Patent ID: 8971437
Filing Date: 2015-03-03
Classification: H04B,H04L

Abstract:
1. A method comprising: receiving, at a wireless terminal, a set of channel state information reference signals; determining, by the wireless terminal, a precoding matrix based on the received set of channel state information reference signals, where the precoding matrix has a representation in terms of three components, where the first component of the three components is determined from a first set of vectors, where the first set of vectors are determined by a first codebook index, where the second component of the three components is determined from a first set of parameters, where the first set of parameters are determined by a second codebook index, and where the third component of the three components is determined from a second set of parameters, where the second set of parameters is a set of unit-magnitude scalars; and transmitting, by the wireless terminal, a representation of at least one of the first component, the second component, and the third component.