Design of Carrier Synchronization Module Used in High-Dynamic Receivers

The carrier synchronization technique used in high-dynamic environment was studied. Learning from modeling techniques worked in radar systems, a new carrier tracker based on moving target models combined with the Kalman filter was presented, which has strong dynamic tracking capability. Both the structure and the hardware implementation are simple because it is unnecessary to calculate the matrix inversion. Besides, the auxiliary scheme between the capture module and the tracking module was investigated. Through theoretical analysis and simulation, it was proved that the optimal auxiliary method in high-dynamic receivers was the frequency-canceling-acceleration-presetting mode. Simulation results show that the proposed tracking module can work steadily in the low SNR (signal to noise ratio) circumstance and is superior to the traditional Kalman filter, in terms of the tracking accuracy and the locking probability.