Analyses of Anti-spoofing Threshold for GNSS Receivers
会议名称：《第三届中国卫星导航学术年会》
会议日期：2012年
学科分类：08[工学] 080401[工学-精密仪器及机械] 081105[工学-导航、制导与控制] 0804[工学-仪器科学与技术] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程]
关 键 词：GNSS satellite navigation receiver spoofing interference antispoofing threshold
摘 要：Spoofing to satellite navigation receivers refers to the interference by re-radiating the authentic signals or generating similar spoofing signals, which can conduct effective interference with lower power than conventional interference technologies. Since the traditional satellite navigation systems like GPS and GLONASS didn’t consider the impact of spoofing, the only way to improve the anti-spoofing capabilities is to develop some anti-spoofing techniques in the GNSS receivers. This paper analyze the invade process of spoofing signals into the receiver code tracking loops, and conclude the relationship between the receiver anti-spoofing threshold and the loop bandwidth and the early-late space of the DLL. Analyze results shows that by optimizing the code tracking loop parameters, the receiver anti-spoofing threshold can be improved greatly. In the end, the conclusion above is tested and verified by software-receiver simulation.