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A 3-Gb/s Single-LED OFDM-Based Wireless VLC Link Using a Gallium Nitride \mu{\rm LED}

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13 Author(s)
Tsonev, D. ; Inst. for Digital Commun., Univ. of Edinburgh, Edinburgh, UK ; Hyunchae Chun ; Rajbhandari, S. ; McKendry, J.J.D.
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This letter presents a visible light communication (VLC) system based on a single 50- μm gallium nitride light emitting diode (LED). A device of this size exhibits a 3-dB modulation bandwidth of at least 60 MHz - significantly higher than commercially available white lighting LEDs. Orthogonal frequency division multiplexing is employed as a modulation scheme. This enables the limited modulation bandwidth of the device to be fully used. Pre- and postequalization techniques, as well as adaptive data loading, are successfully applied to achieve a demonstration of wireless communication at speeds exceeding 3 Gb/s. To date, this is the fastest wireless VLC system using a single LED.

Published in:

Photonics Technology Letters, IEEE  (Volume:26 ,  Issue: 7 )