M-QAM transmission over hybrid microwave photonic links at the K-band

Nguyen, Dong-Nhat, Bohata, Jan, Spacil, Jan, Dousek, Daniel, Komanec, Matej, Zvanovec, Stanislav, Ghassemlooy, Zabih and Ortega, Beatriz (2019) M-QAM transmission over hybrid microwave photonic links at the K-band. Optics Express, 27 (23). p. 33745. ISSN 1094-4087

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Official URL: https://doi.org/10.1364/oe.27.033745


Two experimental configurations of a hybrid K-band (25 GHz) microwave photonic link (MPL) are investigated for seamless broadband wireless access networks. Experimental configurations consist of optical fiber, free-space optics (FSO) and radio frequency (RF) wireless channels. We analyze in detail the effects of channel impairments, namely fiber chromatic dispersion, atmospheric turbulence and multipath-induced fading on the transmission performance. In the first configuration, transmission of the 64-quadrature amplitude modulation (QAM) signal with 5, 20 and 50 MHz bandwidths over 5 km standard single-mode fiber (SSMF), 2 m turbulent FSO and 3 m RF wireless channels is investigated. We show that, for QAM with a high bandwidth, the link performance is being affected more by atmospheric turbulence. In the second configuration, the 20 MHz 4/16/64-QAM signals over a 50 km SSMF and 40 m FSO/RF wireless links are successfully transmitted with the measured error vector magnitude (EVM) values of 12, 9 and 7.9%, respectively. It is shown that, for all transmitted microwave vector signals, the bit error rate is lower than the hard-decision forward-error-correction limit of 3.8×10−3. Moreover, an extended FSO link span of 500 m for 25 GHz hybrid MPL with 16-QAM at 10 Gb/s under the weak and strong turbulence regimes is evaluated via simulation analysis to mimic a practical outdoor system.

Item Type: Article
Subjects: F200 Materials Science
F300 Physics
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 04 Nov 2019 17:24
Last Modified: 31 Jul 2021 20:35
URI: http://nrl.northumbria.ac.uk/id/eprint/41356

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