基于方位去斜的SAR/GMTI方法研究  

A method of SAR/GMTI based on dechirp imaging

作　　者：龚紫翼 王万林[1] GONG Ziyi;WANG Wanlin(China Academy of Space Technology(Xi’an),Xi’an 710000,China)

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《空间电子技术》2021年第3期21-30,共10页Space Electronic Technology

摘　　要：具有同时获取静止场景高分辨率图像和检测慢速运动目标能力,是多通道SAR/GMTI雷达优于传统单通道SAR和预警雷达的重要特征之一。文章采用基于方位去斜SAR成像技术的三通道SAR/GMTI方法对地面运动目标进行检测、定位和测速,着重研究了一种结合相位补偿、图像配准和多通道多像素自适应处理的杂波抑制方法。分别在有无配准误差情况下,对比了自适应处理与直接对消方法的杂波抑制效果,说明了多消一的自适应处理针对配准误差具有更好的稳健性。最后利用对三通道SAR/GMTI系统实测数据的处理,验证了所述方法流程的可行性。The reason why multi-channel SAR/GMTI radar is superior to traditional single-channel SAR and early warning radar is that it has the ability to simultaneously acquire high-resolution images of stationary scenes and detect slow moving targets.In this paper,a three-channel SAR/GMTI method based on Dechirp SAR imaging technology is used to detect,locate the ground moving targets and measure the velocity of them.This paper focuses on a method that combines phase compensation,image registration and multi-channel multi-pixel adaptive processing Clutter suppression.In the presence and absence of registration errors,the clutter suppression results of adaptive processing and direct methods are compared,which shows that the adaptive processing is more robust than the direct method against registration errors.The feasibility is verified by processing the measured data of the three-channel SAR/GMTI system.

关 键 词：地面运动目标检测 方位去斜 相位补偿 图像配准 多通道多像素自适应处理 

分 类 号：TN957.52[电子电信—信号与信息处理]