Micro-Doppler Extraction from Space Cone Target Based on Multiple Target Tracking

Based on the equivalent scatter center model, the relationship between the micro-Doppler frequencies and the motion parameters of the space cone target with precession or nutation is analyzed. Due to the complicated form of the micro-Doppler frequency mentioned above, an approach to separate the micro-Doppler frequency curve of each equivalent scatter center in the Time Frequency Distribution (TFD) of target echo is proposed in this paper. In this method, classical Short-Time Fourier Transformer (STFT) is first used to obtain the TFD of the target echo; then the Multiple Target Tracking (MTT) algorithm is applied to track the micro-Doppler frequency curves in the TFD, which are assumed to be the tracks of maneuvering targets. Thus the micro-Doppler frequencies of each equivalent scatter center are extracted via the method. In the simulation experiments, the performance of the proposed method is evaluated via the electromagnetic computation simulated data.