一种基于子孔径SAR的地面运动目标检测方法  

A Sub-aperture SAR based GMTI method

作　　者：王金峰[1] 邓海涛[1] 

机构地区：[1]华东电子工程研究所,安徽合肥230088

出　　处：《微型机与应用》2015年第20期9-11,共3页Microcomputer & Its Applications

摘　　要：针对UHF波段运动目标检测中信号弱、杂波展宽严重等问题,提出一种基于子孔径SAR技术的杂波抑制方法。首先通过SAR成像实现运动目标的粗聚焦,再通过距离-方位拓展局部STAP实现杂波抑制,避免了运动目标越距离单元和方位散焦带来的信号损失。最后,通过仿真结果验证了算法的有效性。In the Ultra-High Frequency（UHF） band Synthetic Aperture Radar/Ground Moving Target Indication（SAR/GMTI）system, the signal of moving target is weak, while the clutter is widely spread in the Doppler field. So it is difficult to indicate the moving targets, especially the slower ones. In this paper, a clutter suppression method is proposed, which is based on the sub-aperture SAR. In this method, firstly, the moving target is roughly focused. Then the clutter is suppressed through the local spacetime adaptive processing（STAP）, which is formulated by extending in range and azimuth. With the extension, the losses of the signal due to range cell walk and the de-focusing in azimuth are both avoided. Finally, the method is validated trough simulation.

关 键 词：地面运动目标指示 空时自适应处理 子孔径 杂波抑制 

分 类 号：TN959.1[电子电信—信号与信息处理]