Patent ID: 8284859

Claim:
A method of transmission implemented in a mobile terminal, comprising: generating precoding information in order for a remote transmitter to select a precoding matrix based on a codebook which has entries in the following form 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 the remote transmitter has M antennas, e 1 N =[1,0, . . . ,0] T εC N , C N being N-dimensional complex space, 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 ; and providing the precoding information to the remote transmitter.