UE sends a precoding matrix indication PMI to the TRP, where the PMI is used to indicate a parameter value corresponding to the target precoding matrix and the block codebook difference parameter, and the PMI is used.
  • the target precoding matrix is a precoding matrix in the codebook, and at least part of the precoding matrix in the codebook is obtained by transforming a precoding matrix and a parameter value in the block codebook, so as to obtain a parameter value corresponding to the block codebook difference parameter.
  • the codebook includes different parameters such as phase difference and modulus difference between adjacent panels, thereby ensuring beam directivity and improving system performance.
  • the embodiment of the invention provides a communication method, which can be applied in the application process of the precoding matrix, and includes:
  • the terminal device sends precoding matrix indication information to the radio access network device, where the precoding matrix indication information is used to indicate a precoding matrix in the codebook, the codebook has information about the number of block codebooks, and different block codebooks. Information of the phase difference between the two, the number of the block codebooks being at least two;
  • the terminal device receives downlink data from the radio access network device.
  • the embodiment of the invention provides a communication method, which can be applied to the application process of the precoding matrix, and includes:
  • the terminal device sends precoding matrix indication information to the radio access network device, where the precoding matrix indication information is used to indicate a precoding matrix in the codebook, where the codebook has corresponding information of the number of antenna panels, and corresponding corresponding Information on the phase difference between the antenna panels;
  • the terminal device receives downlink data from the radio access network device.
  • the embodiment of the invention provides a communication method, which can be applied in the application process of the precoding matrix, and includes:
  • the terminal device sends precoding matrix indication information to the radio access network device, where the precoding matrix indication information is used to indicate a precoding matrix in the codebook, the codebook has the number of antenna port groups, and different antenna port groups Information about the phase factor;
  • the terminal device receives downlink data from the radio access network device.
  • a feasible design is that the precoding matrix in the codebook satisfies:
  • v l denotes the length of a vector K DFT
  • the first 1 k v l th element The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , K 1 is the number of ports CSI-RS for each antenna port group horizontal dimension;
  • u m represents a vector of length 2 K DFT, k u m of two elements
  • the value of k 2 may be ⁇ 1, 2, ..., K 2 -1 ⁇ , the K 2 being the number of CSI-RS ports in the vertical dimension in each packet; ( ⁇ 1 ...
  • a feasible design is that the precoding matrix in the codebook satisfies:
  • v l, m represents the length of K 1 ⁇ K vector 2
  • v l, k m of a first element is The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , the CSI-RS K 1 is the number of packets in each port of the horizontal dimension; or
  • u m represents a DFT vector of length K 2 and the k 2 element of u m is The value of k 2 may be ⁇ 1, 2, ..., K 2 -1 ⁇ , the K 2 being the number of CSI-RS ports in the vertical dimension in each packet, the O 1 and the O 2 representing the oversampling factor ;l and m represent functions of the first PMI;
  • Indicates the phase difference or phase factor between two polarization directions of the antenna where n is a value ⁇ 0, 1, 2, 3 ⁇ ; e represents a natural constant, j represents a unit imaginary number, and ⁇ represents a pi ratio; ( ⁇ 1 ...
  • a feasible design is that the precoding matrix in the codebook satisfies:
  • v l denotes the length of a vector K DFT
  • the first 1 k v l th element The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , K 1 is the number of ports CSI-RS for each antenna port group horizontal dimension; or u m represents a vector of length 2 K DFT, k u m of two elements
  • the value of k 2 may be ⁇ 1, 2, ..., K 2 -1 ⁇ , the K 2 being the number of CSI-RS ports in the vertical dimension in each packet;
  • the l is a function of the first horizontal codebook index, Corresponding to the first PMI, the function of the first vertical codebook index having a corresponding relationship with the first PMI; the O 1 and the O 2 representing an oversampling factor, Represents the Kronecker product; where e represents a natural constant, j represents a unit imaginary number, ⁇ represents a pi, and ( ⁇ 1 ...
  • ⁇ N-1 represents a phase difference or phase between antenna ports of different polarization directions of the same antenna port group Factor, or phase difference or phase factor between antenna ports representing the same polarization direction of different antenna port groups, or phase difference or phase factor between antenna ports representing different polarization directions in different antenna port groups, N represents an antenna The product of the number of port groups and the number of antenna polarization directions, or N is 2 or 4 or 8.
  • a feasible design is that the precoding matrix in the codebook satisfies:
  • v l, m represents the length of K 1 ⁇ K vector 2
  • v l, k m of a first element is The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , K 1 is the number of ports of each CSI-RS antenna port packet horizontal dimension; or u m represents a vector of length 2 K DFT, k u m of two elements
  • the value of k 2 may be ⁇ 1, 2, ..., K 2 -1 ⁇ , the K 2 being the number of CSI-RS ports of the vertical dimension in each antenna port group;
  • the O 1 and the O 2 represent sampling factor, l is a function of the level of a first codebook index, having a first correspondence between the PMI, m is a function of said first vertical codebook index, having a first corresponding relationship between the PMI; O 1 and the The O 2 represents an oversampling factor; ( ⁇ 1 ...
  • ⁇ N-1 represents a phase difference or phase factor between antenna ports of different polarization directions of the same antenna port group, or represents the same polarization direction of different antenna port groups.
  • N indicates the number of antenna port groups and the number of antenna polarization directions Product, or N is 2 or 4 or 8.
  • any of the foregoing designs further includes: the terminal device receiving high layer signaling from the radio access network device, where the high layer signaling includes information about the number of the block codebook.
  • any of the foregoing designs further includes: the terminal device receiving high layer signaling from the radio access network device, where the high layer signaling includes information about the corresponding number of antenna panels.
  • any of the foregoing designs also includes:
  • the terminal device receives high layer signaling from the radio access network device, where the high layer signaling includes the number of antenna port groups.
  • any of the foregoing designs further includes: the antenna port is a channel state reference signal port.
  • any of the foregoing designs further includes: the precoding matrix indication information includes: a first precoding matrix indication corresponding to the broadband channel state information CSI, and/or channel state information with the subband A second precoding matrix indication corresponding to the CSI.
  • any of the foregoing designs further includes: the first precoding matrix indication, and/or the second precoding matrix indication includes a phase difference for indicating the block codebook Information.
  • any of the foregoing designs further includes: the information for indicating a phase difference between the block codebooks includes at least one index value, and a phase difference between the index value and a block codebook Have a corresponding relationship.
  • any of the foregoing designs also includes:
  • the precoding matrix indication information includes: a first precoding matrix indication corresponding to the wideband channel state information CSI, a second precoding matrix indication corresponding to the channel state information CSI of the subband, and a third precoding matrix indication,
  • the third precoding matrix indication includes a phase difference for indicating the block codebook.
  • the embodiment of the invention provides a communication method, which can be applied in the application process of the precoding matrix, and includes:
  • the terminal device receives signaling from the radio access network device, where the signaling includes any one of the following: information about the number of block codes, information about the number of antenna panels, and the number of antenna port groups;
  • the terminal device learns the codebook to be used according to any one of the block code number information, the corresponding information of the number of antenna panels, and the number of antenna port groups.
  • the antenna port is a channel state reference signal port.
  • the embodiment of the invention provides a communication method, which can be applied in the application process of the precoding matrix, and includes:
  • the radio access network device receives precoding matrix indication information from the terminal, where the precoding matrix indication information is used to indicate a precoding matrix in the codebook, the codebook has information on the number of block codebooks, and different block codes. Information about the phase difference between the two, the number of the block codebooks being at least two;
  • the radio access network device sends downlink data to the terminal device.
  • the embodiment of the invention provides a communication method, which can be applied in the application process of the precoding matrix, and includes:
  • the radio access network device receives the precoding matrix indication information from the terminal, where the precoding matrix indication information is used to indicate a precoding matrix in the codebook, where the codebook has information about the number of antenna panels, and corresponding Information on the phase difference between different antenna panels;
  • the radio access network device sends downlink data to the terminal device.
  • the embodiment of the invention provides a communication method, which can be applied in the application process of the precoding matrix, and includes:
  • the radio access network device receives precoding matrix indication information from the terminal, where the precoding matrix indication information is used to indicate a precoding matrix in the codebook, the codebook has a number of antenna port groups, and different antenna port groups Information between the phase factors;
  • the radio access network device sends downlink data to the terminal device.
  • any of the foregoing designs further includes: the precoding matrix in the codebook satisfies:
  • v l denotes the length of a vector K DFT
  • the first 1 k v l th element The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , K 1 is the number of ports CSI-RS for each antenna port group horizontal dimension;
  • u m represents a vector of length 2 K DFT, k u m of two elements
  • the value of k 2 may be ⁇ 1, 2, ..., K 2 -1 ⁇ , the K 2 being the number of CSI-RS ports in the vertical dimension in each packet; ( ⁇ 1 ...
  • any of the foregoing designs further includes: the precoding matrix in the codebook satisfies:
  • v l, m represents the length of K 1 ⁇ K vector 2
  • v l, k m of a first element is The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , the CSI-RS K 1 is the number of ports in each packet the horizontal dimension; or
  • u m represents a DFT vector of length K 2 and the k 2 element of u m is The value of k 2 may be ⁇ 1, 2, ..., K 2 -1 ⁇ , the K 2 being the number of CSI-RS ports in the vertical dimension in each packet, the O 1 and the O 2 representing the oversampling factor ;l and m represent functions of the first PMI;
  • Indicates the phase difference or phase factor between two polarization directions of the antenna where n is a value ⁇ 0, 1, 2, 3 ⁇ ; e represents a natural constant, j represents a unit imaginary number, and ⁇ represents a pi ratio; ( ⁇ 1 ...
  • any of the foregoing designs further includes: the precoding matrix in the codebook satisfies:
  • v l denotes the length of a vector K DFT
  • the first 1 k v l th element The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , K 1 is the number of ports CSI-RS for each antenna port group horizontal dimension; u m represents a vector of length 2 K DFT, k u m of two elements
  • the value of k 2 may be ⁇ 1, 2, ..., K 2 -1 ⁇ , the K 2 being the number of CSI-RS ports in the vertical dimension in each packet;
  • the l is a function of the first horizontal codebook index, Corresponding to the first PMI, the function of the first vertical codebook index having a corresponding relationship with the first PMI; the O 1 and the O 2 representing an oversampling factor, Represents the Kronecker product; where e represents a natural constant, j represents a unit imaginary number, ⁇ represents a pi, and ( ⁇ 1 ...
  • ⁇ N-1 represents a phase difference or phase between antenna ports of different polarization directions of the same antenna port group a factor, or a phase difference or phase factor between antenna ports representing the same polarization direction of different antenna port groups, or a phase difference or phase factor between antenna ports representing different polarization directions in different antenna port groups; N indicates an antenna The product of the number of port groups and the number of antenna polarization directions, or N is 2 or 4 or 8.
  • any of the foregoing designs further includes: the precoding matrix in the codebook satisfies:
  • v l, m represents the length of K 1 ⁇ K vector 2
  • v l, k m of a first element is The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , K 1 is the number of ports of each CSI-RS antenna port packet horizontal dimension; or u m represents a vector of length 2 K DFT, k u m of two elements
  • the value of k 2 may be ⁇ 1, 2, ..., K 2 -1 ⁇ , the K 2 being the number of CSI-RS ports of the vertical dimension in each antenna port group;
  • the O 1 and the O 2 represent sampling factor, l is a function of the level of a first codebook index, having a first correspondence between the PMI, m is a function of said first vertical codebook index, having a first corresponding relationship between the PMI; O 1 and the The O 2 represents an oversampling factor; ( ⁇ 1 ...
  • ⁇ N-1 represents a phase difference or phase factor between antenna ports of different polarization directions of the same antenna port group, or represents the same polarization direction of different antenna port groups.
  • N indicates the number of antenna port groups and the number of antenna polarization directions Product, or N is 2 or 4 or 8.
  • any of the foregoing designs further includes: the radio access network device transmitting high layer signaling to the terminal device, where the high layer signaling includes information about the number of the block codebook.
  • any of the foregoing designs further includes: the radio access network device transmitting high layer signaling to the terminal device, where the high layer signaling includes the number of the antenna port groups.
  • any of the foregoing designs further includes: the antenna port is a channel state reference signal port.
  • any of the foregoing designs further includes: the precoding matrix indication information includes: a first precoding matrix indication corresponding to the broadband channel state information CSI, and/or channel state information with the subband A second precoding matrix indication corresponding to the CSI.
  • any of the foregoing designs also includes:
  • the first precoding matrix indicates, and/or the second precoding matrix indication includes information indicating a phase difference between the block codebooks.
  • any of the foregoing designs further includes: the information for indicating a phase difference between the block codebooks includes at least one index value, and a phase difference between the index value and a block codebook Have a corresponding relationship.
