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Nonlinear distortion compensating device

  • US 20030228856A1
  • Filed: 04/09/2003
  • Published: 12/11/2003
  • Est. Priority Date: 04/10/2002
  • Status: Active Grant
First Claim
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1. A nonlinear distortion compensating device comprising:

  • a distortion compensating calculator for receiving an input signal and a distortion compensating coefficient, and outputting the input signal with phase distortion and amplitude distortion compensated;

    a demodulator for demodulating the input signal;

    a modulator for modulating again the demodulated signal; and

    a distortion estimating updater for feeding back parts of the signal output from the distortion compensating calculator, estimating a distortion amount from the fed back signal and the signal re-modulated by the modulator, and updating the distortion compensating coefficient stored in the calculator.

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