A Novel Azimuth Doppler Signal Reconstruction Approach for the GEO-LEO Bi-Static Multi-Channel HRWS SAR System
For the geosynchronous-low earth orbit (GEO-LEO) bi-static multi-channel high-resolution and wide-swath synthetic aperture radar (HRWS SAR) system, a novel azimuth Doppler signal reconstruction algorithm is developed based on an equivalent baseline approximating in the azimuth Doppler chirp Fourier...
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IEEE
2019-01-01
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Series: | IEEE Access |
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Online Access: | https://ieeexplore.ieee.org/document/8665898/ |
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author | Shuang-Xi Zhang Shaojie Li Yanyang Liu Meng-Dao Xing Junli Chen |
author_facet | Shuang-Xi Zhang Shaojie Li Yanyang Liu Meng-Dao Xing Junli Chen |
author_sort | Shuang-Xi Zhang |
collection | DOAJ |
description | For the geosynchronous-low earth orbit (GEO-LEO) bi-static multi-channel high-resolution and wide-swath synthetic aperture radar (HRWS SAR) system, a novel azimuth Doppler signal reconstruction algorithm is developed based on an equivalent baseline approximating in the azimuth Doppler chirp Fourier transform domain. The main difficulty for the GEO-LEO bistatic multi-channel HRWS SAR system is that the baseline is variant with the scene in the conventional Doppler Fourier transform domain during azimuth signal reconstruction. The developed approach first employs the linear range cell migration correction and chirp Fourier transform to obtain the coarse-focused ambiguity SAR image. More importantly, the baseline component can be approximated a uniform baseline length for the whole image scene and the ambiguous Doppler spectrum can be reconstructed using the available Doppler signal reconstruction approach. Finally, the experimental results for a simulation GEO-LEO bi-static multi-channel HRWS SAR system are employed to validate the theoretical investigations and the proposed approach. |
first_indexed | 2024-12-19T06:30:14Z |
format | Article |
id | doaj.art-a04538a96e4642a5a8e922bc62605f26 |
institution | Directory Open Access Journal |
issn | 2169-3536 |
language | English |
last_indexed | 2024-12-19T06:30:14Z |
publishDate | 2019-01-01 |
publisher | IEEE |
record_format | Article |
series | IEEE Access |
spelling | doaj.art-a04538a96e4642a5a8e922bc62605f262022-12-21T20:32:26ZengIEEEIEEE Access2169-35362019-01-017395393954610.1109/ACCESS.2019.29046538665898A Novel Azimuth Doppler Signal Reconstruction Approach for the GEO-LEO Bi-Static Multi-Channel HRWS SAR SystemShuang-Xi Zhang0https://orcid.org/0000-0001-8828-5490Shaojie Li1Yanyang Liu2Meng-Dao Xing3Junli Chen4School of Electronics and Information, Northwestern Polytechnical University, Xian, ChinaSchool of Electronics and Information, Northwestern Polytechnical University, Xian, ChinaDepartment of Radar System Engineering, Shanghai Institute of Satellite Engineering, Shanghai, ChinaNational Key Laboratory of Radar Signal Processing, Xidian University, Xi’an, ChinaDepartment of Committee on Science and Technology, Shanghai Academy of Spaceflight Technology, Shanghai, ChinaFor the geosynchronous-low earth orbit (GEO-LEO) bi-static multi-channel high-resolution and wide-swath synthetic aperture radar (HRWS SAR) system, a novel azimuth Doppler signal reconstruction algorithm is developed based on an equivalent baseline approximating in the azimuth Doppler chirp Fourier transform domain. The main difficulty for the GEO-LEO bistatic multi-channel HRWS SAR system is that the baseline is variant with the scene in the conventional Doppler Fourier transform domain during azimuth signal reconstruction. The developed approach first employs the linear range cell migration correction and chirp Fourier transform to obtain the coarse-focused ambiguity SAR image. More importantly, the baseline component can be approximated a uniform baseline length for the whole image scene and the ambiguous Doppler spectrum can be reconstructed using the available Doppler signal reconstruction approach. Finally, the experimental results for a simulation GEO-LEO bi-static multi-channel HRWS SAR system are employed to validate the theoretical investigations and the proposed approach.https://ieeexplore.ieee.org/document/8665898/Synthetic aperture radar (SAR)bistaticthe geosynchronous-low earth orbit (GEO-LEO)multi-channel in azimuth high-resolution and wide-swath (MC-HRWS)Doppler signal reconstruction |
spellingShingle | Shuang-Xi Zhang Shaojie Li Yanyang Liu Meng-Dao Xing Junli Chen A Novel Azimuth Doppler Signal Reconstruction Approach for the GEO-LEO Bi-Static Multi-Channel HRWS SAR System IEEE Access Synthetic aperture radar (SAR) bistatic the geosynchronous-low earth orbit (GEO-LEO) multi-channel in azimuth high-resolution and wide-swath (MC-HRWS) Doppler signal reconstruction |
title | A Novel Azimuth Doppler Signal Reconstruction Approach for the GEO-LEO Bi-Static Multi-Channel HRWS SAR System |
title_full | A Novel Azimuth Doppler Signal Reconstruction Approach for the GEO-LEO Bi-Static Multi-Channel HRWS SAR System |
title_fullStr | A Novel Azimuth Doppler Signal Reconstruction Approach for the GEO-LEO Bi-Static Multi-Channel HRWS SAR System |
title_full_unstemmed | A Novel Azimuth Doppler Signal Reconstruction Approach for the GEO-LEO Bi-Static Multi-Channel HRWS SAR System |
title_short | A Novel Azimuth Doppler Signal Reconstruction Approach for the GEO-LEO Bi-Static Multi-Channel HRWS SAR System |
title_sort | novel azimuth doppler signal reconstruction approach for the geo leo bi static multi channel hrws sar system |
topic | Synthetic aperture radar (SAR) bistatic the geosynchronous-low earth orbit (GEO-LEO) multi-channel in azimuth high-resolution and wide-swath (MC-HRWS) Doppler signal reconstruction |
url | https://ieeexplore.ieee.org/document/8665898/ |
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