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System and method for linear distortion estimation by way of equalizer coefficients

  • US 7,602,867 B2
  • Filed: 02/01/2005
  • Issued: 10/13/2009
  • Est. Priority Date: 08/17/2004
  • Status: Active Grant
First Claim
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1. A method for estimating channel distortion in a communications system channel including an adaptive equalizer, comprising:

  • determining one or more adaptive filter coefficients associated with a signal by the adaptive equalizer;

    normalizing the determined one or more adaptive filter coefficients to unity power;

    differencing the normalized one or more adaptive filter coefficients with an all-pass filter, the differencing including a difference between an equalizer main tap coefficient and unity; and

    estimating the channel distortion based upon the differencing of the normalized one or more adaptive filter coefficients including the equalizer main tap coefficient.

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