This article demonstrates global positioning system (GPS) spoofing with a commercial, off-the-shelf software-defined radio (SDR) emitter fitted with a local oscillator exhibiting a stability consistent with the medium-term (0.01–1 000 s) stability of atomic clocks on GPS satellite systems. Computationally efficient means of detecting spoofing is then addressed, namely codeless spoofing detection by phase-difference measurement of the signals received from a two-antenna array. We conclude by using a simple and effective method to suppress spoofing to restore positioning and time-transfer capabilities, and extend the demonstration to jamming cancellation. Experiment results demonstrate the performance of the proposed methods with an emphasis on computational efficiency for real-time execution on embedded single-board computers.

中文翻译：

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软件定义的无线电实现的GPS欺骗及其计算有效的检测和抑制

本文演示了使用商业的，现成的软件定义无线电（SDR）发射器进行的全球定位系统（GPS）欺骗，该发射器配有本地振荡器，其稳定性与LTC的中期（0.01–1000 s）稳定性一致。 GPS卫星系统上的原子钟。然后提出一种检测欺骗的计算有效方式，即通过对从两个天线阵列接收的信号进行相差测量来进行无代码欺骗检测。最后，我们使用一种简单有效的方法来抑制欺骗，以恢复定位和时间传递功能，并将演示扩展到干扰消除。实验结果证明了所提出方法的性能，并着重于在嵌入式单板计算机上实时执行的计算效率。