×

Systems and methods for detecting GPS measurement errors

  • US 7,821,454 B2
  • Filed: 11/20/2007
  • Issued: 10/26/2010
  • Est. Priority Date: 11/20/2007
  • Status: Expired due to Fees
First Claim
Patent Images

1. A system for detecting global positioning system (GPS) measurement errors comprising:

  • a navigation device configured to receive GPS signals from signal sources, the navigation device being configured to calculate pseudoranges (PRs) and delta ranges (DRs) based on the received GPS signals, the navigation device including a consistency check algorithm configured to;

    calculate delta PRs;

    determine whether at least one difference between respective calculated delta PRs and DRs exceeds a first threshold; and

    in response to determining that the at least one difference does not exceed the first threshold, accumulate the differences between the respective calculated delta PRs and DRs, determine whether the accumulation of the differences between the respective calculated delta PRs and DRs exceeds a second threshold, and indicate that an error exists in the respective calculated PRs and DRs if the accumulation of the differences exceeds the second threshold.

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