Few-Mode Based Beam Shaping for Multi-User Indoor Optical Wireless Communications With Time-Slot Coding
We propose a novel indoor optical wireless communications (OWC) system using few-mode based beam shaping integrating time-slot coding (TSC) scheme to serve multiple users simultaneously. We simulated an indoor OWC system incorporating single-sideband (SSB) 16 quadrature amplitude modulation (16-QAM)...
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9662656/ |
| _version_ | 1811234112981172224 |
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| author | Jianghao Li Christina Lim Ampalavanapillai Nirmalathas |
| author_facet | Jianghao Li Christina Lim Ampalavanapillai Nirmalathas |
| author_sort | Jianghao Li |
| collection | DOAJ |
| description | We propose a novel indoor optical wireless communications (OWC) system using few-mode based beam shaping integrating time-slot coding (TSC) scheme to serve multiple users simultaneously. We simulated an indoor OWC system incorporating single-sideband (SSB) 16 quadrature amplitude modulation (16-QAM) modulated signals in a multi-user environment employing few-mode based beam shaping with single-photodetector (PD) and multi-PD reception with maximum ratio combining (MRC), respectively. The results show that for both single-PD and multi-PD receptions, the bit-error-rate (BER) performance can be significantly improved at different positions within the cell and the size of the effective coverage (BER<3.8 × 10<sup>−3</sup>) can be increased by 4 times by employing few-mode based beam shaping scheme at 1:1.79 power ratio between LP<sub>01</sub> mode and LP<sub>11</sub> mode, compared to conventional OWC systems without few-mode based beam shaping scheme. In addition, the system tolerance to signal overlapping can also be enhanced with the proposed few-mode based beam shaping. The optimal power ratios of LP<sub>01</sub> mode and LP<sub>11</sub> mode when achieving the maximum effective coverage under 7% and 20% HD-FEC thresholds for single-PD and multi-PD reception have also been investigated. Furthermore, the tolerance to the interval delay with 0.23 and 0.28 symbols can be achieved in single-PD and multi-PD reception, respectively. |
| first_indexed | 2024-04-12T11:31:14Z |
| format | Article |
| id | doaj.art-7da37f406a6b401cb23b8f2f5b3f8783 |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-04-12T11:31:14Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-7da37f406a6b401cb23b8f2f5b3f87832022-12-22T03:35:01ZengIEEEIEEE Photonics Journal1943-06552022-01-011411910.1109/JPHOT.2021.31381969662656Few-Mode Based Beam Shaping for Multi-User Indoor Optical Wireless Communications With Time-Slot CodingJianghao Li0https://orcid.org/0000-0001-9153-729XChristina Lim1https://orcid.org/0000-0002-9212-9738Ampalavanapillai Nirmalathas2https://orcid.org/0000-0001-7328-5359Department of Electrical and Electronic Engineering, The University of Melbourne, Melbourne, VIC, AustraliaDepartment of Electrical and Electronic Engineering, The University of Melbourne, Melbourne, VIC, AustraliaDepartment of Electrical and Electronic Engineering, The University of Melbourne, Melbourne, VIC, AustraliaWe propose a novel indoor optical wireless communications (OWC) system using few-mode based beam shaping integrating time-slot coding (TSC) scheme to serve multiple users simultaneously. We simulated an indoor OWC system incorporating single-sideband (SSB) 16 quadrature amplitude modulation (16-QAM) modulated signals in a multi-user environment employing few-mode based beam shaping with single-photodetector (PD) and multi-PD reception with maximum ratio combining (MRC), respectively. The results show that for both single-PD and multi-PD receptions, the bit-error-rate (BER) performance can be significantly improved at different positions within the cell and the size of the effective coverage (BER<3.8 × 10<sup>−3</sup>) can be increased by 4 times by employing few-mode based beam shaping scheme at 1:1.79 power ratio between LP<sub>01</sub> mode and LP<sub>11</sub> mode, compared to conventional OWC systems without few-mode based beam shaping scheme. In addition, the system tolerance to signal overlapping can also be enhanced with the proposed few-mode based beam shaping. The optimal power ratios of LP<sub>01</sub> mode and LP<sub>11</sub> mode when achieving the maximum effective coverage under 7% and 20% HD-FEC thresholds for single-PD and multi-PD reception have also been investigated. Furthermore, the tolerance to the interval delay with 0.23 and 0.28 symbols can be achieved in single-PD and multi-PD reception, respectively.https://ieeexplore.ieee.org/document/9662656/Optical wireless communicationmultiple accessbeam shapeKramers-Kronig receiverwireless personal area networks |
| spellingShingle | Jianghao Li Christina Lim Ampalavanapillai Nirmalathas Few-Mode Based Beam Shaping for Multi-User Indoor Optical Wireless Communications With Time-Slot Coding IEEE Photonics Journal Optical wireless communication multiple access beam shape Kramers-Kronig receiver wireless personal area networks |
| title | Few-Mode Based Beam Shaping for Multi-User Indoor Optical Wireless Communications With Time-Slot Coding |
| title_full | Few-Mode Based Beam Shaping for Multi-User Indoor Optical Wireless Communications With Time-Slot Coding |
| title_fullStr | Few-Mode Based Beam Shaping for Multi-User Indoor Optical Wireless Communications With Time-Slot Coding |
| title_full_unstemmed | Few-Mode Based Beam Shaping for Multi-User Indoor Optical Wireless Communications With Time-Slot Coding |
| title_short | Few-Mode Based Beam Shaping for Multi-User Indoor Optical Wireless Communications With Time-Slot Coding |
| title_sort | few mode based beam shaping for multi user indoor optical wireless communications with time slot coding |
| topic | Optical wireless communication multiple access beam shape Kramers-Kronig receiver wireless personal area networks |
| url | https://ieeexplore.ieee.org/document/9662656/ |
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