Patent ID: 8254488
Filing Date: 2012-08-28
Classification: H04B

Abstract:
1. A method implemented in a mobile terminal, comprising: generating feedback information for transmission in order for a remote transmitter to select a precoding matrix from a codebook for M transmit antennas, the codebook having entries in the following form where e 1 N =[1, 0, . . . , 0] T εC N , C N being N-dimensional complex space, ν a denotes a column vector, HH(ν k −e 1 l ) is a rotation matrix that transforms vector ν k to the unit vector e 1 l and ν a is selected from a set V a where V 1 ={ν 1 1 εC M } i=1 N , V 2 ={e 1 M−1 }, V 3 ={e 1 M−2 }, . . . .