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  • Journal of Lightwave Technology
  • Vol. 30,
  • Issue 19,
  • pp. 3081-3088
  • (2012)

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

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

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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.

© 2012 Crown

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