Energy-efficient lighting and communications

Z. Zhou, Mohsen Kavehrad, P. Deng

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

5 Scopus citations

Abstract

As Light-Emitting Diode (LED)'s increasingly displace incandescent lighting over the next few years, general applications of Visible Light Communication (VLC) technology are expected to include wireless internet access, vehicle-to-vehicle communications, broadcast from LED signage, and machine-to-machine communications. An objective in this paper is to reveal the influence of system parameters on the power distribution and communication quality, in a general plural sources VLC system. It is demonstrated that sources' Half-Power Angles (HPA), receivers' Field-Of Views (FOV), sources layout and the power distribution among sources are significant impact factors. Based on our findings, we developed a method to adaptively change working status of each LED respectively according to users' locations. The program minimizes total power emitted while simultaneously ensuring sufficient light intensity and communication quality for each user. The paper also compares Orthogonal Frequency-Division Multiplexing (OFDM) and On-Off Keying (OOK) signals performance in indoor optical wireless communications. The simulation is carried out for different locations where different impulse response distortions are experienced. OFDM seems a better choice than prevalent OOK for indoor VLC due to its high resistance to multi-path effect and delay spread. However, the peak-to-average power limitations of the method must be investigated for lighting LEDs.

Original languageEnglish (US)
Title of host publicationBroadband Access Communication Technologies VI
DOIs
StatePublished - Feb 13 2012
EventBroadband Access Communication Technologies VI - San Francisco, CA, United States
Duration: Jan 24 2012Jan 26 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8282
ISSN (Print)0277-786X

Other

OtherBroadband Access Communication Technologies VI
CountryUnited States
CitySan Francisco, CA
Period1/24/121/26/12

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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