Patent ID: 7623587

Claim:
A method for communicating a signal in a system for transmitting a symbol for which a space-time multiplexing (STTD) and a beamforming have been performed by a transmitting end, and having more than four transmit antennas, the method comprising: calculating a signal to interference noise ratio (SINR) with respect to transmit antenna pairs; determining two pairs of transmit antennas at least one of which has a greatest SINR among the transmit antenna pairs; calculating an eigenvector of a channel matrix with respect to the determined two pairs of transmit antennas; feeding back information on the determined two pairs of transmit antennas and the eigenvector to the transmitting end; and receiving the symbol according to the determined two pairs of transmit antennas using the eigenvector as a weight vector, wherein the channel matrix comprises a correlation value between the more than four transmit antennas, a correlation value between receive antennas, and a channel value in a radio channel circumstance.