A forward parametric modeling method is proposed to establish 3-D attributed scattering center (ASC) models for dynamic group targets. The main steps include computer-aided design (CAD) model component decomposition, occlusion analysis for group targets, selection of scattering sources, extracting scattering center parameters, and establishing ASC models for dynamic group targets. With the modeling method, the specular reflection scattering centers, multiple reflections scattering centers, and edge scattering centers can be automatically extracted from CAD model accurately. The method establishes the ASC model with 3-D length parameters to analyze the ASC distributions from a general case. To improve the efficiency of the modeling method, an improved octree structures based occlusion analysis method is proposed to reduce the times of occlusion judgments between targets. Based on the 3-D ASC model, an establishment method is proposed to analyze the time-varying scattering features for dynamic group targets. The establishment method analyzes the correlation of ASC parameters in the time domain and constructs ASC dataset to efficiently establish the time-varying ASC model. Finally, the results of simulation and measurement are analyzed to validate the effectiveness of the proposed method.

中文翻译：

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采用正向参数建模方法建立动态群目标的三维属性散射中心模型


提出了一种前向参数建模方法来建立动态群体目标的3D属性散射中心（ASC）模型。主要步骤包括计算机辅助设计（CAD）模型组件分解、群体目标遮挡分析、散射源选择、散射中心参数提取、建立动态群体目标ASC模型。通过该建模方法，可以从CAD模型中自动准确地提取镜面反射散射中心、多次反射散射中心和边缘散射中心。该方法建立了具有 3-D 长度参数的 ASC 模型，以分析一般情况下的 ASC 分布。为了提高建模方法的效率，提出一种改进的基于八叉树结构的遮挡分析方法，以减少目标之间的遮挡判断次数。基于3-D ASC模型，提出了一种分析动态群体目标时变散射特征的建立方法。该建立方法通过分析ASC参数在时域上的相关性并构建ASC数据集来高效地建立时变ASC模型。最后，对仿真和测量结果进行分析，验证了所提方法的有效性。