VLC system performance using Dicode Pulse Position Modulation over an indoor diffuse link

Author

Buhafa, Adel M. ; Al-Nedawe, Basman M. ; Sibley, Martin J. N. ; Mather, Peter J.

Author_Institution

Sch. of Comput. & Eng., Univ. of Huddersfield, Huddersfield, UK

fYear

2014

fDate

25-27 Nov. 2014

Firstpage

605

Lastpage

608

Abstract

Dicode Pulse Position Modulation (DiPPM) has been proposed as an alternative modulation scheme to digital PPM over optical fibre channels. This paper, for the first time, analyses the receiver sensitivity of the DiPPM system on a diffuse indoor Visible Light Communication (VLC). The system operates at a bit rate of 1Gbit/s and λ = 0.65 μm. A mathematical model of the VLC using DiPPM is presented. The results show the degradation in sensitivity as normalized delay spreads increase. It is shown that with a typical delay spread of 5 ns, the DiPPM system can achieve a sensitivity of -36.47 dBm and -37.5 dBm for the error rates of 10^-9 and 10^-6, respectively. This represents a sensitivity improvement over a comparable digital PPM system by 3.47 dB and 3.5 dB.

Keywords

indoor communication; optical links; optical modulation; optical receivers; pulse position modulation; DiPPM system; VLC system performance; bit rate 1 Gbit/s; dicode pulse position modulation; digital PPM system; gain 3.47 dB; gain 3.5 dB; indoor diffuse link; mathematical model; optical fibre channels; receiver sensitivity; time 5 ns; visible light communication; wavelength 0.65 mum; Delays; Modulation; Optical fibers; Optical pulses; Optical receivers; Sensitivity; DiPPM; PPM; VLC; delay spread; optical diffuse link; receiver sensitivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Forum Telfor (TELFOR), 2014 22nd

Conference_Location

Belgrade

Print_ISBN

978-1-4799-6190-0

Type

conf

DOI

10.1109/TELFOR.2014.7034482

Filename

7034482