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System and method for protecting against spoofed A-GNSS measurement data

  • US 7,956,803 B2
  • Filed: 12/01/2008
  • Issued: 06/07/2011
  • Est. Priority Date: 12/01/2008
  • Status: Expired due to Fees
First Claim
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1. A method of detecting one or more forged satellite measurements transmitted from a wireless device, comprising the steps of:

  • (a) transmitting information to a wireless device, the information including a request that the wireless device provide a portion of a navigation data message from one or more satellites to a location determining system;

    (b) receiving one or more satellite measurements and the portion of the navigation data message from the wireless device;

    (c) determining the navigation data message as a function of information from a reference network; and

    (d) comparing the determined navigation data message with the received navigation data message portion to thereby determine whether any of the one or more satellite measurements have been forged.

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