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REJECTION OF A CLOSE-IN-FREQUENCY INTERFERER EMPLOYING A LOG DETECTOR AND CLASSICAL DOWN CONVERTER

  • US 20110053514A1
  • Filed: 01/09/2009
  • Published: 03/03/2011
  • Est. Priority Date: 01/11/2008
  • Status: Abandoned Application
First Claim
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1. A method for rejecting interference between a desired signal and an interfering signal, comprising:

  • dividing an input signal into first and second portions;

    providing first and second signal processing branches, each branch providing different signal processing methodologies;

    applying a first portion of the divided input signal to the first processing branch;

    applying a second portion of the divider input signal to the second processing branch;

    combining the outputs of the first and second processing branches to produce a sum signal and a difference signal; and

    selecting for further processing as an intermediate frequency signal one of the sum signal or the difference signal based on the sign of the difference between the frequency of a desired signal and the frequency of an interfering signal.

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