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3-D Object Imaging Method With Electromagnetic Vortex
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DOI：10.1109/TGRS.2021.3069914.png)
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Abstract
En 中文
The electromagnetic (EM) vortex imaging has demonstrated superior performance in target detection and imaging with azimuthal super-resolution. However, the restricted elevation resolution degrades the acquisition of target spatial information, which limits the development of the radar imaging technology based on orbital angular momentum (OAM). This article offers a solution to achieve the 3-D EM vortex imaging, by effectively utilizing relative motion between radar and target in the line-of-sight (LOS) direction. First, the forward-looking radar imaging scenario is presented, the 3-D echo model is derived, and the characteristics are analyzed as well. Second, the imaging method, based on the back-projection (BP) and spectrum estimation method, is proposed to obtain the targetx2019;s 3-D focused image. Furthermore, the influence factors about the elevation resolution are analyzed by the point spread function (PSF). Finally, simulations are carried out to verify the effectiveness of the theoretical analyses.
Keywords:
Imaging
Radar imaging
Image resolution
Azimuth
Radar tracking
Target tracking
Radar antennas
3-D forward-looking radar imaging
electromagnetic (EM) vortex imaging
orbital angular momentum (OAM)
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