| Citation: | LIU Fengkai, FENG Cunqian, HUANG Darong, et al. High-resolution imaging algorithm of high-speed maneuvering target with Doppler ambiguity removal[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(1): 150-158. doi: 10.13700/j.bh.1001-5965.2019.0648(in Chinese)
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A new ISAR imaging algorithm for high-speed maneuvering target is proposed to solve the Doppler ambiguity problem under Migration Through Range Cells (MTRC). First, the algorithm transforms the original signal to the image domain, then extracts the strongest scattering point, estimates the chirp rate of the point, and estimates the Doppler ambiguity number based on the maximum contrast criterion of the image. The next step is reconstructing the echo signal, correcting the MTRC, and using CLEAN technology to reduce computation and the impact of noise on imaging results. Finally, a high-resolution ISAR image without ambiguity for high-speed maneuvering target is obtained. The simulation results prove the algorithm's effectiveness and strong robustness under conditions of low signal-to-noise ratio.
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