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Sliced bandwidth distortion prediction

  • US 6,389,068 B1
  • Filed: 05/15/2000
  • Issued: 05/14/2002
  • Est. Priority Date: 05/15/2000
  • Status: Expired due to Term
First Claim
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1. A method of estimating distortion of a communications medium having a given bandwidth comprising:

  • receiving a plurality of test signals from the communications medium, wherein each of the plurality of test signals has a test bandwidth that is a fraction of the given bandwidth, wherein each of the plurality of test signals occupies a different portion of the given bandwidth;

    processing each of the plurality of test signals with an equalizer;

    evaluating equalizer coefficients for each of the plurality of test signals to determine a time when a dominant channel distortion occurs; and

    determining a differential group delay based upon the time determined for each of the plurality of test signals, wherein the differential group delay approximates a phase distortion of the communications medium.

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