Abstract
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.
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