  • any of the foregoing designs further includes: the precoding matrix indication information includes: a first precoding matrix indication corresponding to the broadband channel state information CSI, and a corresponding to the channel state information CSI of the subband a second precoding matrix indication, and a third precoding matrix indication, where the third precoding matrix indication includes information indicating a parameter value corresponding to the block code difference parameter; or the precoding matrix indication information
  • the method includes: a first precoding matrix indication corresponding to the broadband channel state information CSI, a second precoding matrix indication corresponding to the channel state information CSI of the subband, and a third precoding matrix indication, the third precoding matrix
  • the indication includes a phase difference for indicating the block codebook.
  • the embodiment of the invention provides a communication method, which can be applied in the application process of the precoding matrix, and includes:
  • the radio access network device sends signaling to the terminal device, where the signaling includes any one of the following: information about the number of block codes, information about the number of antenna panels, and the number of antenna port groups;
  • the codebook to be used is obtained by the terminal device according to any one of the block code number information, the corresponding information of the number of antenna panels, and the number of antenna port groups.
  • the antenna port is a channel state reference signal port.
  • An embodiment of the present invention provides a terminal device, including: a processor, a memory, and a transceiver, where the memory is used to store an instruction, the transceiver is used to communicate with the terminal device, and the processor is configured to execute the An instruction stored in the memory to cause the terminal device to perform the operation of the design as described in any of the aforementioned twelfth aspect and the thirteenth aspect.
  • An embodiment of the present invention provides a radio access network device, including: a processor, a memory, and a transceiver, where the memory is used to store an instruction, and the transceiver is used by the radio access network device and other devices.
  • the processor is operative to execute instructions stored in the memory to cause the wireless access network device to perform operations as designed according to any of the fourteenth and fifteenth aspects.
  • An embodiment of the present invention provides a chip system, which is applicable to a terminal device, including: at least one processor, where the at least one processor is configured to execute a stored instruction, so that the terminal device performs the twelfth aspect and the tenth The operation of the design described in any of the three aspects.
  • An embodiment of the present invention provides a chip system, which is applicable to an access network device, and includes: at least one processor, where the at least one processor is configured to execute a stored instruction, so that the radio access network device performs the foregoing tenth The operation of the design of any of the four aspects and the fifteenth aspect.
  • Embodiments of the present invention provide a computer program product, which can be applied to a terminal device, where the computer program product
  • the instructions are included, when the instructions are executed, causing the terminal device to perform the operations of the design as described in any one of the aforementioned twelfth aspect and the thirteenth aspect.
  • the instructions may be executed by the computing device.
  • the computing device may be a computing processing circuit inside the terminal device, or may be a computing processing circuit other than the terminal device; the computing device may also be partially disposed in the terminal device and partially disposed in the terminal device. External to the terminal device.
  • An embodiment of the present invention provides a computer program product, which is applicable to an access network device, where the computer program product includes instructions, when the instruction is executed, causing the radio access network device to perform the fourteenth aspect as described above.
  • the instructions may be executed by the computing device.
  • the computing device may be a computing processing circuit inside the wireless access network device, or may be a computing processing circuit other than the wireless access network device; the computing device may also be partially disposed in A part of the radio access network device is externally disposed outside the radio access network device.
  • An embodiment of the present invention provides a computer readable storage medium, which is applicable to a terminal device, where the computer readable storage medium stores an instruction, when the instruction is executed, causing the terminal device to perform the twelfth aspect as described above. And the operation of the design of any of the thirteenth aspects.
  • An embodiment of the present invention provides a computer readable storage medium, which is applicable to an access network device, where the computer readable storage medium stores instructions, when the instruction is executed, causing the radio access network device to perform the foregoing.
  • the embodiment of the present invention provides a terminal device for performing an operation designed as described in any of the foregoing twelfth aspect and the thirteenth aspect.
  • the embodiment of the present invention provides a radio access network device for performing the operation of the design according to any of the fourteenth aspects and the fifteenth aspect.
  • the embodiment of the present invention provides a communication system, comprising: the terminal device according to the sixteenth aspect and the twenty-fourth aspect, and/or the wireless device according to the seventeenth aspect and the twenty-fifth aspect Access network equipment.
  • FIG. 1 shows a network architecture that may be applicable to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a multi-panel array antenna according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method for feeding back channel state information based on a codebook according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram 1 of an antenna panel and a beam according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram 2 of an antenna panel and a beam according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram 3 of an antenna panel and a beam according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of hardware of a user equipment according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a TRP according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of hardware of a TRP according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a system on a chip according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a system on a chip according to an embodiment of the present invention.
  • the network architecture and the service scenario described in the embodiments of the present invention are used to more clearly illustrate the technical solutions of the embodiments of the present invention, and do not constitute a limitation of the technical solutions provided by the embodiments of the present invention.
  • the technical solutions provided by the embodiments of the present invention are equally applicable to similar technical problems.
  • FIG. 1 is a schematic diagram of a network architecture that may be applicable to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a multi-panel array antenna according to an embodiment of the present invention.
  • the network architecture mainly includes a base station 01 and a user equipment (User Equipment, UE for short) 02, and performs wireless communication between the base station 01 and the UE 02.
  • User Equipment User Equipment
  • the UE involved in the embodiments of the present invention may include various handheld devices, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to the wireless modem, and various forms of terminal devices, mobile stations. (Mobile Station, MS) and more.
  • a base station (BS) is a device deployed in a radio access network to provide a wireless communication function for a terminal.
  • the base station may include various forms of macro base stations, micro base stations, relay stations, access points, and the like.
  • the name of a device with a base station function may be different, for example, in a Long Term Evolution (LTE) system, called an evolved Node B (eNB). Or eNodeB), in a 3G communication system, called a Node B or the like.
  • LTE Long Term Evolution
  • eNB evolved Node B
  • Node B 3G communication system
  • 5G 5th Generation
  • the name of the base station becomes a transmission reception point (Transmission Reception Point, referred to as TRP), but this does not affect the implementation of the embodiments of the present invention.
  • TRP Transmission Reception Point
  • the technical solution of the present embodiment will be described in detail with the TRP as the main body of execution.
  • the configured large-scale transmit antenna can be as shown in FIG. 2.
  • the structure of the large-scale transmitting antenna may be a multi-antenna panel array antenna.
  • the multi-antenna panel array antenna includes an M1 block antenna panel in a vertical dimension and an M2 block antenna panel in a horizontal dimension.
  • the distance between adjacent antenna panels in the vertical direction is d 1 , that is, the row spacing d 1 between adjacent antenna panels of each row, wherein adjacent antenna panels in the vertical direction The distance between them can be the same or different.
  • the distance between adjacent antenna panels in the horizontal direction is d 2 , that is, the column spacing between adjacent antenna panels of each column is d 2 , wherein the horizontal direction is adjacent
  • the distance between the antenna panels may be the same or different.
  • an array antenna is disposed on each antenna panel.
  • the TRP In the process of communication between the TRP and the UE, the TRP usually uses the precoding matrix to preprocess the data to be sent to reduce interference between different data streams of the same user or data streams of different users, thereby improving system performance.
  • the information required for the TRP to perform preprocessing is based on the measurement information of the downlink channel fed back by the UE.
  • the UE performs channel estimation according to a reference signal sent by the TRP, such as a Channel State Information Reference Signal (CSI-RS), and determines Channel State Information (CSI) according to the estimation result.
  • the information includes a transmission rank (the number of data layers to be transmitted), a precoding matrix indicator (PMI), and a channel quality indicator (CQI), and then the UE feeds back the determined CSI to the TRP.
  • the TRP is used as a reference for downlink scheduling and data transmission.
  • each precoding matrix in the codebook corresponds to one or more codebook indexes.
  • the codebook index has a corresponding relationship with the corresponding PMI.
  • the codebook is predefined, and both the TRP and the UE store the corresponding codebook, and The understanding of the correspondence between each precoding matrix, codebook index and PMI in the codebook is consistent.
  • the UE After the UE selects a precoding matrix from the defined codebook and determines the codebook index according to the estimated downlink channel, only the PMI corresponding to the selected precoding matrix needs to be fed back to the TRP, and the TRP can be The PMI fed back by the UE determines a specific precoding matrix.
  • this embodiment proposes a A codebook based channel state information feedback method, in which a new codebook structure is proposed to be applied to a multi-panel antenna array.
  • the method provided by the embodiment of the present invention is described in detail below by using specific embodiments. In the embodiment described below, the name of the above base station becomes TRP.
  • FIG. 3 is a schematic flowchart of a method for feeding back channel state information based on a codebook according to an embodiment of the present invention. As shown in FIG. 3, the method includes:
  • the UE determines a target precoding matrix in a pre-generated codebook.
  • the UE sends a precoding matrix indication PMI to the TRP, where the PMI is used to indicate a parameter value corresponding to the target precoding matrix and the block codebook difference parameter.
  • the TRP determines a target precoding matrix from the pre-generated codebook according to the PMI.
  • S301 and S302 are optional steps.
  • This embodiment mainly relates to a process in which a UE sends a PMI to a TRP, and a process in which the TRP receives a PMI sent by the UE.
  • the TRP may configure a reference signal to the UE in advance, where the reference signal may be a CSI-RS, and the UE performs channel estimation according to the reference signal, and selects a target in the pre-generated codebook according to a preset criterion.
  • the preset criterion may be a channel capacity maximum criterion, or a transport block size maximum criterion, or a signal dry ratio maximum criterion.
  • the embodiment of the present invention does not specifically limit the specific implementation process of the UE selecting the target precoding matrix from the codebook. It can be seen that each precoding matrix in the codebook corresponds to one or more codebook indexes, and usually the codebook index has a corresponding relationship with the corresponding PMI, so the PMI can be used to indicate the precoding matrix.
  • the UE may determine a PMI for indicating the target precoding matrix according to the foregoing correspondence, and send the PMI to the base station.
  • the PMI may not only indicate the target precoding matrix, but also may indicate the parameter value corresponding to the block codebook difference parameter.
  • the target precoding matrix is a precoding matrix in the codebook, that is, a precoding matrix selected from the codebook.
  • the structure of the codebook provided by the embodiment of the present invention is described below.
  • At least part of the precoding matrix in the codebook is obtained by transforming a precoding matrix in the block codebook and a parameter value corresponding to the block codebook difference parameter.
  • the number of block codebooks is at least two, and the block codebook is composed of a preset precoding matrix.
  • the number of block codebooks is M1
  • M2 is the number of antenna panels in the vertical dimension. That is, the number of block codebooks has a corresponding relationship with the number of antenna panels. That is, the block codebook in the horizontal dimension corresponds to the antenna panel in the horizontal dimension, and the block codebook in the vertical dimension corresponds to the antenna panel in the vertical dimension.
  • the precoding matrix in each block codebook is composed of vectors.
  • the vector may be, for example, a Discrete Fourier Transform (DFT) vector.
  • DFT Discrete Fourier Transform
  • the length of the vector has a correspondence with the number of CSI-RS ports of the antenna panel. For example, in the horizontal dimension, the number of CSI-RS ports per panel is K 1 , and the vector length of the precoding matrix in the block codebook in the horizontal dimension is K 1 , and the CSI of each panel in the vertical dimension - The number of RS ports is K 2 , and the vector length corresponding to the precoding matrix in the block codebook in the vertical dimension is K 2 .
  • DFT Discrete Fourier Transform
  • the block code difference parameter may be a difference parameter such as a phase difference or a modulus difference.
  • the precoding matrix in the codebook can be obtained by transforming the parameter values corresponding to the precoding matrix and the block code difference parameter in the block codebook. The transformation may be multiplied by the two, or divided, or other operational relationships, which are not particularly limited herein.
  • the number of parameter values has a corresponding relationship with the number of block codebooks. For example, the number of the two may be equal, or the number of parameter values may be less than the number of block codebooks. For example, when discussing the phase difference between adjacent panels in the horizontal dimension, since each panel corresponds to one block codebook, the number of phase differences is one less than the number of block codebooks.
  • the UE may obtain from the codebook configuration parameters.
  • the codebook configuration parameter includes the number of block codebooks in the codebook and the length of a vector corresponding to the precoding matrix in the block codebook.
  • the codebook configuration parameter is sent to the UE in advance by the TRP.
  • the TRP may send high-level signaling or physical layer signaling to the UE, where the high-level signaling or physical layer signaling carries the codebook configuration parameter.
  • the high layer signaling may be Radio Resource Control (RRC) signaling
  • the physical layer signaling may be Downlink Control Information (DCI).
  • RRC Radio Resource Control
  • DCI Downlink Control Information
  • the codebook configuration parameters include: the number of block codebooks of the horizontal dimension and the block codebook of the horizontal dimension The length of the vector corresponding to the precoding matrix, the number of block codes of the horizontal dimension is at least two; and the number of block codebooks of the vertical dimension and the length of the vector corresponding to the precoding matrix in the block codebook of the vertical dimension, The number of block codebooks in the vertical dimension is at least two.
