An Efficient Refocusing Method for Ground Moving Targets in Multichannel SAR Imagery
| Author(s) | Ma, Jingtao | |
| Author(s) | Xia, Xiang-Gen | |
| Author(s) | Wang, Jiannan | |
| Author(s) | Tao, Haihong | |
| Author(s) | Liao, Guisheng | |
| Author(s) | Huang, Penghui | |
| Date Accessioned | 2024-09-11T18:35:31Z | |
| Date Available | 2024-09-11T18:35:31Z | |
| Publication Date | 2024-08-02 | |
| Description | This article was originally published in IEEE Geoscience and Remote Sensing Letters. The version of record is available at: https://doi.org/10.1109/LGRS.2024.3437429. © 2024 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. This article will be embargoed until 08/02/2026. | |
| Abstract | This letter proposes a fast Doppler parameter estimation and refocusing method for ground moving targets in a synthetic aperture radar (SAR) system. In the proposed method, after implementing the main-lobe clutter rejection by using the azimuth adaptive processing technique, the range-azimuth positions of smeared target scatterers can be obtained via the constant false alarm rate (CFAR) detection. Then, an autocorrelation function is constructed to transform a moving target signal into the time-frequency plane, where the target parameters can be precisely and efficiently estimated by applying the scaled fast Fourier transform (FFT). Finally, ground moving targets can be well refocused and relocated in a SAR imagery. Compared with the conventional methods, the target output SNR can be enlarged about 3 dB under the low SNR by using the proposed parameter estimation method. | |
| Sponsor | This work was supported in part by the National Natural Science Foundation Program of China under Grants 62171272, USCAST2022-21, USCAST2023-29. | |
| Citation | J. Ma, X. -G. Xia, J. Wang, H. Tao, G. Liao and P. Huang, "An Efficient Refocusing Method for Ground Moving Targets in Multichannel SAR Imagery," in IEEE Geoscience and Remote Sensing Letters, vol. 21, pp. 1-5, 2024, Art no. 4014105, doi: 10.1109/LGRS.2024.3437429. | |
| ISSN | 1558-0571 | |
| URL | https://udspace.udel.edu/handle/19716/34948 | |
| Language | en_US | |
| Publisher | IEEE Geoscience and Remote Sensing Letters | |
| Keywords | doppler parameter estimation | |
| Keywords | ground moving target refocusing and relocation | |
| Keywords | synthetic aperture radar (SAR) | |
| Title | An Efficient Refocusing Method for Ground Moving Targets in Multichannel SAR Imagery | |
| Type | Article |
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