WO2015103752A1 - 预编码矩阵集合确定方法、参数指示信息发送方法及装置 - Google Patents
预编码矩阵集合确定方法、参数指示信息发送方法及装置 Download PDFInfo
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- WO2015103752A1 WO2015103752A1 PCT/CN2014/070353 CN2014070353W WO2015103752A1 WO 2015103752 A1 WO2015103752 A1 WO 2015103752A1 CN 2014070353 W CN2014070353 W CN 2014070353W WO 2015103752 A1 WO2015103752 A1 WO 2015103752A1
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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
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B7/0478—Special codebook structures directed to feedback optimisation
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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
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
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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
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0658—Feedback reduction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0026—Division using four or more dimensions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
Definitions
- the present invention relates to the field of wireless communication technologies, and in particular, to a method for determining a precoding matrix set, a method and a device for transmitting parameter indication information.
- Background technique
- MIMO wireless communication systems can achieve diversity and array gain through transmit precoding techniques and receive combining techniques.
- Systems that utilize precoding can be expressed as:
- Y is the received signal vector
- H is the channel matrix
- precoding matrix is the transmitted symbol vector
- n is the measurement noise
- the CSI information reported by the existing Long Term Evolution (LTE) system includes a Rank Indicator (RI), a Precoding Matrix Indicator (PMI), and a Channel Quality Indicator (CQI) information.
- RI and PMI indicate the number of transport layers and precoding matrices used, respectively.
- the set of precoding matrices used is generally referred to as a codebook, where each precoding matrix is a codeword in a codebook.
- the codebook of LTE R8 is mainly designed for single-user MIMO (SU-MIMO), in which the precoding matrix or codeword satisfies the 8PSK constraint and is quantized in a fixed range.
- SU-MIMO single-user MIMO
- the accuracy of spatial quantization is limited, and its performance will be severely limited for 3D MIMO (3D MIMO, 3 Dimensions MIMO) technology.
- the technical idea is mainly: According to the 3D channel information estimated by the user end, the 3-dimensional beam shaping weight of the active antenna end is adjusted, so that the main lobe of the beam "aligns" the target user in the 3-dimensional space, thereby greatly improving the receiving signal. Power, improve the signal to interference and noise ratio, and thus improve the throughput of the entire system.
- the precoding matrix set used is the same for all the transmitting ends and all communication scenarios. Therefore, when the precoding matrix is instructed, the precoding matrix to be fed back can only be selected from the same precoding matrix set, and in actual applications, the communication scenarios in which different transmitting ends are located may be different. Moreover, the communication scenario in which one sender is located is also changed. At this time, the feedback of the precoding matrix indication is used by using a fixed precoding matrix set, and there is a problem of poor flexibility, which leads to poor communication quality.
- the embodiment of the present invention provides a precoding matrix set determination, a parameter indication information sending method, and a device, which are used to solve the flexibility in the prior art that only the fixed precoding matrix set feedback precoding matrix indication can be based on Poor question.
- a method for determining a precoding matrix set including:
- a parameter for determining a set of precoding matrix the parameter comprising a phase parameter, an amplitude parameter, a quantity of a vector in a precoding matrix set, and a first codebook set in the dual codebook feedback
- the number of merged vectors, at least one of the number of vectors in the second codebook set in the dual codebook feedback, the parameters are not fixed;
- a set of precoding matrices is determined using the parameters, the set of precoding matrices comprising at least one precoding matrix.
- the parameters are terminal specific.
- the parameter is specific to a carrier.
- the parameter is specific to the precoding matrix subset in the dual codebook feedback mode
- the precoding matrix set determined by using the parameter is the first codebook in the dual codebook feedback mode
- a subset of precoding matrices determined for each set of parameters is formed into a set of precoding matrices.
- the first network device determines a parameter used to determine a precoding matrix set, including:
- the first parameter indication information is sent by using a broadcast signaling, a radio resource control RRC signaling, or a dynamic signaling.
- the method further includes:
- the first network device determines a parameter used to determine a precoding matrix set, including:
- the first network device carries, according to the user ID, the cell ID of the cell, the CSI process ID, the carrier ID, the DMRS configuration parameter, the CSI-RS configuration parameter, the system bandwidth allocated for the first network device, the PRG, or the subband size. And indicating information, determining a preset parameter corresponding to the indication information, as a parameter for determining a precoding matrix set.
- the method further includes:
- the first network device is a terminal
- the second network device is a base station
- the first network device and the second network device are both base stations; or
- the first network device and the second network device are both terminals.
- the parameter includes a first phase value, a precoding matrix
- 0 is the minimum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set
- the first phase value ⁇ is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set.
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- v n is the nth vector in the set of precoding matrices
- the amplitude a m , n is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- the parameter includes a first phase value precoding matrix set The amplitude of the element (m, n) a m , n , the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and the first phase value ⁇ ⁇ , pre The amplitude a m , n
- B is a set of precoding matrices
- v n is the nth vector in the set of precoding matrices
- the amplitude a m , n is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- the parameter includes a second phase value and a third phase value , the amplitude a m , n of the elements (m, n) in the precoding matrix set, the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and Second phase Bit value third phase value
- the second phase value is a minimum value of a phase difference of two adjacent antennas in a vector of a precoding matrix set
- the third phase value is a maximum value of phase differences of two adjacent antennas in a vector of a precoding matrix set.
- Determining a set of precoding matrices using the parameters including: Determining the composition of the precoding matrix using the phase interval, the amplitude a mn , the number N, and the number M
- the parameter includes a second phase value ⁇ 2 , a third phase value phase interval ⁇ , an amplitude a mn of elements (m, n) in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and a second Phase value ⁇ 2 , third phase value phase interval ⁇ , amplitude a
- phase difference between two adjacent antennas in the nth vector in the precoding matrix set is %+ ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is ⁇ ,
- a vector of a set of matrices wherein, is a minimum value of phase differences of two adjacent antennas in a vector of precoding matrix sets; a maximum value of phase differences of two adjacent antennas in a vector of precoding matrix sets; precoding matrix
- the form of the vector constituting the precoding matrix set is as follows: Where ⁇ is a set of precoding matrices, ⁇ ⁇ is the nth vector in the precoding matrix set, and the amplitude a mn is a real number.
- the parameter includes K second phase values, K third phase values, the magnitude of the elements (m, n) in the precoding matrix subset a m , n , the number of K precoding matrix subset vectors, the number of elements in each vector in the precoding matrix subset M
- k 2 represents a second phase of the k-th value
- phase value k is a minimum value of phase differences of two adjacent antennas in a vector of the precoding matrix subset; and the phase value is two adjacent antennas in a vector of the precoding matrix set The maximum value of the phase difference;
- a precoding matrix subset is determined for each set of second phase values and third phase values, respectively, to form a precoding matrix set.
- the forms of the vectors constituting the precoding matrix set and the kth precoding matrix subset are as follows:
- B is the precoding matrix set
- B k is the kth precoding matrix subset
- v n k is the nth vector in the kth precoding matrix subset
- a mn is the element (m , the magnitude of n), and is a real number
- the phase difference of two adjacent antennas in the nth vector of the kth precoding matrix subset is %, k + n A k ;
- two of the kth precoding matrix subset The phase difference between the two mth antennas in the adjacent vector is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k .
- At least two of the numbers N k of the K precoding matrix subset vectors are different.
- the parameter includes K second phases a value, K third phase values, K phase intervals, an amplitude a mn of elements (m, n) in the precoding matrix subset, at least one of the number M of elements in each vector in the precoding matrix subset, 2k represents the kth second phase value, represents the kth third phase value, A k
- the method comprises:
- phase value k is two adjacent vectors in the vector of the precoding matrix subset
- the minimum value of the phase difference of the antenna is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set
- the phase of two adjacent antennas in the nth vector of the kth precoding matrix subset The difference is %, k + nA k
- the phase difference of two mth antennas in two adjacent vectors in the k-th precoding matrix subset is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k
- N k is the number of vectors in the k-th precoding matrix subset, j_ A ⁇ k - ⁇ k
- B is the precoding matrix set
- B k is the kth precoding matrix subset
- v n k is the nth vector in the kth precoding matrix subset
- a mn Is the magnitude of the element (m, n) and is a real number.
- At least two of the K second phase values 2 k are different.
- At least two of the K phase intervals A k are different.
- the parameter includes a fourth phase value ⁇ 4 , The phase interval ⁇ , the amplitude a m , n of the elements (m, n) in the precoding matrix set, the number N of vectors in the precoding matrix set, and at least one of the number M of elements in each vector in the precoding matrix set Kind, And the fourth phase value phase
- the fourth phase value % is a minimum value of phase differences of two adjacent antennas in a vector of a precoding matrix set
- the phase difference between two adjacent antennas in the nth vector in the precoding matrix set is %+ ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is mA, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- v n is in the set of precoding matrices
- the nth vector, the amplitude a mn is a real number.
- the parameter includes K fourth phase values, K phase intervals, the amplitude of the elements (m, n) in the precoding matrix subset a m , n , the number of K precoding matrix subset vectors, the number of elements in each vector in the precoding matrix subset M at least Species, k denotes the k-th fourth phase
- determining a corresponding k-th precoding matrix subset for k and A k including:
- phase value k is two of the vectors of the precoding matrix subset
- the minimum value of the phase difference of adjacent antennas; the phase difference of two adjacent antennas in the nth vector of the kth precoding matrix subset is 4 , k + n A k ; two of the kth precoding matrix subsets
- the phase difference between two mth antennas in the adjacent vector is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k ;
- a subset of precoding matrices determined for each phase interval is formed into a set of precoding matrices.
- At least two of the K fourth phase values 4k are different.
- At least two of the numbers N k of the K precoding matrix subset vectors are different.
- determining a corresponding subset of the kth precoding matrix for A k includes:
- At least two of the numbers N k of the K precoding matrix subset vectors are different.
- At least two of the K phase intervals A k are different.
- the second aspect provides a method for sending parameter indication information, including:
- the second network device determines parameters for determining a set of precoding matrices, the parameters including phase parameters, amplitude parameters, the number of vectors in the precoding matrix set, and the number of vectors in the first codebook set in the dual codebook feedback, At least one of the number of vectors in the second codebook set in the codebook feedback, the parameter is not fixed;
- the parameters are cell specific.
- the parameters are terminal specific.
- the parameters are specific to the CSI process.
- the parameter is specific to a carrier. In conjunction with the second aspect, in a fifth possible implementation, the parameter is specific to rank rank.
- the precoding matrix set determined by using the parameter is the first codebook in the dual codebook feedback mode
- the first parameter indication information is sent to the first network device, specifically:
- the second parameter indication information sent by the first network device is received, where the second parameter indication information is used to indicate a reference parameter used to determine a precoding matrix set.
- the reference parameter includes a reference phase parameter, a reference amplitude parameter, a reference number of vectors in the precoding matrix set, a reference number of vectors in the first codebook set in the dual codebook feedback, and a second codebook set in the dual codebook feedback At least one of the reference quantities of the medium vectors.
- the matrix indication information of the precoding matrix selected from the determined precoding matrix set fed back by the first network device is received.
