We propose and experimentally demonstrate the first bi-directional optical wireless link operating in non-direct line-of-sight (Nd-LOS). The system is based on visible light emitting diode (LED) for downlink and infrared LED for uplink. We achieve around 250 Mbit/s for both downstream and upstream transmission, with the ambient light noise of usual indoor illumination level (500 lx), produced by warm-white LED. 100 Mbit/s are guaranteed inside 12 m$^{2}$ of a common room scenario, without LOS tracking. An optimized discrete multi-tone modulation gives bit-error-ratios always below of the common forward-error-correction threshold of 1.5 ×10$^{-3}$. These results indicate that this scheme has great potential for practical VLC system implementation.

High-Speed Bi-directional Optical Wireless System in Non-Directed Line-of-Sight Configuration

COSSU, GIULIO;CORSINI, Raffaele;CIARAMELLA, ERNESTO
2014-01-01

Abstract

We propose and experimentally demonstrate the first bi-directional optical wireless link operating in non-direct line-of-sight (Nd-LOS). The system is based on visible light emitting diode (LED) for downlink and infrared LED for uplink. We achieve around 250 Mbit/s for both downstream and upstream transmission, with the ambient light noise of usual indoor illumination level (500 lx), produced by warm-white LED. 100 Mbit/s are guaranteed inside 12 m$^{2}$ of a common room scenario, without LOS tracking. An optimized discrete multi-tone modulation gives bit-error-ratios always below of the common forward-error-correction threshold of 1.5 ×10$^{-3}$. These results indicate that this scheme has great potential for practical VLC system implementation.
2014
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11382/442975
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