  • the PMI sent by the UE to the TRP may be specifically implemented by the following implementation manner.
  • the PMI includes a first PMI corresponding to the CSI of the broadband and a second PMI corresponding to the CSI of the subband, and the first PMI or the second PMI is used to indicate a parameter value corresponding to the block codebook difference parameter.
  • the existing PMI includes a first PMI and a second PMI, and an indication field may be added in the first PMI or the second PMI, where the indication field is used to indicate a parameter value corresponding to the block codebook parameter.
  • a parameter value index number may be set in the indication domain, and different index numbers correspond to different parameter values.
  • the PMI includes a first PMI corresponding to the CSI of the broadband, a second PMI corresponding to the narrowband CSI, and a third PMI, where the third PMI is used to indicate a parameter value corresponding to the block codebook difference parameter.
  • a third PMI may also be added, where the third PMI is used to indicate a parameter value corresponding to the block codebook difference parameter.
  • the base station may also generate a corresponding codebook according to the codebook configuration parameter. Therefore, the base station may determine a specific target precoding matrix according to the PMI fed back by the UE. For example, the first PMI corresponds to two codebook indexes, the second PMI corresponds to one codebook index, and the base station can determine a specific target precoding matrix according to the codebook index.
  • the UE sends a precoding matrix indication PMI to the TRP, where the PMI is used to indicate a parameter value corresponding to the target precoding matrix and the block codebook difference parameter, and the target pre
  • the coding matrix is a precoding matrix in the codebook, and at least part of the precoding matrix in the codebook is obtained by transforming a precoding matrix and a parameter value in the block codebook, thereby introducing a parameter value corresponding to the block codebook difference parameter into the code.
  • the codebook includes difference parameters such as a phase difference and a modulus difference between adjacent panels, thereby ensuring beam directivity and improving system performance.
  • FIG. 4 is a schematic diagram 1 of an antenna panel and a beam according to an embodiment of the present invention.
  • the DFT vectors corresponding to the respective codebooks are DFT vectors corresponding to the beams of the same transmission angle
  • the DFT vectors corresponding to the respective codebooks are combined into a DFT vector corresponding to the transmit beam by splicing or the like.
  • all antenna ports can be divided into N groups (the value of N can be 2, 4, 8, etc.), and the number of CSI-RS ports in the horizontal dimension in each group is K. 1.
  • the number of CSI-RS ports in the vertical dimension is K 2 .
  • the total number of antenna ports is 2*N*K 1 *K 2 .
  • ⁇ r 2 ⁇ i 3, r /X
  • X can be the value in the set ⁇ 2, 4, 8, ... ⁇ .
  • W 1 is indicated by the first PMI, which is a broadband PMI, A matrix representing a dimension of K 1 K 2 ⁇ B, where each column corresponds to a DFT vector.
  • W 2 is indicated by a second PMI, which is a sub-band PMI. Is a vector of dimension B ⁇ 1, where the i-th element is 1, and the remaining elements are 0.
  • n represents a function of the second PMI
  • e represents a natural constant
  • j represents a unit imaginary number
  • ⁇ represents a pi.
  • all antenna ports can be divided into N groups (the value of N can be 2, 4, 8, etc.), and the number of CSI-RS ports in the horizontal dimension in each group is K 1 , vertical dimension The number of CSI-RS ports is K 2 , so the total number of antenna ports is 2*N*K 1 *K 2 (corresponding to a dual-polarized antenna).
  • the block code difference parameter is a phase difference
  • the structure of the precoding matrix in the codebook is specifically as shown in the following formula 1.1:
  • ⁇ r 2 ⁇ i 3, r /X, X can be the value in the set ⁇ 2, 4, 8, ... ⁇ .
  • I 2B represents an identity matrix having a dimension of 2B ⁇ 2B.
  • W 1 is indicated by the first PMI, which is a broadband PMI, A matrix representing a dimension of K 1 K 2 ⁇ B, where each column corresponds to a DFT vector.
  • W 2 is indicated by a second PMI, which is a sub-band PMI. Is a vector of dimension B ⁇ 1, where the i-th element is 1, and the remaining elements are 0.
  • n represents a function of the second PMI
  • e represents a natural constant
  • j represents a unit imaginary number
  • ⁇ represents a pi.
  • all antenna ports can be divided into N groups (the value of N can be 2, 4, 8, etc.), and the number of CSI-RS ports in the horizontal dimension in each group is K 1 , vertical dimension The number of CSI-RS ports is K 2 , so the total number of antenna ports is 2*N*K 1 *K 2 (corresponding to a dual-polarized antenna).
  • the block code difference parameter is a phase difference
  • the structure of the precoding matrix in the code book may be specifically as follows:
  • W 1 is indicated by a first PMI, which may be a broadband PMI, A matrix representing a dimension of K 1 K 2 ⁇ B, where each column corresponds to a DFT vector.
  • W 2 is indicated by a second PMI, which may be a sub-band PMI.
  • I s a vector of dimension B ⁇ 1, where the i-th element is 1, and the remaining elements are 0.
  • n represents a function of the second PMI.
  • ⁇ r 2 ⁇ i 2
  • X may be a value in the set ⁇ 2, 4, 8, ... ⁇ .
  • e represents a natural constant
  • j represents a unit imaginary number
  • ⁇ represents a pi.
  • W 1 is indicated by a first PMI, which may be a broadband PMI, A matrix representing a dimension of K 1 K 2 ⁇ B, where each column corresponds to a DFT vector.
  • W 2 is indicated by a second PMI, which is a sub-band PMI. Is a vector with a dimension of K 1 K 2 ⁇ 1, where the i-th element is 1 and the remaining elements are 0. Indicates the phase difference between the two polarization directions of the antenna, and n represents a function of the second PMI.
  • ⁇ r 2 ⁇ i 3, r /X
  • X can be the value in the set ⁇ 2, 4, 8, ... ⁇ .
  • e represents a natural constant
  • j represents a unit imaginary number
  • ⁇ represents a pi.
  • all antenna ports are divided into N groups (the value of N can be 2, 4, 8, etc.), and the number of CSI-RS ports in the horizontal dimension in each group is K 1 , vertical dimension The number of CSI-RS ports is K 2 , so the total number of antenna ports is 2*N*K 1 *K 2 (corresponding to a dual-polarized antenna).
  • the structure of the precoding matrix in the codebook may be:
  • N can represent the number of antenna port groups, and can also indicate the number of antenna panels.
  • c 0,0,1 ,c 0,1,1 ,...,c N-1,0,1 ,c N-1,1,1 indicates the phase factor or phase difference between antenna port groups, or indicates different
  • the phase factor between the antenna ports of the antenna panel is either a phase difference or a phase factor or a phase difference between antenna ports representing different polarization directions.
  • c 0,0,1 , c 0,1,1 ,...,c N-1,0,1 ,c N-1,1,1 may be a function of the first PMI, the second PMI or the third PMI.
  • the first PMI is a wideband PMI
  • the second PMI is a subband PMI
  • the third PMI is a wideband PMI or a subband PMI.
  • b l,m denotes a 2-dimensional DFT vector of length K 1 *K 2 , which may be, for example, a Kronecker product of two 1-dimensional DFT vectors.
  • l and m represent functions of the first PMI, which may be a wideband PMI.
  • n a function of the second PMI, which takes the value ⁇ 0, 1, 2, 3 ⁇ , and the second PMI may be a broadband PMI or may be Subband PMI.
  • e represents a natural constant
  • j represents a unit imaginary number
  • ⁇ represents a pi
  • v l denotes the length of a vector of K DFT
  • the CSI-RS K 1 is the number of ports in each packet the horizontal dimension
  • u m represents a vector of length 2 K DFT
  • the CSI-RS K 2 is the number of ports in each packet vertical dimension
  • N can indicate the number of antenna port groups, and can also indicate the number of antenna panels.
  • rank 2 codebook can be:
  • the precoding matrix corresponding to each antenna port group of the first data layer is represented, and the corresponding PMI feedback method is similar to rank 1.
  • n Indicates the phase difference between the two polarization directions of the antenna or where n represents a function of the second PMI, taking the value ⁇ 0, 1, 2, 3 ⁇ .
  • e represents a natural constant
  • j represents a unit imaginary number
  • ⁇ represents a pi
  • v l represents a DFT vector of length K 1
  • u m represents a vector of length 2 K DFT
  • ⁇ N-1) packets represent different antenna ports
  • the value may be ⁇ +1, -1, +j, -j ⁇ ;
  • the O 1 and the O 2 represent oversampling factors, Represents Kronecker.
  • N can indicate the number of antenna port groups, and can also indicate the number of antenna panels.
  • the codebook matrix structure of rank 1 can also be:
  • v l, m represents the length of K 1 ⁇ K vector 2
  • K 1 is the number of CSI-RS ports of each packet in the horizontal dimension.
  • u m represents a vector of length 2 K DFT
  • the CSI-RS K 2 is the number of ports in each packet vertical dimension.
  • l and m represent functions of the first PMI, which may be a wideband PMI. among them, Indicates the phase difference between the two polarization directions of the antenna or where n represents a function of the second PMI, which takes the value ⁇ 0, 1, 2, 3 ⁇ , and the second PMI may be a wideband PMI or a subband PMI.
  • N can indicate the number of antenna port groups, and can also indicate the number of antenna panels.
  • the rank 2 codebook matrix structure can be:
  • the precoding matrix corresponding to each antenna port group of the first data layer is represented, and the corresponding PMI feedback method is similar to rank 1.
  • v l, m represents a vector of length K 1 K 2
  • K 1 is the CSI-RS ports for each packet number in the horizontal dimension
  • u m represents a vector of length 2 K DFT
  • the CSI-RS K 2 is the number of ports in each packet vertical dimension
  • m 1,2.
  • l and m represent functions of the first PMI, which may be a wideband PMI. among them, Indicates the phase difference between the two polarization directions of the antenna or where n represents a function of the second PMI, taking the value ⁇ 0, 1, 2, 3 ⁇ .
  • e is a natural constant
  • j is a unit imaginary number
  • ⁇ is a pi
  • ⁇ N-1 represents a phase difference parameter or phase factor between different antenna port groups, or a phase difference parameter between antenna panels Or phase factor,
  • the value may be ⁇ +1, -1, +j, -j ⁇ ; the O 1 and the O 2 represent oversampling factors, Represents Kronecker.
  • N can indicate the number of antenna port groups, and can also indicate the number of antenna panels.
  • (a 1 , . . . , a N ) represents an amplitude factor, 0 ⁇ a 1 , . . . , a N ⁇ 1.
  • the PMI that the user feeds back to the base station includes a first PMI, a second PMI, and a third PMI, where the first PMI corresponds to two codebook indexes, and the two codebook indexes are referred to as the first A horizontal codebook index and a first vertical codebook index, the second PMI corresponding to the second codebook index, and the third PMI corresponding to the third codebook index.
  • the value of n is indicated by the second codebook index
  • the value of m is indicated by the first vertical codebook index, or by the first vertical codebook index and the second codebook index
  • the value of l is determined by the first horizontal codebook.
  • the index indication is either indicated by the first horizontal codebook index and the second codebook index.
  • the first PMI is a broadband PMI
  • the second PMI is a sub-band PMI
  • the third PMI may be a broadband PMI or a sub-band PMI.
  • the PMI that the user feeds back to the base station includes a first PMI and a second PMI, where the first PMI corresponds to two codebook indexes.
  • the two codebook indexes are referred to as a first horizontal codebook.
  • the index and the first vertical codebook index, and the second PMI corresponds to the second codebook index.
  • the value of n is indicated by a second codebook index
  • the value of n is indicated by a second codebook index
  • the value of m is indicated by a first vertical codebook index
  • a first vertical codebook index and a second codebook index It is indicated that the value of l is indicated by the first horizontal codebook index or by the first horizontal codebook index and the second codebook index.
  • ( ⁇ 1 ... ⁇ N-1 ) may be indicated by a first codebook index
  • the first PMI is a broadband PMI
  • the second PMI is a sub-band PMI
  • ( ⁇ 1 ... ⁇ N-1 ) may also be indicated by a second codebook index, for example, the second codebook index contains N+1 values, wherein one value i 2, N+1 is used to determine the antenna Phase difference between polarization directions
  • the first PMI is a broadband PMI
  • the second PMI is a sub-band PMI.
  • the amplitude factor example is similar.
  • the antenna may be a dual-polarized antenna or a single-polarized antenna, and each panel may have two antennas with polarization directions at the same time, or an antenna with only one polarization direction (ie, two poles) The antenna in the direction is distributed on two panels).
