二维海面上三维电大尺寸舰船目标电磁散射仿真

目标特征的建模、仿真和分析对于合成孔径雷达（SAR）基于图像的自动识别（ATR）系统具有重要的意义。研究了海面舰船目标的电磁散射计算以及雷达成像仿真。基于矩量法及其并行计算方法，对电大尺寸舰船目标及与海面复合的散射特性进行了研究，给出了不同频带、空间方位、极化的散射特性。在频域对回波数据作离散傅里叶逆变换，得到海面舰船目标的一维距离像。运用极坐标格式成像算法得到其二维聚束SAR成像结果，清晰地重构目标的轮廓。

Simulation of electromagnetic scattering from 2D sea surface with 3D electrically large ship target

The modeling, simulation and analysis of target features are of great significance for synthetic aperture radar (SAR) image-based automatic recognition (ATR) systems. The electromagnetic scattering calculation and radar imaging simulation of the surface ship target are studied. Based on the method of moment method and its parallel computation, the scattering characteristics of electrically large ship targets and sea surface composites are studied, and the scattering characteristics of different frequency bands, incident and sca-ttering directions and polarizations are given. The inverse Fourier transform of the echo data is performed in the frequency domain to obtain a 1D high resolution range profiles of the ship target. The polar coordinate format imaging algorithm is used to obtain the 2D spotlight SAR imaging results, and the contour of the target is reconstructed clearly.