Transmitter and method for subcarrier scaling in mobile station of ofdma

A transmitter and method for subcarrier scaling in mobile station of OFDMA are provided to adjust the size of subcarrier according to the number of sub-carrier. The transreceiver of the OFDMA terminal are comprised of a modem unit and a radio frequency process part(110). The modem unit comprises a frequency domain processor(120), a controller(130), a sub carrier assignment part(140a, 140b), a size control unit(150), a transmission unit(160) and a receiver(170). The radio frequency process part adjusts the electricity of the transmission signal to a low lever and amplifies it. The sub carrier assignment part(140a) assigns a sub carrier wave to the signal to be transmitted. The sub carrier assignment part(140b) assigns the sub carrier wave to the signal received from the receiver. The size control unit increases the electricity of the signal to be transmitted according to the scaling control value. The transmission unit transmits the signal transformed as analog signal to the radio frequency process part.