  • all antenna ports are divided into N groups (the value of N may be 2, 4, 8, etc.), for example, each packet corresponds to an antenna port of one polarization direction on one antenna panel.
  • the number of CSI-RS ports in the horizontal dimension is K 1
  • the number of CSI-RS ports in the vertical dimension is K 2
  • the total number of antenna ports is N*K 1 *K 2 .
  • the block code difference parameter is a phase difference
  • the structure of the precoding matrix in the rank 1 codebook is specifically as follows:
  • v l denotes the length of a vector of K DFT
  • the CSI-RS K 1 is the number of ports in each packet the horizontal dimension
  • u m represents a vector of length 2 K DFT
  • the CSI-RS K 2 is the number of ports in each packet vertical dimension
  • l is a function of the level of a first codebook index, having a first correspondence between the PMI
  • the m is a function of the first vertical codebook index and has a corresponding relationship with the first PMI.
  • the O 1 and the O 2 represent an oversampling factor, Represents Kronecker.
  • e is a natural constant
  • j is a unit imaginary number
  • ⁇ is a pi
  • ⁇ N-1 represents a phase difference parameter or phase factor between different antenna port groups, or an antenna port representing a different polarization direction.
  • the phase factor between them, or the phase difference parameter or phase factor between the antenna panels The value can be ⁇ +1, -1, +j, -j ⁇ ; N can represent the number of antenna port groups, and can also represent the number of antenna panels.
  • the precoding matrix structure in the rank 2 codebook can be any precoding matrix structure in the rank 2 codebook.
  • the precoding matrix corresponding to each antenna port group of the first data layer is represented, and the corresponding PMI feedback method is similar to rank 1.
  • the O 1 and the O 2 represent an oversampling factor, Represents Kronecker.
  • e is a natural constant
  • j is a unit imaginary number
  • ⁇ is a pi
  • ( ⁇ 1 ... ⁇ N-1 ) represents a phase difference parameter or phase factor between different antenna port groups, or an antenna port representing a different polarization direction.
  • the phase factor between them, or the phase difference parameter or phase factor between the antenna panels The value can be ⁇ +1, -1, +j, -j ⁇ ; N can represent the number of antenna port groups, and can also represent the number of antenna panels.
  • v l m represents a vector of length K 1 K 2
  • K 1 is the number of CSI-RS ports of each packet in the horizontal dimension
  • u m represents a vector of length 2 K DFT
  • the CSI-RS K 2 is the number of ports in each packet vertical dimension.
  • the O 1 and the O 2 represent an oversampling factor
  • the l is a function of a first level codebook index, and has a corresponding relationship with the first PMI
  • the first PMI may be a broadband PMI
  • the m is a A function of a vertical codebook index has a correspondence with the first PMI.
  • the O 1 and the O 2 represent an oversampling factor, Represents Kronecker.
  • e is a natural constant
  • j is a unit imaginary number
  • ⁇ is a pi
  • ( ⁇ 1 ... ⁇ N-1 ) represents a phase difference parameter or phase factor between different antenna port groups, or an antenna port representing a different polarization direction.
  • the phase factor between them, or the phase difference parameter or phase factor between the antenna panels The value can be ⁇ +1, -1, +j, -j ⁇ ; N can represent the number of antenna port groups, and can also represent the number of antenna panels.
  • the structure of the precoding matrix in the rank 2 codebook can be any precoding matrix in the rank 2 codebook.
  • the precoding matrix corresponding to each antenna port group of the first data layer is represented, and the corresponding PMI feedback method is similar to rank 1.
  • the l is a function of the first horizontal codebook index, and has a corresponding relationship with the first PMI, where the m is a function of the first vertical codebook index, and has a corresponding relationship with the first PMI.
  • the O 1 and the O 2 represent an oversampling factor, Represents Kronecker. Where e is a natural constant, j is a unit imaginary number, ⁇ is a pi, and ( ⁇ 1 ...
  • ⁇ N-1 represents a phase difference parameter or phase factor between different antenna port groups, or an antenna port representing a different polarization direction.
  • the phase factor between them, or the phase difference parameter or phase factor between the antenna panels The value can be ⁇ +1, -1, +j, -j ⁇ ; N can represent the number of antenna port groups, and can also represent the number of antenna panels.
  • (a 1 , . . . , a N ) represents an amplitude factor, 0 ⁇ a 1 , . . . , a N ⁇ 1.
  • the PMI that the user feeds back to the base station includes a first PMI and a second PMI, where the first PMI corresponds to two codebook indexes.
  • the two codebook indexes are referred to as a first horizontal codebook index and The first vertical codebook index
  • the second PMI corresponds to the second codebook index.
  • the value of n is indicated by the second codebook index
  • the value of m is indicated by the first vertical codebook index, or by the first vertical codebook index and the second codebook index
  • the value of l is determined by the first horizontal codebook.
  • the index indication is either indicated by the first horizontal codebook index and the second codebook index.
  • ( ⁇ 1 ... ⁇ N-1 ) represents a difference parameter between different antenna port groups, such as a phase difference;
  • the first PMI i 1,1 and i 1,2 are wideband PMI
  • the second PMI i 2,1 , i 2,2, i 2,3, i 2,4 is a subband PMI, or a part of the value is Broadband PMI, another part of the value is subband PMI.
  • the amplitude factor example is similar.
  • the structure of the precoding matrix in the code book is specifically as shown in the following formula 1.1:
  • the formula can also be:
  • v l represents a precoding matrix in the codebook obtained by transforming the parameter values corresponding to the N 1 block codebook of the horizontal dimension and the block codebook difference parameter;
  • v l denotes the codebook each block is a vector of length K 1 composition, K 1 is the number of the CSI-RS ports of the horizontal dimension of the codebook corresponding to each of the blocks, [theta] represents the horizontal dimension of the phase difference parameter, a phase difference between precoding vectors in different block codes representing horizontal dimensions;
  • u m represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 2 block codebook of a vertical dimension, u m represents each block of length K codebook vectors composed of 2, K 2 is the number of the vertical dimension of each codebook corresponding to the CSI-RS ports; [Phi] phase difference parameter
  • ⁇ N2 represents a phase difference between precoding matrices in different block codebooks of a vertical dimension; said O 1 and said O 2 represent oversampling factors, said l, m, n being functions of a codebook index
  • the codebook index has a corresponding relationship with the PMI, and the j is a unit imaginary number, Represents Kronecker.
  • v l denotes the length of a vector of K DFT
  • the CSI-RS K 1 is the number of ports in each packet the horizontal dimension
  • u m represents a vector of length 2 K DFT
  • the CSI-RS K 2 is the number of ports in each packet vertical dimension
  • v l m represents a vector of length K 1 K 2
  • K 1 is the number of CSI-RS ports of each packet in the horizontal dimension
  • u m represents a vector of length 2 K DFT
  • the CSI-RS K 2 is the number of ports in each packet vertical dimension.
  • the O 1 and the O 2 represent an oversampling factor.
  • the manner of indicating the phase difference by PMI can be divided into the following possible ways.
  • the PMI includes a first PMI and a second PMI, where the first PMI corresponds to two codebook indexes.
  • the two codebook indexes are referred to as a first horizontal codebook index and a first vertical codebook index.
  • the second PMI corresponds to the second codebook index.
  • Phase difference Indicated by the first horizontal codebook index the phase difference ( ⁇ 1 ... ⁇ N2 ) is indicated by the first vertical codebook index.
  • the value of n is indicated by a second codebook index
  • the value of m is indicated by a first vertical codebook index and a second codebook index
  • the value of l is determined by the first horizontal codebook index and the second codebook. Index to indicate.
  • i 1,1 represents the first horizontal codebook index
  • i 1,2 represents the first vertical codebook index
  • i 2 represents the second codebook index
  • this embodiment is not particularly limited herein.
  • the PMI includes a first PMI and a second PMI, where the first PMI corresponds to two codebook indexes.
  • the two codebook indexes are referred to as a first horizontal codebook index and a first vertical codebook index.
  • the second PMI corresponds to the second codebook index.
  • n phase difference ( ⁇ 1 ... ⁇ N2 ) and phase difference
  • the value is indicated by the second codebook index.
  • the value of m is indicated by the first vertical codebook index and the second codebook index
  • the value of l is indicated by the first horizontal codebook index and the second codebook index.
  • the value of the second PMI may also correspond to two codebook indexes.
  • the two codebook indexes are referred to as a second horizontal codebook index and a second vertical codebook index.
  • the phase difference ( ⁇ 1 ... ⁇ N2 ) is indicated by the second vertical codebook index, Indicated by the second horizontal codebook index, the value of n is indicated by the second vertical codebook index and the second horizontal codebook index.
  • the value of m is indicated by a first vertical codebook index and a second vertical codebook index, the value of l being indicated by a first horizontal codebook index and a second horizontal codebook index.
  • the PMI includes a first PMI, a second PMI, and a third PMI, where the first PMI corresponds to two codebook indexes.
  • the two codebook indexes are referred to as a first horizontal codebook index and first.
  • the vertical codebook index, the second PMI corresponds to the second codebook index, and the third PMI corresponds to the third codebook index.
  • Phase difference ( ⁇ 1 ... ⁇ N2 ) and The value is indicated by the third codebook index.
  • the value of n is indicated by a second codebook index.
  • the value of m is indicated by the first vertical codebook index and the second codebook index
  • the value of l is indicated by the first horizontal codebook index and the second codebook index.
  • the third PMI may also correspond to two codebook indexes.
  • the two codebook indexes are referred to as a third vertical codebook index and a third horizontal codebook index.
  • the value of ( ⁇ 1 ... ⁇ N2 ) is indicated by the third vertical codebook index
  • the value is indicated by the third horizontal codebook index.
  • the third horizontal codebook index contains multiple values X can be a value in the set ⁇ 2, 4, 8, ... ⁇ ; the third vertical codebook index contains multiple values X can be the value in the set ⁇ 2, 4, 8 ⁇ .
  • the first PMI is a broadband PMI
  • the second PMI is a sub-band PMI
  • the third PMI may be a broadband PMI or a sub-band PMI.
  • the UE can estimate the channel according to the reference signal, and determine according to the with And the codebook index, and then the PMI corresponding to the codebook index is fed back to the base station, and the codebook index corresponding to the PMI is obtained on the base station side, and the code base index is obtained.
  • Value, according to Value and A target precoding matrix can be obtained.
  • the structure of the precoding matrix in the code book is specifically as shown in the following formula 1.2:
  • the structure of the precoding matrix in the codebook is specifically as shown in the following formula 1.2:
  • the formula can be:
  • v l, ⁇ [v l ⁇ 1 v l ... ⁇ N1 v l ], optionally, may be
  • the v l, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 1 block codebook of a horizontal dimension;
  • v l denotes the codebook each block is a vector of length K 1 composition, K 1 is the number of the CSI-RS ports of the horizontal dimension of the codebook corresponding to each of the blocks, the horizontal dimension beta] modulo value representative of a difference parameter, a modulus difference between precoding matrices in different block codebooks representing horizontal dimensions;
  • u m ⁇ represents the vertical dimension of block N 2 N 2 corresponding to the codebook vectors th DFT;
  • Each block u m represents the codebook vectors of length 2 K DFT composition, the amount of K 2 is a vertical dimension
  • the manner in which the modulus difference is indicated by the PMI can be divided into the following possible implementation manners.
  • the PMI includes a first PMI and a second PMI, where the first PMI corresponds to two codebook indexes.
  • the two codebook indexes are referred to as a first horizontal codebook index and a first vertical codebook index.
  • the second PMI corresponds to the second codebook index.
  • Modulus difference Indicated by the first horizontal codebook index the modulus difference Indicated by the first vertical codebook index.
  • the value of n is indicated by a second codebook index
  • the value of m is indicated by a first vertical codebook index and a second codebook index
  • the value of l is determined by the first horizontal codebook index and the second codebook. Index to indicate.
  • the PMI includes a first PMI and a second PMI, where the first PMI corresponds to two codebook indexes.
  • the two codebook indexes are referred to as a first horizontal codebook index and a first vertical codebook index.
  • the second PMI corresponds to the second codebook index.
  • n with The value is indicated by the second codebook index.
  • the value of m is indicated by the first vertical codebook index and the second codebook index
  • the value of l is indicated by the first horizontal codebook index and the second codebook index.
  • the value of the second PMI may also correspond to two codebook indexes.
  • the two codebook indexes are referred to as a second horizontal codebook index and a second vertical codebook index.
  • the value of n is indicated by the second vertical codebook index and the second horizontal codebook index.
  • the value of m is indicated by a first vertical codebook index and a second vertical codebook index, the value of l being indicated by a first horizontal codebook index and a second horizontal codebook index.
  • the PMI includes a first PMI, a second PMI, and a third PMI, where the first PMI corresponds to two codebook indexes.
  • the two codebook indexes are referred to as a first horizontal codebook index and first.
