一种基于散焦偏移差的全带宽机载SAR动目标检测方法  

An Airborne Single-channel SAR-GMTI Method Based on Defocusing Shifted Difference

作　　者：许睿鹏[1,2,3] 仇晓兰[1,3] 胡东辉[1,3] 丁赤飚[1,3] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100190 [3]中国科学院空间信息处理与应用系统技术重点实验室,北京100190

出　　处：《电子与信息学报》2010年第10期2336-2341,共6页Journal of Electronics & Information Technology

摘　　要：该文分析了斜视下的动目标特性,在深入研究目标偏移量与多普勒参数间相互关系的基础上,提出了一种基于散焦偏移差的全带宽单通道机载合成孔径雷达动目标检测方法,该方法利用动/静目标存在多普勒中心频率差时,调频率偏差会引起动/静目标产生不同偏移量的特点,分离动/静目标。与传统的单通道检测方法相比,该方法具有更强的动目标检测能力、不受斜视角限制的特点。This paper analyzes the character of moving targets,studies deeply the relationship of Doppler parameters and target shift.A single-channel SAR-GMTI method based on target defocusing shifted difference is proposed.This method employs the character to separate moving targets from stationary.The character is that the azimuth mismatch filter performs compression,it induces shifted difference between the stationary and moving targets because of having different Doppler center.Compare with traditional methods,it is applicable to low and high squint case and the detection ability is significantly improved.

关 键 词：合成孔径雷达 动目标检测 散焦 偏移差 

分 类 号：TN953[电子电信—信号与信息处理]