A 3Gb/s single-LED OFDM-based wireless VLC link using a gallium nitride µLED

Dobroslav Tsonev, Hyunchae Chun, Sujan Rajbhandari, Jonathan J. D. McKendry, Stefan Videv, Erdan Gu, Mohsin Haji, Scott Watson, Anthony E. Kelly, Graheme Faulkner, Martin D. Dawson, Harald Haas, Dominic O'Brien

Research output: Contribution to journalArticle

492 Citations (Scopus)

Abstract

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. Index
Original languageEnglish
Pages (from-to)637-640
Number of pages4
JournalIEEE Photonics Technology Letters
Volume26
Issue number7
Early online date6 Jan 2014
DOIs
Publication statusPublished - 1 Apr 2014

Keywords

  • OFDM
  • visible light communication
  • optical modulation
  • optical wireless communication
  • bandwidth
  • light emitting diodes
  • loading
  • modulation
  • signal to noise ratio
  • wireless communication

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