Optimization of Finite-Alphabet Signaling for Two-User Multiaccess VLC Systems
Ubiquitous light emitting dioxides provide natural infrastructures for multiuser visible light communications (VLC). The current available works mainly focus on a potential assumption of the continuous signaling. In this paper, we consider a two-user multiaccess VLC system with finite-alphabet input...
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IEEE
2018-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/8447198/ |
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| author | Zhen-Yu Wang Hong-Yi Yu Yan-Yu Zhang Da-Ming Wang |
| author_facet | Zhen-Yu Wang Hong-Yi Yu Yan-Yu Zhang Da-Ming Wang |
| author_sort | Zhen-Yu Wang |
| collection | DOAJ |
| description | Ubiquitous light emitting dioxides provide natural infrastructures for multiuser visible light communications (VLC). The current available works mainly focus on a potential assumption of the continuous signaling. In this paper, we consider a two-user multiaccess VLC system with finite-alphabet inputs. To manage the nonnegative finite-alphabet multiuser interference, we adaptively adjust the power of each user's transmitted signals to maximize the received minimum Euclidean distance. By applying the properties of Farey sequence in number theory to solve the finite-alphabet optimization, it is proved that the optimal received signal constitutes an equally spaced pulse amplitude modulation constellation, which admits a low-complexity maximum likelihood detection. Both analytical results and computer simulations demonstrate that our proposed design has substantial performance advantage over time division multiple access, especially for significant channel strength difference. |
| format | Article |
| id | doaj-art-875bf6f05ee94cdbb2e7cf6c48eeca82 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-875bf6f05ee94cdbb2e7cf6c48eeca822025-08-20T03:32:57ZengIEEEIEEE Photonics Journal1943-06552018-01-0110511210.1109/JPHOT.2018.28666248447198Optimization of Finite-Alphabet Signaling for Two-User Multiaccess VLC SystemsZhen-Yu Wang0https://orcid.org/0000-0002-8848-5932Hong-Yi Yu1https://orcid.org/0000-0003-0417-2179Yan-Yu Zhang2https://orcid.org/0000-0001-8992-1719Da-Ming Wang3National Digital Switching System Engineering and Technological Research Center, Zhengzhou, ChinaNational Digital Switching System Engineering and Technological Research Center, Zhengzhou, ChinaNational Digital Switching System Engineering and Technological Research Center, Zhengzhou, ChinaNational Digital Switching System Engineering and Technological Research Center, Zhengzhou, ChinaUbiquitous light emitting dioxides provide natural infrastructures for multiuser visible light communications (VLC). The current available works mainly focus on a potential assumption of the continuous signaling. In this paper, we consider a two-user multiaccess VLC system with finite-alphabet inputs. To manage the nonnegative finite-alphabet multiuser interference, we adaptively adjust the power of each user's transmitted signals to maximize the received minimum Euclidean distance. By applying the properties of Farey sequence in number theory to solve the finite-alphabet optimization, it is proved that the optimal received signal constitutes an equally spaced pulse amplitude modulation constellation, which admits a low-complexity maximum likelihood detection. Both analytical results and computer simulations demonstrate that our proposed design has substantial performance advantage over time division multiple access, especially for significant channel strength difference.https://ieeexplore.ieee.org/document/8447198/Maximum likelihood detectionmultiaccessfinite-alphabet inputs and visible light communications |
| spellingShingle | Zhen-Yu Wang Hong-Yi Yu Yan-Yu Zhang Da-Ming Wang Optimization of Finite-Alphabet Signaling for Two-User Multiaccess VLC Systems IEEE Photonics Journal Maximum likelihood detection multiaccess finite-alphabet inputs and visible light communications |
| title | Optimization of Finite-Alphabet Signaling for Two-User Multiaccess VLC Systems |
| title_full | Optimization of Finite-Alphabet Signaling for Two-User Multiaccess VLC Systems |
| title_fullStr | Optimization of Finite-Alphabet Signaling for Two-User Multiaccess VLC Systems |
| title_full_unstemmed | Optimization of Finite-Alphabet Signaling for Two-User Multiaccess VLC Systems |
| title_short | Optimization of Finite-Alphabet Signaling for Two-User Multiaccess VLC Systems |
| title_sort | optimization of finite alphabet signaling for two user multiaccess vlc systems |
| topic | Maximum likelihood detection multiaccess finite-alphabet inputs and visible light communications |
| url | https://ieeexplore.ieee.org/document/8447198/ |
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