Patent ID: 8300727

Claim:
A method of recommending a pre-coding vector in a terminal in a multi-user MIMO system, the method comprising: (a) calculating a channel response matrix, using a plurality of received signals, wherein each element of the channel response matrix describes a channel status response of a channel between the terminal and a corresponding base station; (b) calculating a plurality of channel status informations, using a predefined pre-coding codebook and the channel response matrix, wherein each of the plurality of channel status informations corresponds to a pre-coding vector in the predefined pre-coding codebook; (c) selecting a plurality of pre-coding vectors from the predefined pre-coding codebook as a recommended pre-coding codebook, using a correlation coefficient between the pre-coding vectors of the predefined pre-coding codebook and the plurality of channel status informations; and (d) generating a feedback signal based on the recommended pre-coding codebook and a plurality of corresponding channel status informations, and transmitting the feedback signal to the base station, wherein each of the plurality of corresponding channel status informations corresponds to a recommended pre-coding vector in the recommended pre-coding codebook.