The University of Southampton
University of Southampton Institutional Repository

Accuracy of the point-source model of a multi-LED array in high-speed visible light communication channel characterization

Accuracy of the point-source model of a multi-LED array in high-speed visible light communication channel characterization
Accuracy of the point-source model of a multi-LED array in high-speed visible light communication channel characterization
During the procedure of indoor visible light communication (VLC) channel modeling, the transmitter constituted by an array of LEDs is frequently modeled as single point-source for convenience. But how accurate this simplified treatment is remains unanswered. This paper compares the channel characteristics of both the simplified point-source model and six practical cases having various numbers of LEDs. Our numerical results show that the deviations in terms of the channel’s optical path loss (OPL) as well as its bandwidth and the channel’s delay spread are increased steadily upon increasing the number of LEDs of each transmitter, until LEDs spread almost over the entire ceiling. Even in the worst case, the deviation of the OPL remains below 0.41 dBo, while that of the 3-dB transmission bandwidth is below 1.67 MHz. However, the deviation in terms of the root mean square (RMS) delay spread can reach 1.88 ns. Moreover, in terms of spatial distribution of the RMS delay spread, there is a non-negligible difference between the simplified point-source model and different transmitter configurations.
visible light communication, channel characterization, modeling accuracy, point-source model
1943-0655
1-14
Ding, J.
3c8f054d-a84e-4f16-9767-c76364a1b5a2
Xu, Z.
797f8b0e-a035-4cf9-ac3f-99098a3fdb50
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Ding, J.
3c8f054d-a84e-4f16-9767-c76364a1b5a2
Xu, Z.
797f8b0e-a035-4cf9-ac3f-99098a3fdb50
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Ding, J., Xu, Z. and Hanzo, L. (2015) Accuracy of the point-source model of a multi-LED array in high-speed visible light communication channel characterization. IEEE Photonics Journal, 7 (4), 1-14. (doi:10.1109/JPHOT.2015.2450534).

Record type: Article

Abstract

During the procedure of indoor visible light communication (VLC) channel modeling, the transmitter constituted by an array of LEDs is frequently modeled as single point-source for convenience. But how accurate this simplified treatment is remains unanswered. This paper compares the channel characteristics of both the simplified point-source model and six practical cases having various numbers of LEDs. Our numerical results show that the deviations in terms of the channel’s optical path loss (OPL) as well as its bandwidth and the channel’s delay spread are increased steadily upon increasing the number of LEDs of each transmitter, until LEDs spread almost over the entire ceiling. Even in the worst case, the deviation of the OPL remains below 0.41 dBo, while that of the 3-dB transmission bandwidth is below 1.67 MHz. However, the deviation in terms of the root mean square (RMS) delay spread can reach 1.88 ns. Moreover, in terms of spatial distribution of the RMS delay spread, there is a non-negligible difference between the simplified point-source model and different transmitter configurations.

Text
jphot-hanzo-2450534-proof.pdf - Accepted Manuscript
Download (1MB)

More information

Accepted/In Press date: 24 June 2015
Published date: August 2015
Keywords: visible light communication, channel characterization, modeling accuracy, point-source model

Identifiers

Local EPrints ID: 378882
URI: http://eprints.soton.ac.uk/id/eprint/378882
ISSN: 1943-0655
PURE UUID: 565e866c-ee0a-4047-ab01-491032e11d54
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 10 Jul 2015 08:46
Last modified: 18 Feb 2021 17:14

Export record

Altmetrics

Contributors

Author: J. Ding
Author: Z. Xu ORCID iD
Author: L. Hanzo ORCID iD

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 http://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.

×