| 摘要 |
To optimize the selection of pre-coding vectors in a multi-user MIMO system, the present invention provides a method for selecting pre-coding vectors in a base station, comprising the steps of: transmitting a plurality of pilot signals without being precoded to the plurality of terminals; receiving a plurality of feedback signals from the plurality of terminals, wherein at least one feedback signal includes a plurality of recommended pre-coding vector information and a plurality of channel status information, and each of the channel status information corresponds to a recommended pre-coding vector information; generate a pre-coding codebook based on the plurality feedback signals, wherein at least one pre-coding vector in the pre-coding codebook is determined based on a correlation coefficient between at least two recommended pre-coding vectors; and performing a transmission operation using the pre-coding codebook. Through considering the correlation among pre-coding vectors and different channel status information corresponding to different pre-coding vectors, be used to extend the selection range of pre-coding vectors and improve the total transmission rate of the whole system and system capacity.
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