GNSS Spoofing Detection based on Correlator Outputs Stationarity Monitoring
Huiqi Tao, Hong Li, Fengkui Chu, Mingquan Lu, Peng Liu · Proceedings of the Institute of Navigation ... International Technical Meeting/Proceedings of the ... International Technical Meeting of The Institute of Navigation · 2017
In GNSS receiver, correlation values can reflect the change of received signal power and the stability of tracking loop simultaneously. This is important for GNSS spoofing detection. Some methods have been proposed to monitor correlator outputs, such as signal quality monitoring and testing the goodness of fit based on ?2 distribution. However, they are invalid in some applications because of the limitation of assumption. This paper focuses on the stationarity of correlation values and proposes a method to monitor the stationarity for spoofing detection. Hypothesis testing methods based on mathematical statistics are employed in this paper, including F-test and paired two-sample t-test. Detailed discussion and performance evaluation are provided in the paper. Simulation results demonstrate the effectiveness of the method.