Experimental Analysis of 8-QAM Constellations for Adaptive Optical OFDM Systems

In this letter, we numerically and experimentally evaluate the influence of adopting different 8-QAM constellations. The performance of flexible/adaptive direct detection optical orthogonal frequency division multiplexing transmission systems has been evaluated in the back-to-back configuration. Met...

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Bibliographic Details
Authors: Nadal, L, Fabrega, JM, Vilchez, J, Moreolo, MS
Format: article
Status:Published version
Publication Date:2016
Country:España
Institution:Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
Repository:r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
OAI Identifier:oai:cttc.fundanetsuite.com:p1749
Online Access:https://cttc.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1749
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84962476302&doi=10.1109%2fLPT.2015.2499088&partnerID=40&md5=baf8f4b12f2d389c8e1a83df7b1af185
Access Level:Open access
Keyword:Adaptive optics
Chromatic dispersion
Frequency division multiplexing
Modulation
Optical fiber communication
Direct detection
Experimental analysis
Loading algorithms
Modulation formats
Network scenario
Optical orthogonal frequency division multiplexing
Single side bands
Transmission systems
Orthogonal frequency division multiplexing
Description
Summary:In this letter, we numerically and experimentally evaluate the influence of adopting different 8-QAM constellations. The performance of flexible/adaptive direct detection optical orthogonal frequency division multiplexing transmission systems has been evaluated in the back-to-back configuration. Metro/regional network scenario is also considered using the four-node photonic mesh network of the ADRENALINE testbed. In general, different optical paths of the network ranging from 50 to 185 km are analyzed to asses the optimal 8-QAM format, which maximizes the system performance. In addition, single side band modulation is implemented in order to enhance the robustness against the chromatic dispersion (CD). The effect of CD on the format selection is investigated targeting different data rates using the implemented loading algorithm. © 1989-2012 IEEE.

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