面向目标特性精细提取的SAR数据融合成像处理方法

杨威; 陈杰; 李春升

doi:10.12000/JR15017

面向目标特性精细提取的SAR数据融合成像处理方法

DOI: 10.12000/JR15017

(北京航空航天大学电子信息工程学院北京 100191)

基金项目:

国家自然科学基金重点项目(61132006)资助课题

详细信息

作者简介:
杨威(1983-)，男，湖北宜昌人，博士，北京航空航天大学信号与信息处理专业，主要从事星载SAR高分辨率雷达信号仿真与成像技术、新体制雷达技术的研究。E-mail:yangweigigi@ee.buaa.edu.cn 陈杰(1973-)，教授、博士生导师，长期从事高分辨率微波遥感信息系统理论与方法研究。2005年获得北京市高等教育成果二等奖，2006年入选教育部“新世纪优秀人才支持计划”，2008年获霍英东教育基金会第十一届高等院校青年教师奖三等奖。承担国家自然科学基金、“973”计划、“863”计划、国家重大专项等多项课题。已发表论文100余篇，其中SCI(E)检索15篇，EI检索80余篇。申请国家发明专利20余项，合作编写教材4部，合作出版译著1部。李春升(1963-)，男，天津人，北京航空航天大学，教授，博士生导师，主要从事星载SAR系统总体与仿真、多源遥感图像信息融合、信息获取与处理等方面的研究工作。E-mail:lichunsheng@buaa.edu.cn

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出版历程
- 收稿日期: 2015-01-26
- 修回日期: 2015-03-24
- 网络出版日期: 2015-02-28

SAR Data Fusion Imaging Method Oriented to Target Feature Extraction

(School of Electronics and Information Engineering, Beihang University , Beijing 100191, China)

摘要

摘要: 针对当前高分辨率星载SAR数据处理忽略目标相关散射特性随方位角变化而导致目标轮廓细节难以精细提取的问题，该文提出了一种面向目标特性精细提取的融合成像处理方法。首先，分析高分辨率条件下影响目标特性提取和SAR图像质量的因素，如轨道非线性、停-走模型、大气延时、高阶残留相位误差等，并提出针对性的补偿方法。在此基础上，建立基于目标时空谱特性的回波数学信号模型，解析目标散射特性时-空-频的变化规律，提出针对高分辨率、超大方位观测角范围的融合成像处理策略和方法，在距离-多普勒域、图像域通过融合处理提升SAR图像的品质。最后，通过对典型军事目标的仿真和成像处理，验证所提方法的有效性。
- 星载SAR /
- 目标特性 /
- 高分辨率 /
- 融合成像
Abstract: To deal with the difficulty for target outlines extracting precisely due to neglect of target scattering characteristic variation during the processing of high-resolution space-borne SAR data, a novel fusion imaging method is proposed oriented to target feature extraction. Firstly, several important aspects that affect target feature extraction and SAR image quality are analyzed, including curved orbit, stop-and-go approximation, atmospheric delay, and high-order residual phase error. Furthermore, the corresponding compensation methods are addressed as well. Based on the analysis, the mathematical model of SAR echo combined with target space-time spectrum is established for explaining the space-time-frequency change rule of target scattering characteristic. Moreover, a fusion imaging strategy and method under high-resolution and ultra-large observation angle range conditions are put forward to improve SAR quality by fusion processing in range-doppler and image domain. Finally, simulations based on typical military targets are used to verify the effectiveness of the fusion imaging method.
- Space-borne SAR /
- Target feature /
- High-resolution /
- Fusion imaging

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参考文献(17)

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