Ship Velocity Estimation in Airborne Along-Track Interferometric SAR Imagery Based on the Fractional Fourier Transform
Synthetic aperture radar (SAR) was originally exploited to image stationary scenes. However, it is important to derive target information of velocity for many applications. The fractional Fourier transform (FrFT) is a generalization of the classical Fourier transform and is well-known as a useful to...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2020/5835620 |
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| author | Chao Chen Yan Li Kuihua Huang Yonghong Long Linlin Zhang Kewei Ouyang |
| author_facet | Chao Chen Yan Li Kuihua Huang Yonghong Long Linlin Zhang Kewei Ouyang |
| author_sort | Chao Chen |
| collection | DOAJ |
| description | Synthetic aperture radar (SAR) was originally exploited to image stationary scenes. However, it is important to derive target information of velocity for many applications. The fractional Fourier transform (FrFT) is a generalization of the classical Fourier transform and is well-known as a useful tool to estimate the chirp rate of linear frequency-modulated (LFM) signals. Motion compensation is critical to moving target imaging. It is difficult for us to obtain the actual motion parameters in real scenarios. Based on the moving target echo model in airborne along-track interferometric SAR (ATI-SAR) and expression of the ATI phase, a method is proposed to estimate the ship velocity by combining the ATI phase with FrFT. First, we use the FrFT to evaluate the chirp rate of the moving target echo. Then, we construct an equation to estimate the ship velocity using the chirp rate estimation, peak response time, and ATI phase. Finally, the simulation experiments are used to validate the effectiveness of the proposed method. |
| format | Article |
| id | doaj-art-d5144ce40ffe4a07a3d7fd9197b924c8 |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-d5144ce40ffe4a07a3d7fd9197b924c82025-02-03T06:43:30ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772020-01-01202010.1155/2020/58356205835620Ship Velocity Estimation in Airborne Along-Track Interferometric SAR Imagery Based on the Fractional Fourier TransformChao Chen0Yan Li1Kuihua Huang2Yonghong Long3Linlin Zhang4Kewei Ouyang5College of System Engineering, National University of Defence Technology, Changsha 410073, ChinaCollege of System Engineering, National University of Defence Technology, Changsha 410073, ChinaCollege of System Engineering, National University of Defence Technology, Changsha 410073, ChinaCollege of Traffic Engineering, Hunan University of Technology, Zhuzhou 412007, ChinaFaculty of Geoscience and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, ChinaCollege of Electronic Science, National University of Defence Technology, Changsha 410073, ChinaSynthetic aperture radar (SAR) was originally exploited to image stationary scenes. However, it is important to derive target information of velocity for many applications. The fractional Fourier transform (FrFT) is a generalization of the classical Fourier transform and is well-known as a useful tool to estimate the chirp rate of linear frequency-modulated (LFM) signals. Motion compensation is critical to moving target imaging. It is difficult for us to obtain the actual motion parameters in real scenarios. Based on the moving target echo model in airborne along-track interferometric SAR (ATI-SAR) and expression of the ATI phase, a method is proposed to estimate the ship velocity by combining the ATI phase with FrFT. First, we use the FrFT to evaluate the chirp rate of the moving target echo. Then, we construct an equation to estimate the ship velocity using the chirp rate estimation, peak response time, and ATI phase. Finally, the simulation experiments are used to validate the effectiveness of the proposed method.http://dx.doi.org/10.1155/2020/5835620 |
| spellingShingle | Chao Chen Yan Li Kuihua Huang Yonghong Long Linlin Zhang Kewei Ouyang Ship Velocity Estimation in Airborne Along-Track Interferometric SAR Imagery Based on the Fractional Fourier Transform International Journal of Antennas and Propagation |
| title | Ship Velocity Estimation in Airborne Along-Track Interferometric SAR Imagery Based on the Fractional Fourier Transform |
| title_full | Ship Velocity Estimation in Airborne Along-Track Interferometric SAR Imagery Based on the Fractional Fourier Transform |
| title_fullStr | Ship Velocity Estimation in Airborne Along-Track Interferometric SAR Imagery Based on the Fractional Fourier Transform |
| title_full_unstemmed | Ship Velocity Estimation in Airborne Along-Track Interferometric SAR Imagery Based on the Fractional Fourier Transform |
| title_short | Ship Velocity Estimation in Airborne Along-Track Interferometric SAR Imagery Based on the Fractional Fourier Transform |
| title_sort | ship velocity estimation in airborne along track interferometric sar imagery based on the fractional fourier transform |
| url | http://dx.doi.org/10.1155/2020/5835620 |
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