A civil navigation signal is vulnerable to interference and tampering owing to its open interface and low signal power. We focus on navigation spoofing. First, using a piecewise function, we quantitatively analyze the effects of the navigation spoofing signal on the receiver tracking loop. For a phase-locked loop, the spoofing signal extends the pull-in range of the discriminator. The autocorrelation gain of the spoofing signal has a different effect on the slope of the discriminator, depending on whether the discriminator is related to the signal amplitude. For the delay-locked loop, taking the non-coherent early minus late power method as an example, the unlocking condition and interval are analyzed quantitatively using the spoofing amplitude gain and the initial phase cosine of the spoofing and authentic carriers. A carrier frequency difference between the spoofing signal and authentic signal causes a phase jump and attenuation of the amplitude gain. Second, in luring an unmanned aerial vehicle (UAV) to a designated location, we assume a UAV model and provide a spoofing strategy. Experimental results show that it is feasible to lure a civilian quadrotor UAV to a designated location about 50 m from where the UAV believes it is located.

中文翻译：

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导航欺骗信号对接收机环路的影响和无人机欺骗方法

民用导航信号由于其开放的接口和低信号功率而容易受到干扰和篡改。我们专注于导航欺骗。首先，使用分段函数，我们定量分析了导航欺骗信号对接收器跟踪环路的影响。对于锁相环，欺骗信号扩展了鉴别器的引入范围。欺骗信号的自相关增益对鉴别器的斜率有不同的影响，这取决于鉴别器是否与信号幅度有关。对于延迟锁定环路，以非相干早负功率方法为例，利用欺骗幅度增益和欺骗载波与真实载波的初始相位余弦，定量分析了解锁条件和间隔。欺骗信号和真实信号之间的载波频率差异会导致相位跳变和幅度增益衰减。其次，在将无人飞行器（UAV）吸引到指定位置时，我们采用了UAV模型并提供了欺骗策略。实验结果表明，将民用四旋翼无人机引诱到距其认为的位置约50 m的指定位置是可行的。