【作者】 曹晓乐； 许小剑；

【Author】 CAO Xiaole;XU Xiaojian;School of Electronics and Information Engineering,Beihang University;

【机构】 北京航空航天大学电子信息工程学院；

【摘要】 本文提出了一种地面建筑物的合成孔径雷达(Synthetical aperture radar,SAR)图像快速仿真模型,利用该模型得到的SAR图像可以逼真地展现出地面典型建筑物的电磁散射特性.分析了矩形、L形及圆柱形三种典型建筑物的雷达成像散射机理,重点分析了"地面-墙面"间的多次散射及其雷达成像的表现形式,引入角反射器散射模型,计入地物表面粗糙度和介电常数等因素对多次散射强度的影响,并由此得到典型建筑物墙面之间、墙面与地面之间耦合散射计算的解析表达式,进而实现典型建筑物SAR图像的快速仿真.更多还原

【Abstract】 In this paper,fast simulation models are proposed for synthetic aperture radar(SAR) images of typical buildings on the ground,and the results represents the electromagnetic(EM) scattering characteristics of typical buildings with high fidelity.We study the radar image scattering mechanisms of flat-roofed rectangular,L-shaped and columnar buildings,and analyze the phenomenological characteristics of the SAR images for the multiple scattering among walls and the ground.Scattering models of corner reflectors are introduced,and the impacts related to the roughness and the dielectric constant of the objects surface are taken into account.Analytical expressions are proposed to represent the multiple scattering images for flat-roofed rectangular,L-shaped and columnar buildings for high fidelity SAR simulation.更多还原