Indoor Visible Light Communications: challenges and prospects

被引:123
作者
O'Brien, Dominic [1 ]
Minh, Hoa Le [1 ]
Zeng, Lubin [1 ]
Faulkner, Grahame [1 ]
Lee, Kyungwoo [2 ]
Jung, Daekwang [2 ]
Oh, YunJe [2 ]
Won, Eun Tae [2 ]
机构
[1] Univ Oxford, Dept Engn Sci, Parks Rd, Oxford OX1 3PJ, England
[2] Samsung Elect Co Ltd, Telecommun R&D Ctr, Suwon, South Korea
来源
FREE - SPACE LASER COMMUNICATIONS VIII | 2008年 / 7091卷
关键词
Visible light communications; optical wireless; solid-state lighting;
D O I
10.1117/12.799503
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
The rapid improvement in the efficiency of-solid-state lighting has led to predictions that it will be the dominant source C, 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.
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页数:9
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