GNSS Spoofing Detection by Crowdsourcing Double Differential Pseudorange Spatial Distribution
It is widely known that spoofing is a major threat that adversely impacts the reliability and accuracy of GNSS applications. In this study, a crowdsourcing double differential pseudorange spatial (D2SP) random set is constructed and the distribution of the set is derived.Based on the variance of the D2SP set, a tri-level hypothesis detection algorithm is designed to classify spoofing-free, fully-spoofed, and partially-spoofed cases in the region of interest (ROI).It does not require the prior knowledge of the truth positions or relative distances of the receivers.Simulation test results show that the proposed D2SP spoofing detection method has the advantages of lower computational complexity and higher tolerance for multipath errors compared with the generalized likelihood ratio test (GLRT) method that is the current mainstream spoofing detection algorithm based on multiple receivers' differential pseudoranges.Moreover, it also shows better flexibility for different sizes of ROI and numbers of the crowdsourcing receivers.
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