Pesek, P;
Zvanovec, S;
Chvojka, P;
Ghassemlooy, Z;
Haigh, PA;
(2019)
Demonstration of a Hybrid FSO/VLC Link for the Last Mile and Last Meter Networks.
IEEE Photonics Journal
, 11
(1)
10.1109/JPHOT.2018.2886645.
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Abstract
OAPA In this paper, a hybrid free-space optical and visible light communication (FSO/VLC) system was experimentally demonstrated as a solution to overcome the last mile and last meter access networks bandwidth bottleneck. We evaluate the system performance of a multiband carrier-less amplitude and phase (<formula><tex>$\textit{m}$</tex></formula>-CAP) modulation scheme for a range of FSO/VLC link lengths and <formula><tex>$\textit{m}$</tex></formula>-CAP parameters (i.e., the roll-off factor of the filters and a number of subcarriers) in terms of the data rate <formula><tex>$R_b$</tex></formula> (i.e., spectral efficiency). We show that for the configuration with a 1 m VLC link the \mbox{10-CAP} offers more than a 40% improvement in the measured <formula><tex>$R_b$</tex></formula> compared to 2-CAP for the same bit error rate target. The $R_b$ penalty due to the extension of a VLC link span from 1 m to 3 m reaches to 12.6 Mb/s for the <formula><tex>$\mbox{10-\text{CAP}}$</tex></formula> scheme (i.e., <formula><tex>$\sim$</tex></formula>39% degradation in <formula><tex>$R_b$</tex></formula>). To fully cover all aspects of the hybrid FSO/VLC system, we also investigate the atmospheric turbulence effect on the 500 m FSO link where <formula><tex>$R_b$</tex></formula> is decreased by 30% for the refractive index structure parameter <formula><tex>$C_n^2$</tex></formula> of <formula><tex>$\mbox{2.4$</tex></formula>\times<formula><tex>$10^{\minus15}$</tex></formula> m<formula><tex>$^{\minus2/3}$</tex></formula>} compared to a clear channel condition.
| Type: | Article |
|---|---|
| Title: | Demonstration of a Hybrid FSO/VLC Link for the Last Mile and Last Meter Networks |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/JPHOT.2018.2886645 |
| Publisher version: | https://doi.org/10.1109/JPHOT.2018.2886645 |
| Language: | English |
| Additional information: | © 2019, IEEE. Published under IEEE Open Access Licence. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Meters , Light emitting diodes , Bandwidth , Quadrature amplitude modulation , Lenses , Holography , Holographic optical components, Visible light communication , free space optics , multiband carrier-less amplitude and phase modulation |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10065204 |
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