A spoofing attack on a global navigation satellite system (GNSS) receiver is a threat to a significant community of GNSS users due to the high stakes involved. This paper investigates the use of slope based metrics for the detection of spoofing. The formulation of slope based metrics involves monitoring correlators along with tracking correlators in the receiver's channel, which are slaved to the prompt tracking correlator. In this study, using some candidate metrics, detectors have been formed through the analysis of simulated spoofing attacks. A theoretical variance of each metric has also been calculated as a reference for the threshold. A threshold is estimated using the measured variance from the clean signals, for specific false alarm rate. By using the measured threshold, detectors are formed based on slope metrics. These detectors have been tested using TEXBAT data. The results show that the differential slope metrics have good performance. The results have also been compared with some other techniques of spoofing detection.

中文翻译：

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通过基于斜率的度量检测对全球导航卫星系统接收机的中间欺骗攻击

由于涉及高风险，对全球导航卫星系统 (GNSS) 接收器的欺骗攻击对重要的 GNSS 用户社区构成威胁。本文研究了使用基于斜率的度量来检测欺骗。基于斜率的度量的制定涉及监视相关器以及接收器信道中的跟踪相关器，这些相关器从属于即时跟踪相关器。在这项研究中，使用一些候选指标，通过对模拟欺骗攻击的分析形成了检测器。还计算了每个指标的理论方差作为阈值的参考。对于特定的误报率，使用来自干净信号的测量方差来估计阈值。通过使用测量的阈值，基于斜率度量形成检测器。这些探测器已经使用 TEXBAT 数据进行了测试。结果表明，差分斜率度量具有良好的性能。该结果还与其他一些欺骗检测技术进行了比较。