Multipath and Spoofing Detection Using Angle of Arrival in a Multi-Antenna System

Thomas Bitner, Sarah Preston, David Bevly

Peer Reviewed

Abstract: This paper presents and validates a proposed algorithm for the detection and exclusion of erroneous GPS signals using angle of arrival (AOA) of GPS signals and differential carrier phase measurements. First, the attitude of the instrumented vehicle is estimated using a multi-antenna GPS receiver. Once an attitude estimate has been established, it can be propagated forward between GPS measurements using an IMU in a GPS/INS extended Kalman filter (EKF). New measurements may then be checked for angle of arrival, with accepted measurements used to further estimate position and attitude. New attitude estimates are then propagated forward to repeat the checking stage of the algorithm. Results show that the proposed algorithm is a viable method of rejecting signals. Rejected signals are verified as multipath by plotting positioning solutions before and after signal removal on a map of the area the data was taken. Rejected signals are also verified by comparing the expected and measured pseudorange measurements over the periods of time before, during, and after a signal is rejected.
Published in: Proceedings of the 2015 International Technical Meeting of The Institute of Navigation
January 26 - 28, 2015
Laguna Cliffs Marriott
Dana Point, California
Pages: 822 - 832
Cite this article: Bitner, Thomas, Preston, Sarah, Bevly, David, "Multipath and Spoofing Detection Using Angle of Arrival in a Multi-Antenna System," Proceedings of the 2015 International Technical Meeting of The Institute of Navigation, Dana Point, California, January 2015, pp. 822-832.
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