Spoofing has become a severe threat to the security of the Beidou navigation satellite sys-tem.Aiming at spoofing and interference issues faced by the Beidou system,a binary hypothesis testing model is established.Since the carrier-to-noise ratio of visible stars with high pitch angle at the current observation frequency will have the same variation trend after the spoofing interference transmitted by a single antenna is applied,a detection method of Beidou satellite signal spoofing interference by using K-means clustering algorithm is proposed based on this variation rule,and the definition of the variation domain of carrier-to-noise ratio after spoofing is given.Finally,by setting up the test environment in the field,the actual data are verified by experiment.The experi-mental results show that the detection probability of high-power advantage spoofing signals with a spoofing power advantage of no less than 6 dBm can reach over 95％,providing an useful reference for improving the anti-interference ability of the receiver.
维普
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