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Performance analysis of DCO OFDM and DCO WOFDM systems in MMF optical links

Orthogonal Frequency Division Multiplexing (OFDM) is a Multi Carrier Modulation (MCM) technique which has been known as a powerful tool to overcome Inter Symbol Interference (ISI) caused by a dispersive channel. Since optical communication channels are dispersive environments, during last decades op...

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Main Author: Mirbadin, Anoush
Format: Thesis
Language:English
Published: 2011
Subjects:
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://eprints.utm.my/id/eprint/28732/1/AnoushMirbadinMFKE2011.pdf
http://eprints.utm.my/id/eprint/28732/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:67987?queryType=vitalDismax&query=Performance+analysis+of+DCO+OFDM+and+DCO+WOFDM+systems+in+MMF+optical+links&public=true
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spelling my.utm.287322018-05-27T06:39:07Z http://eprints.utm.my/id/eprint/28732/ Performance analysis of DCO OFDM and DCO WOFDM systems in MMF optical links Mirbadin, Anoush TK Electrical engineering. Electronics Nuclear engineering Orthogonal Frequency Division Multiplexing (OFDM) is a Multi Carrier Modulation (MCM) technique which has been known as a powerful tool to overcome Inter Symbol Interference (ISI) caused by a dispersive channel. Since optical communication channels are dispersive environments, during last decades optical OFDM has been proposed for compensating modal and chromatic dispersion in the optical communication systems. The purpose of this study is to analyze and compare the performances of DC biased Optical Orthogonal Frequency Division Multiplexing (DCO OFDM) and DC biased Optical Wavelet based Orthogonal Frequency Division Multiplexing (DCO WOFDM) systems in Multi Mode Fiber (MMF) optical links. Mach Zehnder Modulator (MZM) was utilized as the optical modulator. The simulations were carried out using Optisystem software. Bit Error Rate (BER) versus transmission distance curves as well as Optical Signal to Noise Ratio (OSNR) versus transmission distance curves were used as criterions for evaluating the performances of the simulated systems. Simulation results show that DCO WOFDM system offers considerable improvement in BER performance compared to DCO OFDM system. It was found that error free transmission distance for DCO OFDM and DCO WOFDM occurred at 330 m and 360 m, respectively. The achieved BER by DCO WOFDM at a 375 m link distance is 23 times smaller than the achieved BER by DCO OFDM at the same link distance. Even though, the bandwidth of DCO WOFDM signal is twice the bandwidth of DCO OFDM signal. Sensitivity of DCO WOFDM signal to noise is slightly better than the sensitivity of DCO OFDM signal to noise. These benefits are due to the fact that the Power Spectral Density (PSD) of DCO WOFDM signal is more compatible with the channel frequency response in contrast to the PSD of DCO OFDM signal. 2011 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/28732/1/AnoushMirbadinMFKE2011.pdf Mirbadin, Anoush (2011) Performance analysis of DCO OFDM and DCO WOFDM systems in MMF optical links. Masters thesis, Universiti Teknologi Malaysia, Faculty of Electrical Engineering. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:67987?queryType=vitalDismax&query=Performance+analysis+of+DCO+OFDM+and+DCO+WOFDM+systems+in+MMF+optical+links&public=true
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TK Electrical engineering. Electronics Nuclear engineering
spellingShingle TK Electrical engineering. Electronics Nuclear engineering
Mirbadin, Anoush
Performance analysis of DCO OFDM and DCO WOFDM systems in MMF optical links
description Orthogonal Frequency Division Multiplexing (OFDM) is a Multi Carrier Modulation (MCM) technique which has been known as a powerful tool to overcome Inter Symbol Interference (ISI) caused by a dispersive channel. Since optical communication channels are dispersive environments, during last decades optical OFDM has been proposed for compensating modal and chromatic dispersion in the optical communication systems. The purpose of this study is to analyze and compare the performances of DC biased Optical Orthogonal Frequency Division Multiplexing (DCO OFDM) and DC biased Optical Wavelet based Orthogonal Frequency Division Multiplexing (DCO WOFDM) systems in Multi Mode Fiber (MMF) optical links. Mach Zehnder Modulator (MZM) was utilized as the optical modulator. The simulations were carried out using Optisystem software. Bit Error Rate (BER) versus transmission distance curves as well as Optical Signal to Noise Ratio (OSNR) versus transmission distance curves were used as criterions for evaluating the performances of the simulated systems. Simulation results show that DCO WOFDM system offers considerable improvement in BER performance compared to DCO OFDM system. It was found that error free transmission distance for DCO OFDM and DCO WOFDM occurred at 330 m and 360 m, respectively. The achieved BER by DCO WOFDM at a 375 m link distance is 23 times smaller than the achieved BER by DCO OFDM at the same link distance. Even though, the bandwidth of DCO WOFDM signal is twice the bandwidth of DCO OFDM signal. Sensitivity of DCO WOFDM signal to noise is slightly better than the sensitivity of DCO OFDM signal to noise. These benefits are due to the fact that the Power Spectral Density (PSD) of DCO WOFDM signal is more compatible with the channel frequency response in contrast to the PSD of DCO OFDM signal.
format Thesis
author Mirbadin, Anoush
author_facet Mirbadin, Anoush
author_sort Mirbadin, Anoush
title Performance analysis of DCO OFDM and DCO WOFDM systems in MMF optical links
title_short Performance analysis of DCO OFDM and DCO WOFDM systems in MMF optical links
title_full Performance analysis of DCO OFDM and DCO WOFDM systems in MMF optical links
title_fullStr Performance analysis of DCO OFDM and DCO WOFDM systems in MMF optical links
title_full_unstemmed Performance analysis of DCO OFDM and DCO WOFDM systems in MMF optical links
title_sort performance analysis of dco ofdm and dco wofdm systems in mmf optical links
publishDate 2011
url http://eprints.utm.my/id/eprint/28732/1/AnoushMirbadinMFKE2011.pdf
http://eprints.utm.my/id/eprint/28732/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:67987?queryType=vitalDismax&query=Performance+analysis+of+DCO+OFDM+and+DCO+WOFDM+systems+in+MMF+optical+links&public=true
_version_ 1643648146531680256
score 13.211869

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