Keynote: The Benefits of Low Cost Accelerometers for GNSS Anti-Spoofing

作者：Sherman Lo, Yu Hsuan Chen, Tyler Reid, Adrien Perkins, Todd Walter, Per Enge · 发表于：Proceedings of the ION ... Pacific PNT Meeting/Proceedings of the Institute of Navigation Pacific PNT · 年份：2017 · DOI：10.33012/2017.15109 · 被引用次数：21 · 研究领域：Transportation Safety and Impact Analysis、GNSS positioning and interference、Bluetooth and Wireless Communication Technologies

Global navigation satellite systems (GNSS) are integral to aviation navigation and precise landings. It will be fundamental to many other safety of life applications such as railway and autonomous vehicles. To truly protect these systems and maintain safety, we need to not just address nominal hazards but also deliberate threats such as spoofing. Many methods have been proposed to address spoofing. A natural suggestion is to compare GNSS with other independent sensors, particularly inertial sensors. This paper develops a GNSS spoof monitoring methodology that uses comparisons with an inertial sensor. The methodology differs from prior methods developed and uses comparisons of accelerometers and GNSS acceleration (rather than position or velocity). This structure keeps the two instruments independent which makes it a steady state test and allows for tests over time. This paper develops and examines the use of acceleration from low cost sensors to detect GNSS spoofing in safety of life applications. We examine if there are suitably random accelerations and whether low inertial sensors can provide useful comparison to GNSS. Then we examine how we can use these measurements to provide robust spoof detection. First, we examine whether there are adequate signals from the vehicle and whether they are sufficiently measurable by both GNSS and low cost accelerometers. The conjecture is that it is difficult for malicious spoofer to predict and hence replicate the accelerations experienc...