Patent ID: 8913682
Filing Date: 2014-12-16
Classification: H04B

Abstract:
1. A mobile station configured to receive transmissions from a two-dimensional array of antennas at a base station, wherein the array comprises a plurality of groups of antennas, the mobile station comprising a main processor, the main processor configured: to receive from the base station a first configuration for a first set of reference signals and a second configuration for a second set of reference signals; to estimate a first channel state with the first set of reference signals and a second channel state with the second set of reference signals; to determine a co-phasing scalar component for each of the groups of antennas based on the first channel state; to generate a matrix X comprising a plurality of column vectors selected from a codebook based on the second channel state, wherein each of the column vectors quantizes channel coefficients for one of the groups of antennas; to generate a matrix P to generate a matrix P to transmit to the base station a first precoding matrix information corresponding to the matrix P to transmit to the base station a channel quality information (CQI), wherein the CQI is derived with a precoding matrix P defined by P=P