A New SAR-GMTI High-Accuracy Focusing and Relocation Method Using Instantaneous Interferometry
In this paper, for a multichannel synthetic aperture radar-ground moving target indication (SAR-GMTI) system, a new high-accuracy focusing and relocating method using instantaneous interferometry, i.e., carrying out interferometry operation in the azimuth time domain before focusing, is proposed. On...
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| Veröffentlicht in: | IEEE transactions on geoscience and remote sensing 2016-09, Vol.54 (9), p.5564-5577 |
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| container_title | IEEE transactions on geoscience and remote sensing |
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| creator | Zhang, Sheng Zhou, Fang Sun, Guang-Cai Xia, Xiang-Gen Xing, Meng-Dao Bao, Zheng |
| description | In this paper, for a multichannel synthetic aperture radar-ground moving target indication (SAR-GMTI) system, a new high-accuracy focusing and relocating method using instantaneous interferometry, i.e., carrying out interferometry operation in the azimuth time domain before focusing, is proposed. One of the key steps of this method is to perform instantaneous interferometry to get accurate equivalent cross-track velocity (ECV) estimation for cross-track motion compensation. After that, the signal from a moving target is concentrated in range, and along-track motion compensation becomes convenient. Motion compensation transforms a moving target into a stationary one; thus, the conventional SAR imaging algorithm can be applied to focus the moving target. Finally, a strategy for accurately relocating a moving target is presented. The processing results of simulated and measured data illustrate the effectiveness of the proposed method. |
| doi_str_mv | 10.1109/TGRS.2016.2569259 |
| format | Article |
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One of the key steps of this method is to perform instantaneous interferometry to get accurate equivalent cross-track velocity (ECV) estimation for cross-track motion compensation. After that, the signal from a moving target is concentrated in range, and along-track motion compensation becomes convenient. Motion compensation transforms a moving target into a stationary one; thus, the conventional SAR imaging algorithm can be applied to focus the moving target. Finally, a strategy for accurately relocating a moving target is presented. 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One of the key steps of this method is to perform instantaneous interferometry to get accurate equivalent cross-track velocity (ECV) estimation for cross-track motion compensation. After that, the signal from a moving target is concentrated in range, and along-track motion compensation becomes convenient. Motion compensation transforms a moving target into a stationary one; thus, the conventional SAR imaging algorithm can be applied to focus the moving target. Finally, a strategy for accurately relocating a moving target is presented. 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| identifier | ISSN: 0196-2892 |
| ispartof | IEEE transactions on geoscience and remote sensing, 2016-09, Vol.54 (9), p.5564-5577 |
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| source | IEEE Electronic Library (IEL) |
| subjects | Algorithms Azimuth Clutter Computer simulation Cross-track velocity estimation Equivalence Estimation Focusing ground moving target indication (GMTI) instantaneous interferometry Interferometry Motion compensation Moving targets Receiving antennas Relocation Strategy synthetic aperture radar (SAR) |
| title | A New SAR-GMTI High-Accuracy Focusing and Relocation Method Using Instantaneous Interferometry |
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