AN IMPROVED SAR-GMTI METHOD BASED ON EIGEN-DECOMPOSITION OF THE SAMPLE COVARIANCE MATRIX  

作　　者：Tian Bin Zhu Daiyin Zhu Zhaoda 

机构地区：[1]College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

出　　处：《Journal of Electronics(China)》2010年第3期382-390,共9页电子科学学刊（英文版）

基　　金：Supported by the Aviation Science Fund (No. 20080152004);China Postdoctoral Foundation (No. 20090461119)

摘　　要：An improved two-channel Synthetic Aperture Radar Ground Moving Target Indication (SAR-GMTI) method based on eigen-decomposition of the covariance matrix is investigated. Based on the joint Probability Density Function (PDF) of the Along-Track Interferometric (ATI) phase and the similarity between the two SAR complex images, a novel ellipse detector is presented and is applied to the indication of ground moving targets. We derive its statistics and analyze the performance of detection process in detail. Compared with the approach using the ATI phase, the ellipse detector has a better performance of detection in homogenous clutter. Numerical experiments on simulated data are presented to validate the improved performance of the ellipse detector with respect to the ATI phase approach. Finally, the detection capability of the proposed method is demonstrated by measured SAR data.An improved two-channel Synthetic Aperture Radar Ground Moving Target Indication （SAR-GMTI） method based on eigen-decomposition of the covariance matrix is investigated. Based on the joint Probability Density Function （PDF） of the Along-Track Interferometric （ATI） phase and the similarity between the two SAR complex images, a novel ellipse detector is presented and is applied to the indication of ground moving targets. We derive its statistics and analyze the performance of detection process in detail. Compared with the approach using the ATI phase, the ellipse detector has a better performance of detection in homogenous clutter. Numerical experiments on simulated data are presented to validate the improved performance of the ellipse detector with respect to the ATI phase aDDroach. Finally. the detection capabilitv of the proposed method is demonstrated bv measured S A R data.

关 键 词：Ground moving target indication Sample covariance matrix Eigen-decomposition Ellipse detector 

分 类 号：TN957[电子电信—信号与信息处理]