Open AccessSAR ground moving target's along‐track velocity estimation in the complex image domain via SoWVD
Author(s) -
Huang Zuzhen,
Ding Zegang,
Meng Canzhen,
Ge Yinchao
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2019.0450
Subject(s) - azimuth , clutter , synthetic aperture radar , computer science , moving target indication , track (disk drive) , computer vision , image (mathematics) , artificial intelligence , frequency domain , signal (programming language) , algorithm , radar , remote sensing , radar imaging , geology , pulse doppler radar , physics , optics , telecommunications , programming language , operating system
A ground moving target is always defocused in the synthetic aperture radar (SAR) image domain due to the along‐track velocity. In the image domain, a moving target's complex response along the azimuth direction can be modelled as a linear frequency‐modulated signal, therefore, its Doppler rate, as well as the along‐track velocity, can be estimated based on the recently proposed second‐order Wigner–Ville (SoWVD) distribution transform. The proposed method has a low computational complexity without the search procedure and can be well combined with the SAR ground moving target detection algorithms in image domain, where the signal to clutter‐plus‐noise ratio is higher than other domains. Finally, the effectiveness of this method is verified with some numerical experiments.