Patent ID: 8483306
Filing Date: 2013-07-09
Classification: H04B,H04L

Abstract:
1. A pre-coding method, applied to a Multiple-Input Multiple-Output (MIMO) system with eight antennas, and comprising: a transmitting end and a receiving end storing information of a pre-coding codebook together, the receiving end selecting a codeword from the pre-coding codebook according to an estimated channel matrix and feeding back a serial number of the codeword to the transmitting end, and the transmitting end finding out the codeword according to the serial number and pre-coding, by using the codeword, a symbol block sent to the receiving end; wherein, at least eight codeword vectors or column vectors in at least eight codeword matrixes in the pre-coding codebook are obtained based on 8-dimensional vectors selected from the following 8-dimensional vector set: wherein, u u q0=(1+j)/√{square root over (2)}; q1=(−1+j)/√{square root over (2)}; q2=(−1−j)/√{square root over (2)}; q3=(1−j)/ √{square root over (2)}; s(n)is an element in vectors, n=1,2,3,4, and s=[s(1) s(2) s(3) s(4)]=[1 j q0 q1].