Modeling the effect of non-linear distortion in a Centralized RAN with analog optical fronthaul

Main Authors: Dowhuszko, Alexis A., Pérez-Neira, Ana I.
Format: Proceeding eJournal
Bahasa: eng
Terbitan: , 2018
Online Access: https://zenodo.org/record/2530662
ctrlnum 2530662
fullrecord <?xml version="1.0"?> <dc schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd"><creator>Dowhuszko, Alexis A.</creator><creator>P&#xE9;rez-Neira, Ana I.</creator><date>2018-12-09</date><description>The Centralized Radio Access Network (C-RAN) architecture has potential to achieve the target goals that have been set for 5G. However, as the number of radio signals to be transported from the Centralized Base Station (CBS) to the distributed Remote Antenna Units (RAUs) grows, the use of contemporary digital fronthaul technologies (such as CPRI) complicates. One simple way to address this problem consists in multiplexing the baseband signals intended to the different RAUs in the frequency domain and, after that, use the resulting analog signal to modulate the intensity of the optical carrier. This way, there is no bandwidth expansion and the processing delay is kept low; however, as the ideal fronthaul assumption does not hold any more in this case, the impairments that the analog optical fronthaul introduces should be taken into account when performing the digital signal processing in transmission. In this paper, we focus on the non-linear distortion that the external Mach-Zehnder (optical) modulator introduces and, through it, estimate the End-to-End (E2E) performance when different intensity modulation indexes (or clipping ratios) are used. As expected, moderate levels of non-linear distortion are beneficial if properly selected according to the C-RAN configuration.</description><description>Grant numbers : TERESA - Hybrid TERrEstrial/Satellite Air Interface for 5G and Beyond (TEC2017-90093-C3-1-R).</description><identifier>https://zenodo.org/record/2530662</identifier><identifier>10.5281/zenodo.2530662</identifier><identifier>oai:zenodo.org:2530662</identifier><language>eng</language><relation>doi:10.5281/zenodo.2530661</relation><rights>info:eu-repo/semantics/openAccess</rights><rights>https://creativecommons.org/licenses/by/4.0/legalcode</rights><title>Modeling the effect of non-linear distortion in a Centralized RAN with analog optical fronthaul</title><type>Journal:Proceeding</type><type>Journal:Proceeding</type><recordID>2530662</recordID></dc>
language eng
format Journal:Proceeding
Journal
Journal:eJournal
author Dowhuszko, Alexis A.
Pérez-Neira, Ana I.
title Modeling the effect of non-linear distortion in a Centralized RAN with analog optical fronthaul
publishDate 2018
url https://zenodo.org/record/2530662
contents The Centralized Radio Access Network (C-RAN) architecture has potential to achieve the target goals that have been set for 5G. However, as the number of radio signals to be transported from the Centralized Base Station (CBS) to the distributed Remote Antenna Units (RAUs) grows, the use of contemporary digital fronthaul technologies (such as CPRI) complicates. One simple way to address this problem consists in multiplexing the baseband signals intended to the different RAUs in the frequency domain and, after that, use the resulting analog signal to modulate the intensity of the optical carrier. This way, there is no bandwidth expansion and the processing delay is kept low; however, as the ideal fronthaul assumption does not hold any more in this case, the impairments that the analog optical fronthaul introduces should be taken into account when performing the digital signal processing in transmission. In this paper, we focus on the non-linear distortion that the external Mach-Zehnder (optical) modulator introduces and, through it, estimate the End-to-End (E2E) performance when different intensity modulation indexes (or clipping ratios) are used. As expected, moderate levels of non-linear distortion are beneficial if properly selected according to the C-RAN configuration.
Grant numbers : TERESA - Hybrid TERrEstrial/Satellite Air Interface for 5G and Beyond (TEC2017-90093-C3-1-R).
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