TY - JOUR
T1 - Chaos synchronization in visible light communications with variable delays induced by multipath fading
AU - Canyelles-Pericas, Pep
AU - Haigh, Paul
AU - Ghassemlooy, Zabih
AU - Burton, Andrew
AU - Dai, Xuewu
AU - The Son, Tran
AU - Le-Minh, Hoa
AU - Binns, Richard
AU - Busawon, Krishna
N1 - Funding Information:
Funding: This research was partly funded by EPSRC DTG grants EP/P505011/1, EP/P505623/1 and EP/J500276/1. This paper was also partly funded by the EPSRC grant EP/P006280/1: Multifunctional Polymer Light-Emitting Diodes with Visible Light Communications (MARVEL).
Funding Information:
Acknowledgments: The authors acknowledge Northumbria University for supporting this research. The authors thank Claudio R. Mirasso from the Institute for Cross Disciplinary Physics and Complex Systems (IFISC) at the University of the Balearic Islands (Spain) for fruitful discussions and relevant feedback.
Publisher Copyright:
© 2018 by the authors. Licensee MDPI, Basel, Switzerland.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2018/11/9
Y1 - 2018/11/9
N2 - Visible Light Communication (VLC) uses light-emitting diodes to provide wireless connectivity in public environments. Transmission security in this emerging channel is not trivial. Chaotic modulation techniques can provide encryption directly in the physical layer based on the random-alike evolution and strong synchronization prospect given by deterministic chaos. In secure chaotic inclusion or embedding methods, continuous-time chaos oscillator models need to be synchronized via a coupling carrier. Here we present a first numerical simulation study for the impact of the variable delays induced by line-of-sight and non-line-of-sight multipath fading in complete chaotic synchronization. More precisely, we analyze a chaotic Colpitts oscillator that is simultaneously transmitting the carrier to several mobile receivers via nine spotlights. Such induced delays depend on both the receiver position and the carrier frequency, influencing the complete synchronization required in modulation via chaotic inclusion. Correlation values for several receiver positions and carrier frequencies are presented, examining the progressive emergence of the multipath effect and its impact on chaotic synchronization. We show that, for the chaotic oscillator and coupling applied in the defined room settings, complete chaotic synchronization can be achieved and that it is robust up to the tens of MHz region.
AB - Visible Light Communication (VLC) uses light-emitting diodes to provide wireless connectivity in public environments. Transmission security in this emerging channel is not trivial. Chaotic modulation techniques can provide encryption directly in the physical layer based on the random-alike evolution and strong synchronization prospect given by deterministic chaos. In secure chaotic inclusion or embedding methods, continuous-time chaos oscillator models need to be synchronized via a coupling carrier. Here we present a first numerical simulation study for the impact of the variable delays induced by line-of-sight and non-line-of-sight multipath fading in complete chaotic synchronization. More precisely, we analyze a chaotic Colpitts oscillator that is simultaneously transmitting the carrier to several mobile receivers via nine spotlights. Such induced delays depend on both the receiver position and the carrier frequency, influencing the complete synchronization required in modulation via chaotic inclusion. Correlation values for several receiver positions and carrier frequencies are presented, examining the progressive emergence of the multipath effect and its impact on chaotic synchronization. We show that, for the chaotic oscillator and coupling applied in the defined room settings, complete chaotic synchronization can be achieved and that it is robust up to the tens of MHz region.
KW - visible light communication
KW - chaotic communication
KW - multipath channels
KW - nonlinear systems
KW - network security
KW - chaos synchronization
UR - http://www.scopus.com/inward/record.url?scp=85081746480&partnerID=8YFLogxK
U2 - 10.3390/asi1040045
DO - 10.3390/asi1040045
M3 - Article
SN - 2571-5577
VL - 1
SP - 1
EP - 13
JO - Applied System Innovation
JF - Applied System Innovation
IS - 4
M1 - 45
ER -