Real-time interference detection and mitigation in robust tracking loop of GPS receiver

摘要

Spoofing has a vital role in distortingaEuroZ global positioning system (GPS) signals. In this paper, a plenary anti-spoofing approach based on correlation and adaptive aEuroZKalman filtering is proposed to distinguish and then diminish spoofing effects. The suggested aEuroZmethod can be easily implemented in tracking loop of GPS receiver. According to the actual situation, the receiver requires constantly adjusting the system model or filtering parameters. We will study a real-time spoof recognition aEuroZmethod that has clear certainty by introducing a reliable exhaustive metric. In aEuroZcompensation phase, a kind of innovation based Adaptive Extended Kalman Filter (AEKF) is addressed and a new system model is put forward. As a primary step, the proposed technique is aEuroZimplemented in software receiver to prove the concept of idea in a multipath-free aEuroZscenario. Three different data sets have been collected to use in the aEuroZperformance assessment of the method. The results indicate that the investigated algorithm is aEuroZable to perform a real-time detection and reduce the miss-adjustment of steady-state positioning.