Modified imaging method for high resolution wide swath spaceborne SAR based on nonuniform azimuth sampling

Zhirong Men, Pengbo Wang, Chunsheng Li
{"title":"Modified imaging method for high resolution wide swath spaceborne SAR based on nonuniform azimuth sampling","authors":"Zhirong Men, Pengbo Wang, Chunsheng Li","doi":"10.1109/APSAR.2015.7306245","DOIUrl":null,"url":null,"abstract":"With the increasing demands for higher resolution and wider swath in many applications of Synthetic Aperture Radar (SAR), sliding spotlight mode has been presented. Here the antenna pattern is steered towards a fixed point to increase the synthetic aperture length and consequently in a better resolution. Currently, the image processing algorithms for sliding spotlight mode are almost based on the equivalent slant range model (ESRM). A great challenge has to be faced in signal processing of sliding spotlight mode. The ESRM, which is used for signal processing, may cause a Doppler parameter mismatch phenomenon and making an image quality decline at the edge of the scene when the swath coverage gets larger. In this paper, a modified imaging method based on nonuniform azimuth sampling is presented. First, a nonuniform azimuth sampling method is developed to compensate the Doppler parameter mismatch phenomenon. Second, a modified imaging method is proposed. Simulations are performed to validate the presented algorithm.","PeriodicalId":350698,"journal":{"name":"2015 IEEE 5th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2015-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2015 IEEE 5th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APSAR.2015.7306245","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1

Abstract

With the increasing demands for higher resolution and wider swath in many applications of Synthetic Aperture Radar (SAR), sliding spotlight mode has been presented. Here the antenna pattern is steered towards a fixed point to increase the synthetic aperture length and consequently in a better resolution. Currently, the image processing algorithms for sliding spotlight mode are almost based on the equivalent slant range model (ESRM). A great challenge has to be faced in signal processing of sliding spotlight mode. The ESRM, which is used for signal processing, may cause a Doppler parameter mismatch phenomenon and making an image quality decline at the edge of the scene when the swath coverage gets larger. In this paper, a modified imaging method based on nonuniform azimuth sampling is presented. First, a nonuniform azimuth sampling method is developed to compensate the Doppler parameter mismatch phenomenon. Second, a modified imaging method is proposed. Simulations are performed to validate the presented algorithm.
基于非均匀方位角采样的高分辨率宽幅星载SAR改进成像方法
随着合成孔径雷达(SAR)应用中对更高分辨率和更宽波段的要求越来越高,滑动聚焦模式应运而生。在这里,天线方向图被导向一个固定点,以增加合成孔径长度,从而获得更好的分辨率。目前,滑动聚焦模式的图像处理算法几乎都是基于等效倾斜距离模型(ESRM)。滑动聚焦模式的信号处理面临着很大的挑战。ESRM用于信号处理,当条带覆盖范围增大时,可能会导致场景边缘多普勒参数失配现象,使图像质量下降。本文提出了一种改进的基于非均匀方位角采样的成像方法。首先,提出了一种补偿多普勒参数失配现象的非均匀方位采样方法。其次,提出了一种改进的成像方法。仿真验证了所提算法的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信