单通道UWB SAR地面运动目标变化检测  

Ground Moving Target Detection in Single-Channel UWB SAR Using Change Detection Based on Sub-Aperture Images

作　　者：周红[1] 黄晓涛[1] 常玉林[1] 周智敏[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院超宽带室,湖南长沙410073

出　　处：《雷达科学与技术》2008年第1期23-28,共6页Radar Science and Technology

摘　　要：工作在VHF/UHF波段的超宽带合成孔径雷达(UWB SAR)具有叶簇穿透和高分辨成像的能力。文中提出了一种适合单通道UWB SAR的地面运动目标检测方法——基于子孔径图像变化检测的运动目标检测算法。该算法利用UWB SAR的大波束角特点,在方位向选取较大时间间隔的两个子孔径生成子孔径图像,并根据运动目标在不同子孔径图像上聚焦位置的差异检测运动目标,估计运动目标速度和位置。文中给出了该方法的原理、参数选择、实现步骤,并基于UWB SAR实测数据验证了所提方法的有效性。Ultra-wide band synthetic aperture radar（UWB SAR） operating in VHF/UHF band has the capabilities in foliage penetration and high resolution imaging. In this paper, we propose a new ground moving target detection method for single-channel UWB SAR using change detection based on sub aperture ima ges. This method exploits large beamwidth of UWB SAR to divide two sub-apertures with an interval of long time, thus a pair of sub-aperture images are formed. The moving target focuses on different positions in these images, which provides a distinguished feature to detect it and estimate its velocity and position precisely. The principle, parameter selection and realization procedure of the method are described and its effectiveness is proved by the UWB SAR real data.

关 键 词：超宽带合成孔径雷达 运动目标检测 子孔径成像 变化检测 

分 类 号：TN958[电子电信—信号与信息处理] TN959.1[电子电信—信息与通信工程]