- the first network device is a terminal, and the second network device is a base station; or
- the first network device and the second network device are both base stations; or
- the first possible implementation of the second aspect, the second possible implementation of the second aspect, the third possible implementation of the second aspect, and the fourth possible aspect of the second aspect Implementation manner, the fifth possible implementation manner of the second aspect, the sixth possible implementation manner of the second aspect, the seventh possible implementation manner of the second aspect, and the eighth possible implementation manner of the second aspect
- the first phase value is a maximum value of phase differences of two adjacent antennas in a vector of a precoding matrix set.
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- the parameter includes a first phase value, and an amplitude of the element (m, n) in the precoding matrix set a mn , the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and the first phase value, the magnitude of the element (m, n) in the precoding matrix set a mn , the number N of vectors in the precoding matrix set, and the number M of elements in each vector in the precoding matrix set is preset except for the parameters;
- ⁇ is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set.
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- v n is the nth vector in the set of precoding matrices
- the amplitude a m , n is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- the second phase value is a minimum value of a phase difference of two adjacent antennas in a vector of a precoding matrix set
- the third phase value is a maximum value of phase differences of two adjacent antennas in a vector of precoding matrix sets.
- the form of the vector constituting the precoding matrix set is as follows:
- the parameter includes a second phase value, a third phase value, and an element in the precoding matrix set (m, n
- the amplitude a mn the number N of vectors in the precoding matrix set, the number M of elements in each vector in the precoding matrix set, at least one of the integer L, and the second phase value third phase value, precoding
- the magnitude of the elements (m, n) in the matrix set a mn the number N of vectors in the precoding matrix set, the number M of elements in each vector in the precoding matrix set, except for the parameters in the integer L default;
- Determining a precoding matrix set using the parameters includes: determining a precoding matrix by using a phase interval, an amplitude a mn , a quantity N, and a quantity M
- the minimum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set.
- the parameter includes a second phase value, a third phase value, a phase interval ⁇ , and an element in the precoding matrix set ( m, n) amplitude a mn , at least one of the number M of elements in each vector in the precoding matrix set, and second phase value third phase value, phase interval ⁇ , elements in the precoding matrix set ( m, n) amplitude a mn , the number M of elements in each vector in the precoding matrix set is preset except for the parameters;
- the second phase value is a minimum value of a phase difference of two adjacent antennas in a vector of a precoding matrix set
- the third phase value is a maximum value of phase differences of two adjacent antennas in a vector of the precoding matrix set
- phase difference between two adjacent antennas in the nth vector in the precoding matrix set is % + ⁇ ⁇ ; the phase difference between two m antennas in two adjacent vectors in the precoding matrix set is ⁇ ⁇ ,
- the parameter includes a second phase value, a third phase value, a phase interval ⁇ , and an element in the precoding matrix set ( m, n) amplitude a mn , the number M of elements in each vector in the precoding matrix set, at least one of integer L, and the second phase value third phase value phase interval ⁇ , in the precoding matrix set
- the magnitude of the element (m, n) a mn the number of elements in each vector in the precoding matrix set
- the integer L is preset except for the parameters
- Determining a set of precoding matrices using the parameters includes: determining a precoding using a phase interval, a phase interval of eight, an amplitude a mn, and a number ⁇
- the form of the vector constituting the precoding matrix set is as follows: : a mn e
- ⁇ is the set of precoding matrices
- ⁇ ⁇ is the nth vector in the set of precoding matrices
- the amplitude a mn is a real number
- the parameter includes K second phase values, K third phase values, and a subset of the precoding matrix
- the magnitude of the element (m, n) a mn , the number of vectors in the K precoding matrix subsets, at least one of the number M of elements in each vector in the precoding matrix subset, 2 k represents the kth second phase
- the value represents the kth third phase value
- N k represents the number of vectors in the kth precoding matrix subset, l ⁇ k ⁇ K
- the magnitude of the element (m, n) in the subset is a mn ,
- M is preset
- a precoding matrix subset is determined for each set of second phase values and third phase values, respectively, to form a precoding matrix set.
- At least two of the numbers N k of the K precoding matrix subset vectors are different.
- the parameter includes K second phase values, K third phase values, K phase intervals, and The amplitude a m , n of the elements (m, n) in the subset of the coding matrix, at least one of the number M of elements in each vector in the precoding matrix subset, k represents the kth second phase value, representing the kth Third phase values, A k represents the kth phase interval, l ⁇ k ⁇ K, and K second phase values, K third phase values, K phase intervals, elements in the precoding matrix subset (m , n) the amplitude a m , n , the number M of elements in each vector in the precoding matrix subset is preset except for the parameter;
- the method comprises:
- phase value k is a minimum value of phase differences of two adjacent antennas in a vector of the precoding matrix subset; and the phase value is two adjacent antennas in a vector of the precoding matrix set
- the maximum value of the phase difference; the phase difference between two adjacent antennas in the nth vector of the kth precoding matrix subset is %, k + nA k ; in the adjacent vector of the kth precoding matrix subset
- the phase difference between the two mth antennas is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k , N k is the number of vectors in the kth precoding matrix subset, J_ A ⁇ k - ⁇ k
- B is the precoding matrix set
- B k is the kth precoding matrix subset
- v n k is the kth precoding
- the nth vector in the matrix subset, a mn is the magnitude of the element (m, n), and is a real number.
- the parameter includes a fourth phase value %, a phase interval ⁇ , and an element in the precoding matrix set (m, n) the amplitude a mn , the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and the fourth phase value phase interval ⁇ , precoding matrix set
- the magnitude of the element (m, n) a mn , the number N of vectors in the precoding matrix set, and the number M of elements in each vector in the precoding matrix set is preset except for the parameter;
- the fourth phase value % is a minimum value of phase differences of two adjacent antennas in a vector of a precoding matrix set
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number
- the parameter includes K fourth phase values, K phase intervals, and elements in the precoding matrix subset ( m, n) amplitude a m , n , the number of K precoding matrix subset vectors, at least one of the number M of elements in each vector in the precoding matrix subset, 4k represents the kth fourth phase value , A k represents the kth phase interval, N k represents the number of vectors in the kth precoding matrix subset, l ⁇ k ⁇ K, and K fourth phase values, K phase intervals, in the precoding matrix subset
- the magnitude of the element (m, n) a mn , the number of vectors in the K precoding matrix subsets, the number M of elements in each vector in the precoding matrix subset is preset except for the parameters; Determining a set of precoding matrices using the parameters, including:
- determining a corresponding k-th precoding matrix subset for k and A k including:
- phase value k is two of the vectors of the precoding matrix subset
- the minimum value of the phase difference of adjacent antennas; the phase difference of two adjacent antennas in the nth vector of the kth precoding matrix subset is 4 , k + n A k ; two of the kth precoding matrix subsets
- the phase difference between two mth antennas in the adjacent vector is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k ;
- a subset of precoding matrices determined for each phase interval is formed into a set of precoding matrices.
- B is the set of precoding matrices
- B k is the subset of the kth precoding matrix
- v n k is the nth vector of the kth precoding matrix subset
- a mn is the magnitude of the element (m, n) , and is a real number.
- At least two of the K fourth phase values 4k are different.
- At least two of the numbers N k of the K precoding matrix subset vectors are different.
- At least two of the K phase intervals A k are different.
- the parameter includes a fourth phase value %, K phase intervals, and an element in the precoding matrix subset
- the magnitude of (m,n) a mn the number of vectors in the K precoding matrix subsets, at least one of the number M of elements in each vector in the precoding matrix subset,
- a k represents K different phase intervals
- the kth phase interval, N k represents the number of vectors in the kth precoding matrix subset, l ⁇ k ⁇ K
- the fourth phase value %, K phase intervals, elements in the precoding matrix subset (m, n) the amplitude a mn the number of K precoding matrix subset vectors, the number M of elements in each vector in the precoding matrix subset is preset except for the parameters;
- phase difference between two adjacent antennas in the nth vector in the precoding matrix subset is + nA k ;
- the phase difference of two mth antennas in two adjacent vectors in the kth precoding matrix subset is mA k , 0 ⁇ m ⁇ M,0 ⁇ n ⁇ N k ;
- a subset of precoding matrices determined for each phase interval is formed into a set of precoding matrices.
- B is a precoding matrix set
- B k is the kth precoding matrix subset
- v n k is The nth vector in the subset of the kth precoding matrix
- a mn is the magnitude of the element (m, n), and is a real number.
- at least two of the numbers N k of the K precoding matrix subset vectors are different.
- At least two of the K phase intervals A k are different.
- a precoding matrix set determining apparatus which is integrated in the first network device, and includes:
- a parameter determining unit configured to determine a parameter used to determine a precoding matrix set, where the parameter includes a phase parameter, an amplitude parameter, a quantity of vectors in a precoding matrix set, and a quantity of vectors in the first codebook set in the dual codebook feedback At least one of the number of vectors in the second codebook set in the dual codebook feedback, the parameter is not fixed;
- a set determining unit configured to determine a precoding matrix set using the parameter, the precoding matrix set including at least one precoding matrix.
- the parameter is cell specific.
- the parameters are terminal specific.
- the parameters are specific to rank rank.
- the parameter is specific to the precoding matrix subset in the dual codebook feedback mode
- the precoding matrix set determined using the parameters is a precoding matrix subset of the first codebook W1 or the second codebook W2 in the dual codebook feedback mode.
- the parameter includes multiple sets of parameters for determining different subsets of precoding matrices;
- the set determining unit is specifically configured to determine a respective precoding matrix subset by using each set of parameters, and form a precoding matrix set by using a precoding matrix subset determined separately for each set of parameters.
- the method further includes:
- a receiving unit configured to receive first parameter indication information that is sent by the second network device, where the first parameter indication information is used to indicate a parameter used to determine a precoding matrix set;
- the first parameter indication information is sent by using a broadcast signaling, a radio resource control RRC signaling, or a dynamic signaling.
- the method further includes:
- a sending unit configured to feed back, by the second network device, second parameter indication information, where the second parameter indication information is used to indicate a reference parameter used to determine a precoding matrix set, where the reference parameter includes a reference phase parameter, and the reference amplitude parameter And a reference number of vectors in the precoding matrix set, a reference number of vectors in the first codebook set in the dual codebook feedback, and at least one of reference numbers of vectors in the second codebook set in the dual codebook feedback.
- the parameter determining unit is specifically configured to use, according to the user ID, the cell ID of the cell, the CSI process ID, the carrier ID, the DMRS configuration parameter, and the CSI-RS configuration parameter. Determining, by the system bandwidth, the PRG, or the indication information carried in the subband size, the preset parameter corresponding to the indication information, as a parameter for determining a precoding matrix set.
- the method further includes:
- a selecting unit configured to select, from the determined precoding matrix set, a precoding matrix that needs to be reported to the second network device
- a sending unit configured to feed back, to the second network device, matrix indication information of the selected precoding matrix.
- the first network device is a terminal, and the second network device is a base station; or
- the first network device and the second network device are both base stations; or
- the first network device and the second network device are both terminals.
- the parameter includes a first phase value, a precoding matrix
- the first phase value is a maximum value of phase differences of two adjacent antennas in a vector of a precoding matrix set.
