CSI feedback and codebook configuration signaling configuration method and device
A signaling and selective configuration technology, which is applied in the direction of signaling, wireless communication, and transmission modification based on link quality, can solve the problem of inflexible high-level signaling configuration, and achieve flexible high-level signaling and flexible configuration , Solve the effect of inflexible configuration
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Embodiment 1
[0143] Example 1: Example of Class A
[0144] System description: In this communication system, including base stations and terminals, they jointly agree to have a set of codebooks CB. The topology of the base station antennas is generally also a planar array, that is, there are antennas in two dimensions. Each of CB can be written in the form of W=W1*W2, and each beam in the code word W1 has a formal 2-dimensional form Where v m And u n Are the discrete Fourier vectors of the first dimension and the second dimension, m=1, 2,...,N 11 ,n=1,2,…,N 12 . Means v m And u n The Kronecker product of W1, the codebook of the first dimension of W1 is represented by PMI11, and the codebook of the second dimension is represented by PMI12. For each index of PMI11 and PMI12 mentioned above, there are M1 W2 codewords, and each W2 codeword is used to select a 2-dimensional beam from W1 And for Co-phasing with different polarization directions, the corresponding codeword index is PMI2. Since th...
Embodiment 2
[0162] The system description part is the same as that of embodiment 1, so it will not be repeated here.
[0163] Implementation:
[0164] (1) The communication node obtains the channel rank RI, and divides the RI into two groups Set1 {1,2,3,4}, Set2 {5,5,...,N}.
[0165] Wherein, when the communication node is a base station, the channel rank RI is obtained through the uplink channel reciprocity or the RI is obtained through the uplink feedback of the terminal. When the communication node is a terminal, the channel rank RI is obtained through downlink channel information.
[0166] Wherein, the channel rank RI grouping method can be standardized and defined, a default grouping method for both the base station and the user, or the number of ports in the first dimension N1, the number of ports in the second dimension N2, and the first dimension oversampling factor O1 , The second dimension oversampling factor O2 is determined. For example, when N1=4, N2=2, O1=8, O2=4, Set1 is {1,2,3},...
Embodiment 3
[0178] The system description part is the same as that of embodiment 1, so it will not be repeated here.
[0179] Implementation:
[0180] (1) The communication node obtains the channel rank RI, and divides the RI into two groups, Set1 is {1,2}, Set2 is {3,4}, and Set3 is {5,6,...,N}.
[0181] Wherein, when the communication node is a base station, the channel rank RI is obtained through the uplink channel reciprocity or the RI is obtained through the uplink feedback of the terminal. When the communication node is a terminal, the channel rank RI is obtained through downlink channel information.
[0182] Wherein, the channel rank RI grouping method can be standardized and defined, a default grouping method for both the base station and the user, or the number of ports in the first dimension N1, the number of ports in the second dimension N2, and the first dimension oversampling factor O1 , The second dimension oversampling factor O2 is determined. For example, when N1=4, N2=2, O1=8, ...
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