UWB叶簇覆盖SAR人造目标特征信号
UWB FOPEN SAR MAN-MADE TARGET SIGNATURE
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摘要: 穿透叶簇的VHF/UHF超宽带(UWB)SAR具有相对带宽很宽,积累角大的特点,能同时获得距离、方位两个方向的高分辨能力,用于探测地面隐蔽人造目标。在VHF/UHF低频段,一般的人造目标可简单模化为目标侧面与地面之间形成的一个长二面角。本文得出了二面角目标模型的散射回波信号形式,从理论上模拟产生了人造目标SAR图像,建立了特征信号库,可用于进一步的目标检测和识别。Abstract: Foliage penetrating (FOPEN) VHF/UHF SAR can image hidden man-made targets with wide-angle and ultra-wideband to achieve both range and azimuth with high resolutions. The target can be modeled by dihedral formed between its side and the ground due to the long wavelength of VHF/UHF. The paper provides the backscattering signal form of dihedral model, SAR image of man-made targets is simulated in theory and the signature library is formed which can be utilized in the subsequent stages of target detection and recognition.
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Allen M R, et al. FOPEN-SAR detection by direct use of simple scattering physics, in Algorithms for Synthetic Aperture Radar Imagery II,Dominick A. Giglio, Editor, Proc. SPIE 2487, 1995, 45-55.[2]Verly J G. Physical optics polarization scattering matrix for a right-angle dihedral. AD-A293036, 1995.[3][蒋咏梅.UWB叶簇覆盖SAR人造目标模型.技术报告,长沙:国防科技大学,1997.[4]张澄波. 综合孔径雷达--原理、系统分析与应用. 北京: 科学出版社,1989,80-86.[5] Novak L M, Chaney R D, Willsky A S. Coherent aspect-dependent SAR image formation, in Algorithms for Synthetic Aperture Radar Imagery, Dominick A. Giglio, editor, Proc. SPIE 2230, 1994,256-274.[5]Allen M R, Hoff L E. Wide-angle wideband SAR matched filter image formation for enhanced detection performance, in Algorithms for Synthetic Aperture Radar Imagery, Dominick A. G. editor, Proc. SPIE 2230, 1994, 302-314. -
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