Patent ID: 8565342

Claim:
A power amplification apparatus comprising: an inverse fast Fourier transform section configured to perform an inverse fast Fourier transformation on data allocated to a plurality of sub-carriers; a parallel/serial conversion section configured to output time-domain data received in parallel from the inverse fast Fourier transform section as a time-domain analog signal including a real-part time-domain analog signal and an imaginary-part time-domain analog signal; a power amplifier configured to perform a power amplification on the time-domain analog signal, wherein a saturation output level of the power amplifier is adjustable in accordance with a switching signal; a real-part comparator configured to compare an amplitude of a signal in each time slot of the real-part time-domain analog signal with a predetermined threshold, and an imaginary-part comparator configured to compare an amplitude of a signal in each time slot of the imaginary-part time-domain analog signal with the predetermined threshold, wherein the saturation output level of the power amplifier is switched based on outputs of the real-part comparator and the imaginary-part comparator.