DLSLA 3D SAR Motion Error Compensation and Imaging Method Based on Parameter Estimation
In the presence of yaw angular velocity, a body will deviate from its ideal flight path, which will affect imaging of Downward-Looking Sparse Linear Array 3D Synthetic Aperture Radar (DLSLA 3D SAR). In this paper, an imaging model including yaw rate is established. Furthermore, Doppler frequency mod...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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China Science Publishing & Media Ltd. (CSPM)
2018-12-01
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| Series: | Leida xuebao |
| Subjects: | |
| Online Access: | http://radars.ie.ac.cn/fileup/HTML/R18107.htm |
| _version_ | 1797424513706622976 |
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| author | Liu Qiyong Zhang Qun Hong Wen Su Linghua Liang Jia |
| author_facet | Liu Qiyong Zhang Qun Hong Wen Su Linghua Liang Jia |
| author_sort | Liu Qiyong |
| collection | DOAJ |
| description | In the presence of yaw angular velocity, a body will deviate from its ideal flight path, which will affect imaging of Downward-Looking Sparse Linear Array 3D Synthetic Aperture Radar (DLSLA 3D SAR). In this paper, an imaging model including yaw rate is established. Furthermore, Doppler frequency modulation,
which is related to cross-track coordinates and not azimuth coordinates, was theoretically calculated. Thus, a cross-track signal could be reconstructed to obtain the cross-track coordinates before azimuth signal compression. Based on the parametric sparse representation, the velocity and yaw rate of the platform were estimated, and the azimuth signal was compressed. Moreover, a deformation correction method is proposed to correct image deformation. The simulation results demonstrate the validity of the proposed method. |
| first_indexed | 2024-03-09T08:03:18Z |
| format | Article |
| id | doaj.art-2d3c00a9b1544c58b6fd5bd7db7d9241 |
| institution | Directory Open Access Journal |
| issn | 2095-283X 2095-283X |
| language | English |
| last_indexed | 2024-03-09T08:03:18Z |
| publishDate | 2018-12-01 |
| publisher | China Science Publishing & Media Ltd. (CSPM) |
| record_format | Article |
| series | Leida xuebao |
| spelling | doaj.art-2d3c00a9b1544c58b6fd5bd7db7d92412023-12-03T00:34:07ZengChina Science Publishing & Media Ltd. (CSPM)Leida xuebao2095-283X2095-283X2018-12-017673073910.12000/JR18107DLSLA 3D SAR Motion Error Compensation and Imaging Method Based on Parameter EstimationLiu Qiyong0Zhang Qun1Hong Wen2Su Linghua3Liang Jia4①(Air Force Engineering University Graduate College, Xi’an 710077, China)②(College of Information and Navigation, Air Force Engineering University, Xi’an 710077, China) ③(Collaborative Innovation Center of Information Sensing and Understanding, Xi’an 710077, China) ④(The Key Laboratory for Information Science of Electromagnetic Waves (Ministry of Education), Fudan University, Shanghai 200433, China)⑤(National Key Laboratory of Microwave Imaging Technology, Beijing 100190, China) ⑥(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)②(College of Information and Navigation, Air Force Engineering University, Xi’an 710077, China) ③(Collaborative Innovation Center of Information Sensing and Understanding, Xi’an 710077, China)②(College of Information and Navigation, Air Force Engineering University, Xi’an 710077, China) ③(Collaborative Innovation Center of Information Sensing and Understanding, Xi’an 710077, China)In the presence of yaw angular velocity, a body will deviate from its ideal flight path, which will affect imaging of Downward-Looking Sparse Linear Array 3D Synthetic Aperture Radar (DLSLA 3D SAR). In this paper, an imaging model including yaw rate is established. Furthermore, Doppler frequency modulation, which is related to cross-track coordinates and not azimuth coordinates, was theoretically calculated. Thus, a cross-track signal could be reconstructed to obtain the cross-track coordinates before azimuth signal compression. Based on the parametric sparse representation, the velocity and yaw rate of the platform were estimated, and the azimuth signal was compressed. Moreover, a deformation correction method is proposed to correct image deformation. The simulation results demonstrate the validity of the proposed method.http://radars.ie.ac.cn/fileup/HTML/R18107.htmDownward-Looking Sparse Linear Array 3D Synthetic Aperture Radar (DLSLA 3D SAR)Motion errorDoppler frequency rateParametric sparse representation |
| spellingShingle | Liu Qiyong Zhang Qun Hong Wen Su Linghua Liang Jia DLSLA 3D SAR Motion Error Compensation and Imaging Method Based on Parameter Estimation Leida xuebao Downward-Looking Sparse Linear Array 3D Synthetic Aperture Radar (DLSLA 3D SAR) Motion error Doppler frequency rate Parametric sparse representation |
| title | DLSLA 3D SAR Motion Error Compensation and Imaging Method Based on Parameter Estimation |
| title_full | DLSLA 3D SAR Motion Error Compensation and Imaging Method Based on Parameter Estimation |
| title_fullStr | DLSLA 3D SAR Motion Error Compensation and Imaging Method Based on Parameter Estimation |
| title_full_unstemmed | DLSLA 3D SAR Motion Error Compensation and Imaging Method Based on Parameter Estimation |
| title_short | DLSLA 3D SAR Motion Error Compensation and Imaging Method Based on Parameter Estimation |
| title_sort | dlsla 3d sar motion error compensation and imaging method based on parameter estimation |
| topic | Downward-Looking Sparse Linear Array 3D Synthetic Aperture Radar (DLSLA 3D SAR) Motion error Doppler frequency rate Parametric sparse representation |
| url | http://radars.ie.ac.cn/fileup/HTML/R18107.htm |
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