高分辨SAR目标散射中心模型分析  

Analysis of Scattering Center Model for High Resolution SAR Targets

作　　者：张爱兵[1] 计科峰[1] 邹焕新[1] 丘昌镇[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《雷达科学与技术》2009年第6期416-424,共9页Radar Science and Technology

基　　金：武器装备预研基金

摘　　要：散射中心是光学区雷达目标电磁散射的基本特征,是高分辨SAR图像解译的根本特征。以高分辨SAR图像解译为应用背景,分析了目前典型的三种散射中心模型(理想点散射中心模型、衰减指数和模型、属性散射中心模型)的优缺点和适用条件,并导出了模型及模型参数间的关系。通过理论分析、仿真及实测SAR图像数据验证了属性散射中心模型是目前最符合高分辨SAR图像解译应用需求的散射中心模型。在此基础上,分析了属性散射中心的特性与特点,为研究基于属性散射中心模型的高分辨SAR图像特征提取及解译方法奠定了基础。Scattering center is the basic electromagnetic scattering characteristic of the targets in optical region and the essential feature for high resolution SAR imagery interpretation. In this paper, three typical scattering center models（ideal point scattering center model, damped exponential model, and attributed scattering center model） are analyzed for application to high resolution SAR imagery interpretation, with regard to their applicable conditions, advantages and disadvantages. Then the relationship of these three models and their corresponding parameters are derived. The theoretical analysis, simulated and measured SAR images all show that attributed scattering center model is better for high resolution SAR imagery interpretation. On this basis, the characteristics of the attributed scattering center are analyzed, which establishes the foundation for the next study of feature extracting and high resolution SAR imagery interpretation methods based on attribu- ted scattering center model.

关 键 词：合成孔径雷达 高分辨合成孔径雷达 SAR图像解译 散射中心 

分 类 号：TN957.51[电子电信—信号与信息处理] TN958[电子电信—信息与通信工程]