  • the vertical codebook index, the second PMI corresponds to the second codebook index, and the third PMI corresponds to the third codebook index.
  • the value is indicated by the third codebook index.
  • the value of n is indicated by a second codebook index.
  • the value of m is indicated by the first vertical codebook index and the second codebook index
  • the value of l is indicated by the first horizontal codebook index and the second codebook index.
  • the third PMI may also correspond to two codebook indexes.
  • the two codebook indexes are referred to as a third vertical codebook index and a third horizontal codebook index. at this time, The value is indicated by the third vertical codebook index. The value is indicated by the third horizontal codebook index.
  • the UE can estimate the channel according to the reference signal, and determine according to the with And the codebook index, and then the PMI corresponding to the codebook index is fed back to the base station, and the codebook index corresponding to the PMI is obtained on the base station side, and the code base index is obtained. Value, according to Value and A target precoding matrix can be obtained.
  • FIG. 5 is a schematic diagram 2 of an antenna panel and a beam according to an embodiment of the present invention.
  • the vector corresponding to each block code may be a DFT vector corresponding to a beam of the same transmission angle or a DFT vector corresponding to a beam of a different transmission angle, by splicing the DFT vector corresponding to each block codebook. Synthesized into a DFT vector corresponding to the transmit beam.
  • the structure of the precoding matrix in the codebook is as shown in Equation 1.3:
  • the formula can also be:
  • v l, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 1 block codebook of a horizontal dimension
  • v l denotes the codebook each block is a vector of length K 1 composition
  • K 1 is the number of the CSI-RS ports of the horizontal dimension of the codebook corresponding to each of the blocks
  • [theta] represents the horizontal dimension of the phase difference parameter, a phase difference between precoding matrices in different block codebooks representing horizontal dimensions
  • ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 2 block codebook of a vertical dimension
  • u m represents each block of length K codebook vectors composed of 2
  • K 2 is the number of the vertical dimension of each codebook corresponding
  • ⁇ N2 represents a phase difference between precoding matrices in different block codebooks of a vertical dimension; said O 1 and said O 2 represent oversampling factors, said l, m, n being functions of a codebook index
  • the codebook index has a corresponding relationship with the PMI, and the j is a unit imaginary number, Represents Kronecker.
  • the manner of indicating the phase difference by PMI can be divided into the following possible ways.
  • the PMI includes a first PMI and a second PMI, where the first PMI corresponds to two codebook indexes.
  • the two codebook indexes are referred to as a first horizontal codebook index and a first vertical codebook index.
  • the second PMI corresponds to the second codebook index. ( ⁇ 1 ... ⁇ N2 ) is indicated by the first vertical codebook index, Indicated by the first horizontal codebook index.
  • the value of n is indicated by a second codebook index.
  • Indicated by the first vertical codebook index and the second codebook index It is jointly indicated by the first horizontal codebook index and the second codebook index.
  • it can also be: Indicated by the first vertical codebook index and the second codebook index. It is jointly indicated by the first horizontal codebook index and the second codebook index.
  • the first PMI may also correspond to the first horizontal codebook index, the differential first horizontal codebook index, the first vertical codebook index, and the differential first vertical codebook index.
  • ( ⁇ 1 ... ⁇ N2 ) is indicated by the first vertical codebook index
  • the value is indicated by the first horizontal codebook index.
  • the value of n is indicated by a second codebook index.
  • a preset functional relationship such as a linear relationship
  • the PMI includes a first PMI and a second PMI, where the first PMI corresponds to two codebook indexes.
  • the two codebook indexes are referred to as a first horizontal codebook index and a first vertical codebook index.
  • the second PMI corresponds to the second codebook index.
  • n ( ⁇ 1 ... ⁇ N2 ) and The value is indicated by the second codebook index. Indicated by the first vertical codebook index and the second codebook index together. Indicated by the first horizontal codebook index and the second codebook index together. Optional, it can also be Indicated by the first vertical codebook index and the second codebook index together. Indicated by the first horizontal codebook index and the second codebook index together.
  • the value of the second PMI may also correspond to two codebook indexes.
  • the two codebook indexes are referred to as a second horizontal codebook index and a second vertical codebook index.
  • ( ⁇ 1 ... ⁇ N2 ) is indicated by the second vertical codebook index
  • the value of n is indicated by the second vertical codebook index and the second horizontal codebook index together.
  • the first horizontal codebook index and the second horizontal codebook index together Indicated by the first horizontal codebook index and the second horizontal codebook index together.
  • it can also be Indicated by the first vertical codebook index and the second vertical codebook index together.
  • the PMI includes a first PMI, a second PMI, and a third PMI, where the first PMI corresponds to two codebook indexes.
  • the two codebook indexes are referred to as a first horizontal codebook index and first.
  • the vertical codebook index, the second PMI corresponds to the second codebook index
  • the third PMI corresponds to the third codebook index.
  • the value of n is indicated by the second codebook index.
  • the first vertical codebook index, the second codebook index and the third codebook index are collectively indicated.
  • the first horizontal codebook index, the second codebook index and the third codebook index are collectively indicated. ( ⁇ 1 ... ⁇ N2 ) and Indicated by the third codebook index.
  • the first vertical codebook index, the second codebook index and the third codebook index are collectively indicated.
  • the first horizontal codebook index, the second codebook index and the third codebook index are collectively indicated. ( ⁇ 1 ... ⁇ N2 ) and Indicated by the third codebook index.
  • the third PMI may also correspond to the third vertical codebook index and the third horizontal codebook index.
  • ( ⁇ 1 ... ⁇ N2 ) is indicated by the third vertical codebook index, Indicated by the third horizontal codebook index.
  • the first vertical codebook index, the second codebook index and the third vertical codebook index are collectively indicated. Indexed by the first horizontal codebook, the second codebook index and the third horizontal codebook index are collectively indicated.
  • the first vertical codebook index, the second codebook index and the third vertical codebook index are collectively indicated. Indexed by the first horizontal codebook, the second codebook index and the third horizontal codebook index are collectively indicated.
  • the UE can estimate the channel according to the reference signal, and determine according to the with And the codebook index, and then the PMI corresponding to the codebook index is fed back to the base station, and the codebook index corresponding to the PMI is obtained on the base station side, and the code base index is obtained. Value, according to Value and A target precoding matrix can be obtained.
  • the UE may further estimate a channel according to the reference signal on the UE side, and determine, according to the reference signal, with ( ⁇ 1 ... ⁇ N2 ), And the value of the sum n and the codebook index, and then the PMI corresponding to the codebook index is fed back to the base station, and the codebook index corresponding to the PMI is obtained on the base station side, and the code base index is obtained. ( ⁇ 1 ... ⁇ N2 ), And the value of n, according to ( ⁇ 1 ... ⁇ N2 ), And the value of n and A target precoding matrix can be obtained.
  • Equation 1.4 the structure of the precoding matrix in the codebook is as shown in Equation 1.4:
  • the formula can also be:
  • u m, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 2 block codebook of a vertical dimension; u m each represents a block of length K codebook vectors composed of 2, K 2 is the number of the vertical dimension of
  • the manner in which the modulus difference is indicated by the PMI can be classified into the following possible manners.
  • the PMI includes a first PMI and a second PMI, where the first PMI corresponds to two codebook indexes.
  • the two codebook indexes are referred to as a first horizontal codebook index and a first vertical codebook index.
  • the second PMI corresponds to the second codebook index. Indicated by the first vertical codebook index, Indicated by the first horizontal codebook index.
  • the value of n is indicated by a second codebook index.
  • Indicated by the first vertical codebook index and the second codebook index It is jointly indicated by the first horizontal codebook index and the second codebook index.
  • it can also be: Indicated by the first vertical codebook index and the second codebook index. It is jointly indicated by the first horizontal codebook index and the second codebook index.
  • the first PMI may also correspond to the first horizontal codebook index, the differential first horizontal codebook index, the first vertical codebook index, and the differential first vertical codebook index. Indicated by the first vertical codebook index, The value is indicated by the first horizontal codebook index. Optionally, the value of n is indicated by a second codebook index. at this time, There should be a preset functional relationship (such as a linear relationship), and is indicated by the first vertical codebook index, the differential first vertical codebook index, and the second codebook index, There should also be a preset functional relationship (such as a linear relationship) and is indicated by the first horizontal codebook index, the differential first horizontal codebook index, and the second codebook index.
  • a preset functional relationship such as a linear relationship
  • it can also be: There should be a preset functional relationship (such as a linear relationship), and is indicated by the first vertical codebook index, the differential first vertical codebook index, and the second codebook index, There should also be a preset functional relationship (such as a linear relationship) and is indicated by the first horizontal codebook index, the differential first horizontal codebook index, and the second codebook index.
  • a preset functional relationship such as a linear relationship
  • the PMI includes a first PMI and a second PMI, where the first PMI corresponds to two codebook indexes.
  • the two codebook indexes are referred to as a first horizontal codebook index and a first vertical codebook index.
  • the second PMI corresponds to the second codebook index.
  • n with The value is indicated by the second codebook index. Indicated by the first vertical codebook index and the second codebook index together. The first horizontal codebook index and the second codebook index are collectively indicated. Optionally, it can also be: Indicated by the first vertical codebook index and the second codebook index together. The first horizontal codebook index and the second codebook index are collectively indicated.
  • the value of the second PMI may also correspond to two codebook indexes.
  • the two codebook indexes are referred to as a second horizontal codebook index and a second vertical codebook index.
  • the value of n is indicated by the second vertical codebook index and the second horizontal codebook index together.
  • the first vertical codebook index and the second vertical codebook index together.
  • the first horizontal codebook index and the second horizontal codebook index together.
  • it can also be: Indicated by the first vertical codebook index and the second vertical codebook index together. Indicated by the first horizontal codebook index and the second horizontal codebook index together.
  • the PMI includes a first PMI, a second PMI, and a third PMI, where the first PMI corresponds to two codebook indexes.
  • the two codebook indexes are referred to as a first horizontal codebook index and first.
  • the vertical codebook index, the second PMI corresponds to the second codebook index
  • the third PMI corresponds to the third codebook index.
  • the value of n is indicated by the second codebook index.
  • the first vertical codebook index, the second codebook index and the third codebook index are collectively indicated.
  • the first horizontal codebook index, the second codebook index and the third codebook index are collectively indicated. with Indicated by the third codebook index.
  • the first vertical codebook index, the second codebook index and the third codebook index are collectively indicated.
  • the first horizontal codebook index, the second codebook index and the third codebook index are collectively indicated. with Indicated by the third codebook index.
  • the third PMI may also correspond to the third vertical codebook index and the third horizontal codebook index. at this time, Indicated by the third vertical codebook index, Indicated by the third horizontal codebook index.
  • the first vertical codebook index, the second codebook index and the third vertical codebook index are collectively indicated. Indexed by the first horizontal codebook, the second codebook index and the third horizontal codebook index are collectively indicated.
  • the UE can estimate the channel according to the reference signal, and determine according to the with And the codebook index, and then the PMI corresponding to the codebook index is fed back to the base station, and the codebook index corresponding to the PMI is obtained on the base station side, and the code base index is obtained. Value, according to Value and A target precoding matrix can be obtained.
  • the UE can estimate the channel according to the reference signal, and determine according to the with And the value of the sum n and the codebook index, and then the PMI corresponding to the codebook index is fed back to the base station, and the codebook index corresponding to the PMI is obtained on the base station side, and the code base index is obtained. And the value of n, according to And the value of n and A target precoding matrix can be obtained.
  • the vector corresponding to each block codebook is a weight vector corresponding to a plurality of beams adjacent to different angles.
  • FIG. 6 is a schematic diagram 3 of an antenna panel and a beam according to an embodiment of the present invention.
  • the DFT vector corresponding to each block code may be a DFT vector corresponding to a beam of the same transmission angle or a DFT vector corresponding to a beam of a different transmission angle, by splicing the DFT vector corresponding to each block codebook.
  • the mode is synthesized into a DFT vector corresponding to the transmit beam.
  • the structure of the precoding matrix in the codebook is specifically as shown in the following formula 2.9.
  • the K values obtained may be equal (if K values are equal, K values are equivalent to one value) Or not equal.
  • the K values obtained can be equal (if K values are equal, K values are equivalent to one value) Or not equal.
  • the value of K can be configured by higher layer signaling.
  • K 1 is the number of CSI-RS ports corresponding to each block codebook in the horizontal dimension
  • K 2 is the number of CSI-RS ports corresponding to each block codebook of the vertical dimension
  • O 1 and O 2 represent oversampling factors, functions of the l, m, n codebook indices.
  • Weighted weight At least one of them may be a phase weight, or an amplitude weight, or a product of a phase weight and an amplitude weight. Or / and, A part of it can be 0.
  • the UE can feed back two PMI information.
