Spectral-Efficient PAM Modulations for Dimmable Visible Light Communication Systems

Autor:	Duoying Zhang, Shancheng Zhao, Hao Zhang
Rok vydání:	2022
Předmět:	ComputingMethodologies_PATTERNRECOGNITION Computer science Efficient algorithm Pulse-amplitude modulation Modeling and Simulation Modulation (music) Electronic engineering Visible light communication Graph (abstract data type) Electrical and Electronic Engineering Computer Science Applications
Zdroj:	IEEE Communications Letters. 26:118-122
ISSN:	2373-7891 1089-7798
DOI:	10.1109/lcomm.2021.3123145
Popis:	In visible light communications (VLC), the bulbs are used to provide communication and illumination simultaneously. Therefore, it is important to design modulation schemes, which are capable of adjusting the illumination level. The simplest approach to achieve this is compensating an all-one or an all-zero sequence, which however is spectrally inefficient. In this paper, we propose to use the constant sum codes to construct spectral-efficient dimmable pulse amplitude modulation (PAM) for VLC. We also present an efficient algorithm based on graph expanding to design the mapping for the proposed dimmable PAM. Numerical results show that the spectral efficiencies of the proposed dimmable PAM are higher than those of the state-of-the-arts. Numerical results also show that the proposed dimmable PAM performs better than the state-of-the-arts in coded VLC. These results show the potential advantages of the proposed dimmable PAM.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cf566c722118d0c7acb99124f2f8714d https://doi.org/10.1109/lcomm.2021.3123145 Zobrazit plný text záznamu