Robust Clutter Suppression and Radial Velocity Estimation for High-Resolution Wide-Swath SAR-GMTI
Moving targets are usually smeared and imaged at incorrect positions in synthetic aperture radar (SAR) images due to the target motions during the illumination time. Moreover, a moving target will cause multiple artifacts in the reconstructed image since pulse repetition frequency (PRF) operated in...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-03-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/7/1555 |
| _version_ | 1797437889960738816 |
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| author | Zhenning Zhang Weidong Yu Mingjie Zheng Liangbo Zhao Zi-Xuan Zhou |
| author_facet | Zhenning Zhang Weidong Yu Mingjie Zheng Liangbo Zhao Zi-Xuan Zhou |
| author_sort | Zhenning Zhang |
| collection | DOAJ |
| description | Moving targets are usually smeared and imaged at incorrect positions in synthetic aperture radar (SAR) images due to the target motions during the illumination time. Moreover, a moving target will cause multiple artifacts in the reconstructed image since pulse repetition frequency (PRF) operated in high-resolution wide-swath (HRWS) SAR is very low. In order to reliably indicate moving targets, a robust cancellation algorithm is derived in this paper for clutter suppression in multichannel HRWS SAR, which is free by velocity searching and covariance matrix estimation of clutter plus noise. The proposed multilayer channel-cancellation combined with the deramp processing is designed to sequentially suppress the seriously aliased clutter in HRWS SAR. Experimental results show that the proposed algorithm is efficient and robust in tough situations, and have a superior detection ability in weak targets and low-velocity targets. In addition, the radial velocity estimation algorithm combined with the channel cancellation is exploited to relocate moving targets. The effectiveness of the proposed algorithms is validated by actual spaceborne SAR data acquired by a coordination experiment with two controllable vehicles. |
| first_indexed | 2024-03-09T11:29:11Z |
| format | Article |
| id | doaj.art-14f7b4ee3f1148c3b162058cc7d03365 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T11:29:11Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-14f7b4ee3f1148c3b162058cc7d033652023-11-30T23:55:41ZengMDPI AGRemote Sensing2072-42922022-03-01147155510.3390/rs14071555Robust Clutter Suppression and Radial Velocity Estimation for High-Resolution Wide-Swath SAR-GMTIZhenning Zhang0Weidong Yu1Mingjie Zheng2Liangbo Zhao3Zi-Xuan Zhou4Department of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaDepartment of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaSchool of Electronics, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, ChinaInstitute of Remote Sensing Satellite, CAST, Beijing 100094, ChinaDepartment of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaMoving targets are usually smeared and imaged at incorrect positions in synthetic aperture radar (SAR) images due to the target motions during the illumination time. Moreover, a moving target will cause multiple artifacts in the reconstructed image since pulse repetition frequency (PRF) operated in high-resolution wide-swath (HRWS) SAR is very low. In order to reliably indicate moving targets, a robust cancellation algorithm is derived in this paper for clutter suppression in multichannel HRWS SAR, which is free by velocity searching and covariance matrix estimation of clutter plus noise. The proposed multilayer channel-cancellation combined with the deramp processing is designed to sequentially suppress the seriously aliased clutter in HRWS SAR. Experimental results show that the proposed algorithm is efficient and robust in tough situations, and have a superior detection ability in weak targets and low-velocity targets. In addition, the radial velocity estimation algorithm combined with the channel cancellation is exploited to relocate moving targets. The effectiveness of the proposed algorithms is validated by actual spaceborne SAR data acquired by a coordination experiment with two controllable vehicles.https://www.mdpi.com/2072-4292/14/7/1555deramphigh-resolution wide-swath (HRWS)ground moving target indication (GMTI)multilayer channel-cancellationradial velocitysynthetic aperture radar (SAR) |
| spellingShingle | Zhenning Zhang Weidong Yu Mingjie Zheng Liangbo Zhao Zi-Xuan Zhou Robust Clutter Suppression and Radial Velocity Estimation for High-Resolution Wide-Swath SAR-GMTI Remote Sensing deramp high-resolution wide-swath (HRWS) ground moving target indication (GMTI) multilayer channel-cancellation radial velocity synthetic aperture radar (SAR) |
| title | Robust Clutter Suppression and Radial Velocity Estimation for High-Resolution Wide-Swath SAR-GMTI |
| title_full | Robust Clutter Suppression and Radial Velocity Estimation for High-Resolution Wide-Swath SAR-GMTI |
| title_fullStr | Robust Clutter Suppression and Radial Velocity Estimation for High-Resolution Wide-Swath SAR-GMTI |
| title_full_unstemmed | Robust Clutter Suppression and Radial Velocity Estimation for High-Resolution Wide-Swath SAR-GMTI |
| title_short | Robust Clutter Suppression and Radial Velocity Estimation for High-Resolution Wide-Swath SAR-GMTI |
| title_sort | robust clutter suppression and radial velocity estimation for high resolution wide swath sar gmti |
| topic | deramp high-resolution wide-swath (HRWS) ground moving target indication (GMTI) multilayer channel-cancellation radial velocity synthetic aperture radar (SAR) |
| url | https://www.mdpi.com/2072-4292/14/7/1555 |
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