QPSK modulation for AC-power-signal-biased visible light communication system

Yu Feng Liu*, Chien Hung Yeh, Chi-Wai Chow, Yang Liu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

With the integration of light emitting diode (LED), visible light communication (VLC) can provide wireless communication link using the lightning system. Due to the consideration of power efficiency, AC-LED has the design of reducing energy waste with alternating current from the power outlet. In this work, we propose an AC-power-signalbiased system that provides communication on both DC-LED and AC-LED. The bias circuit is designed to combine ACpower signal and the message signal with QPSK format. This driving scheme needs no AC-to-DC converters and it is suitable for driving AC LED. Synchronization is completed to avoid threshold effect of LED.

Original languageEnglish
Title of host publicationBroadband Access Communication Technologies VII
DOIs
StatePublished - 10 Apr 2013
EventBroadband Access Communication Technologies VII - San Francisco, CA, United States
Duration: 5 Feb 20137 Feb 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8645
ISSN (Print)0277-786X

Conference

ConferenceBroadband Access Communication Technologies VII
CountryUnited States
CitySan Francisco, CA
Period5/02/137/02/13

Keywords

  • AC-LED
  • Light emitting diode (LED)
  • QPSK
  • Visible Light Communication
  • Wireless

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  • Cite this

    Liu, Y. F., Yeh, C. H., Chow, C-W., & Liu, Y. (2013). QPSK modulation for AC-power-signal-biased visible light communication system. In Broadband Access Communication Technologies VII [86450L] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8645). https://doi.org/10.1117/12.2002030