Improve the Doppler frequency estimation accuracy using adaptive interacting multiple model algorithm

Body target characteristic, multiple scatter point and multiple path effect shall make Doppler frequency become wave and skip than ideal case, especially near the point of approach. In light of the characteristics and changing orderliness of the Doppler signal, the paper presents a method that uses adaptive interacting multiple models algorithm to improve the estimate accuracy of Doppler frequency. The simulation results show that the proposed method can effectively improves the smoothness of the Doppler frequency curve.