Radio communication appratus and method having more channel capacity and less feedback information

The radio communication apparatus and method having the maximum channel capacity is described. Transmission of this device is allocated by using the feedback information restored for each of the transmission power of the base band signal containing the information signal from the outside from the feedback signal, sikimyeo modulating the baseband signals with the allocated transmission power, the modulation transmission by converting the baseband signal into a radio frequency signal, the receiver estimates a channel response experienced during the one to transmit the radio frequency signals received, and by using the estimated channel response, and restores information signals from the radio-frequency signal and information on the transmission power to be allocated calculated by using the channel response estimate is characterized in that the transmission as the feedback signal to a radio transmitter. Therefore, because the feedback information only for the transmission power to be assigned to the first transmission antenna, instead of the channel response information, while still minimizing the amount of the feedback signal it is possible to maximize the channel capacity, and so do not need to decoupling the hardware size reduction by an effect that can have a small size and reduce the manufacturing cost.