Patent ID: 6737918
Filing Date: 2004-05-18
Classification: H03F,H04B,H04L

Abstract:
A distortion compensation apparatus which compensates for a distortion characteristic of an amplifier, comprising:an adjacent channel leakage power extraction unit extracting at least adjacent channel leakage power of a main channel signal to be processed in a distortion compensating process from an output signal of the amplifier; a distortion compensation coefficient computation unit converting an amplitude value and a phase value of a distortion compensation coefficient into respective gene types, and obtaining the distortion compensation coefficient based on a genetic algorithm using the adjacent channel leakage power value or the adjacent channel leakage power ratio obtained from the adjacent channel leakage power value as an evaluation function; and a distortion compensation coefficient application unit applying the distortion compensation coefficient computed by said distortion compensation coefficient computation unit as an input signal of the amplifier.