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

Author

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

Author_Institution

Fac. of Eng., Univ. of Bristol, Bristol, UK

Volume

33

Issue

9

fYear

2015

Firstpage

1771

Lastpage

1779

Abstract

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.

Keywords

amplitude modulation; optical communication; phase modulation; bandwidth 6.5 MHz; conventional carrierless amplitude modulated signal; low-pass VLC systems; multiCAP visible-light communications; phase modulated signal; spectral efficiency; Bandwidth; Bit error rate; Light emitting diodes; Modulation; OFDM; Receivers; Signal to noise ratio; Bit error rate; equalizers; light emitting diodes; visible light communications;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/JSAC.2015.2433053

Filename

7112468