MOBILE STATION DEVICE, COMMUNICATION METHOD, AND COMPUTER PROGRAM

摘要

A mobile station device, a communication method, and a computer program in which effective beam-forming can be performed without an increase in power consumption are provided. The mobile station device: calculates a channel capacity of a representative precoding matrix index (PMI) for each PMI group; sorts the PMI groups in the sequence of the PMI channel capacity; compares the previous sort sequence and the current sort sequence to thereby determine a PMI group for which a channel capacity of a PMI other than the representative PMI is calculated; calculates the channel capacity of a PMI other than the representative PMI, from among the PMIs in the PMI group that has been determined; and selects as a PMI estimation value the PMI for which the largest channel capacity has been calculated.