摘要
在矩量法和物理光学混合算法的框架内,引入矩阵压缩技术提高计算效率,降低计算机内存需求,实现粗糙面上方二维导电圆柱宽带复合电磁散射建模。通过求解复合模型表面电流在频域仿真回波信号,结合傅里叶逆变换(IDFT)获取粗糙面环境下圆柱的高分辨一维距离像(HRRP),实现了粗糙面上方目标HRRP特性仿真与分析。采用定量与定性的综合分析手段,结合表面电流分解与射线路径相位预估,揭示了目标与粗糙面之间复杂电磁耦合机理与作用过程,明确了HRRP各峰值形成的来源,定量研究了各阶耦合相互作用回波对雷达成像的贡献。
Combined the method of moment and the physical optics method with the matrix decomposition technique, a hybrid method is applied in this paper for the so- lution of the composite scattering from the two-dimension perfect electric conductor column target above a rough surface. By calculating the radiation of the surface cur- rents and simulating the radar echoes in the frequency domain, the high resolution range profiles（HRRP） of the column above a rough surface are obtained by per- forming the inverse discrete Fourier transform on the wideband backscattered field. Combining the surface current decomposition and the ray theory prediction tech- niques, the connection between the simulated range profiles and the complex scat- tering mechanisms are established. The cause of the HRRP is identified and the dif- ferent order coupling interactions give rise to different order range profiles
出处
《电波科学学报》
EI
CSCD
北大核心
2011年第3期431-436,共6页
Chinese Journal of Radio Science
基金
国家自然科学基金资助(No.61001059)
中国博士后科学基金资助
中央高校基本科研业务费专项资金资助
关键词
距离像
目标与粗糙面
耦合相互作用
电磁建模
range profiles
target and rough surface scattering
coupling interactions
electromagnetic simulation
