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

Wasiu O. Popoola, Zabih Ghassemlooy, Brian Stewart

Research output: Contribution to conferenceOther

9 Citations (Scopus)

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
Pages1322-1326
Number of pages5
DOIs
Publication statusPublished - 14 Sep 2015
EventIEEE International Conference on Communication Workshop, ICCW 2015 - London, United Kingdom
Duration: 8 Jun 201512 Jun 2015

Conference

ConferenceIEEE International Conference on Communication Workshop, ICCW 2015
CountryUnited Kingdom
CityLondon
Period8/06/1512/06/15

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Keywords

  • bandwidth
  • frequency division multiplexing
  • light
  • light emitting diodes
  • optical communication
  • throughput
  • visible light communication, High throughput
  • optical orthogonal frequency division multiplexing (OFDM)
  • peak to average power ratio
  • phase rotation
  • pilot symbols
  • sampling rates
  • system bandwidth
  • visible light communications (VLC), Orthogonal frequency division multiplexing

Cite this

Popoola, W. O., Ghassemlooy, Z., & Stewart, B. (2015). Optimising OFDM based visible light communication for high throughput and reduced PAPR. 1322-1326. IEEE International Conference on Communication Workshop, ICCW 2015, London, United Kingdom. https://doi.org/10.1109/ICCW.2015.7247361