Zheng Hai-tao, Liao Shiyong, D. James, Sun Houjun, Liu Xiaoguang
{"title":"多层介质合成孔径雷达成像的扩展Omega-k算法","authors":"Zheng Hai-tao, Liao Shiyong, D. James, Sun Houjun, Liu Xiaoguang","doi":"10.11972/J.ISSN.1001-9014.2020.03.017","DOIUrl":null,"url":null,"abstract":"Processing ground penetrating radar data to obtain well-focused images for object detection has been an active research area. Phase-shift migration(PSM)is a widely used method since it allows the wave velocity to vary with respect to multi-layer medium. However,this requires pixel-by-pixel calculation of the image,which is time-consuming. This paper presents an extended Omega-k algorithm for multi-layer medium imaging with signif⁃ icantly less computation complexity than the PSM algorithm. The extended Omega-k exploits fast interpolation in the wave-number domain instead of iterative calculating as done by PSM. The method of estimating the wave propagation velocity in different media is also proposed via vertex region extraction for phase compensation and image focusing. Various images of buried targets of a two-layer medium experiment are obtained,which validate the effectiveness of the proposed algorithm,and make it practical for some typical ground-based surveillance ap⁃ plications.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"39 1","pages":"381"},"PeriodicalIF":0.6000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Extended Omega-k algorithm for synthetic aperture radar imaging in multi-layer medium\",\"authors\":\"Zheng Hai-tao, Liao Shiyong, D. James, Sun Houjun, Liu Xiaoguang\",\"doi\":\"10.11972/J.ISSN.1001-9014.2020.03.017\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Processing ground penetrating radar data to obtain well-focused images for object detection has been an active research area. Phase-shift migration(PSM)is a widely used method since it allows the wave velocity to vary with respect to multi-layer medium. However,this requires pixel-by-pixel calculation of the image,which is time-consuming. This paper presents an extended Omega-k algorithm for multi-layer medium imaging with signif⁃ icantly less computation complexity than the PSM algorithm. The extended Omega-k exploits fast interpolation in the wave-number domain instead of iterative calculating as done by PSM. The method of estimating the wave propagation velocity in different media is also proposed via vertex region extraction for phase compensation and image focusing. Various images of buried targets of a two-layer medium experiment are obtained,which validate the effectiveness of the proposed algorithm,and make it practical for some typical ground-based surveillance ap⁃ plications.\",\"PeriodicalId\":50181,\"journal\":{\"name\":\"红外与毫米波学报\",\"volume\":\"39 1\",\"pages\":\"381\"},\"PeriodicalIF\":0.6000,\"publicationDate\":\"2020-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"红外与毫米波学报\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.11972/J.ISSN.1001-9014.2020.03.017\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"OPTICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"红外与毫米波学报","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.03.017","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"OPTICS","Score":null,"Total":0}
Extended Omega-k algorithm for synthetic aperture radar imaging in multi-layer medium
Processing ground penetrating radar data to obtain well-focused images for object detection has been an active research area. Phase-shift migration(PSM)is a widely used method since it allows the wave velocity to vary with respect to multi-layer medium. However,this requires pixel-by-pixel calculation of the image,which is time-consuming. This paper presents an extended Omega-k algorithm for multi-layer medium imaging with signif⁃ icantly less computation complexity than the PSM algorithm. The extended Omega-k exploits fast interpolation in the wave-number domain instead of iterative calculating as done by PSM. The method of estimating the wave propagation velocity in different media is also proposed via vertex region extraction for phase compensation and image focusing. Various images of buried targets of a two-layer medium experiment are obtained,which validate the effectiveness of the proposed algorithm,and make it practical for some typical ground-based surveillance ap⁃ plications.