Application of Extended Kalman Filter for tracking high dynamic GPS signal

摘要

This paper introduces the Extended Kalman Filter (EKF) to realize high dynamic tracking of GPS signal. It's compared with the traditional tracking loop with a third-order phase-locked loop (PLL), which is assisted by a second-order frequency-locked loop (FLL) and a second-order delay-locked loop (DLL). It can estimate carrier phase, Doppler shift, rate of change of Doppler shift and code phase in real-time for higher dynamics. The results of simulation show that the new tracking method can not only improve the dynamic acceleration as high as 100g, also improve the tracking accuracy.