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- the parameter includes a first phase value precoding matrix set The amplitude of the element (m, n) a m , n , the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and the first phase value ⁇ ⁇ , The amplitude of the elements (m, n)
- the parameter includes a second phase value and a third phase value , the amplitude a m , n of the elements (m, n) in the precoding matrix set, the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and second Phase value third phase value
- the amplitude of the element (m, n) in the precoding matrix set, the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and second Phase value third phase value
- the amplitude of the element (m, n) in the precoding matrix set, the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and second Phase value third phase value
- the amplitude of the element (m, n) in the precoding matrix set, the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the
- the second phase value is a minimum value of phase differences between two adjacent antennas in a vector of the precoding matrix set
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N , the nth vector in the precoding matrix set
- the phase difference between two adjacent antennas is % + ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is A
- the parameter includes a second phase value ⁇ 2 , a third phase value phase interval ⁇ , and an amplitude of an element (m, n) in the precoding matrix set a mn , at least one of the number M of elements in each vector in the precoding matrix set, and the second phase value ⁇ 2 , the third phase value phase interval ⁇ , the element (m, n),
- the second phase value is a minimum value of a phase difference of two adjacent antennas in a vector of a precoding matrix set
- the third phase value is a maximum value of phase differences of two adjacent antennas in a vector of the precoding matrix set
- phase difference between two adjacent antennas in the nth vector in the precoding matrix set is %+ ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is ⁇ ,
- the form of the vector constituting the precoding matrix set is as follows:
- the parameter includes a second phase value ⁇ 2 , a third phase value phase interval ⁇ , and an amplitude a of the element (m, n) in the precoding matrix set a Mn, matrix pre-set number m of coding each vector element, L is an integer of at least one of the second and third phase value of phase value [Delta
- the set determining unit is specifically configured to use a phase interval, a phase interval ⁇ , and an amplitude a
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- ⁇ ⁇ is the nth vector in the set of precoding matrices
- the amplitude a mn is a real number
- the parameter includes K second phase values, K third phase values, the amplitude a mn of the elements (m, n) in the precoding matrix subset, the number of K precoding matrix subset vectors, and the number M of elements in each vector in the precoding matrix subset at least Species, k 2 represents a second phase of the k-th
- the set determining unit is specifically configured to determine a precoding matrix subset for each set of the second phase value and the third phase value respectively;
- the method comprises:
- phase value k is two adjacent vectors in the vector of the precoding matrix subset
- the phase value 3 , k is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set
- a precoding matrix subset is determined for each set of second phase values and third phase values, respectively, to form a precoding matrix set.
- B is the precoding matrix set
- B k is the kth precoding matrix subset
- v n k is the nth vector in the kth precoding matrix subset
- a mn is the element (m , the magnitude of n), and is a real number
- the phase difference of two adjacent antennas in the nth vector of the kth precoding matrix subset is %, k + n A k ;
- the phase difference between the two mth antennas in the adjacent vector is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k .
- the parameter includes K second phase values, K third phase values, K phase intervals, the amplitude a mn of the elements (m, n) in the precoding matrix subset, At least one of the number M of elements in each vector in the precoding matrix subset, 2k represents the kth second phase value, represents the kth third phase value, A k represents the
- the set determining unit is specifically configured to determine a precoding matrix subset for each set of the second phase value and the third phase value respectively;
- the method comprises:
- phase value k is two of the vectors of the precoding matrix subset
- the minimum value of the phase difference of the adjacent antennas is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set
- two adjacent antennas in the nth vector of the kth precoding matrix subset The phase difference is %, k + nA k
- the phase difference of two mth antennas in two adjacent vectors in the k-th precoding matrix subset is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k
- N k is the number of vectors in the k-th precoding matrix subset
- JA k ⁇ k " ⁇ k ;
- N k - 1 will form a precoding matrix set for each set of precoding matrix subsets determined for each of the second phase value and the third phase value.
- At least two of the K phase intervals A K are different.
- the parameter includes a fourth phase value ⁇ 4 , The phase interval ⁇ , the amplitude a m , n of the elements (m, n) in the precoding matrix set, the number N of vectors in the precoding matrix set, and at least one of the number M of elements in each vector in the precoding matrix set Kind, A fourth phase value of
- the set determining unit is specifically configured to determine, by using the fourth phase value, the phase interval VIII, the amplitude a m , n , the quantity N, and the quantity M, a vector constituting the precoding matrix set;
- the fourth phase value % is a minimum value of phase differences of two adjacent antennas in a vector of a precoding matrix set
- the phase difference between two adjacent antennas in the nth vector in the precoding matrix set is %+ ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is ⁇ , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number
- the parameter includes K fourth phase values, K phase intervals, the amplitude of the elements (m, n) in the precoding matrix subset a m , n , the number of K precoding matrix subset vectors, the number of elements in each vector in the precoding matrix subset M at least Species, k denotes the k-th fourth
- phase value k is two of the vectors of the precoding matrix subset
- the minimum value of the phase difference of adjacent antennas; the phase difference of two adjacent antennas in the nth vector of the kth precoding matrix subset is ⁇ p 4 , k + nA k ; two of the kth precoding matrix subsets
- the phase difference between two mth antennas in two adjacent vectors is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k ;
- At least two of the K fourth phase values 4 k are different.
- At least two of the numbers N k of the K precoding matrix subset vectors are different.
- At least two of the K phase intervals A k are different.
- the parameter includes a fourth phase value ⁇ 4 , a phase interval, and an amplitude a mn of the element (m, n) in the precoding matrix subset.
- the number of vectors in the K precoding matrix subsets, at least one of the number M of elements in each vector in the precoding matrix subset, A k represents the kth phase interval in K different phase intervals, N k represents The number of vectors in the kth precoding matrix subset, l ⁇ k ⁇ K, and the fourth phase value, K phase intervals, the amplitude of the elements (m, n) in the precoding matrix subset a mn , K precoding
- the number of vectors in the matrix subset, the number M of elements in each vector in the precoding matrix subset is preset except for the parameters; the set determining unit is specifically configured to determine the pre-preparation for each phase interval
- the coding matrix sub-determining the corresponding k-th pre-coding matrix subset for A k includes:
- phase difference between two adjacent antennas in the nth vector in the precoding matrix subset is + nA k ;
- the phase difference of two mth antennas in two adjacent vectors in the kth precoding matrix subset is mA k , 0 ⁇ m ⁇ M,0 ⁇ n ⁇ N k ;
- a subset of precoding matrices determined for each phase interval is formed into a set of precoding matrices.
- B is a precoding matrix set
- B k is the kth precoding matrix subset
- v n k is The nth vector in the subset of precoding matrices
- a mn is the magnitude of the element (m, n), and is a real number.
- At least two of the numbers N k of the K precoding matrix subset vectors are different.
- At least two of the K phase intervals A k are different.
- a parameter determining unit configured to determine a parameter used to determine a precoding matrix set, where the parameter includes a phase parameter, an amplitude parameter, a quantity of vectors in a precoding matrix set, and a quantity of vectors in the first codebook set in the dual codebook feedback At least one of the number of vectors in the second codebook set in the dual codebook feedback, the parameter is not fixed;
- a sending unit configured to send first parameter indication information to the first network device, where the first parameter indication information is used to indicate the parameter.
- the parameter is cell-specific.
- the parameters are specific to the CSI process.
- the parameter is specific to a carrier.
- the parameter is specific to a rank rank.
- the parameter is specific to the precoding matrix subset in the dual codebook feedback mode
- the precoding matrix set determined by using the parameter is the first codebook in the dual codebook feedback mode Wl or a subset of precoding matrices of the second codebook W2.
- the parameter includes multiple sets of parameters for determining different subsets of precoding matrices, and a precoding matrix subset determined for each set of parameters respectively, forming a precoding matrix set.
- W W1*W2
- Wl [ ⁇ °]
- Wl is a diagonal matrix, where Each U is a subset of a precoding matrix, and each U corresponds to a set of parameters, and its corresponding U is determined according to the set of parameters.
- the method further includes:
- a receiving unit configured to receive second parameter indication information that is sent by the first network device, where the second parameter indication information is used to indicate a reference parameter used to determine a precoding matrix set, where the reference parameter includes a reference phase parameter, a reference amplitude parameter, a reference number of vectors in the precoding matrix set, a reference number of vectors in the first codebook set in the dual codebook feedback, and at least one of a reference number of vectors in the second codebook set in the dual codebook feedback .
- the parameter determining unit is specifically configured to use, according to a user ID, a cell ID of a cell, a CSI process ID, a carrier ID, a DMRS configuration parameter, and a CSI-RS configuration parameter. Determining, by the system bandwidth, the PRG, or the indication information carried in the subband size, the preset parameter corresponding to the indication information, as a parameter for determining a precoding matrix set.
- a receiving unit configured to receive matrix indication information of the precoding matrix selected from the determined precoding matrix set fed back by the first network device.
- the first network device and the second network device are both terminals.
- the method further includes:
- a set determining unit configured to determine a precoding matrix set using the parameter, the precoding matrix set including at least one precoding matrix.
- the parameter includes a first phase value, and an amplitude a m of the element (m, n) in the precoding matrix set , n , the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and the first phase value, the element (m, n) in the precoding matrix set
- the amplitude a mn , the number N of vectors in the precoding matrix set, and the number M of elements in each vector in the precoding matrix set is preset except for the parameters;
- the set determining unit is specifically configured to determine a vector constituting a set of precoding matrices by using a phase interval [0, ], an amplitude a mn , a quantity N, and a quantity M;
- 0 is the minimum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set; and the first phase value is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set.
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- v n is the nth vector in the set of precoding matrices
- the amplitude a m , n is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- the parameter includes a first phase value, and an amplitude (a, mn ) of an element (m, n) in the precoding matrix set , the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and the first phase value, the magnitude of the element (m, n) in the precoding matrix set a mn , the number N of vectors in the precoding matrix set, and the number M of elements in each vector in the precoding matrix set is preset except for the parameters;
- the set determining unit is specifically configured to use phase interval 0, amplitude a mn , quantity
- N and the number M determining a vector constituting the set of precoding matrices; where 0 is the minimum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set;
- ⁇ is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set.
- the form of the vector constituting the precoding matrix set is as follows:
- the parameter includes a second phase value %, a third phase value, an amplitude a mn of the element (m, n) in the precoding matrix set, and a number N of vectors in the precoding matrix set, each of the precoding matrix sets At least one of the number M of elements in the vector, and the second phase value third phase value, the magnitude a mn of the element (m, n) in the precoding matrix set, and the number N of vectors in the precoding matrix set,
- the number M of elements in each vector in the set of precoding matrices is preset except for the parameters;
- the set determining unit is specifically configured to determine a vector constituting a set of precoding matrices by using a phase interval amplitude a mn , a quantity N, and a quantity M;
- the second phase value is a minimum value of a phase difference of two adjacent antennas in a vector of a precoding matrix set
- the third phase value is a maximum value of phase differences of two adjacent antennas in a vector of precoding matrix sets.
- the form of the vector constituting the precoding matrix set is as follows:
- the parameter includes a second phase value third phase value, an amplitude a mn of an element (m, n) in the precoding matrix set, and a number N of vectors in the precoding matrix set , each of the precoding matrix sets The number M of elements in the vector, at least one of the integer L, and the second phase value third phase value, the magnitude of the element (m, n) in the precoding matrix set a mn , the number of vectors in the
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N, the nth vector in the precoding matrix set
- the phase difference between two adjacent antennas is ⁇ + ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is ⁇ .
