Patent ID: 8971434
Filing Date: 2015-03-03
Classification: H04B

Abstract:
1. A method of generating a first codebook A for M′ transmit antenna ports, of multiple-antenna communication in a wireless communication system, comprising at least a first precoding matrix a p , said first precoding matrix a p having M′ rows and R′ columns, where M′ and R′ are natural numbers and comprising at least a first and second sub-matrix having M rows and R 1 columns, wherein a first sub-matrix is located at rows m=1 . . . M and columns r=1,2, . . . R 1 of a first precoding matrix a p , and a second sub-matrix is located at rows m=M+1, M+2, . . .2×M and columns r=1,2, . . . R 1 of a first precoding matrix a p ; comprising: selecting, by a device in the wireless communication system, at least a second b obtaining, by the device in the wireless communication system, said first and second sub-matrices based on said second b wherein at least one of said second and third precoding matrices is multiplied by a complex scalar or matrix in the process of obtaining said first and second sub-matrices; wherein the device comprises a hardware processor.