Adaptive Beam Divergence Control to Mitigate Scintillation Effect Caused by Pointing Error in Vertical FSO Transmissions
Free-space optical (FSO) communication has been studied for next-generation network systems. Because an FSO system establishes point-to-point communication links, maintaining alignment among the transceivers is a critical challenge. In addition, atmospheric turbulence causes significant signal loss...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-05-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/11/5045 |
| _version_ | 1797596761792970752 |
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| author | Hye-Min Park Young-Jin Hyun Sang-Kook Han |
| author_facet | Hye-Min Park Young-Jin Hyun Sang-Kook Han |
| author_sort | Hye-Min Park |
| collection | DOAJ |
| description | Free-space optical (FSO) communication has been studied for next-generation network systems. Because an FSO system establishes point-to-point communication links, maintaining alignment among the transceivers is a critical challenge. In addition, atmospheric turbulence causes significant signal loss in FSO vertical links. Even in clear weather conditions, transmitted optical signals suffer significant scintillation losses due to random variations. Thus, the effect of atmospheric turbulence should be considered in vertical links. In this paper, we analyze the relationship between pointing error and scintillation from the aspect of beam divergence angle. Furthermore, we propose an adaptive beam that optimizes its divergence angle according to the pointing error between the communicating optical transceivers to mitigate the effect of scintillation due to pointing error. We performed a beam divergence angle optimization and compared it with adaptive beamwidth. The proposed technique was demonstrated using simulations, which revealed an enhanced signal-to-noise ratio and the mitigation of the scintillation effect. The proposed technique would be useful in minimizing the scintillation effect in vertical FSO links. |
| first_indexed | 2024-03-11T02:57:35Z |
| format | Article |
| id | doaj.art-4f485ca51cd44f379f71cfeaa214bd58 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T02:57:35Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-4f485ca51cd44f379f71cfeaa214bd582023-11-18T08:31:48ZengMDPI AGSensors1424-82202023-05-012311504510.3390/s23115045Adaptive Beam Divergence Control to Mitigate Scintillation Effect Caused by Pointing Error in Vertical FSO TransmissionsHye-Min Park0Young-Jin Hyun1Sang-Kook Han2Department of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of KoreaDepartment of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of KoreaDepartment of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of KoreaFree-space optical (FSO) communication has been studied for next-generation network systems. Because an FSO system establishes point-to-point communication links, maintaining alignment among the transceivers is a critical challenge. In addition, atmospheric turbulence causes significant signal loss in FSO vertical links. Even in clear weather conditions, transmitted optical signals suffer significant scintillation losses due to random variations. Thus, the effect of atmospheric turbulence should be considered in vertical links. In this paper, we analyze the relationship between pointing error and scintillation from the aspect of beam divergence angle. Furthermore, we propose an adaptive beam that optimizes its divergence angle according to the pointing error between the communicating optical transceivers to mitigate the effect of scintillation due to pointing error. We performed a beam divergence angle optimization and compared it with adaptive beamwidth. The proposed technique was demonstrated using simulations, which revealed an enhanced signal-to-noise ratio and the mitigation of the scintillation effect. The proposed technique would be useful in minimizing the scintillation effect in vertical FSO links.https://www.mdpi.com/1424-8220/23/11/5045free-space optical communicationsadaptive beamwidthatmospheric turbulencefree-space optical vertical link |
| spellingShingle | Hye-Min Park Young-Jin Hyun Sang-Kook Han Adaptive Beam Divergence Control to Mitigate Scintillation Effect Caused by Pointing Error in Vertical FSO Transmissions Sensors free-space optical communications adaptive beamwidth atmospheric turbulence free-space optical vertical link |
| title | Adaptive Beam Divergence Control to Mitigate Scintillation Effect Caused by Pointing Error in Vertical FSO Transmissions |
| title_full | Adaptive Beam Divergence Control to Mitigate Scintillation Effect Caused by Pointing Error in Vertical FSO Transmissions |
| title_fullStr | Adaptive Beam Divergence Control to Mitigate Scintillation Effect Caused by Pointing Error in Vertical FSO Transmissions |
| title_full_unstemmed | Adaptive Beam Divergence Control to Mitigate Scintillation Effect Caused by Pointing Error in Vertical FSO Transmissions |
| title_short | Adaptive Beam Divergence Control to Mitigate Scintillation Effect Caused by Pointing Error in Vertical FSO Transmissions |
| title_sort | adaptive beam divergence control to mitigate scintillation effect caused by pointing error in vertical fso transmissions |
| topic | free-space optical communications adaptive beamwidth atmospheric turbulence free-space optical vertical link |
| url | https://www.mdpi.com/1424-8220/23/11/5045 |
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