- the parameter includes a second phase value, a third phase value, a phase interval ⁇ , and an element in the precoding matrix set ( m, n) amplitude a m ⁇ , at least one of the number ⁇ of elements in each vector in the precoding matrix set, and second phase value third phase value, phase interval ⁇ , precoding matrix set
- the amplitude a mn of the element (m, n) in the vector, and the number M of elements in each vector in the precoding matrix set is preset except for the parameter;
- the set determining unit is specifically configured to determine a vector constituting the precoding matrix set by using a phase interval phase interval VIII, an amplitude a mn, and a quantity M;
- the second phase value is a minimum value of a phase difference of two adjacent antennas in a vector of a precoding matrix set
- the third phase value is a maximum value of phase differences of two adjacent antennas in a vector of the precoding matrix set
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- v n is the nth vector in the set of precoding matrices
- the amplitude a mn is a real number
- the parameter includes a second phase value, a third phase value, a phase interval ⁇ , and an element in the precoding matrix set ( m, n) amplitude a m , n , at least one of the number M of elements in each vector in the precoding matrix set, at least one of the integer L, and the second phase value third phase value phase interval ⁇ , precoding matrix set
- the amplitude of the elements (m, n) a m , n the number M of elements in each vector in the precoding matrix set, the integer L is preset except for the parameters;
- the set determining unit is specifically configured to use a phase interval phase interval ⁇ , an amplitude a
- phase difference between two adjacent antennas in the vector is + ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is mA,
- the form of the vector constituting the precoding matrix set is as follows:
- the parameter includes K second phase values, K third phase values, and a precoding matrix subset
- the magnitude of the element (m, n) a m , n , the number of K precoding matrix subset vectors, at least one of the number M of elements in each vector of the precoding matrix subset, k represents the kth second
- the phase value represents the kth third phase value
- N k represents the number of vectors in the kth precoding matrix subset, l ⁇ k ⁇ K
- K second phase values, K third phase values precoding
- the set determining unit is specifically configured to determine a precoding matrix subset for each set of the second phase value and the third phase value respectively;
- the method comprises:
- phase value k Using a phase value k , a phase value k , an amplitude a mn , a quantity N k , and a quantity M, determining a vector constituting the subset of the precoding matrix; wherein the phase value k is two adjacent vectors in the vector of the precoding matrix subset The minimum value of the phase difference of the antenna; the phase value is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set;
- a precoding matrix subset is determined for each set of second phase values and third phase values, respectively, to form a precoding matrix set.
- B is the precoding matrix set
- B k is the kth precoding matrix subset
- v n k is the nth vector in the kth precoding matrix subset
- a mn is the element (m , the magnitude of n), and is a real number
- the phase difference between two adjacent antennas in the nth vector of the kth precoding matrix subset is %, k + nA k
- two phases in the kth precoding matrix subset The phase difference between the two mth antennas in the adjacent vector is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k .
- the parameter includes K second phase values, K third phase values, K phase intervals, and The amplitude a mn of the elements (m, n) in the subset of the coding matrix, at least one of the number M of elements in each vector in the precoding matrix subset, 2k represents the kth second phase value, indicating the kth Three phase values, A k represents the kth phase interval, l ⁇ k ⁇ K, and K second phase values, K third phase values, K phase intervals, elements in the precoding matrix subset (m, n
- the amplitude a mn the number M of elements in each vector in the precoding matrix subset is preset except for the parameters;
- the method comprises:
- phase value k is two adjacent vectors in the vector of the precoding matrix subset
- the minimum value of the phase difference of the antenna is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set
- the phase of two adjacent antennas in the nth vector of the kth precoding matrix subset The difference is %, k + nA k
- the phase difference of two mth antennas in two adjacent vectors in the k-th precoding matrix subset is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k
- N k is the number of vectors in the k-th precoding matrix subset, j_ A ⁇ k - ⁇ k
- N k - 1 will form a precoding matrix set for each set of precoding matrix subsets determined for each of the second phase value and the third phase value.
- B is the precoding matrix set
- B k is the kth precoding matrix subset
- v n k is the kth precoding
- the nth vector in the matrix subset, a mn is the magnitude of the element (m, n), and is a real number.
- At least two of the K second phase values 2k are different.
- At least two of the K phase intervals A K are different.
- the parameter includes a fourth phase value %, a phase interval ⁇ , and an element in the precoding matrix set (m, n) the magnitude a mn , the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and the fourth phase value phase interval ⁇ , in the precoding matrix set
- the amplitude of the elements (m, n) a m , n is preset except for the parameters;
- the set determining unit is specifically configured to determine, by using the fourth phase value, the phase interval VIII, the amplitude a m , n , the quantity N, and the quantity M, a vector constituting the precoding matrix set;
- the fourth phase value % is a minimum value of phase differences of two adjacent antennas in a vector of a precoding matrix set
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number
- the parameter includes K fourth phase values, K phase intervals, and elements in the precoding matrix subset ( m, n) amplitude a mn , the number of K precoding matrix subset vectors, at least one of the number M of elements in each vector in the precoding matrix subset, 4k represents the kth fourth phase value, A k represents the kth phase interval, N k represents the number of vectors in the kth precoding matrix subset, l ⁇ k ⁇ K, and K fourth phase values, K phase intervals, elements in the precoding matrix subset ( m, n) amplitude a mn , the number of K precoding matrix subset vectors, the number M of elements in each vector in the precoding matrix subset is preset except for the parameters;
- the set determining unit is specifically configured to determine a precoding matrix sub-segment for each phase interval, and determine a corresponding k-th pre-coding matrix subset for k and A k , including:
- phase value k is two of the vectors of the precoding matrix subset
- the minimum value of the phase difference of adjacent antennas; the phase difference of two adjacent antennas in the nth vector of the kth precoding matrix subset is %, k + nA k ; two phases in the kth precoding matrix subset
- the phase difference between two mth antennas in the adjacent vector is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k ;
- a subset of precoding matrices determined for each phase interval is formed into a set of precoding matrices.
- B is the set of precoding matrices
- B k is the subset of the kth precoding matrix
- v n k is the nth vector of the kth precoding matrix subset
- a mn is the magnitude of the element (m, n) , and is a real number.
- At least two of the K fourth phase values 4 k are different.
- At least two of the numbers N k of the K precoding matrix subset vectors are different.
- At least two of the K phase intervals A k are different.
- the parameter includes a fourth phase value %, K phase intervals, and an element in the precoding matrix subset (m , n) the amplitude a m , n , the number of K precoding matrix subset vectors, at least one of the number M of elements in each vector in the precoding matrix subset,
- a k represents K different phase intervals
- the kth phase interval, N k represents the number of vectors in the kth precoding matrix subset, l ⁇ k ⁇ K
- the fourth phase value %, K phase intervals, elements in the precoding matrix subset (m, n) the amplitude a m , n , the number of K precoding matrix subset vectors, the number M of elements in each vector in the precoding matrix subset is preset except for the parameters;
- the set determining unit is specifically configured to determine a precoding matrix sub-segment for each phase interval, and determine a corresponding k-th pre-coding matrix subset for A k , including:
- phase difference between two adjacent antennas in the nth vector in the precoding matrix subset is + nA k ;
- the phase difference of two mth antennas in two adjacent vectors in the kth precoding matrix subset is mA k , 0 ⁇ m ⁇ M,0 ⁇ n ⁇ N k ;
- a subset of precoding matrices determined for each phase interval is formed into a set of precoding matrices.
- B is a precoding matrix set
- B k is the kth precoding matrix subset
- v n k is The nth vector in the subset of the kth precoding matrix
- a mn is the magnitude of the element (m, n), and is a real number.
- At least two of the numbers N k of the K precoding matrix subset vectors are different.
- At least two of the K phase intervals A k are different.
- a network device is provided.
- the network device is referred to as a first network device, and specifically includes:
- a processor configured to determine a parameter used to determine a precoding matrix set, where the parameter includes a phase parameter, an amplitude parameter, a quantity of vectors in the precoding matrix set, and a quantity of vectors in the first codebook set in the dual codebook feedback, At least one of the number of vectors in the second codebook set in the dual codebook feedback, the parameter is not fixed; and determining the precoding matrix set using the parameter, the precoding matrix set including at least one pre Coding matrix
- the parameter is specific to a cell.
- the parameters are terminal specific.
- the parameters are specific to the CSI process.
- the parameter is specific to a carrier.
- the parameter is specific to a rank rank.
- the parameter is specific to the precoding matrix subset in the dual codebook feedback mode
- the precoding matrix set determined using the parameters is a precoding matrix subset of the first codebook W1 or the second codebook W2 in the dual codebook feedback mode.
- the parameter includes multiple sets of parameters for determining different subsets of precoding matrices
- the processor is specifically configured to determine a respective subset of precoding matrices by using each set of parameters, and form a precoding matrix set for the precoding matrix subsets respectively determined for each set of parameters.
- the communication interface is specifically configured to receive
- the first parameter indication information is sent by using a broadcast signaling, a radio resource control RRC signaling, or a dynamic signaling.
- the communications interface is further configured to: feed back, by the second network device, the second parameter indication information, where the second parameter indication information is used to indicate the determining the precoding matrix.
- the reference parameter includes a reference phase parameter, a reference amplitude parameter, a reference number of vectors in the precoding matrix set, a reference number of vectors in the first codebook set in the dual codebook feedback, and a double codebook feedback At least one of the reference quantities of the vectors in the two codebook sets.
- the processor is specifically configured to: according to the user ID, the cell ID of the cell, the CSI process ID, the carrier ID, the DMRS configuration parameter, the CSI-RS configuration parameter, Determining, by the first network device, the system bandwidth, the PRG, or the indication information carried in the subband size, determining a preset parameter corresponding to the indication information, as a parameter for determining a precoding matrix set.
- the processor is further configured to: select, from the determined precoding matrix set, a precoding matrix that needs to be reported to the second network device;
- the communication interface is specifically configured to feed back the matrix indication information of the selected precoding matrix to the second network device.
- the first network device is a terminal, and the second network device is a base station; or
- the first network device and the second network device are both base stations; or
- the first network device and the second network device are both terminals.
- the parameter includes a first phase value precoding The amplitude a mn of the elements (m, n) in the matrix set, the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and the first phase value ⁇ , the amplitude a
- 0 is the minimum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set; and the first phase value is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set.
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- the parameter includes an amplitude a mn of the element (m, n) in the first phase value precoding matrix set, and a quantity N of the precoding matrix set.
- a processor specifically for using a phase interval 0, an amplitude a mn , a quantity N, and a quantity M,
- N determines the vector constituting the set of precoding matrices
- 0 is the minimum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set
- a processor specifically configured to determine a vector constituting a set of precoding matrices by using a phase interval amplitude a mn , a quantity N, and a quantity M;
- the second phase value is a minimum value of a phase difference of two adjacent antennas in a vector of a precoding matrix set
- the third phase value is a maximum value of phase differences of two adjacent antennas in a vector of precoding matrix sets.
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N, the nth vector in the precoding matrix set
- the phase difference between two adjacent antennas is % + ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is ⁇ .
