一种SAR/GMTI空频联合处理杂波抑制技术的研究

本文针对一种距离多普勒域沿迹干涉主瓣杂波抑制技术进行研究:首先指出本文研究方法与传统主瓣杂波抑制技术-DPCA-最大的不同在于前者是空频联合处理,后者是空时联合处理,并给出距离多普勒域沿迹干涉算法的空频二维滤波器形式;其次,本文分析了影响沿迹干涉法杂波抑制能力的固有相位补偿误差和通道匹配误差,并通过仿真分析了固有相位补偿误差和系统参数的关系;第三,本文研究了RDATI杂波抑制处理对运动目标回波的影响,运动目标保留程度与系统参数及目标参数的关系,为进一步检测运动目标、估计运动目标参数打下基础.

Research on a Space-Frequency Processing for SAR/GMTI

SAR/GMTI is one of the stresses in SAR field.Crucial technique for SAR/GMTI is s uppressing the main beam clutter,for the ground-moving target echo is often sh aded by main beam clutter (echo from stationary background).First we point out t he difference between clutter-suppression method studied (called RDATI) and the traditional SAR/GMTI algorithms (called DPCA),the former is space-frequency p r ocession and the latter is space-time procession.Space-Frequency filter for RD ATI is given out.Next we analyze the system parameters that will influence the c lutter residue after RDATI suppression.In the third part we analyze the principl e and the degree that moving targets echo can be retained after RDATI processio n.