29 April 2009 3D SAR image formation for underground targets using ultra-wideband (UWB) radar
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Abstract
This paper analyzes the application of ultra-wideband ground-penetrating radar (GPR) in a down-looking configuration for the detection of buried targets. As compared to previous studies, where target detection algorithms have been developed based on the radar range profiles alone (pre-focus data), we investigate the potential performance improvement by forming synthetic aperture radar (SAR) images of the targets. This becomes important in scenarios with small signal-to-noise or signal-to-clutter ratios. Our three-dimensional (3-D) image formation algorithm is based on the backprojection technique. We apply this method to radar scattering data obtained through computer simulation by the finite-difference time-domain (FDTD) technique. Our analysis demonstrates the advantages of using focused SAR images versus the pre-focus range profiles. We also perform a parametric study of several physical factors that could affect the image quality.
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Lam Nguyen, Traian Dogaru, Roberto Innocenti, "3D SAR image formation for underground targets using ultra-wideband (UWB) radar", Proc. SPIE 7308, Radar Sensor Technology XIII, 73081F (29 April 2009); doi: 10.1117/12.829631; https://doi.org/10.1117/12.829631
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