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Experimental evaluation of real-time sigma-delta radio over fiber system for fronthaul applications

Published online by Cambridge University Press:  09 September 2020

Muhammad Usman Hadi Open the ORCID record for Muhammad Usman Hadi [Opens in a new window] ,
Hyun Jung ,
Pier Andrea Traverso  and
Giovanni Tartarini
Muhammad Usman Hadi*
Affiliation:
Department of Electronic Systems, Aalborg University, Aalborg, Denmark
Hyun Jung
Affiliation:
DMC RAN, Nokia Bell Labs, SV, USA
Pier Andrea Traverso
Affiliation:
Department of Electronic and Information Engineering, University of Bologna, Viale Risorgimento 2, Bologna, Italy
Giovanni Tartarini
Affiliation:
Department of Electronic and Information Engineering, University of Bologna, Viale Risorgimento 2, Bologna, Italy
*
Author for correspondence: Muhammad Usman Hadi, E-mail: usmanh@es.aau.dk
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Abstract

Sigma-delta radio over fiber (ΣΔ-RoF) is an expedient technology for next-generation networks including 5G cloud/centralized radio access networks (C-RAN). In this article, we demonstrate a realistic experimental scenario for ΣΔ-RoF link targeting C-RAN fronthaul applications, by using baseband second-order 1-bit sigma-delta modulation (ΣΔ-M). The experimental set-up validates the LTE 20 MHz signals having modulation order of 256-quadrature amplitude modulation for a carrier frequency of 3 GHz, up to 10 km of standard single mode fiber. A detailed analysis of the ΣΔ-RoF system performance is reported by adjacent channel leakage ratio and error vector magnitude. Furthermore, an experimental study is evaluated where ΣΔ-RoF is compared with its counterparts. It is deduced that ΣΔ-RoF corroborates the present range of C-RAN fronthaul networks and can be a promising candidate for future mobile haul applications.

Keywords

Radio over fibersigma-delta modulation
Type
Microwave Photonics
Information
International Journal of Microwave and Wireless Technologies , Volume 13 , Issue 8 , October 2021 , pp. 756 - 765
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Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press in association with the European Microwave Association

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