一种新的双孔径天线干涉SAR动目标检测方法

提出了一种基于双孔径天线沿航迹向干涉SAR进行动目标检测、测速及定位的新方法.该方法在分析杂波对消必要性的基础上,给出了进行地杂波对消、动目标检测、径向速度分量估计及定位的原理和实现方法.在恒虚警处理后,通过比较杂波对消后的残差图像与原始图像中运动目标和静止目标对消幅度的差异,检测出运动目标.同时,可以利用残差图象中杂波的对消特性进行运动目标径向速度的估算以及目标的定位.这种检测方法具有良好的杂波对消性能,能够完成被地面背景杂波掩盖的运动目标的检测、测速及定位.计算机仿真结果验证了其有效性.

A New Moving Target Detection Method Based on Dual-Aperture Antenna Interferometric SAR

In this paper,a new method of moving target detection,radial velocity estimation and relocation based on dual aperture antenna along track interferometric SAR is proposed.The principle and realization of clutter cancellation,moving target detection,radial velocity estimation and relocation are presented based on the analysis of clutter cancellation necessity.After constant false alarm rate(CFAR)processing,the moving targets are separated and the detection process is realized by comparing the cancellation extent between the residue SAR image and the original SAR image.In the meanwhile,the radial velocity estimation and relocation of moving targets can be performed by using the clutter cancellation characteristics of the residue SAR image.This method features significant clutter cancellation and can perform the detection,radial velocity estimation and relocation of moving targets masked by ground clutters.Simulation results show that the method proposed in this paper is effective.