  • (m 1 , m 2 , . . . m K ) may be encoded using the codebook index corresponding to the first PMI, and fed back using the first PMI;
  • (l 1 , l 2 , . . . , L K ) may use the code corresponding to the first PMI This index is encoded and fed back using the first PMI.
  • (m′ 1 , m′ 2 , . . . m′ K ) may be encoded using a codebook index corresponding to the first PMI, and fed back using the first PMI; or (m 1 , m 2 , . . .
  • m K ) - (m' 1 , m' 2 , ... m' K ) may be encoded using a codebook index corresponding to the first PMI, fed back using the first PMI, or encoded using a codebook index corresponding to the second PMI, using Two PMIs provide feedback.
  • (l' 1 , l' 2 , ... l' K ) may be encoded using a codebook index corresponding to the first PMI, using a first PMI for feedback; or (l 1 , l 2 , ... l K ) - (l' 1 , l' 2 , ...
  • l' K may be encoded using the codebook index corresponding to the first PMI, fed back using the first PMI, or encoded using the codebook index corresponding to the second PMI, using the Two PMIs provide feedback.
  • Weighted weight At least one of the codes may be encoded using a codebook index corresponding to the first PMI, using the first PMI feedback, or may be encoded using a codebook index corresponding to the second PMI, using the second PMI feedback.
  • the codebook index coding corresponding to the first PMI and the second PMI may be used at the same time, and the first PMI and the second PMI feedback are used.
  • At least one of the weighted weights is a product of phase weights and amplitude weights, wherein the amplitude weights may use a first PMI feedback and the phase weights may use a second PMI feedback.
  • the amplitude weight or phase weight may comprise two components, wherein the first component uses a first PMI feedback and the second component uses a second PMI feedback.
  • the UE can also feed back three PMI information to the TRP.
  • (m 1 , m 2 , .m K )-(m′ 1 , m′ 2 , .m′ K ) may be encoded using a codebook index corresponding to the first PMI, using the first PMI for feedback, or using the second
  • the codebook index corresponding to the PMI is encoded, and the second PMI is used for feedback; or the codebook index corresponding to the third PMI is used for encoding, and the third PMI is used for feedback.
  • l' K may be encoded using the codebook index corresponding to the first PMI, using the first PMI for feedback, or using the second
  • the codebook index corresponding to the PMI is encoded, and the second PMI is used for feedback; or the codebook index corresponding to the third PMI is used for encoding, and the third PMI is used for feedback.
  • Weighted weight At least one of the first PMI, the second PMI, and the third PMI may use at least one of the feedback.
  • At least one weighted weight is a product of a phase weight and an amplitude weight
  • the amplitude weight may use at least one of a first PMI, a second PMI, and a third PMI
  • the phase weight may use the first PMI At least one feedback in the second PMI, the third PMI.
  • the codebook-based channel state information feedback method provided by the foregoing embodiment of the present invention can ensure beam directivity under the multi-panel antenna structure, and can improve system performance relative to the existing codebook.
  • the design is simple and can guarantee the structural characteristics of the DFT codebook.
  • the codebook is generated by the codebook configuration parameter, and has good scalability.
  • Table 2 shows the performance comparison of the codebook in the 8-antenna scene.
  • the 8 antennas are divided into two groups of 4 antennas each.
  • the antenna spacing in the group is 0.5 times the wavelength, and the antenna spacing between the groups is 8 times the wavelength.
  • the DFT codebook is an LTE R10 codebook
  • the advanced codebook is a codebook scheme for phase compensation + adjacent beam selection proposed in the embodiment of the present invention, that is, the embodiment corresponding to FIG.
  • the codebook proposed by the embodiment of the present invention has a significant performance gain relative to the existing codebook.
  • the solution provided by the embodiment of the present invention is mainly introduced from the perspective of interaction between the TRP and the user equipment.
  • the TRP and the user equipment include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above functions.
  • the embodiments of the present invention can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the technical solutions of the embodiments of the present invention.
  • the embodiments of the present invention may divide the functional units of the TRP and the user equipment according to the foregoing method.
  • each functional unit may be divided according to each function, or two or more functions may be integrated into one processing unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present invention is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • FIG. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • the user equipment 100 includes a processing unit 12 and a communication unit 13.
  • the processing unit 12 is configured to control and manage the actions of the user equipment. For example, the processing unit 12 may determine the target precoding matrix in the pre-generated codebook.
  • the communication unit 13 is configured to support communication between the user equipment and the TRP, for example, sending a PMI to the TRP, and receiving a codebook configuration parameter sent by the TRP.
  • the user equipment may further include a storage unit 11 for storing program codes and data of the user equipment.
  • the processing unit 12 may be a processor, such as a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application-specific integrated circuit (Application-Specific Integrated Circuit). ASIC), Field Programmable Field Array Gate Array, FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the communication unit 13 is a communication interface such as a transceiver, a transceiver circuit, or the like.
  • the storage unit 11 may be a memory.
  • the processing unit 12 is a processor
  • the communication unit 13 is a communication interface
  • the storage unit 11 is a memory
  • the user equipment involved in the embodiment of the present invention may be the user equipment shown in FIG.
  • FIG. 8 is a schematic structural diagram of hardware of a user equipment according to an embodiment of the present invention.
  • the user equipment can include a communication interface 21, a processor 23, a memory 22, and at least one communication bus 20.
  • Communication bus 20 is used to implement a communication connection between components.
  • Memory 22 may include high speed RAM memory, and may also include non-volatile memory NVM, such as at least one disk memory, in which computer executable program code may be stored, the program code including instructions; when processor 22 executes the instructions The instructions cause the processor 22 to perform various processing functions and to implement the method steps of the present embodiment.
  • NVM non-volatile memory
  • FIG. 9 is a schematic structural diagram of a TRP according to an embodiment of the present invention.
  • the TRP 300 includes a processing unit 32 and a communication unit 33.
  • the communication unit 33 is configured to support communication between the TRP and the user equipment, and the processing unit 32 is configured to control and manage the actions of the TRP.
  • the processing unit 32 may determine a target precoding matrix in a pre-generated codebook according to the PMI, and the communication unit 33 may receive the PMI sent by the UE and send the codebook configuration parameter to the UE.
  • the TRP may also include a storage unit 31 for storing program codes and data of the user equipment.
  • the processing unit 32 may be a processor, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application-specific integrated circuit (Application-Specific Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the communication unit 33 can be a communication interface including a transceiver, a transceiver circuit, and the like.
  • the storage unit 31 may be a memory.
  • FIG. 10 is a schematic structural diagram of hardware of a TRP according to an embodiment of the present invention.
  • the TRP can include a communication interface 41, a processor 43, a memory 42, and at least one communication bus 40.
  • Communication bus 40 is used to implement a communication connection between components.
  • Memory 42 may include high speed RAM memory, and may also include non-volatile memory NVM, such as at least one disk memory, in which computer executable program code may be stored, the program code including instructions; when processor 42 executes the instructions The instructions cause the processor 42 to perform various processing functions and to implement the method steps of the present embodiment.
  • NVM non-volatile memory
  • FIG. 11 is a schematic structural diagram of a system on a chip according to an embodiment of the present invention.
  • the system on chip is applicable to user equipment, and the system on chip includes at least one communication interface 51, at least one processor 53, at least one memory 52, the communication interface 51, the memory 52, and Processors 53 are interconnected by a bus 50 that causes the user equipment to perform the methods described above by executing instructions stored in the memory.
  • FIG. 12 is a schematic structural diagram of a system on a chip according to an embodiment of the present invention.
  • the system on chip is applicable to a TRP, and the system on chip includes at least one communication interface 61, at least one processor 63, at least one memory 62, the communication interface 61, the memory 62, and processing.
  • the routers 63 are interconnected by a bus 60 that causes the TRP to perform the method described above by executing instructions stored in the memory.
  • Embodiment 1 A codebook-based channel state information feedback method includes:
  • the user equipment UE sends a precoding matrix indication PMI to the transmitting and receiving point TRP, where the PMI is used to indicate the target pre-editing a parameter value corresponding to the code matrix and the block code difference parameter;
  • the target precoding matrix is a precoding matrix in a codebook, where the codebook is a codebook pre-generated by the UE according to a codebook configuration parameter, and at least part of the precoding matrix in the codebook is a block code.
  • the precoding matrix and the parameter value are obtained by transforming, the number of the block codebooks is at least two, and the number of the parameter values has a correspondence relationship with the number of the block codebooks, and the codebook configuration
  • the parameter includes a number of block codebooks in the codebook and a length of a vector corresponding to a precoding matrix in the block codebook, the block codebook being composed of a preset precoding matrix.
  • Embodiment 2 The method according to Embodiment 1, wherein the block codebook comprises a block codebook of a horizontal dimension and a block codebook of a vertical dimension;
  • the codebook configuration parameter includes: a quantity of the block codebook of the horizontal dimension and a length of a vector corresponding to the precoding matrix in the block codebook of the horizontal dimension, where the number of block codebooks of the horizontal dimension is at least Two;
  • the PMI includes a first PMI corresponding to a CSI of a broadband and a second PMI corresponding to a CSI of a subband, the first PMI or the second PMI being used to indicate The parameter value corresponding to the block code difference parameter.
  • Embodiment 4 The method according to Embodiment 3, the first PMI is used to indicate the parameter value, the first PMI corresponds to two codebook indexes, and one codebook index is used to indicate a block of a horizontal dimension. a parameter value corresponding to the codebook difference parameter, and another codebook index is used to indicate a parameter value corresponding to the block codebook difference parameter of the vertical dimension; or
  • the second PMI is used to indicate the parameter value, and the second PMI is corresponding to two codebook indexes, where one codebook index is used to indicate a parameter value corresponding to a block codebook difference parameter of a horizontal dimension, and another codebook The index is used to indicate the parameter value corresponding to the block codebook difference parameter of the vertical dimension.
  • Embodiment 5 The method according to Embodiment 2, the PMI includes a first PMI corresponding to a CSI of a broadband, a second PMI corresponding to a CSI of a narrowband, and a third PMI, where the third PMI is used to indicate the The parameter value corresponding to the block code difference parameter.
  • Embodiment 6 The method according to embodiment 5, wherein the third PMI corresponds to two codebook indexes, wherein one codebook index is used to indicate a parameter value corresponding to a block codebook difference parameter of a horizontal dimension, and another codebook The index is used to indicate the parameter value corresponding to the block codebook difference parameter of the vertical dimension.
  • the method before the user equipment UE sends the precoding matrix indication PMI to the transmitting and receiving point TRP, the method further includes:
  • the UE receives the codebook configuration parameter sent by the TRP.
  • the method of the embodiment 7 is that the user equipment UE receives the codebook configuration parameters sent by the TRP, including:
  • the UE receives the high layer signaling or the physical layer signaling that is sent by the TRP, and the high layer signaling or the physical layer signaling carries the codebook configuration parameter.
  • Embodiment 10 The method according to Embodiment 9, if the block code difference parameter is a phase difference, the structure of the precoding matrix in the codebook is specifically as shown in the following formula 1.1:
  • the v l, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to the N 1 block codebook of the horizontal dimension and the block codebook difference parameter, where [ ⁇ ] T represents a conjugate transpose operating;
  • v l denotes the codebook each block is a vector of length K 1 composition, K 1 is the number of the CSI-RS ports of the horizontal dimension of the codebook corresponding to each of the blocks, [theta] represents the horizontal dimension of the phase difference parameter, a phase difference between precoding matrices in different block codebooks representing horizontal dimensions;
  • [ ⁇ ] T represents a conjugate transpose operation.
  • u m represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 2 block codebook of a vertical dimension, u m represents each block of length K codebook vectors composed of 2, K 2 is the number of the vertical dimension of each codebook corresponding to the CSI-RS ports; [Phi] phase difference parameter representative of the vertical dimension, ( ⁇ 1 ...
  • ⁇ N2 represents a phase difference between precoding matrices in different block codebooks of a vertical dimension; said O 1 and said O 2 represent oversampling factors, said l, m, n being functions of a codebook index
  • the codebook index has a corresponding relationship with the PMI, and the j is a unit imaginary number, Represents Kronecker.
  • Embodiment 11 The method according to the embodiment 9, if the block code difference parameter is a modulus difference, the structure of the precoding matrix in the code book is specifically as shown in the following formula 1.2:
  • u m, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 2 block codebook of a vertical dimension; u m represents each block of length K codebook vectors composed of 2, K 2 is the number of the vertical dimension of the codebook corresponding to each block of CSI-RS ports; [alpha] parameter representative of the modulus of the difference between the vertical dimension; a modulus difference between precoding matrices in different block codebooks representing vertical dimensions; said O 1 and said O 2 represent oversampling factors, said l, m, n being functions of a codebook index,
  • the codebook index has a corresponding relationship with the PMI, and the j is a unit imaginary number, Represents Kronecker.
