Patent ID: 7639755
Filing Date: 2009-12-29
Classification: H03F

Abstract:
1. A distortion compensating apparatus having a distortion compensation coefficient calculating unit, to which is input a difference signal between a reference signal that is a transmit signal and a feedback signal, for calculating a distortion compensation coefficient from an adaptive algorithm in such a manner that said difference signal will be diminished, a distortion compensation coefficient memory the stored content of which is updated by the distortion compensation coefficient calculated, and a distortion compensator for applying distortion compensation to the transmit signal based upon said distortion compensation coefficient, comprising: a phase-difference detector for detecting a phase difference between the reference signal and the feedback signal; a phase correcting unit for correcting said phase difference; and a controller for exercising control so as to alternately and repeatedly generate a phase correcting interval and a distortion compensation coefficient updating interval, correct said phase difference in said phase correcting interval and update said distortion compensation coefficient in said distortion compensation coefficient updating interval.