A Multi-CAP Visible-Light Communications System with 4.85-b/s/Hz Spectral Efficiency

Paul Anthony Haigh, Andrew Burton, Khald Werfli, Hoa Le Minh, Edward Bentley, Petr Chvojka, Wasiu O. Popoola, Ioannis Papakonstantinou, Stanislav Zvanovec

Research output: Contribution to journalArticle (Academic Journal)peer-review

92 Citations (Scopus)


In this paper, we experimentally demonstrate a multiband carrierless amplitude and phase modulation format for the first time in VLC. We split a conventional carrierless amplitude and phase modulated signal into m subcarriers in order to protect from the attenuation experienced at high frequencies in low-pass VLC systems. We investigate the relationship between throughput/spectral efficiency and m, where m = {10, 8, 6, 4, 2, 1} subcarriers over a fixed total signal bandwidth of 6.5 MHz. We show that transmission speeds (spectral efficiencies) of 31.53 (4.85), 30.88 (4.75), 25.40 (3.90), 23.65 (3.60), 15.78 (2.40), and 9.04 (1.40) Mb/s (b/s/Hz) can be achieved for the listed values of m, respectively.

Original languageEnglish
Article number7112468
Pages (from-to)1771-1779
Number of pages9
JournalIEEE Journal on Selected Areas in Communications
Issue number9
Publication statusPublished - 1 Sept 2015


  • Bit error rate
  • equalizers
  • light emitting diodes
  • Visible light communications


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