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Reduction of time error in GPS localization without a highly accurate clock

  • US 6,292,748 B1
  • Filed: 07/14/2000
  • Issued: 09/18/2001
  • Est. Priority Date: 07/14/2000
  • Status: Expired due to Term
First Claim
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1. A method for implementing a signal processing system that lessens time error in a Global Positioning System (GPS) receiver while using a time clock that is predisposed to drift in the GPS receiver, said method comprising the steps of:

  • receiving, at the GPS receiver, sequences of data bits from a GPS satellite transmitter;

    detecting candidate word-alignment positions in the received data bit sequences;

    selecting one of said candidate word-alignment positions as being correct; and

    synchronizing the time clock with the time of transmission associated with the selected word-alignment position.

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