Anti-Spoofing Filter for Accurate GPS Navigation

K. Deergha Rao, M.N.S. Swamy and E.I. Plotkin

Abstract:	Most civilian GPS receivers are designed to use the C/A code rather than the P-code. However, there is a threat to the C/A code users from GPS signal spoofing because the most commonly used extended Kalman filter (EKF) for navigation solution may not fulfil the accuracy requirements for continued navigation with the spoofed GPS signals. Therefore, in this paper, an anti-sooting filter has been developed for accurate GPS navigation with the spoofed GPS signals. In this approach, the state prediction and innovation steps of the conventional EKF are modified using the robust statistics concept to obtain more accurate state estimate in the presence of GPS spoofing. Simulation results are provided to confirm the efficacy of the approach.
Published in:	Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT
Pages:	1536 - 1541
Cite this article:	Rao, K. Deergha, Swamy, M.N.S., Plotkin, E.I., "Anti-Spoofing Filter for Accurate GPS Navigation," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 1536-1541.
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