- L ' L is a vector constituting a set of precoding matrices
- B is a set of precoding matrices
- ⁇ ⁇ is the nth vector in the precoding matrix set
- the amplitude a mn is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N, the nth vector in the precoding matrix set
- the phase difference between two adjacent antennas is + ⁇ ; two of the two adjacent vectors in the precoding matrix set are! !
- the phase difference of the antenna is
- the parameter includes a second phase value ⁇ 2 a third phase value phase interval ⁇ , an amplitude a mn of elements (m, n) in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and a second phase value ⁇ ⁇ , first Phase values of the phase interval ⁇ , the
- the second phase value is a minimum value of a phase difference of two adjacent antennas in a vector of a precoding matrix set
- the third phase value is a maximum value of phase differences of two adjacent antennas in a vector of the precoding matrix set
- phase difference between two adjacent antennas in the nth vector in the precoding matrix set is ⁇ 3 ⁇ 4+ ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is ⁇ ,
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number
- the parameter includes a second phase value ⁇ 2 a third phase value phase interval ⁇ , an amplitude a mn of elements (m, n) in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and at least one of integers L, and second Phase value Three phase values, phase interval [
- L ' L determines a vector constituting a set of precoding matrices; where is the minimum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set; the phase difference of two adjacent antennas in the vector of the precoding matrix set Maximum value The phase difference between two adjacent antennas in the nth vector in the precoding matrix set is + ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is mA,
- the form of the vector constituting the precoding matrix set is as follows:
- nC iC B is a precoding matrix set
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number
- the processor is specifically configured to determine a precoding matrix subset for each set of the second phase value and the third phase value respectively;
- the method comprises:
- phase value k Using a phase value k , a phase value k , an amplitude a mn , a quantity N k , and a quantity M, determining a vector constituting the subset of the precoding matrix; wherein the phase value k is two adjacent vectors in the vector of the precoding matrix subset The minimum value of the phase difference of the antenna; the phase value 3 , k is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set;
- a precoding matrix subset is determined for each set of second phase values and third phase values, respectively, to form a precoding matrix set.
- B is the precoding matrix set
- B k is the kth precoding matrix subset
- v n k is the nth vector in the kth precoding matrix subset
- a mn is the element (m, The magnitude of n), and is a real number
- the phase difference between two adjacent antennas in the nth vector of the kth precoding matrix subset is %, k + nA k ; two adjacent in the kth precoding matrix subset
- the phase difference between the two mth antennas in the vector is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k .
- at least two of the numbers N k of the K precoding matrix subset vectors are different.
- the parameter includes K second phase values, K third phase values, K phase intervals, an amplitude a mn of elements (m, n) in the precoding matrix subset, at least one of the number M of elements in each vector in the precoding matrix subset, 2k represents Kth
- the two phase values, 3 , k represent the kth third phase value
- the processor is specifically configured to determine a precoding matrix subset for each set of the second phase value and the third phase value respectively;
- the method comprises:
- phase value k is two adjacent vectors in the vector of the precoding matrix subset
- the minimum value of the phase difference of the antenna is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set
- the phase of two adjacent antennas in the nth vector of the kth precoding matrix subset The difference is + nA k
- the phase difference between two mth antennas in two adjacent vectors in the k-th precoding matrix subset is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k
- N k is the first Number of k precoding matrix subset vectors Quantity, j_ A ⁇ k - ⁇ k
- N k - 1 will form a precoding matrix set for each set of precoding matrix subsets determined for each of the second phase value and the third phase value.
- At least two of the K phase intervals A k are different.
- the parameter includes a fourth phase value ⁇ 4 , The phase interval ⁇ , the amplitude a m , n of the elements (m, n) in the precoding matrix set, the number N of vectors in the precoding matrix set, and at least one of the number M of elements in each vector in the precoding matrix set kind, And the
- the processor is specifically configured to determine, by using the fourth phase value, the phase interval VIII, the amplitude a mn , the quantity N, and the quantity M, a vector constituting the precoding matrix set;
- the fourth phase value % is a minimum value of phase differences of two adjacent antennas in a vector of a precoding matrix set
- the phase difference between two adjacent antennas in the nth vector in the precoding matrix set is %+ ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is mA, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number
- the parameter includes K fourth phases Value, K phase intervals, the amplitude a mn of the elements (m, n) in the precoding matrix subset, the number of K precoding matrix subset vectors, the number of elements in each vector in the precoding matrix subset M At least one, k represents a kth fourth phase value, A k
- phase value k is two of the vectors of the precoding matrix subset
- the minimum value of the phase difference of adjacent antennas; the phase difference of two adjacent antennas in the nth vector of the kth precoding matrix subset is 4 , k + n A k ; two of the kth precoding matrix subsets
- the phase difference between two mth antennas in the adjacent vector is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k ;
- a subset of precoding matrices determined for each phase interval is formed into a set of precoding matrices.
- B is the set of precoding matrices
- B k is the subset of the kth precoding matrix
- v n k is the nth vector of the kth precoding matrix subset
- a mn is the magnitude of the element (m, n) , and is a real number.
- At least two of the K fourth phase values 4k are different.
- at least two of the numbers N k of the K precoding matrix subset vectors are different.
- At least two of the K phase intervals A k are different.
- the parameter includes a fourth phase value ⁇ 4 , The phase interval, the amplitude of the elements (m, n) in the precoding matrix subset a m , n , the number of K precoding matrix subset vectors, the number of elements in each vector in the precoding matrix subset M to One kind, A k denotes the fourth phase value ⁇ 4 .
- phase difference between two adjacent antennas in the nth vector in the precoding matrix subset is + nA k ;
- the phase difference of two mth antennas in two adjacent vectors in the kth precoding matrix subset is mA k , 0 ⁇ m ⁇ M,0 ⁇ n ⁇ N k ;
- a subset of precoding matrices determined for each phase interval is formed into a set of precoding matrices.
- B is a precoding matrix set
- B k is the kth precoding matrix subset
- Vn k is the first
- the nth vector of the k precoding matrix subsets, a mn is the magnitude of the element (m, n), and is a real number.
- At least two of the numbers N k of the K precoding matrix subset vectors are different.
- At least two of the K phase intervals A k are different.
- a network device is provided.
- the network device is referred to as a second network device, and specifically includes:
- a processor configured to determine a parameter used to determine a precoding matrix set, where the parameter includes a phase parameter, an amplitude parameter, a quantity of vectors in the precoding matrix set, and a quantity of vectors in the first codebook set in the dual codebook feedback, At least one of the number of vectors in the second codebook set in the dual codebook feedback, the parameter is not fixed;
- a communication interface configured to send first parameter indication information to the first network device, where the first parameter indication information is used to indicate the parameter.
- the parameters are cell specific.
- the parameter is specific to a terminal of.
- the parameter is specific to a carrier.
- the parameter is specific to the precoding matrix subset in the dual codebook feedback mode
- the parameter includes multiple sets of parameters for determining different subsets of precoding matrices, and a precoding matrix subset determined for each set of parameters respectively, forming a precoding matrix set.
- the communications interface is specifically configured to send the first parameter indication information to the first network device by using the broadcast signaling, the RRC signaling, or the dynamic signaling.
- the processor is specifically configured to use, according to the user ID, the cell ID of the cell, the CSI process ID, the carrier ID, the DMRS configuration parameter, the CSI-RS configuration parameter, Determining, by the first network device, the system bandwidth, the PRG, or the indication information carried in the subband size, determining a preset parameter corresponding to the indication information, as a parameter for determining a precoding matrix set.
- the communications interface is further configured to receive the matrix indication information of the precoding matrix selected from the determined precoding matrix set fed back by the first network device.
- the first network device and the second network device are both base stations; or
- the processor is further configured to determine, by using the parameter, a precoding matrix set, where the precoding matrix set includes at least one Precoding matrix.
- the parameter includes a first phase value, and an amplitude a m of the element (m, n) in the precoding matrix set , n , the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and the first phase value, the element (m, n) in the precoding matrix set
- the magnitude a mn , the number N of vectors in the precoding matrix set, and the number of elements in each vector in the precoding matrix set M In addition to the parameters, it is preset;
- 0 is the minimum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set; and the first phase value is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set.
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- the parameter includes a first phase value, and an amplitude a m of the element (m, n) in the precoding matrix set , n , the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and the first phase value, the element (m, n) in the precoding matrix set
- the amplitude a mn , the number N of vectors in the precoding matrix set, and the number M of elements in each vector in the precoding matrix set is preset except for the parameters;
- the processor is also used to use phase interval 0, amplitude a mn , number N, and quantity M,
- N determines the vector constituting the set of precoding matrices
- 0 is the minimum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set
- ⁇ is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set.
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- the parameter includes a second phase value %, a third phase value, and an element in the precoding matrix set (m, n) the magnitude a mn , the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and the second phase value third phase value, precoding matrix set
- the magnitude of the element (m, n) a mn , the number N of vectors in the precoding matrix set, and the number M of elements in each vector in the precoding matrix set is preset except for the parameter;
- a processor further configured to determine a vector constituting the set of precoding matrices using the phase interval magnitude a mn , the number N, and the number M;
- the second phase value is a minimum value of a phase difference of two adjacent antennas in a vector of a precoding matrix set
- the third phase value is a maximum value of phase differences of two adjacent antennas in a vector of precoding matrix sets.
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N, the nth vector in the precoding matrix set
- the phase difference between two adjacent antennas is % + ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is ⁇
- the parameter includes a second phase value, a third phase value, and an element in the precoding matrix set (m, n
- the amplitude a mn the number N of vectors in the precoding matrix set, the number M of elements in each vector in the precoding matrix set, at least one of the integer L, and the second phase value third phase value, precoding
- the magnitude of the elements (m, n) in the matrix set a mn the number N of vectors in the precoding matrix set, the number M of elements in each vector in the precoding matrix set, except for the parameters in the integer L Preset; processor, also used to determine the phase interval, amplitude a mn , number N, and quantity M
- L ' L constitutes a vector of precoding matrix sets; wherein, is the minimum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set; is the phase difference of two adjacent antennas in the vector of the precoding matrix set Maximum value.
- the form of the vector constituting the precoding matrix set is as follows:
- B is a set of precoding matrices
- ⁇ ⁇ is the nth vector in the precoding matrix set
- the amplitude a mn is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N, the nth vector in the precoding matrix set
- the phase difference between two adjacent antennas is + ⁇ ; two of the two adjacent vectors in the precoding matrix set are! !
