基于复合SQM方差的GNSS欺骗式干扰检测算法  

GNSS spoofing detection algorithm based on composite SQM variance

作　　者：王文益[1] 龚婧 WANG Wenyi;GONG Jing(Intelligent Signal and Image Processing Key Lab of Tianjin,CAUC,Tianjin 300300,China)

机构地区：[1]中国民航大学天津市智能信号与图像处理重点实验室,天津300300

出　　处：《中国民航大学学报》2020年第4期7-12,共6页Journal of Civil Aviation University of China

摘　　要：由于全球卫星导航系统(GNSS)信号结构的开放性和脆弱性使其易受欺骗及干扰。信号质量监视(SQM)技术已被证明可用于检测欺骗式干扰攻击,而在特定欺骗情况下仅使用单个SQM算法已无法满足即时、高性能的检测需求,因此,提出一种检测码跟踪环中复合SQM指标变化的欺骗干扰检测方法,该方法基于复合SQM方差值变化来检测欺骗,利用TEXBAT数据库实采信号进行实验分析。实验结果表明:该方法在不增加算法复杂度基础上,能在较短时间内检测到欺骗攻击,且检测性能优于复合SQM算法。GNSS is vulnerable to spoofing and interference due to its open signal structure and weak signal power.SQM has been proved being able to detect spoofing attacks.However,due to the increasing variety of existing spoofing types,a single SQM algorithm in specific spoofing situations can no longer meet the need for real-time and high performance detection of spoofing attacks.A spoofing detection method is proposed to detect the change of composite SQM in the detection code tracking loop,which can detect the existence of spoofing based on the change of variance value of composite SQM and conduct experimental analysis with actual signals of TEXBAT.Experimental results show that this method can detect spoofing attacks in a short time without increasing the complexity of the algorithm with better performance than that of the composite SQM algorithm.

关 键 词：卫星导航 欺骗式干扰 码跟踪环 复合SQM 移动方差 

分 类 号：V324.24[航空宇航科学与技术—人机与环境工程]