Patent ID: 8588711

Claim:
A transmission apparatus comprising: an analog digital converter configured to perform sampling at a sampling frequency on a demodulated signal obtained by demodulating a part of an output signal, converting the demodulated signal into a digital signal, the output signal being produced by amplifying a modulated signal of a baseband signal including a plurality of signals having frequencies separated from each other and the sampling frequency being lower than a frequency of a given intermodulation distortion component, and separating a frequency band occupied by an aliasing component of the given intermodulation distortion component from at least one of a frequency band occupied by the baseband signal and a frequency band occupied by an aliasing component of an intermodulation distortion component other than the given intermodulation distortion component; a detection circuit configured to detect the aliasing component of the given intermodulation distortion component produced by the converting of the analog digital converter; and a distortion compensation circuit configured to compensate an input signal to be modulated for the given intermodulation distortion component in accordance with the detected aliasing component.