In a frequency control single carrier system, a frequency diversity gain is obtained in transmission diversity with one symbol. A wireless transmission apparatus, which has a plurality of antennas and performs radio transmission in a single carrier communication system, comprises a DFT unit (4) time-frequency converting a plurality of input time-domain signals to output a plurality of frequency-domain signals, a spectrum encoding unit(5) encoding each of the output frequency-domain signals, and a transmission unit (6-1 to 11-2) frequency-time converting the encoded frequency-domain signal to radio-transmit a time-domain signal using at least one antenna.