- the phase difference of the antenna is
- the parameter includes a second phase value, a third phase value, a phase interval ⁇ , and an element in the precoding matrix set ( m, n) amplitude a mn , at least one of the number M of elements in each vector in the precoding matrix set, and second phase value third phase value, phase interval ⁇ , elements in the precoding matrix set ( m, n) amplitude a mn , the number M of elements in each vector in the precoding matrix set is preset except for the parameters;
- a processor further configured to determine a vector constituting the set of precoding matrices using a phase interval phase interval VIII, an amplitude a m , n , and a quantity M;
- the second phase value is a minimum value of a phase difference of two adjacent antennas in a vector of a precoding matrix set
- the third phase value is a maximum value of phase differences of two adjacent antennas in a vector of the precoding matrix set
- phase difference between two adjacent antennas in the nth vector in the precoding matrix set is ⁇ 3 ⁇ 4+ ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is ⁇ ,
- B is a set of precoding matrices
- ⁇ ⁇ is the nth vector in the set of precoding matrices
- the amplitude a mn is a real number
- the parameter includes a second phase value, a third phase value, a phase interval ⁇ , and an element in the precoding matrix set ( m, n) amplitude a mn , the number M of elements in each vector in the precoding matrix set, at least one of integer L, and the second phase value third phase value phase interval ⁇ , in the precoding matrix set
- the amplitude a mn of the element (m, n), the number M of elements in each vector in the precoding matrix set, the integer L is preset except for the parameter; the processor is also used to use the phase interval, Phase interval eight, amplitude a mn and number ⁇ ,
- L ' L determines a vector constituting a set of precoding matrices
- the form of the vector constituting the precoding matrix set is as follows:
- the parameter includes K second phase values, K third phase values, and a subset of the precoding matrix
- the magnitude of the element (m, n) a mn the number of vectors in the K precoding matrix subsets, at least one of the number M of elements in each vector in the precoding matrix subset, 2k represents the kth second phase value , represents the kth third phase value, N k represents the number of vectors in the kth precoding matrix subset, l ⁇ k ⁇ K, and K second phase values, K third phase values, precoding matrix
- the amplitude of the concentrated element (m, n) is a mn ,
- the number of vectors in the K precoding matrix subsets, the number of elements in each vector in the precoding matrix subset M is preset except for the parameters;
- the processor is further configured to determine a precoding matrix subset for each set of the second phase value and the third phase value, respectively;
- the corresponding k-th precoding matrix subset is determined and determined, and includes:
- phase value k a phase value, k , an amplitude a mn , a quantity N k , and a quantity M, determining a vector constituting the subset of the precoding matrix; wherein the phase value k is two of the vectors of the precoding matrix subset The minimum value of the phase difference of the adjacent antennas; the phase value is the maximum value of the phase differences of two adjacent antennas in the vector of the precoding matrix set;
- a precoding matrix subset is determined for each set of second phase values and third phase values, respectively, to form a precoding matrix set.
- B is the set of precoding matrices
- B k is the subset of the kth precoding matrix
- v n k is the nth vector of the kth precoding matrix subset
- a mn is the magnitude of the element (m, n)
- the phase difference of two adjacent antennas in the nth vector of the kth precoding matrix subset is %, k + n A k ; two of the two adjacent vectors in the kth precoding matrix subset
- the phase difference of the mth antenna is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k .
- At least two of the K second phase values 2k are different.
- At least two of the numbers N k of the K precoding matrix subset vectors are different.
- the parameter includes K second phase values, K third phase values, K phase intervals, and The amplitude a mn of the elements (m, n) in the subset of the coding matrix, at least one of the number M of elements in each vector in the precoding matrix subset, 2k represents the kth second phase value, indicating the kth Three phase values, A k represents the kth phase interval, l ⁇ k ⁇ K, and K second phase values, K third phase values, K phase intervals, elements in the precoding matrix subset (m, n
- the amplitude a m , n the number M of elements in each vector in the precoding matrix subset is preset except for the parameters;
- the processor is further configured to determine, respectively, a precoding matrix for each set of the second phase value and the third phase value, where the corresponding kth precoding matrix subset is determined for k and includes:
- phase value k is two adjacent vectors in the vector of the precoding matrix subset
- the minimum value of the phase difference of the antenna is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set
- the phase of two adjacent antennas in the nth vector of the kth precoding matrix subset The difference is + nA k
- the phase difference between two mth antennas in two adjacent vectors in the k-th precoding matrix subset is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k
- N k is the first Number of k precoding matrix subset vectors Quantity, j_ A ⁇ k - ⁇ k
- N k - 1 will form a precoding matrix set for each set of precoding matrix subsets determined for each of the second phase value and the third phase value.
- B is the precoding matrix set
- B k is the kth precoding matrix subset
- v n k is the nth vector in the kth precoding matrix subset
- a mn Is the magnitude of the element (m, n) and is a real number.
- At least two of the K phase intervals A k are different.
- the parameter includes a fourth phase value %, a phase interval ⁇ , and an element in the precoding matrix set (m, n) the magnitude a mn , the number N of vectors in the precoding matrix set, at least one of the number M of elements in each vector in the precoding matrix set, and the fourth phase value phase interval ⁇ , in the precoding matrix set
- the amplitude of the elements (m, n) a m , n is preset except for the parameters;
- a processor configured to determine a vector constituting the set of precoding matrices using the fourth phase value, phase interval eight, amplitude a mn , number N, and number M;
- the fourth phase value % is a phase of two adjacent antennas in a vector of a precoding matrix set.
- the phase difference between two adjacent antennas in the nth vector in the precoding matrix set is %+ ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is mA, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- B is a set of precoding matrices
- v n is the nth vector in the precoding matrix set
- the amplitude a mn is a real number
- the parameter includes K fourth phase values, K phase intervals, and elements in the precoding matrix subset ( m, n) amplitude a m , n , the number of K precoding matrix subset vectors, at least one of the number M of elements in each vector in the precoding matrix subset, 4k represents the kth fourth phase value , A k represents the kth phase interval, N k represents the number of vectors in the kth precoding matrix subset, l ⁇ k ⁇ K, and K fourth phase values, K phase intervals, in the precoding matrix subset
- the magnitude of the element (m, n) a mn the number of vectors in the K precoding matrix subsets, the number M of elements in each vector in the precoding matrix subset is preset except for the parameters;
- the processor is further configured to determine a precoding matrix subset for each phase interval separately;
- determining a corresponding k-th precoding matrix subset for k and A k including:
- phase value k is two of the vectors of the precoding matrix subset
- the minimum value of the phase difference of adjacent antennas; the phase difference between two adjacent antennas in the nth vector of the kth precoding matrix subset is ⁇ + nA k ; two adjacent vectors in the kth precoding matrix subset Two mth
- the phase difference of the antennas is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k ;
- a subset of precoding matrices determined for each phase interval is formed into a set of precoding matrices.
- B is the set of precoding matrices
- B k is the subset of the kth precoding matrix
- v n k is the nth vector of the kth precoding matrix subset
- a mn is the magnitude of the element (m, n) , and is a real number.
- At least two of the K fourth phase values 4 k are different.
- At least two of the numbers N k of the K precoding matrix subset vectors are different.
- At least two of the K phase intervals A k are different.
- the parameter includes a fourth phase value %, K phase intervals, and an element in the precoding matrix subset (m , n) the amplitude a m , n , the number of K precoding matrix subset vectors, at least one of the number M of elements in each vector in the precoding matrix subset,
- a k represents K different phase intervals
- the kth phase interval, N k represents the number of vectors in the kth precoding matrix subset, l ⁇ k ⁇ K
- the fourth phase value %, K phase intervals, elements in the precoding matrix subset (m, n) the amplitude a m , n , the number of K precoding matrix subset vectors, the number M of elements in each vector in the precoding matrix subset is preset except for the parameters;
- the processor is further configured to determine a precoding matrix subset for each phase interval separately; Wherein, determining a corresponding subset of the kth precoding matrix for A k includes:
- phase value is two adjacent vectors in the vector of the precoding matrix subset
- the phase value is two adjacent vectors in the vector of the precoding matrix subset
- the phase difference between two adjacent antennas in the nth vector of the kth precoding matrix subset is + nA k
- the phase difference of two mth antennas in two adjacent vectors in the k-th precoding matrix subset is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k ;
- B is the precoding matrix set
- B k is the kth precoding matrix subset
- v n k is the nth vector in the kth precoding matrix subset
- a mn is the element (m, n) Amplitude, and is a real number.
- At least two of the numbers N k of the K precoding matrix subset vectors are different.
- At least two of the K phase intervals A k are different.
- the first network device determines a parameter for determining a precoding matrix set, where the parameter includes a phase parameter, an amplitude parameter, a quantity of a vector in the precoding matrix set, and a first code in the dual codebook feedback.
- the number of vectors in the set, the second codebook set in the double codebook feedback At least one of the quantities, and the parameter is not fixed, and the parameter is used to determine a set of precoding matrices, and the set of precoding matrices includes at least one precoding matrix.
- the precoding matrix set determined using the parameter is also not fixed, so that the subsequent variable precoding matrix set feedback precoding matrix indication It can be more flexible, and thus can improve the communication quality and overall system performance based on the precoding matrix indicating feedback communication.
- FIG. 1 is a flowchart of a method for determining a precoding matrix set according to an embodiment of the present invention
- FIG. 2 is a flowchart of a method for sending parameter indication information according to an embodiment of the present invention
- Embodiment 12 of the present invention is a schematic diagram of an application scenario provided in Embodiment 12 of the present invention.
- FIG. 4 is a schematic structural diagram of a precoding matrix set determining apparatus according to Embodiment 13 of the present invention
- FIG. 5 is a schematic structural diagram of a parameter indication information sending apparatus according to Embodiment 14 of the present invention. Schematic diagram of the device;
- FIG. 7 is a schematic structural diagram of a network device according to Embodiment 16 of the present invention. detailed description
- the embodiment of the present invention provides a method for determining a precoding matrix set, a method for transmitting parameter indication information, and a device, and a preferred embodiment of the present invention is described below with reference to the accompanying drawings. It is to be understood that the preferred embodiments described herein are intended to illustrate and explain the invention and are not intended to limit the invention. And without conflict In the case where the embodiments and the features in the embodiments of the present application can be combined with each other.
- An embodiment of the present invention provides a method for determining a precoding matrix set.
- the method includes: Step 101: A first network device determines a parameter used to determine a precoding matrix set, where the parameter includes a phase parameter, an amplitude parameter, and a pre- The number of vectors in the set of coding matrices, the number of vectors in the first codebook set in the dual codebook feedback, and at least one of the number of vectors in the second codebook set in the dual codebook feedback, the parameter is not fixed .
- the parameter is not fixed, indicating that the parameter is a variable, that is, the parameter is not a fixed value.
- Step 102 Determine a precoding matrix set by using the parameter, where the precoding matrix set includes at least one precoding matrix.
- the first network device may determine the parameter used to determine the precoding matrix set according to some communication information used in the communication process, for example, may include the communication information in an implicit manner. All the information or the partial information is used as the indication information, and the corresponding preset parameter is set in advance for the different indication information, so that the first network device can determine the preset parameter corresponding to the indication information according to the indication information carried in the communication information. As the parameter used to determine the set of precoding matrices.
- the communication information may be one of the following information:
- the first network device may also receive the first parameter indication information sent by the second network device, where the first parameter indication information is used to indicate the parameter used to determine the precoding matrix set, and according to The first parameter indication information determines the parameter.
- the second network device notifying the first network device in an explicit manner for determining the parameter of the precoding matrix.
- the embodiment of the present invention further provides a method for sending parameter indication information, as shown in FIG. 2, include:
- Step 201 The second network device determines a parameter used to determine a precoding matrix set, where the parameter includes a phase parameter, an amplitude parameter, a quantity of vectors in the precoding matrix set, and a quantity of vectors in the first codebook set in the dual codebook feedback. At least one of the number of vectors in the second codebook set in the dual codebook feedback, the parameter is not fixed.
- Step 202 Send first parameter indication information to the first network device, where the first parameter indication information is used to indicate the parameter.
