电力行业基于载噪比的卫星导航欺骗检测技术  

Satellite navigation deception detection technology based on carrier to noiseratio in the electricity industry

作　　者：田静 谭论语 张榆喻 杨馨 刘文祥[1] TIAN Jing;TAN Lunyu;ZHANG Yuyu;YANG Xin;LIU Wenxiang(School of Electronic Science,National University of Defense Technology,Changsha 410000,China)

机构地区：[1]国防科技大学电子科学学院,长沙410000

出　　处：《全球定位系统》2024年第6期8-13,共6页Gnss World of China

摘　　要：由于民用导航信号公开,易遭受到恶意欺骗和干扰,一旦电力行业授时系统遭到欺骗,国家电力系统将难以正常运行.针对北斗卫星导航系统(BeiDou Navigation Satellite System,BDS)面临恶意欺骗且现有反欺骗检测技术复杂度高难以广泛应用的现状,通过建立二元假设检验,提出了基于载噪比(carrier to noise ratio,CNR)的时间差分和星间差分欺骗检测方法.由于欺骗信号CNR普遍高于真实信号,故将卫星信号的CNR进行时间差分来判断是否发生异常突变,以此来检测大功率欺骗信号.另外,单一天线发射的欺骗信号CNR相同,而真实北斗卫星信号星间CNR存在差异,所以将不同卫星信号之间CNR差值检测是否存在同一欺骗源发射的欺骗信号.通过对实验平台采集的数据进行处理与分析,成功验证了基于CNR的时间差分和星间差分的欺骗检测算法.Due to the public disclosure of civil navigation signals,they are susceptible to malicious deception and interference.Once the timing system of the power industry is deceived,the national power system will find it difficult to operate normally.In response to the current situation of malicious deception faced by the BeiDou navigation system and the high complexity of existing anti deception detection technologies that are difficult to widely apply,this paper establishes a binary hypothesis test and proposes time difference and inter satellite difference deception detection methods based on carrier to noise ratio(CNR).As the CNR of deception signals is generally higher than that of real signals,this paper uses time difference to determine whether the CNR of satellite signals has abnormal changes,in order to detect high-power deception signals.In addition,since the CNR of deception signals transmitted by a single antenna is the same,while there are differences in the inter satellite CNR of real BeiDou satellite signals,this paper uses the CNR difference between different satellite signals as zero to detect the existence of deception signals transmitted by the same deception source.By processing and analyzing the data collected from the experimental platform,the time difference and inter satellite difference deception detection algorithms based on CNR were successfully validated.

关 键 词：电力行业 欺骗检测 载噪比(CNR) 差分 北斗卫星导航系统(BDS) 

分 类 号：P228[天文地球—大地测量学与测量工程] TN967.1[天文地球—测绘科学与技术]