| Citation: | WANG Yizhe, FENG Cunqian, LI Jingqing, et al. Micro-Doppler resolution of multi-ballistic targets in midcourse[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(1): 113-120. doi: 10.13700/j.bh.1001-5965.2016.0038(in Chinese)
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To solve the problems of overlapping and difficult separation of micro-Doppler information of multi-ballistic target echo in narrow-band radar, a novel method based on auction algorithm and wavelet analysis is proposed to separate micro-Doppler of multi-ballistic targets. First, based on the sliding scattering model, the time-frequency skeleton is obtained by preprocessing. Then, the path length is defined by variation rules of Doppler and estimated precession period. The shortest paths corresponding to Doppler curves are extracted by auction algorithm. Finally, micro-Doppler resolution of multi-ballistic targets is realized after translational motion compensation by wavelet analysis. Simulation results indicate that the method can solve path selection problems well in intersection region, and is suitable for various forms of micro-motion.
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