基于钟差检验的GNSS授时欺骗检测与识别

doi:10.12305/j.issn.1001-506X.2022.03.27

Abstract

Abstract:

Aiming at the problem that traction deception is harmful to the time service receiver and difficult to detect, based on the implementation principle of time service deception, the change law of time service solution is analyzed. Taking advantage of the characteristics that the clock difference must accumulate abnormity after the implementation of deception, a time service deception detection and recognition method using the clock difference to construct the test statistics is proposed. The detection performance of this method is analyzed, and the correctness of the theory is verified by Monte Carlo simulation. Finally, the software receiver is used to test the time spoofing scene data of TEXBAT (Texas spoofing test battery) to verify the effectiveness of this method. Because there is no need to add additional hardware to the receiver and the algorithm can still detect deception without the assistance of location information, it has high application value for global navigation satellite system timing security.

Key words: global navigation satellite system (GNSS), time spoofing, clock bias, spoofing detection

CLC Number:

TN973

Dong FU, Jing PENG, Ming MA, Feiqiang CHEN, Gang OU. GNSS time spoofing detection and discrimination based on clock bias hypothesis test[J]. Systems Engineering and Electronics, 2022, 44(3): 948-955.

Figures/Tables 10

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References 25

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参数	类型
参数	TCXO	OCXO	CSAC
h₀(s)	1.9e-21	3.4e-22	7.2e-21
h_-2(1/s)	2.5e-23	1.3e-24	2.7e-27
S_t(s)	9.5e-22	1.7e-22	3.6e-21
S_f(1/s)	4.9e-22	2.6e-23	5.3e-26

编号	文件名	欺骗类型	功率优势/dB	欺骗策略
场景1	clean	无欺骗	—	—
场景2	ds2	授时欺骗	10.0	策略1
场景3	ds3	授时欺骗	1.3	策略2
场景4	ds7	授时欺骗	1.0	策略2

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GNSS time spoofing detection and discrimination based on clock bias hypothesis test

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