In a cellular wireless communication system with plural antenna base stations, signals have been basically transmitted using two antennas among plural antennas, and thus power has been concentrated in specific antennas. The present invention controls the transmission power of each antenna so as not to increase the transmission power of specific antennas by effectively using plural antennas and frequency bands. A frequency band is divided into plural sub-bands, and antennas used for transmission are spread to the sub-bands. In each sub-band, power is not allocated to an antenna that is not used for transmission. As a result, the transmission power of each antenna can be balanced, and power can be prevented from being concentrated in specific antennas.