Method, system and device for obtaining descending channel information
A channel information and channel technology, which is applied in the field of obtaining downlink channel information, can solve the problems of large uplink feedback signaling overhead, codebook quantization error affecting precoding performance, and limited number of codebooks, so as to save signaling overhead and reduce processing Complexity, the effect of avoiding the loss of precision
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[0042]The embodiment of the present invention provides a method for obtaining downlink channel information. While ensuring good channel estimation performance, and without increasing the overhead of additional uplink feedback signaling, the transmitter can obtain complete downlink channel information, thereby It is conducive to pre-equalizing or pre-coding the signal at the transmitting end.
[0043] In the embodiment of the present invention, it is assumed that the number of transmitting antennas at the transmitting end is M, the number of receiving antennas at the transmitting end is N, the number of transmitting antennas at the receiving end is m, and the number of receiving antennas at the receiving end is n. Among them, the number of subcarriers occupied by the downlink pilot signal and uplink pilot of each antenna may be equal or different. However, in the embodiment of the present invention, the number of subcarriers occupied by the downlink pilot signal and uplink pilot of...
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