EPILE结合(G)FBM研究粗糙面与多目标复合电磁散射及其参数化特征分析

Applying the Extended Propagation-Inside-Layer Expansion combined with the Forward-Backward Method (EPILE+FBM)and the Extended Propagation-Inside-Layer Expansion combined with the Generalized Forward-Backward Method (EPILE+GFBM), the composite electromagnetic scattering problem from rough ground /sea surface and multi-targets will be researched. The multiple composite sense of rough ground / sea surface and multi-targets will be modeled reasonably, the expressions of integral equation, scattering field and coefficient will be built, the accuracy, complexity and computational efficiency for the algorithms will be discussed, the results of the rough ground / sea surface and multi-targets composite scattering under different incident angle, different frequency, different target position and posture, and different roughness, etc, will be investigated, and the typical characteristic will be analysed. Basing on the understanding of coupling scattering mechanism from the rough surface and multiple targets, we respect to propose the feasible measure in improving the analysis of composite scattering and the understanding of regularity on clutter extacting and target guidance.

采用扩展传播内层展开结合前后向迭代法(EPILE+FBM)、扩展传播内层展开结合广义前后向迭代法(EPILE+GFBM)研究粗糙地海面与多目标复合电磁散射问题。对粗糙地海面与多目标的多类复合场景进行合理建模，建立复合散射多个积分方程和散射场及系数的表达式，对算法的准确度、复杂度、计算效率等性能进行探讨，研究不同入射角、不同频率、不同目标位置和姿态、以及不同粗糙度等参数时的粗糙地海面与多目标复合电磁散射，并对其典型特征进行分析。在理解粗糙面与多目标耦合散射机理基础上，有望提出改善复合散射分析的可行性措施与杂波提取及目标制导的规律性认识。

基于电磁场边界条件、波动方程和Ewald-Oseen消光定理等，建立了粗糙面（高斯谱、PM谱）与多类目标复合场景、复合散射积分方程，采用EPILE结合(G)FBM算法展开其电磁散射的研究，得到代表各散射感应成分的阵元、本征阵、前后向感应未知量的表达式，为验证算法的准确度和效率，推导出迭代余量残差和计算复杂度的表达式，并与传统精确电磁算法-矩量法进行了对比，进而针对不同目标尺寸、不同粗糙面粗糙度（均方根高度、风速等）、不同目标位置、不同入射角、不同目标倾斜姿态角等多参数下的结果进行了研究，得到造成不同现象的规律性结论。基于取得的研究结果，撰写并发表了学术论文，参加了国际学术交流，获得了论文奖，证实项目相关研究内容得到了本领域国际同行专家学者的认可。