Patent ID: 7786934

Claim:
A method of transmitting a signal in a transmitting end of a multi-antenna system, the method comprising: receiving, by a beam-forming matrix calculator, channel information for all Receive (Rx) antennas; calculating, by the beam-forming calculator, a beam-forming matrix that maximizes a Signal-to-Interference plus Noise Ratio (SINR) for each Rx antenna by using the received channel information; calculating, by a Dirty Paper Coding (DPC) unit, an integer value which is in proportion to an interference signal for each Rx antenna by using the received channel information and the calculated beam-forming matrix, and performing Dirty Paper Coding (DPC) on a Transmit (Tx) signal by using the calculated integer value; and performing beam-forming, by a beam-forming unit, by multiplying the Tx signal that has undergone the DPC by the calculated beam-forming matrix.