Indoor visible light communications: challenges and prospects

Majumdar, Arun K., O'Brien, Dominic, Davis, Christopher C., Le Minh, Hoa, Zeng, Lubin, Faulkner, Grahame, Lee, Kyungwoo, Jung, Daekwang, Oh, YunJe and Won, Eun Tae (2008) Indoor visible light communications: challenges and prospects. In: Free-Space Laser Communications VIII, 10th - 12th August 2008, San Diego, CA.

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The rapid improvement in the efficiency of solid-state lighting has led to predictions that it will be the dominant source used for most indoor lighting applications in the future. At present an attractive candidate for generating white-light are blue LEDs that excite a yellow phosphor, with a resultant colour emission. Such solid state sources can be used for both illumination and communications simultaneously, offering the possibility of creating wireless broadcasting within a room or office space. In this paper we outline a typical basic configuration, and the performance available using simple modulation schemes. Unmodified LEDs typically have modulation bandwidths of several MHz, but typical lighting levels provide a communications channel with a Signal to Noise Ratios in excess of 40dB. Techniques such as equalisation can be used to improve available data rate significantly, and in this paper we outline several approaches that have the potential to offer data rates of 100Mb/s and above.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Optical wireless, Solid-state lighting, Visible light communications
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Paul Burns
Date Deposited: 16 Mar 2018 13:30
Last Modified: 11 Oct 2019 21:31

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