Patent ID: 8781021

Claim:
A method for pre-coding, comprising: calculating a pre-coding matrix for each transmitting end according to a sum of mean square errors of data vectors to be transmitted by each transmitting end; and using the pre-coding matrix to pre-code data to be transmitted by each transmitting end, wherein the calculating of the pre-coding matrix comprises: calculating the pre-coding matrix for each transmitting end according to a minimum value of the sum of mean square errors of data vectors to be transmitted by each transmitting end; or calculating the pre-coding matrix for each transmitting end according to a minimum value of a product of the sum of mean square errors of data vectors to be transmitted by each transmitting end and a weight factor; or calculating the pre-coding matrix for each transmitting end according to a minimum value of a sum of or a difference between the sum of mean square errors of data vectors to be transmitted by each transmitting end and a bias parameter, the sum of mean square errors of data vectors including an estimated error for a channel coefficient matrix.