An Efficient Imaging Method for Medium-Earth-Orbit Multichannel SAR-GMTI Systems
Medium-Earth-orbit (MEO) synthetic aperture radar (SAR) has the advantages of short revisit time and wide coverage, and thus is a potential tool for implementing ground moving target indication (GMTI) tasks. In the paper, aiming at MEO SAR’s problems of low signal-to-noise ratio and limited computat...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/21/5453 |
| _version_ | 1797466637515882496 |
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| author | Yongkang Li Tianyu Huo Cuiqian Cao |
| author_facet | Yongkang Li Tianyu Huo Cuiqian Cao |
| author_sort | Yongkang Li |
| collection | DOAJ |
| description | Medium-Earth-orbit (MEO) synthetic aperture radar (SAR) has the advantages of short revisit time and wide coverage, and thus is a potential tool for implementing ground moving target indication (GMTI) tasks. In the paper, aiming at MEO SAR’s problems of low signal-to-noise ratio and limited computation resource, an efficient imaging method is proposed for MEO multichannel SAR-GMTI systems with relatively low resolution. The proposed imaging method is designed with the consideration of both static scenes and ground moving targets, and it can simultaneously correct the range cell migrations of static scenes and multiple moving targets of no Doppler ambiguity. It needs only four Fourier transforms and twice phase multiplications, and thus is computationally efficient. Moreover, moving targets’ signal characteristics, including the azimuth and range displacements and along-track interferometric phase, in the SAR image obtained by the proposed imaging method are figured out. Experimental results validate the proposed imaging method and the theoretical analyses. |
| first_indexed | 2024-03-09T18:42:32Z |
| format | Article |
| id | doaj.art-e1ce9072273d47f3ade4014696241506 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T18:42:32Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-e1ce9072273d47f3ade40146962415062023-11-24T06:39:16ZengMDPI AGRemote Sensing2072-42922022-10-011421545310.3390/rs14215453An Efficient Imaging Method for Medium-Earth-Orbit Multichannel SAR-GMTI SystemsYongkang Li0Tianyu Huo1Cuiqian Cao2School of Electronics and Information, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Electronics and Information, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Electronics and Information, Northwestern Polytechnical University, Xi’an 710072, ChinaMedium-Earth-orbit (MEO) synthetic aperture radar (SAR) has the advantages of short revisit time and wide coverage, and thus is a potential tool for implementing ground moving target indication (GMTI) tasks. In the paper, aiming at MEO SAR’s problems of low signal-to-noise ratio and limited computation resource, an efficient imaging method is proposed for MEO multichannel SAR-GMTI systems with relatively low resolution. The proposed imaging method is designed with the consideration of both static scenes and ground moving targets, and it can simultaneously correct the range cell migrations of static scenes and multiple moving targets of no Doppler ambiguity. It needs only four Fourier transforms and twice phase multiplications, and thus is computationally efficient. Moreover, moving targets’ signal characteristics, including the azimuth and range displacements and along-track interferometric phase, in the SAR image obtained by the proposed imaging method are figured out. Experimental results validate the proposed imaging method and the theoretical analyses.https://www.mdpi.com/2072-4292/14/21/5453synthetic aperture radarmedium-Earth-orbitimaging methodground moving target indication |
| spellingShingle | Yongkang Li Tianyu Huo Cuiqian Cao An Efficient Imaging Method for Medium-Earth-Orbit Multichannel SAR-GMTI Systems Remote Sensing synthetic aperture radar medium-Earth-orbit imaging method ground moving target indication |
| title | An Efficient Imaging Method for Medium-Earth-Orbit Multichannel SAR-GMTI Systems |
| title_full | An Efficient Imaging Method for Medium-Earth-Orbit Multichannel SAR-GMTI Systems |
| title_fullStr | An Efficient Imaging Method for Medium-Earth-Orbit Multichannel SAR-GMTI Systems |
| title_full_unstemmed | An Efficient Imaging Method for Medium-Earth-Orbit Multichannel SAR-GMTI Systems |
| title_short | An Efficient Imaging Method for Medium-Earth-Orbit Multichannel SAR-GMTI Systems |
| title_sort | efficient imaging method for medium earth orbit multichannel sar gmti systems |
| topic | synthetic aperture radar medium-Earth-orbit imaging method ground moving target indication |
| url | https://www.mdpi.com/2072-4292/14/21/5453 |
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