{"title":"Two Dimensional Resolution Equalization Method in Image Domain for Airborne Multi-static SAR","authors":"Fanyun Xu, Yulin Huang, Yin Zhang, Yongchao Zhang, Junjie Wu, Jianyu Yang","doi":"10.1109/APSAR46974.2019.9048280","DOIUrl":null,"url":null,"abstract":"The resolution of bistatic SAR system is constrained by the signal bandwidth, distance, velocity and bistatic radar angle. The influence of topology structures and the strong coupling of echoes greatly limit the resolution of SAR images. And the problem of unbalanced two dimensional resolution brings difficulty and challenge to the target detection and recognition. Multi-static SAR can naturally form multiple pairs of bistatic SAR system and it fuses image information from multi-view by the design of topology structure to improve imaging resolution. To achieve optimal spatial resolution in all directions, the typical multi-static SAR geometric model is presented and the influence of topology structure on the two-dimensional resolution of bistatic and multi-static SAR is analyzed in this paper. Then, an equalization method to improve resolution for multi-static SAR is proposed. Finally, the simulation results validate the effectiveness of the proposed method.","PeriodicalId":377019,"journal":{"name":"2019 6th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2019 6th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APSAR46974.2019.9048280","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3
Abstract
The resolution of bistatic SAR system is constrained by the signal bandwidth, distance, velocity and bistatic radar angle. The influence of topology structures and the strong coupling of echoes greatly limit the resolution of SAR images. And the problem of unbalanced two dimensional resolution brings difficulty and challenge to the target detection and recognition. Multi-static SAR can naturally form multiple pairs of bistatic SAR system and it fuses image information from multi-view by the design of topology structure to improve imaging resolution. To achieve optimal spatial resolution in all directions, the typical multi-static SAR geometric model is presented and the influence of topology structure on the two-dimensional resolution of bistatic and multi-static SAR is analyzed in this paper. Then, an equalization method to improve resolution for multi-static SAR is proposed. Finally, the simulation results validate the effectiveness of the proposed method.
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