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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Main Authors: Shuang-Xi Zhang, Shaojie Li, Yanyang Liu, Meng-Dao Xing, Junli Chen
Format: Article
Language:English
Published: IEEE 2019-01-01
Series:IEEE Access
Subjects:
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.
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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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