GNSS spoofing signal parameters estimation based on Newton’s method

Spoofing interference is a major threat to the development of Global Navigation Satellite System (GNSS) applications. In order to solve the large computation resource consumption problem of estimation methods, this paper proposed a spoofing signal parameters estimation method based on Newton’s method. This method constructed a nonlinear estimation model of signal parameters in the spoofing scenario, taking the estimation of code phases as the core. The code phases were iterated by Newton’s method, and the signal amplitudes and carrier phases were estimated by the least square method. The simulation results showed that the average number of iterations was about 10, greatly improving the effectiveness of signal parameters estimation compared with the traditional estimation method. Moreover, this method could also improve the estimation accuracy in the small delay scenarios.