Patent ID: 8509338
Filing Date: 2013-08-13
Classification: H04B,H04L

Abstract:
1. A method for a wireless communication device to send a precoder matrix information to a base station, the method comprising: the wireless communication device sending a first representation of a first matrix chosen from a first codebook, wherein the first matrix has at least two column vectors; the wireless communication device sending a second representation of a second matrix chosen from a second codebook; wherein the first representation and the second representation together convey a precoder matrix of one or more vectors associated with one or more spatial layers, the precoder matrix comprises a first sub-precoder matrix including a first set of weights on a first subset of transmit antennas of the base station, and a second sub-precoder matrix including a second set of weights on a second subset of transmit antennas of the base station, wherein the first and the second subsets of transmit antennas of the base station are non-overlapping, wherein the first sub-precoder matrix is one or more column vectors of the first matrix corresponding to the first representation, multiplied by one or more entries of the second matrix corresponding to the second representation, and the second sub-precoder matrix is one or more column vectors of the first matrix corresponding to the first representation, multiplied by one or more entries of the second matrix corresponding to the second representation.