GNSS-Based Passive Inverse SAR Imaging
The utilization of global navigation satellite system (GNSS) signals for remote sensing has been a hot topic recently. In this article, the feasibility of the GNSS-based passive inverse synthetic aperture radar (P-ISAR) is analyzed. GNSS-based P-ISAR can generate the two-dimensional image of a movin...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2023-01-01
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| Series: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9968093/ |
| _version_ | 1811290203117060096 |
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| author | Pengbo Wang Xinkai Zhou Yue Fang Hongcheng Zeng Jie Chen |
| author_facet | Pengbo Wang Xinkai Zhou Yue Fang Hongcheng Zeng Jie Chen |
| author_sort | Pengbo Wang |
| collection | DOAJ |
| description | The utilization of global navigation satellite system (GNSS) signals for remote sensing has been a hot topic recently. In this article, the feasibility of the GNSS-based passive inverse synthetic aperture radar (P-ISAR) is analyzed. GNSS-based P-ISAR can generate the two-dimensional image of a moving target, providing an estimation of the target size, which is very important information in target recognition. An effective GNSS-based P-ISAR moving target imaging algorithm is proposed. First, a precise direct path interference (DPI) suppression method is derived to eliminate the DPI power in the detection channel. Then, the P-ISAR signal processing method is established. Due to the large synthetic aperture time, the Doppler profile of the ISAR image will defocus if directly performing the Fourier transform. As a solution, a parametric autofocusing and cross-range scaling algorithm is specially tailored for the GNSS-based P-ISAR. The proposed algorithm cannot only focus and scale the ISAR image, but also provide an estimation of the cross-range velocity of the target. Simulation with an airplane target is designed to test the signal processing method. Finally, an experiment is conducted with a civil airplane as the target and GPS satellites as the illumination source. Focused ISAR image is successfully acquired. The estimated length and velocity of the target are approximately consistent with ground truth, which are obtained by the flight record. The potential of the GNSS-based P-ISAR on multistatic operations is also illustrated by the fusion of the ISAR images obtained using different satellites as illumination sources. |
| first_indexed | 2024-04-13T04:08:50Z |
| format | Article |
| id | doaj.art-70d53f50df334cc0a21242b675edd093 |
| institution | Directory Open Access Journal |
| issn | 2151-1535 |
| language | English |
| last_indexed | 2024-04-13T04:08:50Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| spelling | doaj.art-70d53f50df334cc0a21242b675edd0932022-12-22T03:03:10ZengIEEEIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing2151-15352023-01-011650852110.1109/JSTARS.2022.32258329968093GNSS-Based Passive Inverse SAR ImagingPengbo Wang0https://orcid.org/0000-0002-6364-9806Xinkai Zhou1https://orcid.org/0000-0002-9352-5695Yue Fang2Hongcheng Zeng3https://orcid.org/0000-0002-4727-9980Jie Chen4School of Electronics and Information Engineering, Beihang University, Beijing, ChinaSchool of Electronics and Information Engineering, Beihang University, Beijing, ChinaBeijing Institute of Spacecraft System Engineering, Beijing, ChinaSchool of Electronics and Information Engineering, Beihang University, Beijing, ChinaSchool of Electronics and Information Engineering, Beihang University, Beijing, ChinaThe utilization of global navigation satellite system (GNSS) signals for remote sensing has been a hot topic recently. In this article, the feasibility of the GNSS-based passive inverse synthetic aperture radar (P-ISAR) is analyzed. GNSS-based P-ISAR can generate the two-dimensional image of a moving target, providing an estimation of the target size, which is very important information in target recognition. An effective GNSS-based P-ISAR moving target imaging algorithm is proposed. First, a precise direct path interference (DPI) suppression method is derived to eliminate the DPI power in the detection channel. Then, the P-ISAR signal processing method is established. Due to the large synthetic aperture time, the Doppler profile of the ISAR image will defocus if directly performing the Fourier transform. As a solution, a parametric autofocusing and cross-range scaling algorithm is specially tailored for the GNSS-based P-ISAR. The proposed algorithm cannot only focus and scale the ISAR image, but also provide an estimation of the cross-range velocity of the target. Simulation with an airplane target is designed to test the signal processing method. Finally, an experiment is conducted with a civil airplane as the target and GPS satellites as the illumination source. Focused ISAR image is successfully acquired. The estimated length and velocity of the target are approximately consistent with ground truth, which are obtained by the flight record. The potential of the GNSS-based P-ISAR on multistatic operations is also illustrated by the fusion of the ISAR images obtained using different satellites as illumination sources.https://ieeexplore.ieee.org/document/9968093/Direct path interference (DPI) suppressionglobal navigation satellite system (GNSS)parametric autofocusingpassive Inverse synthetic aperture radar (SAR) (ISAR) |
| spellingShingle | Pengbo Wang Xinkai Zhou Yue Fang Hongcheng Zeng Jie Chen GNSS-Based Passive Inverse SAR Imaging IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Direct path interference (DPI) suppression global navigation satellite system (GNSS) parametric autofocusing passive Inverse synthetic aperture radar (SAR) (ISAR) |
| title | GNSS-Based Passive Inverse SAR Imaging |
| title_full | GNSS-Based Passive Inverse SAR Imaging |
| title_fullStr | GNSS-Based Passive Inverse SAR Imaging |
| title_full_unstemmed | GNSS-Based Passive Inverse SAR Imaging |
| title_short | GNSS-Based Passive Inverse SAR Imaging |
| title_sort | gnss based passive inverse sar imaging |
| topic | Direct path interference (DPI) suppression global navigation satellite system (GNSS) parametric autofocusing passive Inverse synthetic aperture radar (SAR) (ISAR) |
| url | https://ieeexplore.ieee.org/document/9968093/ |
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