Detection of Spoofing, Jamming or Failure of GPS

Juan Vasquez, Bob Riggins

Abstract:	The Air Force has equipped its aircraft with avionic systems such as Global Positioning Systems (GPS) and Inertial Navigation Systems (INS) capable of providing accurate navigation solutions. The aircrews flying these aircraft require a system that can either survive the hostile environments encountered in combat or notify the aircrew that their performance has been significantly degraded. This paper focuses on failure detection and isolation techniques using an extended Kalman filter for the navigation solution and generalized likelihood ratios with matched filters for GPS failures. Analysis is conducted through a Kalman filter development package known as the Multimode Simulation for Optimal Filter Evaluation (MSOFE)[S]. Both a large order froth model for the navigation system (in which a full 24 satellite constellation is modeled) and a reduced-order Kalman filter are developed. Results suggest that failures within the GPS can be detected, isolated, and in some cases compensated through feedback.
Published in:	Proceedings of the 49th Annual Meeting of The Institute of Navigation (1993) June 21 - 23, 1993 Royal Sonesta Hotel Cambridge, MA
Pages:	447 - 456
Cite this article:	Vasquez, Juan, Riggins, Bob, "Detection of Spoofing, Jamming or Failure of GPS," Proceedings of the 49th Annual Meeting of The Institute of Navigation (1993), Cambridge, MA, June 1993, pp. 447-456.
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