Patent ID: 9270260
Filing Date: 2016-02-23
CPC Classification: H03K

Claim Text:
1. A distortion compensation device for compensating a distortion component generated in a nonlinear circuit having a nonlinear input-output characteristic, comprising: a predistorter configured to convert an input signal into an inverse characteristic signal by using a compensation coefficient so that an estimation value of an inverse characteristic to the nonlinear input-output characteristic is given to the input signal; an estimator configured to generate the compensation coefficient based on the input signal, the inverse characteristic signal and an output signal of the nonlinear circuit; wherein the estimator includes: a reference signal generation module configured to generate a reference signal including a difference between the inverse characteristic signal and a signal of the distortion component, based on the input signal, the inverse characteristic signal and the output signal of the nonlinear circuit; and an estimation computing module configured to compute the compensation coefficient based on the input signal and the reference signal.