自适应交叉近似结合压缩感知快速求解电大目标宽角度电磁散射问题  

Application of adaptive cross approximation combined with compressed sensing to fast solution of electromagnetic scattering problems of electrically large objects over wide angles

作　　者：曹欣远[1] 陈明生[1] 孔勐[1] 张量[1] 程亮亮[1] 陈兵兵[1] 齐琦[1] 

机构地区：[1]合肥师范学院电子信息工程学院,安徽合肥230601

出　　处：《中国科学技术大学学报》2015年第4期302-307,共6页JUSTC

基　　金：国家自然科学基金(51477039;51207041);安徽省自然科学基金(1408085QF104);安徽省高校自然科学研究重点项目(KJ2014A206);安徽省学术与技术带头人科研活动经费资助

摘　　要：如何对宽角度激励下各类目标尤其是电大目标的电磁散射特性进行快速分析是计算电磁学一直以来的难点课题之一.为此提出一种自适应交叉近似结合压缩感知的新方案,利用压缩感知理论构建一种含多角度信息的新型电磁场激励,降低矩量法运算次数,以自适应交叉近似对阻抗矩阵进行低秩分解,进一步提高单次矩量法的计算效率,从而最终实现了对电大目标宽角度散射问题的快速求解.数值实验结果表明,该方案能在有效缩短运算时间的同时,依然确保计算结果的准确性.Fast analysis of electromagnetic scattering properties of various objects, especially e[ectrically large objects over a wide angle, is always a difficult problem in computational electromagnetics. A new solution using compressed sensing in conjunction with adaptive cross approximation was proposed, and a new incident source including different angle information was constructed based on compressed sensing theory, which could reduce the number of computation times for method of moments. Meanwhile, adaptive cross approximation technique was also introduced to method of moments to form a low rank

关 键 词：压缩感知 自适应交叉近似 电大目标 宽角度 矩量法 

分 类 号：TN953[电子电信—信号与信息处理]