An transmission apparatus includes a pseudo data addition section
configured to add pseudo data into transmission data for a free
subcarrier of a radio frequency, an OFDM modulator subjecting the
transmission data added with the pseudo data to OFDM modulation, a power
amplifier amplifying power of a transmission signal of the radio
frequency, the transmission signal based on an OFDM signal subjected to
the OFDM modulation, an antenna radiating the amplified transmission
signal by using the radio frequency; and a distortion compensation
circuit compensating for a distortion characteristic of the power
amplifier by correcting the OFDM signal with a distortion compensation
coefficient accumulated corresponding to the power value of the OFDM
signal, outputting the corrected signal for the power amplifier, and
monitoring the output of the power amplifier to update the distortion
compensation coefficient.