基于表面电流的粗糙面上方圆柱距离像仿真

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。

Range profile analysis of target above rough surface based on surface current model

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 solution of the composite scattering from the two-dimension perfect electric conductor column target above a rough surface.By calculating the radiation of the surface currents 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 performing the inverse discrete Fourier transform on the wideband backscattered field.Combining the surface current decomposition and the ray theory prediction techniques,the connection between the simulated range profiles and the complex scattering mechanisms are established.The cause of the HRRP is identified and the different order coupling interactions give rise to different order range profiles.