Modulations for Visible Light Communications With Dimming Control

被引：185

作者：

Lee, Kwonhyung ^{[1
]}

Park, Hyuncheol ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Elect Engn, Taejon 305701, South Korea

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2011年 / 23卷 / 16期

关键词：

Light-emitting diode (LED)-lighting; optical wireless communications; spectral reflectance; visible light communications (VLCs);

D O I：

10.1109/LPT.2011.2157676

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Visible light communication (VLC) uses solid-state lightings to transmit information; therefore, it is necessary that modulation schemes for VLC provide dimming control. In this letter, we propose a multiple pulse position modulation (MPPM) to offer both functions of modulating data-stream and controlling the brightness at the same time. According to the dimming level, we control the number of pulses of MPPM in one symbol duration. We analyze communication performance in terms of the normalized power requirement and spectral efficiency. From our studies, we show that MPPM is superior to variable on-off keying (VOOK) and variable pulse position modulation (VPPM) proposed in the IEEE 802.15 VLC task group.

引用

页码：1136 / 1138

页数：3