A forwarding spoofing detection algorithm for Beidou navigation satellite system vulnerability

IF 1.4 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Acta Geodaetica et Geophysica Pub Date : 2024-09-16 DOI:10.1007/s40328-024-00453-y

Jiangtao Xu, Yajuan Guo, Daohua Zhu, Yunxiao Sun, Wei Huang, Xindong Zhao

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Abstract

With the Beidou navigation system's fast expansion in China, it is popular in military and civilian aspects. However, since the satellite orbit operates at an extremely high position and there is energy loss during the propagation process, the receiver only picks up a very faint signal, which makes the Beidou receiver very vulnerable to interference. The interference of the receiver is divided into natural interference and human interference, of which the human interference is particularly serious. Deception is commonly used in human interference. The deception interference detection technology in Beidou navigation system is studied in this research. Firstly, the signal in the signal capture stage is detected by multi-peak detection algorithm to determine the signal type. If it cannot be determined, the signal is detected by the half-peak full-width algorithm, so as to determine the signal type. In the stage of signal tracking, the Doppler shift of the spoofing signal is applied to determine whether the signal is spoofed or not. When the spoofing signal forwarding delay is set to 0.5 and 1 chip respectively, the full width of half peak is 8.56 and 11.35 after fitting the main peak. If the half-peak full width exceeds the normal navigation signal, it indicates spoofing interference. The constructed model can effectively track downspoofing signals and improve the Beidou navigation system’s detection performance.

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北斗卫星导航系统漏洞转发欺骗检测算法

随着北斗导航系统在中国的快速推广，它在军事和民用方面都很受欢迎。然而，由于卫星轨道运行位置极高，传播过程中存在能量损耗，接收机只能接收到非常微弱的信号，这使得北斗接收机非常容易受到干扰。对接收机的干扰分为自然干扰和人为干扰，其中人为干扰尤为严重。人为干扰常用欺骗手段。本研究对北斗导航系统中的欺骗干扰检测技术进行了研究。首先，在信号捕获阶段通过多峰检测算法对信号进行检测，判断信号类型。如果无法确定，则采用半峰全宽算法检测信号，从而确定信号类型。在信号跟踪阶段，应用欺骗信号的多普勒频移来判断信号是否为欺骗信号。当欺骗信号转发延迟分别设置为 0.5 和 1 芯片时，拟合主峰后的半峰全宽分别为 8.56 和 11.35。如果半峰全宽超过正常导航信号，则表明存在欺骗干扰。所构建的模型能有效跟踪下扰信号，提高北斗导航系统的检测性能。

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来源期刊

Acta Geodaetica et Geophysica GEOCHEMISTRY & GEOPHYSICS-

CiteScore

3.10

自引率

7.10%

发文量

期刊介绍： The journal publishes original research papers in the field of geodesy and geophysics under headings: aeronomy and space physics, electromagnetic studies, geodesy and gravimetry, geodynamics, geomathematics, rock physics, seismology, solid earth physics, history. Papers dealing with problems of the Carpathian region and its surroundings are preferred. Similarly, papers on topics traditionally covered by Hungarian geodesists and geophysicists (e.g. robust estimations, geoid, EM properties of the Earth’s crust, geomagnetic pulsations and seismological risk) are especially welcome.