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Acquisition through circular correlation by partition for GPS C/A code and P(Y) code

  • US 6,567,042 B2
  • Filed: 12/04/2000
  • Issued: 05/20/2003
  • Est. Priority Date: 12/04/2000
  • Status: Expired due to Fees
First Claim
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1. An efficient, data processing minimizing GPS data acquisition software method comprising the steps of:

  • receiving a GPS signal;

    considering N data bits of locally generated P code in block-to-block correspondence with N data bits from said receiving step;

    manipulating N data bits from said receiving and considering steps into a subdivision of data bits, said subdivision of data bits constituting less than a complete transmitted pattern from said receiving step;

    applying a circular fast Fourier transform correlation algorithm on said data bits from said manipulating step;

    repeating said applying step until an output of said applying step is above a preselected acquisition threshold value; and

    determining time and Doppler frequency of said GPS signal.

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