Analysis of the Anti-Spoofing Performance of Acquisition with Threshold Method

With the rapid development of navigation technologies, spoofing has become a significant threat to navigation system. As a key step in receiver signal processing, acquisition is an important barrier to anti-spoofing. Nowadays, researching on anti-spoofing performance of acquisition is in a blank stage, threshold method in acquisition is the most commonly used detection strategy. In this article, we add a single spoofing signal on GPS P code and through the construction of mathematical model, we define successful probability of anti-spoofing as the assessment standard, then we analyze the relationship between factors influencing acquisition threshold and the successful probability of anti-spoofing, finally we give the theoretical calculate method of upper bound of threshold method's anti-spoofing performance, which all have a guiding significance for the design of receiver.