A Novel Detection Scheme in Image Domain for Multichannel Circular SAR Ground-Moving-Target Indication
Circular synthetic aperture radar (CSAR), which can observe the region of interest for a long time and from multiple angles, offers the opportunity for moving-target detection (MTD). However, traditional MTD methods cannot effectively solve the problem of high probability of false alarm (PFA) caused...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-03-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/7/2596 |
| _version_ | 1797437715296288768 |
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| author | Qinghai Dong Bingnan Wang Maosheng Xiang Zhongbin Wang Yachao Wang Chong Song |
| author_facet | Qinghai Dong Bingnan Wang Maosheng Xiang Zhongbin Wang Yachao Wang Chong Song |
| author_sort | Qinghai Dong |
| collection | DOAJ |
| description | Circular synthetic aperture radar (CSAR), which can observe the region of interest for a long time and from multiple angles, offers the opportunity for moving-target detection (MTD). However, traditional MTD methods cannot effectively solve the problem of high probability of false alarm (PFA) caused by strong clutter. To mitigate this, a novel, three-step scheme combining clutter background extraction, multichannel clutter suppression, and the degree of linear consistency of radial velocity interferometric phase (DLRVP) test is proposed. In the first step, the spatial similarity of the scatterers and the correlation between sub-aperture images are fused to extract the strong clutter mask prior to clutter suppression. In the second step, using the data remaining after elimination of the background clutter in Step 1, an amplitude-based detector with higher processing gain is utilized to detect potential moving targets. In the third step, a novel test model based on DLRVP is proposed to further reduce the PFA caused by isolated strong scatterers. After the above processing, almost all false alarms are excluded. Measured data verified that the PFA of the proposed method is only 20% that of the comparison method, with improved detection of slow and weakly moving targets and with better robustness. |
| first_indexed | 2024-03-09T11:26:37Z |
| format | Article |
| id | doaj.art-7582a8d703fb41bfa4277c250f038438 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T11:26:37Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-7582a8d703fb41bfa4277c250f0384382023-12-01T00:01:39ZengMDPI AGSensors1424-82202022-03-01227259610.3390/s22072596A Novel Detection Scheme in Image Domain for Multichannel Circular SAR Ground-Moving-Target IndicationQinghai Dong0Bingnan Wang1Maosheng Xiang2Zhongbin Wang3Yachao Wang4Chong Song5National Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaCircular synthetic aperture radar (CSAR), which can observe the region of interest for a long time and from multiple angles, offers the opportunity for moving-target detection (MTD). However, traditional MTD methods cannot effectively solve the problem of high probability of false alarm (PFA) caused by strong clutter. To mitigate this, a novel, three-step scheme combining clutter background extraction, multichannel clutter suppression, and the degree of linear consistency of radial velocity interferometric phase (DLRVP) test is proposed. In the first step, the spatial similarity of the scatterers and the correlation between sub-aperture images are fused to extract the strong clutter mask prior to clutter suppression. In the second step, using the data remaining after elimination of the background clutter in Step 1, an amplitude-based detector with higher processing gain is utilized to detect potential moving targets. In the third step, a novel test model based on DLRVP is proposed to further reduce the PFA caused by isolated strong scatterers. After the above processing, almost all false alarms are excluded. Measured data verified that the PFA of the proposed method is only 20% that of the comparison method, with improved detection of slow and weakly moving targets and with better robustness.https://www.mdpi.com/1424-8220/22/7/2596multichannel circular SARground-moving-target indication (GMTI)clutter suppressionalong-track interferometry (ATI)the heterogeneous clutter environment |
| spellingShingle | Qinghai Dong Bingnan Wang Maosheng Xiang Zhongbin Wang Yachao Wang Chong Song A Novel Detection Scheme in Image Domain for Multichannel Circular SAR Ground-Moving-Target Indication Sensors multichannel circular SAR ground-moving-target indication (GMTI) clutter suppression along-track interferometry (ATI) the heterogeneous clutter environment |
| title | A Novel Detection Scheme in Image Domain for Multichannel Circular SAR Ground-Moving-Target Indication |
| title_full | A Novel Detection Scheme in Image Domain for Multichannel Circular SAR Ground-Moving-Target Indication |
| title_fullStr | A Novel Detection Scheme in Image Domain for Multichannel Circular SAR Ground-Moving-Target Indication |
| title_full_unstemmed | A Novel Detection Scheme in Image Domain for Multichannel Circular SAR Ground-Moving-Target Indication |
| title_short | A Novel Detection Scheme in Image Domain for Multichannel Circular SAR Ground-Moving-Target Indication |
| title_sort | novel detection scheme in image domain for multichannel circular sar ground moving target indication |
| topic | multichannel circular SAR ground-moving-target indication (GMTI) clutter suppression along-track interferometry (ATI) the heterogeneous clutter environment |
| url | https://www.mdpi.com/1424-8220/22/7/2596 |
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