The University of Southampton
University of Southampton Institutional Repository

Asymmetrical hybrid optical OFDM for visible light communications with dimming control

Asymmetrical hybrid optical OFDM for visible light communications with dimming control
Asymmetrical hybrid optical OFDM for visible light communications with dimming control
This letter proposes an asymmetrical hybrid optical orthogonal frequency division multiplexing (AHO-OFDM) scheme for dimmable visible light communication systems. In the proposed scheme, either asymmetrically clipped optical OFDM (ACO-OFDM) or pulse-amplitude-modulated discrete multitone (PAM-DMT) signal is inverted and then both the signals are combined for transmission, where pulsewidth modulation is no longer required for dimming control. The power of ACO-OFDM and PAM-DMT signals is adjusted so that the amplitude of the combined AHO-OFDM signal is asymmetrical, which could utilize all the available subcarriers as well as the entire dynamic range of light-emitting diodes with various dimming levels. Simulation results show that the proposed scheme could achieve a wide dimming range with a small throughput fluctuation.
1041-1135
974-977
Wang, Qi
ddfc62a2-708c-43b1-8eed-d68d4e87d96a
Wang, Zhaocheng
a6bc4037-d26d-4ddd-9ce5-f018980115b6
Dai, Linglong
a3b9a8e1-777f-4196-a388-969444c7239d
Wang, Qi
ddfc62a2-708c-43b1-8eed-d68d4e87d96a
Wang, Zhaocheng
a6bc4037-d26d-4ddd-9ce5-f018980115b6
Dai, Linglong
a3b9a8e1-777f-4196-a388-969444c7239d

Wang, Qi, Wang, Zhaocheng and Dai, Linglong (2015) Asymmetrical hybrid optical OFDM for visible light communications with dimming control. IEEE Photonics Technology Letters, 27 (9), 974-977. (doi:10.1109/LPT.2015.2404972).

Record type: Article

Abstract

This letter proposes an asymmetrical hybrid optical orthogonal frequency division multiplexing (AHO-OFDM) scheme for dimmable visible light communication systems. In the proposed scheme, either asymmetrically clipped optical OFDM (ACO-OFDM) or pulse-amplitude-modulated discrete multitone (PAM-DMT) signal is inverted and then both the signals are combined for transmission, where pulsewidth modulation is no longer required for dimming control. The power of ACO-OFDM and PAM-DMT signals is adjusted so that the amplitude of the combined AHO-OFDM signal is asymmetrical, which could utilize all the available subcarriers as well as the entire dynamic range of light-emitting diodes with various dimming levels. Simulation results show that the proposed scheme could achieve a wide dimming range with a small throughput fluctuation.

PDF
07046383.pdf - Accepted Manuscript
Download (486kB)

More information

Accepted/In Press date: 16 February 2015
e-pub ahead of print date: 20 February 2015
Published date: 1 May 2015
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 400623
URI: https://eprints.soton.ac.uk/id/eprint/400623
ISSN: 1041-1135
PURE UUID: 973af4df-fb48-4398-b9c1-92fa6888981f

Catalogue record

Date deposited: 19 Sep 2016 15:42
Last modified: 17 Jul 2017 18:11

Export record

Altmetrics

Contributors

Author: Qi Wang
Author: Zhaocheng Wang
Author: Linglong Dai

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×