Patent ID: 9030949
Filing Date: 2015-05-12
Classification: H04B,H04L

Abstract:
1. A method for operating a Mobile Station (MS) in a wireless communication system, the method comprising: receiving, by the MS, Precoding Matrix Index (PMI) subset information from a Base Station (BS), the PMI subset information, received by the MS from the BS, including at least one PMI that is restricted and at least one PMI that is recommend from among a plurality of PMIs; determining, by the MS, downlink channel quality of the BS; determining, by the MS, a PMI based on the PMI subset information and the determined downlink channel quality of the BS; and transmitting, by the MS, the determined PMI to the BS, wherein each one of the plurality of PMIs respectively indicates a precoding matrix from among a plurality of precoding matrices, wherein the at least one PMI that is restricted and the at least on PMI that is recommended are respectively determined based on a probability of being a worst PMI and a probability of being a best PMI, and wherein the probability of being the worst PMI and the probability of being the best PMI are determined based on at least one of an antenna configuration of the BS and an antenna spacing.