复杂微动目标SAR仿真技术

摘要

针对基于微动特征提取的目标识别技术研究,提出了一种基于电磁散射计算的微动目标SAR回波仿真方法.该方法在完成雷达目标动态几何建模的基础上,结合目标高频电磁散射计算与距离频域回波模型,能够实现指定雷达视角和电磁参数条件下的微动复杂目标SAR回波仿真与图像模拟.结合实际情况,以螺旋桨飞机为例,研究了其SAR回波特性和成像特性,仿真结果表明该方法能够有效解决微动仿真问题.%Aiming at the research of target recognition technology based on micro-motion feature ex-traction,a new method based on electromagnetic scattering calculation is presented for SAR simulation of complex micro-motion target.On the basis of the complete dynamic geometric modeling of radar target, combined with high frequency electromagnetic scattering calculation and the echo model in the range-fre-quency domain,this method can achieve the SAR echo and image data in the case of specified radar view and electromagnetic parameters.The SAR echo and image characteristics for the propeller aircraft are stud-ied as a simulation example.The simulation results show that this method can effectively solve the problem of micro-motion simulation.