Modulations for Visible Light Communications With Dimming Control

Author

Lee, Kwonhyung ; Park, Hyuncheol

Author_Institution

Dept. of Electr. Eng., KAIST, Daejeon, South Korea

Volume

23

Issue

16

fYear

2011

Firstpage

1136

Lastpage

1138

Abstract

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.

Keywords

amplitude shift keying; brightness; data communication; lighting; optical modulation; optical transmitters; visible spectra; brightness; data-stream modulation; dimming control; information transmission; multiple pulse position modulation; short-range optical wireless communication system; solid-state lightings; spectral efficiency; variable on-off keying; variable pulse position modulation; visible light communications; Brightness; Light emitting diodes; Lighting; Modulation; Optical pulses; Optical receivers; Optical transmitters; Light-emitting diode (LED)-lighting; optical wireless communications; spectral reflectance; visible light communications (VLCs);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2157676

Filename

5773477