EFFICIENT FEEDBACK TRANSMISSION METHOD IN MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM AND DEVICE FOR SAME

摘要

The present invention relates to a method for feeding back channel state information with respect to downlink transmission of a terminal in a wireless communication system supporting multiple antennas. Particularly, the method comprises the steps of measuring a channel with respect to downlink transmission; and transmitting a precoding matrix indicator (PMI) to which a precoding matrix for multiple antennas is applied, on the basis of the channel measuring result, wherein the multiple antennas are defined as a group of N antenna (N>0, N is an integer), and the precoding matrix for multiple antennas is determined by a precoding matrix for the group of N antennas and a phase coefficient matrix with respect to the precoding matrix for the group of N antennas.

主权项

1. A method for feeding back channel state information with respect to downlink transmission by a user equipment in a wireless communication system supporting multiple antennas, the method comprising the steps of:
performing channel measurement for the downlink transmission; and transmitting a precoding matrix indicator (PMI) to which precoding matrixes for multiple antennas are applied, on the basis of the result of the channel measurement, wherein the multiple antennas are defined by N number of antenna groups (N>0, N is an integer), and the precoding matrixes for multiple antennas are determined by precoding matrixes for the N number of antenna groups and phase coefficient matrixes corresponding to the precoding matrix for the N number of antenna groups.