Development of a new class of zero cross correlation codes for optical CDMA systems

In this thesis, presented a method for development of a new class of optical code for Optical Code Division Multiple Access (OCDMA) system using Spectral Amplitude Coding. The proposed code is called Modified Zero Cross Correlation Code (MZCC) and Modified Non Zero Cross Correlation Code (MNZCC)....

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Main Author:	Mohd Rashidi, Che Beson
Format:	Thesis
Language:	English
Subjects:	Code length Optical Code Division Multiple Access (OCDMA) Modified Zero Cross Correlation Code (MZCC) Multi Access Interference Optical code
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31929/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31929/2/Full%20text.pdf
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spelling	my-unimap-319292014-02-14T03:34:00Z Development of a new class of zero cross correlation codes for optical CDMA systems Mohd Rashidi, Che Beson In this thesis, presented a method for development of a new class of optical code for Optical Code Division Multiple Access (OCDMA) system using Spectral Amplitude Coding. The proposed code is called Modified Zero Cross Correlation Code (MZCC) and Modified Non Zero Cross Correlation Code (MNZCC). From theory, the proposed method is to construct optical codes with simple code construction for any number of users, any cross correlation and for a given weights having minimum length. MZCC code has been designed with cross correlation is equal to zero due to eliminating the effects of Multi Access Interference (MAI) thus to prevent from overlapping of spectra from each users. These codes is easily to construct, simple and have better noise performance compared with existing optical codes such as ZCC code. While, MNZCC code presented in this thesis is to have unfixed cross correlation and it can be designed with any desired cross correlation. MNZCC have minimum code length, easier to constructed and the ability of this code is better than existing optical codes. The requirement in OCDMA systems to have minimum code length with any desired cross correlation is the reason of these codes has been designed. The performances of proposed codes were simulated using commercial simulation software, OptiSystem Version 6.0. The performance of the systems was characterized by referring to the Bit Error Rate (BER). From the simulation results, at distance 25km with bit rate 155Mbps, MZCC code have better BER 10-12 as opposed to BER for ZCC code is equal to 10-5 which is not error rate for standard optical communication systems threshold. Universiti Malaysia Perlis (UniMAP) 2011 Thesis en http://dspace.unimap.edu.my:80/dspace/handle/123456789/31929 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31929/1/Page%201-24.pdf 38babd91cab2af3e6093b6d3de8664bf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31929/2/Full%20text.pdf 8e4c601c159c54ab42781da81a78fe85 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31929/3/license.txt 8a4605be74aa9ea9d79846c1fba20a33 Code length Optical Code Division Multiple Access (OCDMA) Modified Zero Cross Correlation Code (MZCC) Multi Access Interference Optical code School of Computer and Communication Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
topic	Code length Optical Code Division Multiple Access (OCDMA) Modified Zero Cross Correlation Code (MZCC) Multi Access Interference Optical code
spellingShingle	Code length Optical Code Division Multiple Access (OCDMA) Modified Zero Cross Correlation Code (MZCC) Multi Access Interference Optical code Mohd Rashidi, Che Beson Development of a new class of zero cross correlation codes for optical CDMA systems
description	In this thesis, presented a method for development of a new class of optical code for Optical Code Division Multiple Access (OCDMA) system using Spectral Amplitude Coding. The proposed code is called Modified Zero Cross Correlation Code (MZCC) and Modified Non Zero Cross Correlation Code (MNZCC). From theory, the proposed method is to construct optical codes with simple code construction for any number of users, any cross correlation and for a given weights having minimum length. MZCC code has been designed with cross correlation is equal to zero due to eliminating the effects of Multi Access Interference (MAI) thus to prevent from overlapping of spectra from each users. These codes is easily to construct, simple and have better noise performance compared with existing optical codes such as ZCC code. While, MNZCC code presented in this thesis is to have unfixed cross correlation and it can be designed with any desired cross correlation. MNZCC have minimum code length, easier to constructed and the ability of this code is better than existing optical codes. The requirement in OCDMA systems to have minimum code length with any desired cross correlation is the reason of these codes has been designed. The performances of proposed codes were simulated using commercial simulation software, OptiSystem Version 6.0. The performance of the systems was characterized by referring to the Bit Error Rate (BER). From the simulation results, at distance 25km with bit rate 155Mbps, MZCC code have better BER 10-12 as opposed to BER for ZCC code is equal to 10-5 which is not error rate for standard optical communication systems threshold.
format	Thesis
author	Mohd Rashidi, Che Beson
author_facet	Mohd Rashidi, Che Beson
author_sort	Mohd Rashidi, Che Beson
title	Development of a new class of zero cross correlation codes for optical CDMA systems
title_short	Development of a new class of zero cross correlation codes for optical CDMA systems
title_full	Development of a new class of zero cross correlation codes for optical CDMA systems
title_fullStr	Development of a new class of zero cross correlation codes for optical CDMA systems
title_full_unstemmed	Development of a new class of zero cross correlation codes for optical CDMA systems
title_sort	development of a new class of zero cross correlation codes for optical cdma systems
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	School of Computer and Communication Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31929/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/31929/2/Full%20text.pdf
_version_	1747836797380984832

Development of a new class of zero cross correlation codes for optical CDMA systems

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