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Reconfigurable programmable digital filter architecture useful in communication receiver

  • US 5,388,062 A
  • Filed: 05/06/1993
  • Issued: 02/07/1995
  • Est. Priority Date: 05/06/1993
  • Status: Expired due to Term
First Claim
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1. In a reconfigurable programmable digital filter structure suitable for use as a deghosting filter;

  • wherein said structure includes first and second input-weighted digital filter means each of which has a given number of multiplier-coefficient taps;

    a combination comprising;

    input means for providing input signals to said digital filter means;

    filter-reconfiguration means including multiplexer means coupled to said digital filter means (1) for configuring said first and second digital filter means for operation as a single complex digital filter means with said given number of complex multiplier coefficients for a complex sampled input signal provided thereto by said input means, or (2) for configuring at least one of said first and second digital filter units for operation as a separate real digital filter means with twice said given number of real multiplier coefficients for a real sampled input signal provided thereto by said input means; and

    output means for receiving output signals from said digital filter means.

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