  • Embodiment 13 The method according to Embodiment 12, if the block code difference parameter is a phase difference, the structure of the precoding matrix in the codebook is as shown in Formula 1.3:
  • ⁇ N2 represents a phase difference between precoding matrices in different block codebooks of a vertical dimension; said O 1 and said O 2 represent oversampling factors, said l, m, n being functions of a codebook index
  • the codebook index has a corresponding relationship with the PMI, and the j is a unit imaginary number, Represents Kronecker.
  • Embodiment 14 The method according to Embodiment 12, if the block code difference parameter is a modulus difference, the structure of the precoding matrix in the codebook is as shown in Equation 1.4:
  • the v l, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 1 block codebook of a horizontal dimension;
  • v l denotes the codebook each block is a vector of length K 1 composition, K 1 is the number of the CSI-RS ports of each of the block codes corresponding to this horizontal dimension, the horizontal dimension beta] modulo value representative of a difference parameter, a modulus difference between precoding matrices in different block codebooks representing horizontal dimensions;
  • [ ⁇ ] T represents a conjugate transpose operation
  • u m, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 2 block codebook of a vertical dimension;
  • u m each represents a block of length K codebook vectors composed of 2
  • K 2 is the number of the vertical dimension of the codebook corresponding to each block of CSI-RS
  • a codebook-based channel state information feedback method includes:
  • the sending and receiving point TRP receives a precoding matrix indicating PMI sent by the user equipment UE, where the PMI is used to indicate a parameter value corresponding to the target precoding matrix and the block codebook difference parameter;
  • the target precoding matrix is a precoding matrix in a codebook, where the codebook is a codebook pre-generated by the TRP according to a codebook configuration parameter, and at least part of the precoding matrix in the codebook is a block code.
  • the precoding matrix and the parameter value are obtained by transforming, the number of the block codebooks is at least two, and the number of the parameter values has a correspondence relationship with the number of the block codebooks, and the codebook configuration
  • the parameter includes a number of block codebooks in the codebook and a length of a vector corresponding to a precoding matrix in the block codebook, the block codebook being composed of a preset precoding matrix.
  • Embodiment 16 The method according to embodiment 15, wherein the block codebook comprises a block codebook of a horizontal dimension and a block codebook of a vertical dimension;
  • the codebook configuration parameter includes: a quantity of the block codebook of the horizontal dimension and a length of a vector corresponding to the precoding matrix in the block codebook of the horizontal dimension, where the number of block codebooks of the horizontal dimension is at least Two;
  • the PMI comprises a first PMI corresponding to a CSI of a broadband and a second PMI corresponding to a CSI of a subband, the first PMI or the second PMI being used to indicate The parameter value corresponding to the block code difference parameter.
  • the first PMI is used to indicate the parameter value
  • the first PMI corresponds to two codebook indexes
  • one codebook index is used to indicate a block of a horizontal dimension.
  • a parameter value corresponding to the codebook difference parameter and another codebook index is used to indicate a parameter value corresponding to the block codebook difference parameter of the vertical dimension;
  • the second PMI is used to indicate the parameter value, and the second PMI is corresponding to two codebook indexes, where one codebook index is used to indicate a parameter value corresponding to a block codebook difference parameter of a horizontal dimension, and another codebook The index is used to indicate the parameter value corresponding to the block codebook difference parameter of the vertical dimension.
  • the PMI comprises a first PMI corresponding to a CSI of a broadband, a second PMI corresponding to a CSI of a narrowband, and a third PMI, the third PMI being used to indicate the The parameter value corresponding to the block code difference parameter.
  • Embodiment 20 The method according to embodiment 19, wherein the third PMI corresponds to two codebook indexes, wherein one codebook index is used to indicate a parameter value corresponding to a block codebook difference parameter of a horizontal dimension, and another codebook The index is used to indicate the parameter value corresponding to the block codebook difference parameter of the vertical dimension.
  • the method further includes:
  • the TRP sends the codebook configuration parameter to the UE.
  • Embodiment 22 The method according to the embodiment 21, the sending, by the TRP, the codebook configuration parameter to the UE,
  • the TRP sends the high layer signaling or the physical layer signaling to the UE, where the high layer signaling or the physical layer signaling carries the codebook configuration parameter.
  • Embodiment 24 The method according to Embodiment 23, if the block code difference parameter is a phase difference, the structure of the precoding matrix in the codebook is specifically as shown in the following formula 1.1:
  • the v l, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 1 block codebook of a horizontal dimension;
  • v l denotes the codebook each block is a vector of length K 1 composition, K 1 is the number of the CSI-RS ports of the horizontal dimension of the codebook corresponding to each of the blocks, [theta] represents the horizontal dimension of the phase difference parameter, a phase difference between precoding matrices in different block codebooks representing horizontal dimensions;
  • u m, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 2 block codebook of a vertical dimension, u m represents each block of length K codebook vectors composed of 2, K 2 is the number of the vertical dimension of each codebook corresponding to the CSI-RS ports; [Phi] phase difference parameter representative of the vertical dimension,
  • ⁇ N2 represents a phase difference between precoding matrices in different block codebooks of a vertical dimension; said O 1 and said O 2 represent oversampling factors, said l, m, n being functions of a codebook index
  • the codebook index has a corresponding relationship with the PMI, and the j is a unit imaginary number, Represents Kronecker.
  • Embodiment 25 The method according to Embodiment 23, if the block code difference parameter is a modulus difference, the structure of the precoding matrix in the codebook is specifically as shown in the following formula 1.2:
  • the v l, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 1 block codebook of a horizontal dimension;
  • v l denotes the codebook each block is a vector of length K 1 composition, K 1 is the number of the CSI-RS ports of the horizontal dimension of the codebook corresponding to each of the blocks, the horizontal dimension beta] modulo value representative of a difference parameter, a modulus difference between precoding matrices in different block codebooks representing horizontal dimensions;
  • u m, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 2 block codebook of a vertical dimension;
  • u m represents each block of length K codebook vectors composed of 2
  • K 2 is the number of the vertical dimension of the codebook corresponding to each block of CSI-RS ports;
  • Embodiment 27 The method according to Embodiment 26, if the block code difference parameter is a phase difference, the structure of the precoding matrix in the codebook is as shown in Equation 1.3:
  • the v l, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 1 block codebook of a horizontal dimension
  • v l denotes the codebook each block is a vector of length K 1 composition
  • K 1 is the number of the CSI-RS ports of the horizontal dimension of the codebook corresponding to each of the blocks
  • [theta] represents the horizontal dimension of the phase difference parameter, a phase difference between precoding matrices in different block codebooks representing horizontal dimensions
  • [ ⁇ ] T represents a conjugate transpose operation
  • u m, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 2 block codebook of a vertical dimension
  • u m represents each block of length K codebook vectors composed of 2
  • K 2 is the number of the vertical dimension of each codebook corresponding to the CSI-RS ports
  • ⁇ N2 represents a phase difference between precoding matrices in different block codebooks of a vertical dimension; said O 1 and said O 2 represent oversampling factors, said l, m, n being functions of a codebook index
  • the codebook index has a corresponding relationship with the PMI, and the j is a unit imaginary number, Represents Kronecker.
  • the v l, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 1 block codebook of a horizontal dimension;
  • v l denotes the codebook each block is a vector of length K 1 composition, K 1 is the number of the CSI-RS ports of each of the block codes corresponding to this horizontal dimension, the horizontal dimension beta] modulo value representative of a difference parameter, a modulus difference between precoding matrices in different block codebooks representing horizontal dimensions;
  • u m, ⁇ represents a precoding matrix in the codebook obtained by transforming a parameter value corresponding to a block code difference parameter of a N 2 block codebook of a vertical dimension;
  • u m each represents a block of length K codebook vectors composed of 2
  • K 2 is the number of the vertical dimension of the codebook corresponding to each block of CSI-RS ports; [alpha] parameter representative of the modulus of the difference between the vertical dimension; a modulus difference
  • Embodiment 29 A user equipment, comprising: a processor, a memory, and a communication interface, the memory for storing instructions for communicating with other devices, the processor for performing storage in the memory Instruction, To enable the user device to perform the method of any of embodiments 1-14.
  • Embodiment 30 A transmitting and receiving point, comprising: a processor, a memory, and a communication interface, wherein the memory is used to store an instruction, the communication interface is used to communicate with other devices, and the processor is configured to perform the storage in the memory
  • the instructions are such that the user equipment performs the method of any of embodiments 15-28.
  • Embodiment 31 A method for indicating a precoding matrix, comprising:
  • the terminal device sends precoding matrix indication information to the radio access network device, where the precoding matrix indication information is used to indicate a precoding matrix in the codebook, where the codebook has the number of antenna port groups and between different antenna port groups.
  • the terminal device receives downlink data from the radio access network device.
  • Embodiment 32 The method of embodiment 31, wherein the precoding matrix in the codebook satisfies:
  • v l denotes the length of a vector K DFT
  • the first 1 k v l th element The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , K 1 is the number of ports CSI-RS for each antenna port group horizontal dimension; u m represents a vector of length 2 K DFT, k u m of two elements k 2 values may be ⁇ 1,2, ..., K 2 -1 ⁇ , K 2 is the number of CSI-RS ports of each packet in the vertical dimension; different ( ⁇ 1 ...
  • N-1 representative of the antenna port a phase difference or phase factor between the packets, or a phase difference or phase factor between the antenna panels, the O 1 and the O 2 representing an oversampling factor, Represents the Kronecker product; N indicates the number of antenna port groups, or the number of antenna panels, or N is 2 or 4.
  • Embodiment 33 The method as described in Embodiment 31, wherein the precoding matrix in the codebook satisfies:
  • v l, m represents the length of K 1 ⁇ K vector 2
  • v l, k m of a first element is The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , the CSI-RS K 1 is the number of ports in each packet the horizontal dimension; or
  • u m represents a DFT vector of length K 2 and the k 2 element of u m is k 2 values may be ⁇ 1,2, ..., K 2 -1 ⁇ , K 2 is the number of CSI-RS ports of each packet in the vertical dimension, the O 1 and O 2 on behalf of the oversampling factor; and
  • L m represents a function of the first PMI; Indicates the phase difference or phase factor between two polarization directions of the antenna, where n is a value ⁇ 0, 1, 2, 3 ⁇ ; e represents a natural constant, j represents a unit imaginary number, and ⁇ represents a pi ratio; ( ⁇ 1 ... ⁇ N -1
  • Embodiment 34 The method of Embodiment 31, wherein the precoding matrix in the codebook satisfies:
  • v l denotes the length of a vector K DFT
  • the first 1 k v l th element The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , K 1 is the number of ports CSI-RS for each antenna port group horizontal dimension;
  • u m represents a vector of length 2 K DFT, k u m of two elements k 2 values may be ⁇ 1,2, ..., K 2 -1 ⁇ , which is a CSI-RS K 2 the number of packets per port in a vertical dimension;
  • l is a function of the level of a first codebook index, and the second a PMI has a correspondence, the m is a function of the first vertical codebook index, and has a corresponding relationship with the first PMI;
  • the O 1 and the O 2 represent an oversampling factor, Represents the Kronecker product; where e represents a natural constant, j represents a unit imaginary number, ⁇ represents a pi,
  • ⁇ N-1 represents a phase difference or phase between antenna ports of different polarization directions of the same antenna port group a factor, or a phase difference or phase factor between antenna ports representing the same polarization direction of different antenna port groups, or a phase difference or phase factor between antenna ports representing different polarization directions in different antenna port groups; N indicates an antenna The product of the number of port groups and the number of antenna polarization directions, or N is 2 or 4 or 8.
  • Embodiment 35 The method of embodiment 31, wherein the precoding matrix in the codebook satisfies:
  • v l, m represents the length of K 1 ⁇ K vector 2
  • v l, k m of a first element is The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , K 1 is the number of ports of each CSI-RS antenna port packet horizontal dimension; or u m represents a vector of length 2 K DFT, k u m of two elements k 2 values may be ⁇ 1,2, ..., K 2 -1 ⁇ , K 2 is the CSI-RS for each antenna port number of ports in the vertical dimension of the packet; the O 1 and O 2 on behalf of the over-sampling factor, l is a function of the level of the first codebook index, having a first correspondence between the PMI, m is a function of the first vertical codebook index, having a first corresponding relationship between the PMI; the O 1 and O 2 on behalf of the oversampling Factor; ( ⁇ 1 ...
  • ⁇ N-1 represents the phase difference or phase factor between antenna ports of different polarization directions of the same antenna port group, or the phase difference between antenna ports representing the same polarization direction of different antenna port groups Or a phase factor, or a phase difference or phase factor between antenna ports representing different polarization directions in different antenna port groups; N represents the product of the number of antenna port groups and the number of antenna polarization directions, or N is 2 or 4 or 8.
