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access icon free Review of advanced techniques for multi-gigabit visible light communication

© The Institution of Engineering and Technology
Received 23/08/2019, Accepted 03/07/2020, Revised 06/06/2020, Published 10/08/2020

Visible light communication (VLC) is a promising candidate for future indoor wireless communication. Light emitting diodes (LEDs) are popular choices as transmitters for VLC, since they are energy efficient and have the ability to provide illumination and data transmission simultaneously. VLC is attractive for reasons such as security, the ability to use a licence free spectrum, and broad bandwidth. Previous review articles on VLC mainly focused on VLC network algorithms, implementation challenges, system design, applications, and physical layer technologies. Unlike the existing reviews, this study presents state-of-the-art VLC systems for high-speed data communication in the gigabit range and the techniques to achieve such high data rates. In addition, concepts such as LED modelling and fabrication process, recent commercial advancements of VLC products, and hybrid/heterogeneous networks to achieve high data rate are highlighted in this study. For this purpose, some key technologies of VLC systems, including channel equalisation from both transmitter and receiver sides, higher-order modulation techniques, wavelength division multiplexing, multiple input multiple output technology, LED modelling, and advanced fabrication processes are discussed. This study also covers recent advancements in commercialisation of VLC technology, and recent progress made by various research groups.

Inspec keywords: optical receivers; indoor communication; free-space optical communication; optical transmitters; wavelength division multiplexing; equalisers

Other keywords: indoor wireless communication; VLC products; channel equalisation; advanced fabrication processes; multigigabit visible light communication; physical layer technologies; licence free spectrum; transmitter sides; hybrid-heterogeneous networks; light emitting diodes; VLC network algorithms; data transmission; VLC systems; higher-order modulation techniques; high-speed data communication; VLC technology; wavelength division multiplexing; receiver sides; multiple input multiple output technology; LED modelling

Subjects: Free-space optical links; Multiplexing and switching in optical communication; Optical communication equipment; Communication channel equalisation and identification

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