Patent ID: 8284861

Claim:
A method for transmission implemented in a mobile terminal, comprising: generating a feedback information for transmission in order for a remote transmitter to select a precoding matrix based on a codebook generated by picking one or more columns of a matrix with the following structure A ⁡ ( v 1 , v 2 , v 3 , … ) = ⁢ ⁢ [ v 1 , HH ⁡ ( v 1 - e 1 M ) ⁡ [ 0 v 2 ] , HH ⁡ ( v 1 - e 1 M ) ⁡ [ 0 HH ⁡ ( v 2 - e 1 M - 1 ) ⁡ [ 0 v 3 ] ] ] , … where being 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, and HH(v k −e 1 l ) is a rotation matrix that transforms vector v k to the unit vector e 1 l .