Simulation of Optical Spectrum Code Division Multiple Access in Fibre to the Home Access Network

Simulation of Optical Spectrum Code Division Multiple Access in Fibre to the Home Access Network

Nowadays, the increasing number of end users accessing the Internet and taking advantage of today’s data transport capabilities has ignited an explosive demand for bandwidth. One of the next generation access systems that helps to improve this situation by pushing optical fibre closer to the home is...

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Main Author: Othman, Maisara
Format: Thesis
Language:English
English
Published: 2005
Subjects:
Multiple access protocols (Computer network protocols) - Fiber optics - Case studies
Online Access:http://psasir.upm.edu.my/id/eprint/530/1/549634_FK_2005_62.pdf
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spelling my-upm-ir.5302013-05-27T06:49:02Z Simulation of Optical Spectrum Code Division Multiple Access in Fibre to the Home Access Network 2005-01 Othman, Maisara Nowadays, the increasing number of end users accessing the Internet and taking advantage of today’s data transport capabilities has ignited an explosive demand for bandwidth. One of the next generation access systems that helps to improve this situation by pushing optical fibre closer to the home is called fibre-to-the-home (FTTH). FTTH offers virtually unlimited bandwidth to the subscriber with high splitting ratio, longer fibre span and provide the residential customers with bundled of high speed voice, data and video services. Generally, the study of FTTH access network by implementing Optical Spectrum Code Division Multiple Access (OSCDMA) technique was presented. This technique is one of the multiplexing schemes that recently have become popular among researchers because of its flexibility in allocating channels, ability to operate asynchronously, enhanced privacy and increased capacity in bursty nature networks. One of the considerations in designing OSCDMA systems is coding. So in this study, we proposed a new code namely Double Weight Code (DWC) with basic fixed weight of 2 that exists for every natural number. The DW codes possess ideal cross correlation properties, that are important characteristics in spectral encoding OCDMA system since these can eliminate multiple user interference and reduce noise. The performance of DW code against Hadamard code is compared through simulation by using OptiSystem version 2.2. There are two types of FTTH networks; point-to-point (P2P) and point-to-multipoint (P2MP) that have been designed for downstream application and both codes are being implemented inside the networks and the performance are characterized through Bit Error Rate (BER), eye opening and Q factor. It is found that DW code is better than Hadamard code for all simulation results at bit rates of 622 Mbps, 1.25 Gbps and 2.5 Gbps. The optimization configuration for P2P network with 16 users, with BER as good as 10-9 value is achieved at 38 km distance for 2.5 Gbps with transmission power set at 0 dBm. While for P2MP network, the other configurations value is still the same like P2P network but the changes only happen at the transmission side. A single light emitting diode (LED) has been used with total transmission power set to 16.4 dBm. The bit rate can only reach up to 1.25 Gbps with distance up to 20 km to get the minimal value of BER. However the results on P2MP network shows enhancements offered by erbium doped fibre amplifier (EDFA) provides longer fibre span, larger distribution to the end user and it is suitable to support high speed gigabit network. Multiple access protocols (Computer network protocols) - Fiber optics - Case studies 2005-01 Thesis http://psasir.upm.edu.my/id/eprint/530/ http://psasir.upm.edu.my/id/eprint/530/1/549634_FK_2005_62.pdf application/pdf en public masters Universiti Putra Malaysia Multiple access protocols (Computer network protocols) - Fiber optics - Case studies Faculty of Engineering English
institution Universiti Putra Malaysia
collection PSAS Institutional Repository
language English
English
topic Multiple access protocols (Computer network protocols) - Fiber optics - Case studies
spellingShingle Multiple access protocols (Computer network protocols) - Fiber optics - Case studies


Othman, Maisara
Simulation of Optical Spectrum Code Division Multiple Access in Fibre to the Home Access Network
description Nowadays, the increasing number of end users accessing the Internet and taking advantage of today’s data transport capabilities has ignited an explosive demand for bandwidth. One of the next generation access systems that helps to improve this situation by pushing optical fibre closer to the home is called fibre-to-the-home (FTTH). FTTH offers virtually unlimited bandwidth to the subscriber with high splitting ratio, longer fibre span and provide the residential customers with bundled of high speed voice, data and video services. Generally, the study of FTTH access network by implementing Optical Spectrum Code Division Multiple Access (OSCDMA) technique was presented. This technique is one of the multiplexing schemes that recently have become popular among researchers because of its flexibility in allocating channels, ability to operate asynchronously, enhanced privacy and increased capacity in bursty nature networks. One of the considerations in designing OSCDMA systems is coding. So in this study, we proposed a new code namely Double Weight Code (DWC) with basic fixed weight of 2 that exists for every natural number. The DW codes possess ideal cross correlation properties, that are important characteristics in spectral encoding OCDMA system since these can eliminate multiple user interference and reduce noise. The performance of DW code against Hadamard code is compared through simulation by using OptiSystem version 2.2. There are two types of FTTH networks; point-to-point (P2P) and point-to-multipoint (P2MP) that have been designed for downstream application and both codes are being implemented inside the networks and the performance are characterized through Bit Error Rate (BER), eye opening and Q factor. It is found that DW code is better than Hadamard code for all simulation results at bit rates of 622 Mbps, 1.25 Gbps and 2.5 Gbps. The optimization configuration for P2P network with 16 users, with BER as good as 10-9 value is achieved at 38 km distance for 2.5 Gbps with transmission power set at 0 dBm. While for P2MP network, the other configurations value is still the same like P2P network but the changes only happen at the transmission side. A single light emitting diode (LED) has been used with total transmission power set to 16.4 dBm. The bit rate can only reach up to 1.25 Gbps with distance up to 20 km to get the minimal value of BER. However the results on P2MP network shows enhancements offered by erbium doped fibre amplifier (EDFA) provides longer fibre span, larger distribution to the end user and it is suitable to support high speed gigabit network.
format Thesis
qualification_level Master's degree
author Othman, Maisara
author_facet Othman, Maisara
author_sort Othman, Maisara
title Simulation of Optical Spectrum Code Division Multiple Access in Fibre to the Home Access Network
title_short Simulation of Optical Spectrum Code Division Multiple Access in Fibre to the Home Access Network
title_full Simulation of Optical Spectrum Code Division Multiple Access in Fibre to the Home Access Network
title_fullStr Simulation of Optical Spectrum Code Division Multiple Access in Fibre to the Home Access Network
title_full_unstemmed Simulation of Optical Spectrum Code Division Multiple Access in Fibre to the Home Access Network
title_sort simulation of optical spectrum code division multiple access in fibre to the home access network
granting_institution Universiti Putra Malaysia
granting_department Faculty of Engineering
publishDate 2005
url http://psasir.upm.edu.my/id/eprint/530/1/549634_FK_2005_62.pdf
_version_ 1747810242583855104

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