Improved branch-cut phase unwrapping strategy based on dynamic adjacent table
Phase unwrapping (PU) is a key step of interferometric SAR signal processing. The accuracy of the unwrapping phase directly affects the accuracy of the digital elevation model (DEM). The traditional path-integral methods and global-planning methods cannot take into account both PU accuracy and proce...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-07-01
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| Series: | The Journal of Engineering |
| Subjects: | |
| Online Access: | https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0352 |
| _version_ | 1818640105568468992 |
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| author | Tiandong Liu Zhengguo Shang Jiabao Wu Dawei Zhou Shi Yan |
| author_facet | Tiandong Liu Zhengguo Shang Jiabao Wu Dawei Zhou Shi Yan |
| author_sort | Tiandong Liu |
| collection | DOAJ |
| description | Phase unwrapping (PU) is a key step of interferometric SAR signal processing. The accuracy of the unwrapping phase directly affects the accuracy of the digital elevation model (DEM). The traditional path-integral methods and global-planning methods cannot take into account both PU accuracy and processing efficiency, and causes PU error diffusion and large-area PU holes. To solve these problems, this study proposed an improved PU strategy based on dynamic adjacent table. For the problem of unwrapping holes that appears in traditional path-integral methods, this study introduces improved local quality maps to guide the path-integral operation, which effectively realises the phase compensation of the PU holes. For the low efficiency of the traditional branch-cut algorithm, this study implements the real-time integration path optimisation planning by further introducing the dynamic adjacent table and greatly reduces the data volume of the adjacent table. Thus, the efficiency of PU was greatly improved. Finally, the proposed method was validated by the airborne dual-antenna interferometric SAR experimental data. |
| first_indexed | 2024-12-16T23:05:59Z |
| format | Article |
| id | doaj.art-573373196f4140beb16be500d2af46b0 |
| institution | Directory Open Access Journal |
| issn | 2051-3305 |
| language | English |
| last_indexed | 2024-12-16T23:05:59Z |
| publishDate | 2019-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Journal of Engineering |
| spelling | doaj.art-573373196f4140beb16be500d2af46b02022-12-21T22:12:33ZengWileyThe Journal of Engineering2051-33052019-07-0110.1049/joe.2019.0352JOE.2019.0352Improved branch-cut phase unwrapping strategy based on dynamic adjacent tableTiandong Liu0Zhengguo Shang1Jiabao Wu2Dawei Zhou3Shi Yan4Beijing Institute of Remote Sensing EquipmentBeijing Institute of Remote Sensing EquipmentBeijing Institute of Remote Sensing EquipmentBeijing Institute of Remote Sensing EquipmentBeijing Institute of Remote Sensing EquipmentPhase unwrapping (PU) is a key step of interferometric SAR signal processing. The accuracy of the unwrapping phase directly affects the accuracy of the digital elevation model (DEM). The traditional path-integral methods and global-planning methods cannot take into account both PU accuracy and processing efficiency, and causes PU error diffusion and large-area PU holes. To solve these problems, this study proposed an improved PU strategy based on dynamic adjacent table. For the problem of unwrapping holes that appears in traditional path-integral methods, this study introduces improved local quality maps to guide the path-integral operation, which effectively realises the phase compensation of the PU holes. For the low efficiency of the traditional branch-cut algorithm, this study implements the real-time integration path optimisation planning by further introducing the dynamic adjacent table and greatly reduces the data volume of the adjacent table. Thus, the efficiency of PU was greatly improved. Finally, the proposed method was validated by the airborne dual-antenna interferometric SAR experimental data.https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0352radar imagingterrain mappingsynthetic aperture radardigital elevation modelsradar interferometryairborne radarreal-time integration path optimisation planningdynamic adjacent tableinterferometric SAR signal processingdigital elevation modelpath-integral operationphase compensationbranch-cut phase unwrapping strategyunwrapping holeslocal quality mapsphase unwrapping holesairborne dual-antenna interferometric SAR |
| spellingShingle | Tiandong Liu Zhengguo Shang Jiabao Wu Dawei Zhou Shi Yan Improved branch-cut phase unwrapping strategy based on dynamic adjacent table The Journal of Engineering radar imaging terrain mapping synthetic aperture radar digital elevation models radar interferometry airborne radar real-time integration path optimisation planning dynamic adjacent table interferometric SAR signal processing digital elevation model path-integral operation phase compensation branch-cut phase unwrapping strategy unwrapping holes local quality maps phase unwrapping holes airborne dual-antenna interferometric SAR |
| title | Improved branch-cut phase unwrapping strategy based on dynamic adjacent table |
| title_full | Improved branch-cut phase unwrapping strategy based on dynamic adjacent table |
| title_fullStr | Improved branch-cut phase unwrapping strategy based on dynamic adjacent table |
| title_full_unstemmed | Improved branch-cut phase unwrapping strategy based on dynamic adjacent table |
| title_short | Improved branch-cut phase unwrapping strategy based on dynamic adjacent table |
| title_sort | improved branch cut phase unwrapping strategy based on dynamic adjacent table |
| topic | radar imaging terrain mapping synthetic aperture radar digital elevation models radar interferometry airborne radar real-time integration path optimisation planning dynamic adjacent table interferometric SAR signal processing digital elevation model path-integral operation phase compensation branch-cut phase unwrapping strategy unwrapping holes local quality maps phase unwrapping holes airborne dual-antenna interferometric SAR |
| url | https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0352 |
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