×

Time determination in satellite positioning system receivers and methods therefor

  • US 6,944,540 B2
  • Filed: 03/28/2002
  • Issued: 09/13/2005
  • Est. Priority Date: 03/28/2002
  • Status: Active Grant
First Claim
Patent Images

1. A method in a Global Positioning System (GPS) receiver, comprising:

  • determining pseudorange measurements for at least four satellites at a coarse time corresponding to the pseudorange measurement;

    determining an offset time between a periodic GPS event of one of the four satellites and the coarse time;

    determining a time correction delta based upon the period of the Periodic GPS event, the offset time and the coarse time if an error of the coarse time is less than ½

    the period of the periodic GPS event;

    determining corrected time based upon the coarse time and the time correction delta if the error of the coarse time is less than ½

    the period of the Periodic GPS event.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×