Exploiting Equalization Techniques for Improving Data Rates in Organic Optoelectronic Devices for Visible Light Communications

Author

Haigh, Paul Anthony ; Ghassemlooy, Zabih ; Le Minh, Hoa ; Rajbhandari, Sujan ; Arca, Francesco ; Tedde, Sandro Francesco ; Hayden, Oliver ; Papakonstantinou, Ioannis

Author_Institution

Opt. Commun. Res. Group, Northumbria Univ., Newcastle upon Tyne, UK

Volume

30

Issue

19

fYear

2012

Firstpage

3081

Lastpage

3088

Abstract

This paper presents the use of equalization techniques in visible light communication (VLC) systems in order to increase the data rate. Here we investigate two VLC links a silicon (Si) light emitting diode (LED) and an organic photodetector (OPD), and an organic LED (OLED) plus an Si photodetector (PD), together with three equalization schemes of an RC high pass equalizer, a fractionally spaced zero-forcing equalizer (ZF) and an artificial neural network (ANN). In addition we utilize a pre-distortion scheme to enhance the performance of the digital equalizers. For both systems the bit rate achieved are 750 kb/s from a raw bandwidth (BW) of 30 kHz and 550 kb/s from a raw BW of 93 kHz.

Keywords

equalisers; neural nets; optical communication equipment; optical links; optoelectronic devices; organic light emitting diodes; photodetectors; OLED; artificial neural network; bandwidth 30 kHz; bandwidth 93 kHz; bit rate 550 kbit/s; bit rate 750 kbit/s; data rates; digital equalizer; equalization techniques; light emitting diode; organic LED; organic optoelectronic devices; organic photodetector; spaced zero-forcing equalizer; visible light communications; Artificial neural networks; Equalizers; Noise; Organic light emitting diodes; Silicon; Equalizers; organic light-emitting diodes (OLEDs); organic photodetector (OPD); visible light communications (VLC);

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2012.2210028

Filename

6249708