复杂目标散射中心正向建模数据分析

Analysis of Forward Modeling of Complex Target Scattering Center

高分辨率雷达目标识别技术能够有效获取复杂目标信息。提出了基于几何CAD模型的复杂雷达目标参数散射中心模型的分析方法。该方法完全脱离SAR图像,紧扣目标的几何及物理性质。基于复杂目标散射中心的正向建模方法,确定了散射体的幅值、频率依赖参数、散射类型、位置以及长度等参数。基于VS2010平台完成散射中心参数管理软件设计,将各个离散姿态下获取的散射中心数据汇总和归类,完成复杂目标的参数化重构SAR成像。从目标几何特征出发,对复杂目标进行部件分解,借助射线追踪的方法,对射线经过的路径进行分集,可以将不同部件的散射贡献区分开,精确反映复杂目标的散射来源和散射机理。文中的算例说明了复杂目标散射中心正向建模的合理性。

High-resolution target recognition technology can effectively obtain complex target information. This paper presents a forward approach for establishing complex radar target parameters scattering center model based on geometric CAD model. The method is completely out of SAR images,closely related to the geometric and physical properties of the target. A forward approach for modeling of complex target scattering center is developed to determine the scattering type,position and length. The design of the software of scattering center parameter management software is completed based on the VS2010 platform. The forward modeling method of complex target scattering center,starting from the target geometric features,decomposes the target components by ray tracing method and diversifies the paths of the rays,so that the scattering contributions of different components can be distinguished to accurately reflect the complex targets. The examples and analysis of this paper illustrate the rationality of forward modeling of complex target scattering centers.