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Methods and apparatus for obtaining accurate GNSS time in a GNSS receiver

  • US 7,629,924 B2
  • Filed: 09/06/2007
  • Issued: 12/08/2009
  • Est. Priority Date: 09/06/2007
  • Status: Active Grant
First Claim
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1. A method for obtaining Global Navigation Satellite System (GNSS) time in a GNSS receiver, the method comprising:

  • deriving a relationship between a first clock signal and the received GNSS time;

    latching a second clock signal and the first clock signal at a first latching point to obtain a clock value A1 of the first clock signal and a clock value B1 of the second clock signal;

    calculating a GNSS time C1 corresponding to the clock value A1 according to the relationship;

    latching the first clock signal and the second clock signal at a second latching point to obtain a clock value B2 of the second clock signal; and

    calculating a GNSS time C2 according to the GNSS time C1, the clock value B1, and the clock value B2.

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