Patent ID: 8259842
Filing Date: 2012-09-04
Classification: H04B

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