GNSS spoofing detection for single antenna receivers via CNR variation monitoring  

作　　者：LIAO Maoyou LYU Xu MENG Ziyang YOU Zheng 

机构地区：[1]Department of Precision Instrument,Tsinghua University,Beijing 100084,China

出　　处：《Journal of Systems Engineering and Electronics》2024年第5期1276-1286,共11页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(62273195).

摘　　要：In this paper,a method for spoofing detection based on the variation of the signal’s carrier-to-noise ratio(CNR)is proposed.This method leverages the directionality of the antenna to induce varying gain changes in the signals across different incident directions,resulting in distinct CNR variations for each signal.A model is developed to calculate the variation value of the signal CNR based on the antenna gain pattern.This model enables the differentiation of the variation values of the CNR for authentic satellite signals and spoofing signals,thereby facilitating spoofing detection.The proposed method is capable of detecting spoofing signals with power and CNR similar to those of authentic satellite signals.The accuracy of the signal CNR variation value calculation model and the effectiveness of the spoofing detection method are verified through a series of experiments.In addition,the proposed spoofing detection method works not only for a single spoofing source but also for distributed spoofing sources.

关 键 词：spoofing detection global navigation satellite system(GNSS) variation of carrier-to-noise ratio(CNR) antenna directionality 

分 类 号：TN967.1[电子电信—信号与信息处理]