地面车辆目标高质量SAR图像快速仿真方法  

Efficient Simulation Method for High Quality SAR Images of Complex Ground Vehicles

作　　者：董纯柱[1,2] 胡利平 朱国庆[1,2] 殷红成[1,2] 

机构地区：[1]电磁散射重点实验室,北京100854 [2]中国传媒大学信息工程学院,北京100024

出　　处：《雷达学报（中英文）》2015年第3期351-360,共10页Journal of Radars

基　　金：自然科学基金重大项目(61490695)资助课题

摘　　要：为满足基于模板的SAR地面车辆目标识别对海量高质量模板图像的工程应用需求,该文提出了一种基于射线追踪技术的SAR信号级高效仿真方法。该方法通过构建地面车辆目标SAR仿真场景物理模型并利用射线追踪方法准确模拟SAR探测过程中电磁波与场景中目标与环境的作用机理,实现对地面环境的宽带相干杂波、表面粗糙的复杂目标的宽带电磁散射以及地面-目标间耦合散射的快速计算,并通过SAR成像处理和图像相似度评估确认形成高质量SAR模板图像。数值结果验证了该文方法的准确性和高效性。Aiming at meeting the requirement of the amass high-quality SAR images needed by template-based ground target recognition engineering practice, a novel efficient SAR signal level simulation method is proposed. The electromagnetic scattering interaction mechanisms including coherent clutter of ground, multiple reflection and edge diffraction of vehicle, coupling-scattering between vehicle and ground are accurately estimated by utilizing an efficient ray-tracing technique. High quality SAR images are finally created through the SAR imaging procedure. Simulation results show that, the new method is feasible and effective.

关 键 词：电磁散射 SAR图像仿真 射线追踪技术 随机散射方法 图像评估 

分 类 号：TN958[电子电信—信号与信息处理]