Radio receiver

  • US 7,346,134 B2
  • Filed: 05/14/2002
  • Issued: 03/18/2008
  • Est. Priority Date: 05/15/2001
  • Status: Active Grant
First Claim
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1. A method comprising:

  • over-sampling, at a desired frequency, a passband of received signals to create a bit stream, wherein the received signals include signals of interest and interference generating signals, the interference generating signals capable of generating intermodulation products inband of the signals of interest;

    isolating signals of interest in the bit stream using one or more decimating filters;

    isolating source signals that generate one or more intermodulation products inband of the signal of interest using one or more decimating filters;

    computing an estimate of each of the one or more intermodulation products from the source signals that generate the one or more intermodulation products;

    cancelling out one or more inband intermodulation products using the estimate of the intermodulation products; and

    performing phase and amplitude adjustment on estimations of the intermodulation product interfering signals in a closed loop manner, wherein performing phase and amplitude adjustment of the estimations comprises performing sub-sample phase shifts to make a phase adjustment on the estimations of the intermodulation product interfering signals.

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