Patent ID: 8384477

Claim:
A distortion compensating apparatus that compensates signal distortion caused by an amplifier, comprising: a distortion compensating process unit that using a distortion compensation coefficient, compensates distortion of an input signal; a memory unit storing therein the distortion compensation coefficient; and a first address generating unit that generates a first address that is based on electrical power of the input signal and is for acquiring the distortion compensation coefficient from the memory unit; a normalizing factor determining unit that determines a normalizing factor based on the electrical power of the input signal; a second address generating unit that generates a second address that is based on any one among the electrical power, phase of the input signal and amplitude of the input signal, is for acquiring the distortion compensation coefficient from the memory unit, and is normalized with the normalizing factor, wherein the distortion compensating process unit acquires the distortion compensation coefficient from the memory unit, based on the first and the second addresses to compensate the distortion.