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WIRELESS COMMUNICATION DEVICE AND METHOD FOR REDUCING IN-BAND INTERFERENCE IN A GPS RECEIVER

  • US 20080175340A1
  • Filed: 01/23/2007
  • Published: 07/24/2008
  • Est. Priority Date: 01/23/2007
  • Status: Active Grant
First Claim
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1. Interference reduction circuitry to reduce in-band interference in received GPS signals caused by transmissions from a handset transmitter, the interference reduction circuitry comprising:

  • a filter to operate on digitized in-band signals to provide signals representing in-band interference;

    a summer to subtract the signals representing in-band interference from digital GPS signals; and

    control circuitry to cause the filter to provide the signals representing in-band interference when the handset transmitter is active and to cause the filter to refrain from providing the signals representing in-band interference when the handset transmitter is not active,wherein the digitized in-band signals are generated from coupled signals of the handset transmitter.

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