全球定位系统2024，Vol.49Issue(4)：66-74,9.DOI:10.12265/j.gnss.2023235
多相关器联合功率GNSS欺骗干扰检测方法研究
Research on GNSS spoofing interference detection for multi-correlator combined power
摘要
Abstract
Global Navigation Satellite System(GNSS)civil signals are vulnerable to external spoofing because of their openness and vulnerability.As an effective method for spoofing detection,Signal Quality Monitoring(SQM)monitors the correlation results of early code,late code and phase code(ELP)after the receiver's tracking loop,and compares them with the correlation characteristics without spoofing to determine whether spoofing interference exists.The conventional SQM algorithm uses only three ELP information and the detection performance is limited.Therefore,a multi-correlator combined power algorithm is proposed.The weight of the output power of multiple equally spaced correlators between ELP is taken as the detection quantity,and the inverse ratio of the correlation time and the real-time code time difference is taken as the weighting coefficient.The probability distribution characteristics of the detected quantity were further analyzed,and the optimal detection threshold was determined based on the Neyman-Pearson theory.By comparing the detected quantity and the detection threshold,the existence of deception interference was determined.Based on the Scenario 4 set published by the University of Texas,the test results show that compared with typical SQM algorithms such as Ratio and ELP,the proposed algorithm has both high detection probability and fast early warning response time under different false alarm rates.关键词
卫星导航/欺骗干扰/码跟踪环/信号质量监测/多相关器Key words
satellite navigation/deceptive interference/code tracking loop/signal quality monitoring/Multi-correlator分类
测绘与仪器引用本文复制引用
赵慎,廖一霏,李世玲,周开军..多相关器联合功率GNSS欺骗干扰检测方法研究[J].全球定位系统,2024,49(4):66-74,9.基金项目
资助项目:国家自然科学基金项目(61976088) （61976088）
湖南省教育厅科学研究项目(23A0464) （23A0464）
湖南省研究生科研创新项目(QL20230271) （QL20230271）