  • Embodiment 36 The method of any of embodiments 31-35, comprising:
  • the terminal device receives signaling from the radio access network device, where the signaling includes the number of antenna port groups;
  • the terminal device knows that the codebook needs to be used according to the number of the antenna port groups.
  • Embodiment 37 The method for indicating a precoding matrix according to Embodiment 35, comprising:
  • the antenna port is a channel state reference signal port.
  • Embodiment 38 A communication method comprising:
  • the terminal device receives signaling from the radio access network device, where the signaling includes the number of antenna port groups;
  • the terminal device learns the codebook to be used according to the number of antenna port groups.
  • Embodiment 39 The communication method of claim 1, comprising:
  • the antenna port is a channel state reference signal port.
  • Embodiment 40 A method for indicating a precoding matrix, comprising:
  • the radio access network device receives precoding matrix indication information from the terminal, where the precoding matrix indication information is used to indicate a precoding matrix in the codebook, the codebook has the number of antenna port groups, and between different antenna port groups Information of the phase factor;
  • the radio access network device sends downlink data to the terminal device.
  • Embodiment 41 The method of Embodiment 40, wherein the precoding matrix in the codebook satisfies:
  • v l denotes the length of a vector K DFT
  • the first 1 k v l th element The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , K 1 is the number of ports CSI-RS for each antenna port group horizontal dimension; u m represents a vector of length 2 K DFT, k u m of two elements k 2 values may be ⁇ 1,2, ..., K 2 -1 ⁇ , K 2 is the number of CSI-RS ports of each packet in the vertical dimension; different ( ⁇ 1 ...
  • ⁇ N-1 representative of the antenna port
  • Embodiment 42 The method of Embodiment 40, wherein the precoding matrix in the codebook satisfies:
  • v l, m represents the length of K 1 ⁇ K vector 2
  • v l, k m of a first element is The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , the CSI-RS K 1 is the number of ports in each packet the horizontal dimension; or
  • u m represents a DFT vector of length K 2 and the k 2 element of u m is k 2 values may be ⁇ 1,2, ..., K 2 -1 ⁇ , K 2 is the number of CSI-RS ports of each packet in the vertical dimension, the O 1 and O 2 on behalf of the oversampling factor; and
  • L m represents a function of the first PMI; Indicates the phase difference or phase factor between two polarization directions of the antenna, where n is a value ⁇ 0, 1, 2, 3 ⁇ ; e represents a natural constant, j represents a unit imaginary number, and ⁇ represents a pi ratio; ( ⁇ 1 ... ⁇ N -1
  • Embodiment 43 The method of Embodiment 40, wherein the precoding matrix in the codebook satisfies:
  • v l denotes the length of a vector K DFT
  • the first 1 k v l th element The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , K 1 is the number of ports CSI-RS for each antenna port group horizontal dimension;
  • u m represents a vector of length 2 K DFT, k u m of two elements k 2 values may be ⁇ 1,2, ..., K 2 -1 ⁇ , which is a CSI-RS K 2 the number of packets per port in a vertical dimension;
  • l is a function of the level of a first codebook index, and the second a PMI has a correspondence, the m is a function of the first vertical codebook index, and has a corresponding relationship with the first PMI;
  • the O 1 and the O 2 represent an oversampling factor, Represents the Kronecker product; where e represents a natural constant, j represents a unit imaginary number, ⁇ represents a pi,
  • ⁇ N-1 represents a phase difference or phase between antenna ports of different polarization directions of the same antenna port group a factor, or a phase difference or phase factor between antenna ports representing the same polarization direction of different antenna port groups, or a phase difference or phase factor between antenna ports representing different polarization directions in different antenna port groups; N indicates an antenna The product of the number of port groups and the number of antenna polarization directions, or N is 2 or 4 or 8.
  • Embodiment 44 The method of embodiment 40, wherein the precoding matrix in the codebook satisfies:
  • v l, m represents the length of K 1 ⁇ K vector 2
  • v l, k m of a first element is The value of k 1 may be ⁇ 1,2, ..., K 1 -1 ⁇ , K 1 is the number of ports of each CSI-RS antenna port packet horizontal dimension; or u m represents a vector of length 2 K DFT, k u m of two elements k 2 values may be ⁇ 1,2, ..., K 2 -1 ⁇ , K 2 is the CSI-RS for each antenna port number of ports in the vertical dimension of the packet; the O 1 and O 2 on behalf of the over-sampling factor, l is a function of the level of the first codebook index, having a first correspondence between the PMI, m is a function of the first vertical codebook index, having a first corresponding relationship between the PMI; the O 1 and O 2 on behalf of the oversampling Factor; ( ⁇ 1 ...
  • ⁇ N-1 represents the phase difference or phase factor between antenna ports of different polarization directions of the same antenna port group, or the phase difference between antenna ports representing the same polarization direction of different antenna port groups Or a phase factor, or a phase difference or phase factor between antenna ports representing different polarization directions in different antenna port groups; N represents the product of the number of antenna port groups and the number of antenna polarization directions, or N is 2 or 4 or 8.
  • Embodiment 45 The method of any of embodiments 40-44, comprising:
  • the radio access network device sends signaling to the terminal device, where the signaling includes the number of antenna port groups;
  • the terminal device knows the codebook to be used according to the number of antenna port groups.
  • Embodiment 46 The method for indicating a precoding matrix as described in Embodiment 45, comprising:
  • the antenna port is a channel state reference signal port.
  • Embodiment 47 A communication method comprising:
  • the radio access network device sends signaling to the terminal device, where the signaling includes the number of antenna port groups;
  • the terminal device knows the codebook to be used according to the number of antenna port groups.
  • the terminal device receives signaling from the radio access network device, where the signaling includes the number of antenna port groups.
  • Embodiment 48 The method for indicating a precoding matrix as described in Embodiment 47, comprising:
  • the antenna port is a channel state reference signal port.
  • Embodiment 49 A terminal device comprising: a processor, a memory, and a transceiver, the memory for storing instructions for the terminal device to communicate with other devices, the processor for executing instructions stored in the memory, The operation of the method of any of embodiments 31-39 is performed by the terminal device.
  • Embodiment 50 A radio access network device, comprising: a processor, a memory, and a transceiver, the memory for storing instructions for the radio access network device to communicate with other devices, the processor for executing the An instruction stored in the memory to cause the radio access network device to perform the operations of the method of any of claims 40-48.
  • Embodiment 51 A system chip comprising: at least one processor for executing stored instructions to cause the terminal device to perform the operations of the method of any of embodiments 31-39.
  • Embodiment 52 A system chip, comprising: at least one processor, the at least one processor configured to execute stored instructions to cause the radio access network device to perform any of embodiments 40-48 The operation of the method described.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

L'invention concerne, dans certains modes de réalisation, un procédé et un dispositif de rétroaction d'informations d'état de canal à base de livre de codes, comprenant les étapes suivantes : un équipement utilisateur (UE) envoie un indice de matrice de précodage (PMI) à un point de transmission-réception (TRP), le PMI étant utilisé de manière à indiquer une matrice de précodage cible et une valeur de paramètre correspondant à un paramètre de différence de livre de codes de bloc. La matrice de précodage cible est une matrice de précodage dans un livre de codes, et le livre de codes est un livre de codes pré-généré par l'UE selon un paramètre de configuration de livre de codes. Au moins une partie de la matrice de précodage dans le livre de codes est obtenue par transformation à partir d'une matrice de précodage et d'une valeur de paramètre dans un livre de codes de bloc. Le nombre de livres de codes de bloc est d'au moins deux, et le nombre de valeurs de paramètre correspond au nombre de livres de codes de bloc. Le paramètre de configuration de livre de codes comprend le nombre de livres de codes de bloc dans le livre de codes et les longueurs de vecteurs correspondant aux matrices de précodage dans les livres de codes de bloc, et les livres de codes de blocs sont constitués d'une matrice de précodage prédéfinie. Les modes de réalisation de la présente invention peuvent améliorer la précision du faisceau et les performances du système.
PCT/CN2017/104656 2016-09-29 2017-09-29 Procédé et dispositif de rétroaction d'informations d'état de canal à base de livre de codes WO2018059567A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
CA3038852A CA3038852C (fr) 2016-09-29 2017-09-29 Procede et dispositif de retroaction d'informations d'etat de canal a base de livre de codes
BR112019005984A BR112019005984A2 (pt) 2016-09-29 2017-09-29 método de feedback de informações de estado de canal baseado em livro de códigos e dispositivo
EP17855017.4A EP3518434B1 (fr) 2016-09-29 2017-09-29 Procédé et dispositif de rétroaction d'informations d'état de canal à base de livre de codes
JP2019516626A JP6977232B2 (ja) 2016-09-29 2017-09-29 コードブックベースのチャネル状態情報のフィードバック方法及びデバイス
KR1020197012248A KR102455312B1 (ko) 2016-09-29 2017-09-29 코드북 기반 채널 상태 정보 피드백 방법 및 디바이스
CN201780060650.7A CN110100393B (zh) 2016-09-29 2017-09-29 基于码本的信道状态信息反馈方法及设备
AU2017336900A AU2017336900B2 (en) 2016-09-29 2017-09-29 Codebook-based channel state information feedback method and device
RU2019112808A RU2756905C2 (ru) 2016-09-29 2017-09-29 Способ и устройство для передачи информации о состоянии канала по обратной связи на основании кодовой книги
US16/369,043 US10819406B2 (en) 2016-09-29 2019-03-29 Codebook-based channel state information feedback method and device

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CN201710067261 2017-02-06
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CN201710336128.9 2017-05-12
CN201710336128.9A CN107888246B (zh) 2016-09-29 2017-05-12 基于码本的信道状态信息反馈方法及设备

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020507950A (ja) * 2017-01-06 2020-03-12 テレフオンアクチーボラゲット エルエム エリクソン（パブル） マルチパネルアンテナアレイからの送信のプリコーディング
CN112368948A (zh) * 2018-07-06 2021-02-12 日本电气株式会社 多trp码本

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102195755A (zh) * 2010-03-10 2011-09-21 松下电器产业株式会社 反馈双极化天线的预编码矩阵索引的方法和设备
CN103746776A (zh) * 2014-01-24 2014-04-23 宇龙计算机通信科技(深圳)有限公司 数据传输方法、数据传输装置和基站
WO2014134876A1 (fr) * 2013-03-08 2014-09-12 华为技术有限公司 Procédé de rétroaction d'indication de matrice de précodage, et extrémité de réception et extrémité d'émission
CN104243106A (zh) * 2014-09-28 2014-12-24 重庆邮电大学 一种基于3d交叉极化信道大规模mimo系统的码本构造方法
CN104488210A (zh) * 2013-04-28 2015-04-01 华为技术有限公司 预编码矩阵指示的反馈方法、接收端和发射端

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102195755A (zh) * 2010-03-10 2011-09-21 松下电器产业株式会社 反馈双极化天线的预编码矩阵索引的方法和设备
WO2014134876A1 (fr) * 2013-03-08 2014-09-12 华为技术有限公司 Procédé de rétroaction d'indication de matrice de précodage, et extrémité de réception et extrémité d'émission
CN104488210A (zh) * 2013-04-28 2015-04-01 华为技术有限公司 预编码矩阵指示的反馈方法、接收端和发射端
CN103746776A (zh) * 2014-01-24 2014-04-23 宇龙计算机通信科技(深圳)有限公司 数据传输方法、数据传输装置和基站
CN104243106A (zh) * 2014-09-28 2014-12-24 重庆邮电大学 一种基于3d交叉极化信道大规模mimo系统的码本构造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3518434A4 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020507950A (ja) * 2017-01-06 2020-03-12 テレフオンアクチーボラゲット エルエム エリクソン（パブル） マルチパネルアンテナアレイからの送信のプリコーディング
US11038566B2 (en) 2017-01-06 2021-06-15 Telefonaktiebolaget Lm Ericsson (Publ) Precoding a transmission from a multi-panel antenna array
JP7017573B2 (ja) 2017-01-06 2022-02-08 テレフオンアクチーボラゲット エルエム エリクソン（パブル） マルチパネルアンテナアレイからの送信のプリコーディング
US11424795B2 (en) 2017-01-06 2022-08-23 Telefonaktiebolaget Lm Ericsson (Publ) Precoding a transmission from a multi-panel antenna array
US11894895B2 (en) 2017-01-06 2024-02-06 Telefonaktiebolaget Lm Ericsson (Publ) Precoding a transmission from a multi-panel antenna array
CN112368948A (zh) * 2018-07-06 2021-02-12 日本电气株式会社 多trp码本
CN112368948B (zh) * 2018-07-06 2023-06-23 日本电气株式会社 用于通信的方法、终端设备和计算机可读介质

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