- the second network device may send the first parameter indication information to the first network device by using broadcast information signaling, radio resource control RRC signaling, or dynamic signaling.
- the first network device may further send, to the second network device, second parameter indication information, where the second parameter indication information is used to indicate a reference parameter used to determine a precoding matrix set, where the reference parameter includes a reference phase parameter, and a reference amplitude The parameter, the reference number of vectors in the precoding matrix set, the reference number of vectors in the first codebook set in the dual codebook feedback, and the reference number of vectors in the second codebook set in the dual codebook feedback.
- the second parameter indication information sent by the first network device to the second network device may be referenced by the second network device when determining the parameter used to determine the precoding matrix to be used by the first network device, corresponding,
- the parameter indicated by the first parameter indication information sent by the network device to the first network device may be the same as or different from the reference parameter indicated by the received second parameter indication information sent by the first network device.
- the parameter used to determine the precoding matrix set is not fixed. Further, the parameter may be specifically changed and adjusted based on the following information:
- the parameter may be specific to the cell, that is, the parameter may be different for different cells; or may be specific to the terminal, that is, the parameter may be different for different terminals; or may be specific to the CSI process, That is, the parameters may be different for different CSI processes;
- the parameters may be specific to the carrier, that is, different parameters for different carriers; or may be specific to the rank rank, that is, the parameters may be different for different ranks;
- the determined precoding matrix set is a dual codebook A precoding matrix subset of the first codebook W1 or the second codebook W2 in the feedback mode.
- the specific change and adjustment basis may be flexibly set according to the needs of the actual application, for example, the range of the coverage of the cell coverage is different, when the parameter is used to determine the parameter of the precoding matrix set based on the foregoing various information adjustments and changes.
- the parameters may be different; the distance between the terminal and the base station in the same cell is different, and the parameter may be different.
- the parameter used to determine the precoding matrix set may include multiple sets of parameters for determining different precoding matrix subsets, and correspondingly,
- each group of parameters may be used to determine respective precoding matrix subsets, and the precoding matrix subsets respectively determined for each group of parameters are combined to form a precoding matrix set.
- the first network device may further select a precoding matrix that needs to be reported to the second network device, and to the second network device.
- the matrix indicating information of the precoding matrix selected is fed back to complete the feedback indicated by the precoding matrix.
- the selection method of the precoding matrix may be a prior art, and is not described in detail herein.
- the feedback mode of the precoding matrix indication may also adopt a prior art, such as single codebook feedback and dual codebook feedback. Detailed descriptions are not repeated here.
- the second network device may also use the parameter to determine a precoding matrix set, and after receiving the matrix indication information sent by the first network device, determine the first network according to the matrix indication information.
- the precoding matrix selected by the device, and using the precoding matrix to A network device sends a signal.
- the precoding matrix set when the first network device and the second network device determine the precoding matrix set by using the parameter, the precoding matrix set may be dynamically generated by using the parameter, or may be based on multiple optional parameters in advance.
- the corresponding precoding matrix set is generated separately, and the corresponding precoding matrix set can be directly determined according to the currently determined parameter, and no dynamic generation is needed.
- the precoding matrix set in addition to the parameters included in the parameter that are not fixed, other parameters may be used, and the other parameters may be preset fixed parameters.
- the following describes how to determine the set of precoding matrices in different specific forms for determining the parameters of the precoding matrix set that are not fixed.
- the first network device may be a signal transmitting end, and correspondingly, the second network device is a signal receiving end.
- the first network device and the second network device may both be base stations, or , are all terminals, or one of them is a base station, and the other is a terminal.
- the parameter for determining the precoding matrix set includes the first phase value ⁇ the amplitude of the element (m, n) in the precoding matrix set a m , n , the number of vectors in the precoding matrix set
- the number of elements in each vector in the precoding matrix set M is preset except for the parameter
- N may be obtained by using the first parameter indication information or an implicit manner, and the others are fixed; or, the first parameter indication information or the implicit manner may be obtained, and the others are fixed.
- the parameter is used to determine the precoding matrix set, including:
- the first phase value is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set.
- B denotes a precoding matrix set, and the vector constituting B is [v. Vl ⁇ v N —”, where different elements of each vector correspond to different antennas, for example, v n V 0. corresponds to the addition of v- th antenna to vM VoI:.
- v ln corresponds to the weight of the first antenna
- v M — ln corresponds to the weight of the M-1th antenna.
- the phase difference between two adjacent antennas of the nth vector v n is V. Adjacent two antennas
- the phase difference is 0, which is the smallest phase difference between two adjacent antennas in all vectors.
- the phase difference between two adjacent antennas of v N — i is the largest phase difference between two adjacent antennas in all vectors. .
- the parameter for determining a precoding matrix set includes a first phase value ⁇ an amplitude a m , n of an element (m, n) in a precoding matrix set, and a precoding matrix set Number of medium vectors
- N may be obtained by the first parameter indication information or implicitly, and the others are fixed; or may be obtained by the first parameter indication information or implicitly, and the others are fixed.
- the parameter is used to determine the precoding matrix set, including:
- ⁇ is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set ⁇ N
- B represents a set of precoding matrices, and the vector constituting B is [, v 0 : v N _J , where each vector
- v n V. n corresponds to the ll, n weight of the 0th antenna, v ln corresponds to the weight of the first antenna, and v M - ln corresponds to the weight of the M-1th antenna ( where n The adjacent two antennas of the vector v n have a phase difference of V.
- phase difference is 0, which is the smallest phase difference between two adjacent antennas in all vectors, and the phase difference between two adjacent antennas of v N — i is ( ⁇ _ 1 , which is the adjacent two antennas in all vectors
- the phase difference is the largest.
- B is a set of precoding matrices
- v n is the nth vector in the set of precoding matrices
- the amplitude a m , n is a real number, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- the parameter for determining the precoding matrix set includes a second phase value ⁇ 2 , an amplitude a mn of the element (m, n) in the third phase value precoding matrix set, and a precoding matrix set.
- the number N of medium vectors, at least one of the number M of elements in each vector in the precoding matrix set, and the second phase value third phase value, the amplitude a of the elements (m, n) in the precoding matrix set a m , n , the number N of vectors in the precoding matrix set, and the number M of elements in each vector in the precoding matrix set is preset except for the parameter;
- N can be obtained by the first parameter indication information or implicitly, and the others are fixed;
- N may be obtained by the first parameter indication information or implicitly, and the others are fixed; or, the % parameter may be obtained by the first parameter indication information or implicitly, and the others are fixed.
- the parameter is used to determine the precoding matrix set, including:
- the second phase value % is a minimum value of phase differences of two adjacent antennas in the vector of the precoding matrix set
- the third phase value is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set.
- B denotes a precoding matrix set, and the vector constituting B is [v. Vl ... v N —”, where each vector Different elements correspond to different antennas, for example, v n v 0 . Corresponding to the addition of the 0th antenna
- the phase difference between two adjacent antennas of N-1 is that the phase difference between two adjacent antennas in all vectors is the smallest, and the phase difference between two adjacent antennas of ⁇ ⁇ _! is, which is the adjacent two of all vectors.
- the phase difference of the antenna is the largest.
- the two mth antennas in every two adjacent vectors in B have the same phase difference, both of which are mA.
- the form of the vector constituting the set of precoding matrices is as follows: a, n ea, , ea, , ej(Ml)3 ⁇ 4 j(M-1)( % + ⁇ ) j(M-1)
- the parameter for determining the precoding matrix set includes a second phase value ⁇ 2 , and the amplitude (m, n) of the third phase value precoding matrix set a m , n , precoding
- the number of elements M, the integer L is preset except for this parameter;
- J-parameter indication information For example, it can be obtained by J-parameter indication information or implicitly, and everything else is fixed;
- determining the precoding matrix set by using the number includes: determining a precoding matrix by using a phase interval, an amplitude a mn , a quantity N, and a quantity M
- the minimum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set.
- the weight, v ln corresponds to the weight of the first antenna, and v M — ln corresponds to the weight of the M-1th antenna.
- phase difference between two adjacent antennas is that the phase difference between two adjacent antennas in all vectors is the smallest, and the phase difference between two adjacent antennas is the adjacent two of all vectors.
- the phase difference of the antenna is the largest
- the parameter for determining the precoding matrix set includes a second phase value ⁇ 2 , a third phase value phase interval ⁇ , and an amplitude a mn of the element (m, n) in the precoding matrix set, At least one of the number M of elements in each vector in the precoding matrix set, and the second phase value third phase value phase interval ⁇ , the amplitude of the element (m, n) in the precoding matrix set a mn , pre
- the number M of elements in each vector in the set of coding matrices is preset except for the parameter;
- ⁇ can be obtained by the first parameter indication information or implicitly, and the others are fixed;
- the parameter is used to determine the precoding matrix set, including:
- the second phase value % is a phase difference between two adjacent antennas in the vector of the precoding matrix set Minimum value
- the third phase value is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set
- phase difference between two adjacent antennas in the nth vector in the precoding matrix set is %+ ⁇ ; the phase difference of two mth antennas in two adjacent vectors in the precoding matrix set is mA,
- ⁇ denotes a set of precoding matrices, the vector constituting ⁇ is [, ⁇ 0 : where different elements of each vector correspond to different antennas, for example,
- the weight, ⁇ 1 ⁇ corresponds to the weight of the first antenna, and ⁇ ⁇ - ln corresponds to the weight of the M- 1th antenna.
- the phase difference between two adjacent antennas of the nth vector ⁇ ⁇ is V.
- the phase difference of the adjacent two antennas is that the phase difference between two adjacent antennas in all vectors is the smallest, and the phase difference between two adjacent antennas of v N — is the adjacent two antennas in all vectors.
- the phase difference is the largest.
- the two mth antennas in every two adjacent vectors in B have the same phase difference, both of which are mA.
- Nj(Ml)3 ⁇ 4 j(M-1)( % + ⁇ ) j(Ml)3 ⁇ 4 The number M of elements in each vector in the set of precoding matrices, at least one of integers L, and the second phase value third phase value, phase interval ⁇ , the magnitude of the elements (m, n) in the precoding matrix set a m , n , the number M of elements in each vector in the precoding matrix set, the integer L is preset except for the parameter;
- ⁇ can be obtained by the first parameter indication information or implicitly, and the others are fixed;
- determining the precoding matrix set by using the parameter comprises: determining the precoding by using a phase interval, a phase interval of eight, an amplitude a mn and a quantity ⁇
- a vector of a set of matrices wherein, is a minimum value of phase differences of two adjacent antennas in a vector of precoding matrix sets; a maximum value of phase differences of two adjacent antennas in a vector of precoding matrix sets; precoding matrix
- B denotes a precoding matrix set, and the vector constituting B is [, v 0 : v N _J, where different elements of each vector correspond to different antennas, for example, v n V. n corresponds to the addition of the 0th antenna
- the weight, v ln corresponds to the weight of the first antenna, and v M — 1n corresponds to the weight of the M-1th antenna ( where the phase difference between the two adjacent antennas of the nth vector v n The adjacent two are ⁇ + ⁇ , V.
- phase difference of the line is that the phase difference between two adjacent antennas in all vectors is the smallest, and the phase difference between two adjacent antennas of v N — is that the phase difference between two adjacent antennas in all vectors is the largest.
