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

Wasiu O. Popoola, Zabih Ghassemlooy, Brian Stewart

Research output: Contribution to conferenceOther

10 Citations (Scopus)


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


ConferenceIEEE International Conference on Communication Workshop, ICCW 2015
Country/TerritoryUnited Kingdom


  • 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

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