基于电磁散射的复杂目标SAR回波与图像仿真

复杂目标的SAR图像仿真技术，对于目标识别与解译研究具有重要意义。该文提出的仿真算法，从目标的3维模型出发，运用弹射线原理，通过仿真全方位，全频带的目标散射系数来构建回波并成像。改传统平面波入射为球面波入射，使得算法不仅能够仿真远场成像系统，也适用于近场仿真成像。标准体实验，验证了算法的近远场，全极化，多角度，宽频带的仿真能力；复杂目标的仿真结果，同实测数据相比十分逼真。

SAR Echo and Image Simulation of Complex Targets Based on Electromagnetic Scattering

SAR image simulation of complex target is very important to radar target recognition and SAR image interpretation. In this paper, the raw echo is simulated by assembling scattering coefficients of the target, under the different aspect and frequency. These coefficients are obtained by applying shooting and bouncing rays technology onto the target’s 3D model. Via improving the traditional assumption of incident plane wave as the spherical wave, the algorithm is extended to be suitable for the near-field condition, as well as the far-field. Standard target experiment validate the algorithm can simulate full polarimetry, multiple aspect and wide bandwidth SAR echo. The simulated images of complex targets are very similar to the real data.