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Article

A 5G C-RAN Optical Fronthaul Architecture for Hotspot Areas Using OFDM-Based Analog IFoF Waveforms

1
Department of Informatics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
2
LioniX International B.V., 7500 AL Enschede, The Netherlands
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(19), 4059; https://doi.org/10.3390/app9194059
Received: 1 July 2019 / Revised: 25 September 2019 / Accepted: 26 September 2019 / Published: 28 September 2019
(This article belongs to the Special Issue Photonic Technology in 5G)
Analog fronthauling is currently promoted as a bandwidth and energy-efficient solution that can meet the requirements of the Fifth Generation (5G) vision for low latency, high data rates and energy efficiency. In this paper, we propose an analog optical fronthaul 5G architecture, fully aligned with the emerging Centralized-Radio Access Network (C-RAN) concept. The proposed architecture exploits the wavelength division multiplexing (WDM) technique and multicarrier intermediate-frequency-over-fiber (IFoF) signal generation per wavelength in order to satisfy the demanding needs of hotspot areas. Particularly, the fronthaul link employs photonic integrated circuit (PIC)-based WDM optical transmitters (Txs) at the baseband unit (BBU), while novel reconfigurable optical add-drop multiplexers (ROADMs) cascaded in an optical bus are used at the remote radio head (RRH) site, to facilitate reconfigurable wavelength switching functionalities up to 4 wavelengths. An aggregate capacity of 96 Gb/s has been reported by exploiting two WDM links carrying multi-IF band orthogonal frequency division multiplexing (OFDM) signals at a baud rate of 0.5 Gbd with sub-carrier (SC) modulation of 64-QAM. All signals exhibited error vector magnitude (EVM) values within the acceptable 3rd Generation Partnership Project (3GPP) limits of 8%. The longest reach to place the BBU away from the hotspot was also investigated, revealing acceptable EVM performance for fiber lengths up to 4.8 km. View Full-Text
Keywords: 5G networks; analog intermediate-frequency-over-fiber; optical fronthaul; multicarrier communication; OFDM; PIC-based transmitter; ROADM 5G networks; analog intermediate-frequency-over-fiber; optical fronthaul; multicarrier communication; OFDM; PIC-based transmitter; ROADM
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MDPI and ACS Style

Mitsolidou, C.; Vagionas, C.; Mesodiakaki, A.; Maniotis, P.; Kalfas, G.; G. H. Roeloffzen, C.; W. L. van Dijk, P.; M. Oldenbeuving, R.; Miliou, A.; Pleros, N. A 5G C-RAN Optical Fronthaul Architecture for Hotspot Areas Using OFDM-Based Analog IFoF Waveforms. Appl. Sci. 2019, 9, 4059. https://doi.org/10.3390/app9194059

AMA Style

Mitsolidou C, Vagionas C, Mesodiakaki A, Maniotis P, Kalfas G, G. H. Roeloffzen C, W. L. van Dijk P, M. Oldenbeuving R, Miliou A, Pleros N. A 5G C-RAN Optical Fronthaul Architecture for Hotspot Areas Using OFDM-Based Analog IFoF Waveforms. Applied Sciences. 2019; 9(19):4059. https://doi.org/10.3390/app9194059

Chicago/Turabian Style

Mitsolidou, Charoula, Christos Vagionas, Agapi Mesodiakaki, Pavlos Maniotis, George Kalfas, Chris G. H. Roeloffzen, Paul W. L. van Dijk, Ruud M. Oldenbeuving, Amalia Miliou, and Nikos Pleros. 2019. "A 5G C-RAN Optical Fronthaul Architecture for Hotspot Areas Using OFDM-Based Analog IFoF Waveforms" Applied Sciences 9, no. 19: 4059. https://doi.org/10.3390/app9194059

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