Beamforming method for sdm/mimo system

Beam forming method of the present invention is a communication system comprised of a plurality of receivers for receiving and distinguishing a plurality of using transmit antenna transmitter and the signal for transmitting a signal to spatially differentiate between users, to a single antenna receiver consider that if the use of multiple antennas used will be in accordance with the channel information received from the respective nodes determine the beamforming weights and transmit beamforming weights to multiplying the transmission signal. The beam forming method of the present invention can improve the system performance, reducing the interference between each user to minimize the transmission power or minimize the average value of the interference power due to channel estimation error.