Experimental comparison of DSB and CS-DSB mmW formats over a hybrid fiber and FSO fronthaul network for 5G

Bohata, J., Nguyen, D. N., Spáčil, J., Komanec, M., Ortega, B., Vallejo, L., Ghassemlooy, Zabih and Zvánovec, S. (2021) Experimental comparison of DSB and CS-DSB mmW formats over a hybrid fiber and FSO fronthaul network for 5G. Optics Express, 29 (17). p. 27768. ISSN 1094-4087

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Official URL: https://doi.org/10.1364/oe.434334


The telecommunication world is experiencing the 5th generation (5G) networks deployment including the use of millimeter wave (mmW) frequency bands to satisfy capacity demands. This leads to the extensive use of optical communications, especially the optical fiber connectivity at the last mile access and the edge networks. In this paper we outline fiber and free space optics (FSO) technologies for use as part of the 5G optical fronthaul network. We investigate two different mmW transmission schemes based on (i) the conventional analog radio over fiber transmission using one Mach-Zehnder modulator (MZM) with double sideband (DSB) optical modulation, and (ii) an optical-based frequency doubling with one MZM biased at the null point to introduce carrier suppression DSB (CS DSB) transmission and second MZM used for data modulation. Both systems are assessed in terms of the error vector magnitude, signal-to-noise ratio, dynamic range and phase noise. We consider a configuration for the fronthaul network in the frequency range 2 (FR2) at 27 and 39 GHz with the scale of bandwidth up to 400 MHz with M-quadrature amplitude modulation and quadrature phase shift keying. Results are also shown for FR1 at 3.5 GHz. Moreover, we investigate for the first time the 5G new radio signal transmission under strong turbulence conditions and show the turbulence-induced FSO link impairment. We finally demonstrate the CS DSB scheme performs well under chromatic dispersion-induced fading for the frequency up to 40 GHz and single mode fiber length of 30 km, whereas the DSB format seems more appropriate for an antenna seamless transmission.

Item Type: Article
Additional Information: © 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement Funding information: European Cooperation in Science and Technology (CA19111); Ministerstvo Průmyslu a Obchodu (FV40089); České Vysoké Učení Technické v Praze (SGS20/166/OHK3/3T/13).
Subjects: F300 Physics
H600 Electronic and Electrical Engineering
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 25 Aug 2021 08:10
Last Modified: 25 Aug 2021 08:15
URI: http://nrl.northumbria.ac.uk/id/eprint/46992

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