Multi-LED Phase-Shifted OOK Modulation Based Visible Light Communication Systems

Author

Dong-Fang Zhang ; Yi-Jun Zhu ; Yan-Yu Zhang

Author_Institution

Zhengzhou Inf. Sci. & Technol. Inst., Zhengzhou, China

Volume

25

Issue

23

fYear

2013

fDate

Dec.1, 2013

Firstpage

2251

Lastpage

2254

Abstract

The limited modulation bandwidth and the non-linearity nature of LEDs are the key challenges to visible light communication. In general, one LED lamp consists of multiple LED chips. In this letter, these LED chips are used for parallel transmission though multi-LED phase-shifted OOK (MP-OOK) modulation. For MP-OOK, the bandwidth efficiency is approximate N times that of conventional OOK ( N is the number of LED chips). For each branch, the modulation format is OOK. Hence, MP-OOK has a better anti-nonlinearity performance than other high-order modulation formats, such as DC-biased optical orthogonal frequency-division multiplexing (DCO-OFDM). The simulation comparisons between MP-OOK and DCO-OFDM verify these.

Keywords

OFDM modulation; amplitude shift keying; light emitting diodes; optical communication equipment; optical modulation; DC-biased optical orthogonal frequency-division multiplexing; DCO-OFDM; MP-OOK; OOK; bandwidth efficiency; high-order modulation formats; limited modulation bandwidth; multiLED phase-shifted OOK modulation; visible light communication systems; Bandwidth; High-speed optical techniques; Light emitting diodes; Modulation; OFDM; Receivers; Wireless communication; Light-emitting diode (LED); bandwidth efficiency; modulation bandwidth; multi-LED phase-shifted OOK (MP-OOK); nonlinearity; visible light communication (VLC);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2283583

Filename

6612714