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SYSTEM AND METHOD FOR FAST CODE PHASE AND CARRIER FREQUENCY ACQUISITION IN GPS RECEIVER

  • US 20090161736A1
  • Filed: 02/27/2009
  • Published: 06/25/2009
  • Est. Priority Date: 08/09/2000
  • Status: Active Grant
First Claim
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1. A method for detecting code phase in a GPS signal, comprising:

  • collecting a multiple millisecond portion of a GPS signal in a GPS receiver;

    partitioning the multiple millisecond portion of the GPS signal into a plurality of one millisecond segments;

    converting each of the one millisecond segments to the frequency domain;

    multiplying each of the converted one millisecond segments by a frequency domain representation of a Gold code corresponding to a GPS satellite to generate a plurality of products;

    converting each of the plurality of products to the time domain to obtain convolution signals between each one millisecond segment and the Gold code; and

    combining said convolution signals to determine a correlation peak that is reflective of a code phase of the GPS signal.

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