Qi Yang, Bin Deng, Hongqiang Wang, Ye Zhang, Yuliang Qin,
https://www.spiedigitallibrary.org/journals/Journal-of-Electronic-Imaging/volume-27/issue-1/013009/Translation-compensation-and-micro-Doppler-extraction-for-precession-ballistic-targets/10.1117/1.JEI.27.1.013009.short?SSO=1
Imaging, classification, and recognition
techniques of ballistic targets in midcourse have always been the focus of
research in the radar field for military applications. However, the high
velocity translation of ballistic targets will subject range profile and
Doppler to translation, slope, and fold, which are especially severe in the
terahertz region. Therefore, a two-step translation compensation method based
on envelope alignment is presented. The rough compensation is based on the
traditional envelope alignment algorithm in inverse synthetic aperture radar
imaging, and the fine compensation is supported by distance fitting. Then, a
wideband imaging radar system with a carrier frequency of 0.32 THz is
introduced, and an experiment on a precession missile model is carried out.
After translation compensation with the method proposed in this paper, the
range profile and the micro-Doppler distributions unaffected by translation are
obtained, providing an important foundation for the high-resolution imaging and
micro-Doppler extraction of the terahertz radar.
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