SAR图像动目标特性分析及仿真

SAR动目标特性及原始回波的仿真研究是SAR研究领域的一个热点。文中分析了运动目标参数以及波长和多普勒带宽对运动目标成像的影响,提出了一种分别使用RTPC方法和改进2D FFT方法仿真动目标和场景目标的SAR原始回波信号合成方法。经过对多波段和对应不同多普勒带宽的运动点目标进行仿真和成像,所得结果和理论分析相符,验证了理论分析的正确性。通过对合成目标的仿真和成像,点目标在背景中的位置符合预定要求,而且其中动目标参数对成像造成的影响符合理论分析,验证了该方法的有效性。

Characteristic Analysis and Simulation of SAR Moving Targets

SAR moving target characteristic research and raw echo simulation have become hotspots in SAR area. This paper analyzes the influences of moving target parameters, the signal wavelength, and Doppler bandwidth on the moving target imaging. And it presents a SAR simulation method of the compound targets including the moving targets and the immovable targets, which uses RTPC method and improved 2DFFT method to respectively simulate the moving targets and the background targets. Through the simulation and imaging of the point target in the case of different wave bands and different Doppler bandwidths, the experimental result is the same as the theoretical analysis, so the result is reliable. Though the simulation and imaging of the compound targets, the coordinate of the point targets in the background accords with the anticipation and the influence of the moving target parameters also accords with the theoretical analysis, which validates the availability of this method.