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SYSTEM AND METHOD FOR DETERMINING FALSIFIED SATELLITE MEASUREMENTS

  • US 20100127923A1
  • Filed: 11/24/2008
  • Published: 05/27/2010
  • Est. Priority Date: 11/24/2008
  • Status: Active Grant
First Claim
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1. A method for determining whether a wireless device has transmitted one or more forged satellite measurements, comprising the steps of:

  • (a) determining an estimated location of a wireless device;

    (b) for each one of a first set of satellites from which the wireless device receives a signal;

    (i) determining expected frequency information as a function of the estimated location,(ii) measuring actual frequency information, and(iii) comparing the expected frequency information with the measured frequency information; and

    (c) identifying one or more satellite measurements received from the wireless device as forged if a difference between the expected and measured frequency information is greater than a predetermined threshold.

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