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GPS receiver with fast acquisition time

  • US 7,551,132 B2
  • Filed: 01/03/2006
  • Issued: 06/23/2009
  • Est. Priority Date: 07/02/2004
  • Status: Expired due to Fees
First Claim
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1. A method for slewing pseudorandom code generators comprising the steps of:

  • acquiring a plurality of navigation ranging signals from a plurality of space vehicles;

    correlating said navigation ranging signals with one of a plurality of local signals generated by a plurality of pseudorandom code generators, for obtaining a plurality of time-integrated correlation values; and

    slewing said pseudorandom code generators until said local signals are time-aligned with pseudorandom signals contained in said navigation ranging signals;

    wherein said slewing of said pseudorandom code generators takes place simultaneously and periodically for all said code generators, with a repetition period which is shorter than the proper period of said local signals.

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