Optimising OFDM based visible light communication for high throughput and reduced PAPR

Waisu Popoola, Zabih Ghassemlooy, Brian Stewart

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

Abstract

In order to circumvent the throughput limitation imposed on visible light communication (VLC) systems by the limited LED bandwidth, optical orthogonal frequency division multiplexing (OFDM) with non-uniform bit-loading is studied in this paper. By using lower order modulation on subcarriers that suffer the most distortion, we show that it is possible to establish a high throughput and reliable OFDM based VLC link at a sampling rate of six times the available system bandwidth. The high signal peak-to-average-power-ratio (PAPR) that accompanies the OFDM signal is however reduced by adopting the pilot symbol phase rotation technique previously proposed by the authors. With this, over 4 dB reduction in the electrical PAPR is attainable. This combined approach thus make it possible to achieve high throughput without incurring the high PAPR penalties.
Original languageEnglish
Title of host publicationProceedings of the IEEE International Conference on Communications, Communication Workshop (ICCW 15)
PublisherIEEE
Pages1322-1326
Number of pages5
DOIs
Publication statusPublished - Jun 2015

Keywords

  • visible light communication
  • OFDM
  • electrical PAPR

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    Popoola, W., Ghassemlooy, Z., & Stewart, B. (2015). Optimising OFDM based visible light communication for high throughput and reduced PAPR. In Proceedings of the IEEE International Conference on Communications, Communication Workshop (ICCW 15) (pp. 1322-1326). IEEE. https://doi.org/10.1109/ICCW.2015.7247361