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Impulse noise effect reduction

  • US 5,703,904 A
  • Filed: 12/29/1995
  • Issued: 12/30/1997
  • Est. Priority Date: 12/29/1995
  • Status: Expired due to Term
First Claim
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1. A receiver comprising:

  • an input terminal for receiving input signals;

    means coupling an adaptive filter means to said input terminal, said adaptive filter means being normally adjustable as a function of the signals received at said input terminal;

    detector means for sensing the amplitude of the input signals received at said input terminal and comparing the amplitude to a threshold level for producing a control signal having first value when the amplitude of the input signal is below the threshold level and having a second value when the amplitude of the input signal exceeds the threshold level;

    means responsive to said control signal coupled to said adaptive filter means for preventing adjustment of said adaptive filter means when said control signal has said second value; and

    means responsive to the expected occurrence of an input signal exceeding the threshold level for producing a control signal coupled to said adaptive filter means for preventing adjustment of said adaptive filter means for a first period of time preceding the expected occurrence of a signal exceeding the threshold level and a second period of time following the expected occurrence of the signal exceeding the threshold level.

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