Jitter tracking anti-spoofing algorithm
| DWPI Title: Method for identifying global navigation satellite system or global positioning system signals for permitting navigation in civilian and military applications, involves detecting set of global navigation satellite system carrier signals |
| Abstract: A system and method to distinguish spoofing signals from true GNSS signals is disclosed. One aspect of the present invention combines measuring GNSS carrier signals with measuring jitter in a vehicle's position via a low-cost inertial measurement unit (IMU) to distinguish spoofing signals from true GNSS signals. The present invention employs natural and/or artificial jitter of a vehicle, that, when combined with a tightly coupled inertial navigation system (INS), allows the receiver to distinguish the spoofing GNSS signal from the true GNSS signal. This spoofer survivability algorithm may be implemented, for example, in the software of a GNSS (or GPS) navigation system. |
| Use: Method for identifying true and falsified GNSS or GPS signals for permitting continued navigation in civilian and military applications. Uses include but are not limited to aerial drones, autonomous vehicles, infrastructure monitoring and support, electrical systems timing, stock exchanges, and cellular telephones. |
| Advantage: The method enables combining measuring characteristics of GNSS carrier signals with measuring a jitter in a vehicle's position through a low-cost inertial measurement unit (IMU) to distinguish spoofing signals from true GNSS signals in the carrier-tracking of a receiver, thus allowing automated systems to continue to navigate in presence of intelligent, directed spoofing. |
| Novelty: The method involves detecting a set of global navigation satellite system (GNSS) carrier signals (1510). Characteristics of the set of GNSS carrier signals is temporally tracked (1520) for creating dither data. The dither data is compared (1530). A falsified GNSS carrier signal is identified based upon a degree of correlation of the dither data. The set of GNSS carrier signals is temporally tracked for creating signal source data. The signal source data is filtered to remove multi-path signals. A remaining signal source data is binned into signal sets. Signal sets that produce a corresponding internally consistent position is determined according to a cost function based on a consistency. |
| Filed: 8/18/2021 |
| Application Number: US17405478A |
| Tech ID: SD 15039.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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