基于钟差检验的GNSS授时欺骗检测与识别

针对牵引式欺骗对授时接收机危害性强且难以检测的问题,基于授时欺骗的实施原理分析了授时解的变化规律,利用欺骗实施后钟差必然累积异常的特点,提出了一种钟差构造检验统计量的授时欺骗检测与识别方法.分析了该方法的检测性能,并通过蒙特卡罗仿真验证了理论的正确性.最后使用软件接收机对TEXBAT(Texas spoofing te...

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

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.