A selection method for multi-input and multi-output space multiplexing pre-coding matrix

[0022] The present invention intends to provide a method for selecting a multi-input multi-output spatial multiplexing precoding matrix, which is used in a wireless communication system using closed-loop MIMO precoding method to improve communication performance by using a limited number of feedback bits, which mainly includes the following steps :

[0023] (101) Based on the principle of maximizing the two-norm minimum distance of the projection of the subspace, a set of precoding codebooks known to both the transmitter and the receiver are defined in advance;

[0024] (102) Store the precoding codebook in the transmitter and receiver;

[0025] (103) The receiver obtains the current channel information according to the pilot estimation, including the channel state information and the signal-to-noise ratio information of the current channel, and minimizes or maximizes the capacity or minimizes the determinant of the mean square error matrix. In principle, select a precoding matrix fr