- the two mth antennas in every two adjacent vectors in B have the same phase difference, both of which are mA.
- B is the set of precoding matrices
- v n is the nth vector in the set of precoding matrices
- the amplitude a m , n is a real number.
- the parameter for determining the precoding matrix set includes K second phase values, K third phase values, and amplitudes of elements (m, n) in the precoding matrix subset a mn , K
- the number of vectors in the k precoding matrix subsets may be obtained by using the first parameter indication information or an implicit manner, and the others are fixed;
- K second phase values and K may be obtained by first parameter indication information or implicit manner
- the third phase value, the others are fixed.
- the parameter is used to determine the precoding matrix set, including:
- phase value k Using a phase value k , a phase value k , an amplitude a mn , a quantity N k , and a quantity M, determining a vector constituting the subset of the precoding matrix; wherein the phase value k is two adjacent vectors in the vector of the precoding matrix subset The minimum value of the phase difference of the antenna; the phase value is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set;
- a precoding matrix subset is determined for each set of second phase values and third phase values, respectively, to form a precoding matrix set.
- B denotes a set of precoding matrices
- the vector constituting B is B 2 ... ⁇ ⁇ ]
- the vector constituting B k is k ... ", wherein different elements of each vector correspond to different antennas, for example, v k o, n
- ⁇ corresponds to the weight of the 0th antenna
- ⁇ corresponds to the weight of the 1st antenna
- the phase difference between two adjacent antennas is 2 , k , which is the smallest phase difference between two adjacent antennas in all vectors, and the phase difference between two adjacent antennas of v is the adjacent two antennas in all vectors.
- the phase difference is the largest.
- B is the precoding matrix set
- B k is the kth precoding matrix subset
- v n k is the nth vector in the kth precoding matrix subset
- a mn is the element (m, The magnitude of n), and is a real number
- the phase difference between two adjacent antennas in the nth vector of the kth precoding matrix subset is %, k + n A k ; two phases in the kth precoding matrix subset
- the phase difference between the two mth antennas in the adjacent vector is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k .
- At least two of the K second phase values 2k may be different.
- At least two of the number N k of K precoding matrix subset vectors may be different.
- the parameter for determining the precoding matrix set includes K second phase values, K third phase values, K phase intervals, and elements (m, n) in the precoding matrix subset.
- the amplitude a mn at least one of the number M of elements in each vector in the precoding matrix subset, k represents the kth second phase value, represents the kth third phase value, and A k represents the kth phase interval , l ⁇ k ⁇ K, and K second phase values, K third phase values, K phase intervals, amplitudes of elements (m, n) in the precoding matrix subset a m , n , precoding matrix
- the number M of elements in each set is preset except for the parameter;
- K second phase values, K third phase values, and K phase intervals may be obtained by first parameter indication information or implicitly, and the others are fixed;
- K phase intervals may be obtained by the first parameter indication information or implicitly, and the others are fixed;
- K second phase values and K third phase values may be obtained by first parameter indication information or implicitly, and the others are fixed.
- the parameter is used to determine the precoding matrix set, including:
- the method comprises:
- phase value k is two adjacent vectors in the vector of the precoding matrix subset
- the minimum value of the phase difference of the antenna is the maximum value of the phase difference of two adjacent antennas in the vector of the precoding matrix set
- the phase of two adjacent antennas in the nth vector of the kth precoding matrix subset The difference is %, k + nA k
- the phase difference of two mth antennas in two adjacent vectors in the k-th precoding matrix subset is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k
- N k is the number of vectors in the k-th precoding matrix subset, J_ A ⁇ k - ⁇ k
- B denotes a set of precoding matrices
- the vector constituting B is [AB 2 ... ⁇ ⁇ ]
- the vector constituting B k is [ 1 ⁇ 4 k ... ⁇ " wherein different elements of each vector correspond to different antennas, for example, ⁇ , ⁇
- ⁇ corresponds to the addition of the 1st antenna
- the weight, V corresponds to the weight of the M-1 antenna.
- the phase difference between two adjacent antennas of the nth vector v k n is 2k + nA k , v k .
- the phase difference of the adjacent two antennas is k , which is the smallest phase difference between two adjacent antennas in all vectors
- the phase difference between two adjacent antennas of ⁇ -i is k , which is the phase of all vectors.
- the phase difference between the two adjacent antennas is the largest.
- the two mth antennas in every two adjacent vectors in B k have the same phase difference, both of which are mA k .
- the forms of the vectors constituting the precoding matrix set and the kth precoding matrix subset are as follows:
- B is the precoding matrix set
- B k is the kth precoding matrix subset
- v n k is the kth precoding
- the nth vector in the matrix subset, a mn is the magnitude of the element (m, n), and is a real number.
- W W1*W2; W1 mainly reflects the long-term characteristics of the channel.
- Y 1 k ek,e 2 ,---,eA, Y 2 k e ]3 ⁇ 4,3 ⁇ 4, ⁇ , 3 ⁇ 4 1 that is, for W2
- Embodiment 8 of the present invention at least two of the K second phase values 2 , k and may be different.
- the parameter for determining the precoding matrix set includes a fourth phase value ⁇ 4 , a phase interval ⁇ , an amplitude a m , n of the element (m, n) in the precoding matrix set, and precoding
- the number N of vectors in the set of matrices, at least one of the number M of elements in each vector in the set of precoding matrices, and the phase interval ⁇ of the fourth phase value, the magnitude of the elements (m, n) in the set of precoding matrices a mn , the number N of vectors in the precoding matrix set, and the number M of elements in each vector in the precoding matrix set is preset except for the parameter;
- ⁇ may be obtained by using the first parameter indication information or an implicit manner, and the others are all fixed; or, the first parameter indication information or the implicit manner may be used to obtain other fixed determinations, and the parameter is used to determine the pre-determination.
- a collection of coding matrices including:
- the fourth phase value is a minimum value of phase differences of two adjacent antennas in the vector of the precoding matrix set
- phase difference between two adjacent antennas in the nth vector in the precoding matrix set is %+ ⁇ ;
- the phase difference between two mth antennas in two adjacent vectors in the matrix set is mA, 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N.
- B denotes a precoding matrix set, and the vector constituting B is [v. Vl ... v N —”, wherein different elements of each vector correspond to different antennas, for example, v n v 0 .
- v ln corresponds to the weight of the 1st antenna
- v M — ln corresponds to the weighted value of the M-1th antenna.
- the phase difference between two adjacent antennas of the nth vector v n is V.
- the phase difference of the adjacent two antennas is that the phase difference between two adjacent antennas in all vectors is the smallest, and the phase difference between two adjacent antennas of v N — i is %+( ⁇ -1) ⁇ , The phase difference between two adjacent antennas in all vectors is the largest.
- the two mth antennas in every two adjacent vectors in ⁇ have the same phase difference, both mA.
- B is a set of precoding matrices
- ⁇ ⁇ is the nth vector in the set of precoding matrices
- the amplitude a mn is a real number.
- the parameter for determining the precoding matrix set includes K fourth phase values, K phase intervals, and an amplitude of the elements (m, n) in the precoding matrix subset a mn , K pre-
- the number of vectors in the subset of the coding matrix, at least one of the number M of elements in each vector in the precoding matrix subset, k represents the kth fourth phase value
- a k represents the kth phase interval
- N k represents the The number of vectors in the k precoding matrix subsets, l ⁇ k ⁇ K
- the number of vectors in the subset of the coding matrix, the number M of elements in each vector in the precoding matrix subset is preset except for the parameter; for example, K may be obtained by the first parameter indication information or implicitly Fourth phase value, K phase intervals
- K phase intervals may be obtained by the first parameter indication information or implicitly, and the others are fixed;
- K fourth phase values may be obtained by first parameter indication information or implicitly, all other being fixed.
- the parameter is used to determine the precoding matrix set, including:
- determining a corresponding k-th precoding matrix subset for k and A k including:
- phase value k is two of the vectors of the precoding matrix subset
- the minimum value of the phase difference of adjacent antennas; the phase difference of two adjacent antennas in the nth vector of the kth precoding matrix subset is 4 , k + n A k ; two of the kth precoding matrix subsets
- the phase difference between two mth antennas in the adjacent vector is mA k , 0 ⁇ m ⁇ M, 0 ⁇ n ⁇ N k ;
- a subset of precoding matrices determined for each phase interval is formed into a set of precoding matrices.
- B denotes a precoding matrix set, and the vector constituting B is [AB 2 ... ⁇ ⁇ ], a vector constituting B k For k 1 ⁇ 4 k ... ⁇ ", where different elements of each vector correspond to different antennas, for example,
- ⁇ corresponds to the weight of the 0th antenna
- ⁇ corresponds to the addition of the 1st antenna
- the weight, V corresponds to the weight of the M-1 antenna.
- the two mth antennas in every two adjacent vectors in B k have the same phase difference, both of which are mA k .
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KR1020167021544A KR101895394B1 (ko) | 2014-01-09 | 2014-01-09 | 프리코딩 행렬 집합 결정 방법 및 장치, 파라미터 지시 정보 송신 방법 및 장치 |
CN201910596016.6A CN110380768A (zh) | 2014-01-09 | 2014-01-09 | 预编码矩阵集合确定方法、参数指示信息发送方法及装置 |
ES14877742T ES2730298T3 (es) | 2014-01-09 | 2014-01-09 | Método de determinación de conjunto de matriz de precodificación, método y aparato de envío de información de indicación de parámetro. |
KR1020187024861A KR20180100256A (ko) | 2014-01-09 | 2014-01-09 | 프리코딩 행렬 집합 결정 방법 및 장치, 파라미터 지시 정보 송신 방법 및 장치 |
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US16/059,948 US10469143B2 (en) | 2014-01-09 | 2018-08-09 | Precoding matrix set determining method and apparatus, and parameter indication information sending method and apparatus |
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US10931339B2 (en) | 2017-08-11 | 2021-02-23 | China Academy Of Telecommunications Technology | Method and device for determining uplink transmission codebook |
WO2019047946A1 (zh) * | 2017-09-10 | 2019-03-14 | 华为技术有限公司 | 一种码本子集限制的方法 |
CN109495148A (zh) * | 2017-09-10 | 2019-03-19 | 华为技术有限公司 | 一种码本子集限制的方法 |
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EP3086483A1 (en) | 2016-10-26 |
ES2730298T3 (es) | 2019-11-11 |
US10469143B2 (en) | 2019-11-05 |
KR20160105976A (ko) | 2016-09-08 |
KR20180100256A (ko) | 2018-09-07 |
AU2014377267B2 (en) | 2018-01-25 |
EP3086483A4 (en) | 2016-12-28 |
US20200044703A1 (en) | 2020-02-06 |
EP3086483B1 (en) | 2019-04-10 |
CN110365381A (zh) | 2019-10-22 |
US20160323025A1 (en) | 2016-11-03 |
CN110380768A (zh) | 2019-10-25 |
US20180351617A1 (en) | 2018-12-06 |
KR101895394B1 (ko) | 2018-09-05 |
US10063299B2 (en) | 2018-08-28 |
CN105164933B (zh) | 2019-07-09 |
EP3579451A1 (en) | 2019-12-11 |
CN105164933A (zh) | 2015-12-16 |
AU2014377267A1 (en) | 2016-08-04 |
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