Demonstration of Phase-Preserving Synchronization RFI Suppression for <italic>L</italic>-Band Spaceborne Bistatic Interferometric SAR
Spaceborne bistatic synthetic aperture radar (BiSAR) systems utilize an intersatellite link to achieve phase synchronization. However, radio frequency interference (RFI) from communication satellites and ground-based radars often contaminates the synchronization signal, leading to inaccuracies in th...
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| Format: | Article |
| Language: | English |
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IEEE
2024-01-01
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| Series: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
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| Online Access: | https://ieeexplore.ieee.org/document/10742483/ |
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| author | Yanyan Zhang Junfeng Li Pingping Lu Tianyuan Yang Robert Wang |
| author_facet | Yanyan Zhang Junfeng Li Pingping Lu Tianyuan Yang Robert Wang |
| author_sort | Yanyan Zhang |
| collection | DOAJ |
| description | Spaceborne bistatic synthetic aperture radar (BiSAR) systems utilize an intersatellite link to achieve phase synchronization. However, radio frequency interference (RFI) from communication satellites and ground-based radars often contaminates the synchronization signal, leading to inaccuracies in the inverted digital elevation model (DEM). Therefore, this article puts forward an advanced phase-preserving synchronization RFI suppression method and validates it using data from an <inline-formula><tex-math notation="LaTeX">$L$</tex-math></inline-formula>-band BiSAR system, LuTan-1 (LT-1). The method involves detecting and locating RFI within a monopulse synchronization signal, and the signal at the estimated RFI position is removed to obtain a preprocessed signal. Then, based on the preprocessed signal and the RFI model, RFI is estimated using a gradient-based approach. Finally, the estimated RFI is subtracted from the monopulse signal to obtain the desired signal. In addition, synchronization RFI suppression and DEM generation experiments are performed on the LT-1 data to verify the proposed method. Experimental results demonstrate that the method effectively suppresses synchronization RFI and improves DEM accuracy, and it has extensive application prospects in future low-band distributed interferometric synthetic aperture radar missions. |
| format | Article |
| id | doaj-art-703d08b6468f443193fce04f700a6be2 |
| institution | OA Journals |
| issn | 1939-1404 2151-1535 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
| spelling | doaj-art-703d08b6468f443193fce04f700a6be22025-08-20T02:27:50ZengIEEEIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing1939-14042151-15352024-01-0117201902020810.1109/JSTARS.2024.349095710742483Demonstration of Phase-Preserving Synchronization RFI Suppression for <italic>L</italic>-Band Spaceborne Bistatic Interferometric SARYanyan Zhang0https://orcid.org/0000-0002-3497-4474Junfeng Li1Pingping Lu2https://orcid.org/0000-0003-1486-7580Tianyuan Yang3https://orcid.org/0000-0002-6010-7876Robert Wang4https://orcid.org/0000-0002-9850-7015National Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, ChinaNational Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, ChinaSpaceborne bistatic synthetic aperture radar (BiSAR) systems utilize an intersatellite link to achieve phase synchronization. However, radio frequency interference (RFI) from communication satellites and ground-based radars often contaminates the synchronization signal, leading to inaccuracies in the inverted digital elevation model (DEM). Therefore, this article puts forward an advanced phase-preserving synchronization RFI suppression method and validates it using data from an <inline-formula><tex-math notation="LaTeX">$L$</tex-math></inline-formula>-band BiSAR system, LuTan-1 (LT-1). The method involves detecting and locating RFI within a monopulse synchronization signal, and the signal at the estimated RFI position is removed to obtain a preprocessed signal. Then, based on the preprocessed signal and the RFI model, RFI is estimated using a gradient-based approach. Finally, the estimated RFI is subtracted from the monopulse signal to obtain the desired signal. In addition, synchronization RFI suppression and DEM generation experiments are performed on the LT-1 data to verify the proposed method. Experimental results demonstrate that the method effectively suppresses synchronization RFI and improves DEM accuracy, and it has extensive application prospects in future low-band distributed interferometric synthetic aperture radar missions.https://ieeexplore.ieee.org/document/10742483/Bistatic synthetic aperture radar (SAR)interferometric SAR (InSAR)LuTan-1 (LT-1)phase synchronizationradio frequency interference (RFI) suppression |
| spellingShingle | Yanyan Zhang Junfeng Li Pingping Lu Tianyuan Yang Robert Wang Demonstration of Phase-Preserving Synchronization RFI Suppression for <italic>L</italic>-Band Spaceborne Bistatic Interferometric SAR IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Bistatic synthetic aperture radar (SAR) interferometric SAR (InSAR) LuTan-1 (LT-1) phase synchronization radio frequency interference (RFI) suppression |
| title | Demonstration of Phase-Preserving Synchronization RFI Suppression for <italic>L</italic>-Band Spaceborne Bistatic Interferometric SAR |
| title_full | Demonstration of Phase-Preserving Synchronization RFI Suppression for <italic>L</italic>-Band Spaceborne Bistatic Interferometric SAR |
| title_fullStr | Demonstration of Phase-Preserving Synchronization RFI Suppression for <italic>L</italic>-Band Spaceborne Bistatic Interferometric SAR |
| title_full_unstemmed | Demonstration of Phase-Preserving Synchronization RFI Suppression for <italic>L</italic>-Band Spaceborne Bistatic Interferometric SAR |
| title_short | Demonstration of Phase-Preserving Synchronization RFI Suppression for <italic>L</italic>-Band Spaceborne Bistatic Interferometric SAR |
| title_sort | demonstration of phase preserving synchronization rfi suppression for italic l italic band spaceborne bistatic interferometric sar |
| topic | Bistatic synthetic aperture radar (SAR) interferometric SAR (InSAR) LuTan-1 (LT-1) phase synchronization radio frequency interference (RFI) suppression |
| url | https://ieeexplore.ieee.org/document/10742483/ |
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