基于图像质量度量准则的空间目标平动补偿

摘要

为了获得空间目标的微动信息,需要对雷达回波中的高速平动分量进行精确补偿.针对空间目标高速运动对微动信息提取的影响问题,首先分析了空间目标平动对微多普勒频率的调制影响,得到目标高速平动,特别是平动加速度、平动加加速度对微多普勒频率趋势性调制现象将干扰微多普勒频率提取的结论.在此基础上,利用目标平动直接导致目标多普勒频谱展宽的特点,提出了一种基于图像质量度量准则的空间目标平动参数估计方法,并根据估计出的平动参数实现运动补偿.最后,采用空间目标多散射中心模型,进行平动补偿分析,仿真结果验证了该方法的有效性.%In order to obtain the micro-Doppler information of space targets,the high-speed translational component of radar echoes needs to be compensated accurately.In regard to the problem of space target high-speed motion on the extraction of micro-motion information,the impact of micro-Doppler frequency modulated by space target translation is analyzed.High speed translation of targets,especially translational acceleration,which can directly lead to target Doppler spectral broadening characteristics,will interfere with the conclusion of the micro-Doppler frequency extraction.On the basis of this,a translational motion parameter estimation method based on image quality is proposed.Finally,the multi-scattering center model of space target is used to carry out translational compensation analysis.The simulation results verify the effectiveness of the method.