Carrier Tracking Algorithm for High Dynamic Signals Based on Kalman Filter

The received signal in high dynamic environment will cause a large Doppler shift and change rate. In the high dynamic environment the traditional carrier tracking algorithm is not proper and reliable. Therefore it is needed a better performance of tracking algorithm. This paper first analyzed the traditional second order CPAFC with third order Phase lock loop carrier tracking loop and a high dynamic Kalman filter. Also a new high dynamic carrier tracking loop based on Kalman filter for second order CPAFC loop with third order Phase Lock Loop carrier tracking is designed. The simulation results of different Carrier to noise ratio of 35dB-Hz, 45dB-Hz and 55dB-Hz show that the new design of Kalman filter with CPAFC algorithm has better adaptation to the high dynamic environment. Also the tracking performance is better than traditional algorithm