为了满足基于模板的逆合成孔径雷达（ISAR）目标识别对海量高分辨模板图像的工程需求，提出了一种基于并行电磁散射特性计算技术的ISAR图像信号级仿真方法。首先，以OpenMP技术为基础采用并行物理光学和等效边缘电磁流对目标的电磁散射特性进行快速计算；其次，以步进频率波形为雷达发射波形结合目标的电磁散射特性生成了宽带雷达回波数据；最后，对使用距离多普勒算法对仿真回波数据进行处理生成ISAR像，并与点阵模型成像结果进行了对比分析。实现了对ISAR图像的信号级快速仿真，对ISAR系统设计与验证、ISAR图像解译和目标识别以及ISAR成像处理等具有重要意义。

Aiming at meeting the engineering demands for mass high resolution ISAR images by template-based target recognition, an efficient signal level ISAR simulation approach is proposed based on parallel computation technology of electromagnetism scattering. The electromagnetism scattering from target is calculated by the hybrid physical optics (PO) and equivalent edge current (EEC) method, which is accelerated with parallel computing technology based on OpenMP. Stepped frequency wave form (SWF) is chosen as the radar radiation wave form. With the data of electromagnetism scattering from target the wide-band echo is generated in stepped frequency wave form. Finally, the ISAR image is obtained using the Range-Doppler algorithm (RDA), and the difference from the ISAR image of scattered point model is analysed. The signal level ISAR imaging fast simulation is implemented in this approach, which is of important significance on the design and verification of ISAR system, the ISAR image interpretation and target recognition and the image processing.

TN955

国家自然科学基金资助项目；航空科学基金资助项目