A new three-dimensional code for OCDMA system

Many codes have been proposed for incoherent OCDMA based on one-dimensional (1-D), two-dimensional (2-D), and three-dimensional (3-D) by exploiting one or more resources simultaneously. The 3-D Perfect Difference (3-D PD) code has been proposed for spectral/time/spatial OCDMA system in order to incr...

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Format:	Thesis
Language:	English
Subjects:	Code division multiple access Telecommunication systems. Optical communication Computer network
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77182/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77182/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77182/4/Rasim%20Azeez.pdf
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spelling	my-unimap-771822022-11-24T08:21:04Z A new three-dimensional code for OCDMA system Hilal Adnan, Fadhil Many codes have been proposed for incoherent OCDMA based on one-dimensional (1-D), two-dimensional (2-D), and three-dimensional (3-D) by exploiting one or more resources simultaneously. The 3-D Perfect Difference (3-D PD) code has been proposed for spectral/time/spatial OCDMA system in order to increase the number of users by using shorter code lengths. But, the complexity of the system, especially the decoder, is increased. In this research, a new 3-D code namely, Three-Dimensional Diluted Perfect Difference/ Multi Diagonal (3-D DPD/MD) code is proposed for the incoherent OCDMA system, to completely cancel the Multi Access Interference (MAI), mitigate the Phase Induced Intensity Noise (PIIN), accommodate a large number of simultaneous users and reduce the complexity of the 3-D system decoder. The 3-D DPD/MD code has been developed based on the DPD and MD codes. The study of the proposed code, included the mathematical derivation of the performance equations in terms of Signal to Noise Ratio (SNR) and Bit Error Rate (BER) under the effect of receiver noises, and the validation by using optical simulation software. The system performance was investigated under the effect of data rate, distance, received power, and the photodetector type. Theoretical results showed that the 3-D DPD/MD code system achieved better performance than the 3-D PD, 2-D DPD, and 2-D PD codes of similar total users where a larger number of simultaneous users can be accommodated using the same data rate and received power. At BER of 10-9, it could support 1020 simultaneous users at 0.622 Gbps and -7 dBm compared with 660, 570 and 490 users of 3-D PD, 2-D DPD and 2-D PD codes, respectively, where the improvement factors were 54%, 78% and 108%. Also, the proposed code provided better performance than the others at 1.25 Gbps. Moreover, the 3-D DPD/MD code provided 600 active users at lower received power of -15 dBm with data rate of 0.622 Gbps. Consequently, the spectral efficiency based on the 3-D DPD/MD code was enhanced by more than 27%. In addition to that, the using of the 3-D DPD/MD code reduced the decoder complexity by more than 50% when compared with the 3-D PD code. On the other hand, the simulation results validated the proposed code to support the service differentiation in optical networks via simulation modeling. As a result, a high spectral efficiency, low system complexity, and a large number of simultaneous users can be accommodated by adopting the proposed code in the OCDMA networks. Universiti Malaysia Perlis (UniMAP) Thesis en http://dspace.unimap.edu.my:80/xmlui/handle/123456789/77182 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77182/3/license.txt 8a4605be74aa9ea9d79846c1fba20a33 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77182/1/Page%201-24.pdf 4dfd4bce980448cd9a18abb25ee8ee63 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77182/2/Full%20text.pdf 2d9ca09ef220817eeb3099165806e995 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77182/4/Rasim%20Azeez.pdf a7faf8f84f0959f2c24423c2c20a44e7 Universiti Malaysia Perlis (UniMAP) Code division multiple access Telecommunication systems. Optical communication Computer network School of Computer and Communication Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
advisor	Hilal Adnan, Fadhil
topic	Code division multiple access Telecommunication systems. Optical communication Computer network
spellingShingle	Code division multiple access Telecommunication systems. Optical communication Computer network A new three-dimensional code for OCDMA system
description	Many codes have been proposed for incoherent OCDMA based on one-dimensional (1-D), two-dimensional (2-D), and three-dimensional (3-D) by exploiting one or more resources simultaneously. The 3-D Perfect Difference (3-D PD) code has been proposed for spectral/time/spatial OCDMA system in order to increase the number of users by using shorter code lengths. But, the complexity of the system, especially the decoder, is increased. In this research, a new 3-D code namely, Three-Dimensional Diluted Perfect Difference/ Multi Diagonal (3-D DPD/MD) code is proposed for the incoherent OCDMA system, to completely cancel the Multi Access Interference (MAI), mitigate the Phase Induced Intensity Noise (PIIN), accommodate a large number of simultaneous users and reduce the complexity of the 3-D system decoder. The 3-D DPD/MD code has been developed based on the DPD and MD codes. The study of the proposed code, included the mathematical derivation of the performance equations in terms of Signal to Noise Ratio (SNR) and Bit Error Rate (BER) under the effect of receiver noises, and the validation by using optical simulation software. The system performance was investigated under the effect of data rate, distance, received power, and the photodetector type. Theoretical results showed that the 3-D DPD/MD code system achieved better performance than the 3-D PD, 2-D DPD, and 2-D PD codes of similar total users where a larger number of simultaneous users can be accommodated using the same data rate and received power. At BER of 10-9, it could support 1020 simultaneous users at 0.622 Gbps and -7 dBm compared with 660, 570 and 490 users of 3-D PD, 2-D DPD and 2-D PD codes, respectively, where the improvement factors were 54%, 78% and 108%. Also, the proposed code provided better performance than the others at 1.25 Gbps. Moreover, the 3-D DPD/MD code provided 600 active users at lower received power of -15 dBm with data rate of 0.622 Gbps. Consequently, the spectral efficiency based on the 3-D DPD/MD code was enhanced by more than 27%. In addition to that, the using of the 3-D DPD/MD code reduced the decoder complexity by more than 50% when compared with the 3-D PD code. On the other hand, the simulation results validated the proposed code to support the service differentiation in optical networks via simulation modeling. As a result, a high spectral efficiency, low system complexity, and a large number of simultaneous users can be accommodated by adopting the proposed code in the OCDMA networks.
format	Thesis
title	A new three-dimensional code for OCDMA system
title_short	A new three-dimensional code for OCDMA system
title_full	A new three-dimensional code for OCDMA system
title_fullStr	A new three-dimensional code for OCDMA system
title_full_unstemmed	A new three-dimensional code for OCDMA system
title_sort	new three-dimensional code for ocdma system
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	School of Computer and Communication Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77182/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77182/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77182/4/Rasim%20Azeez.pdf
_version_	1776104247119577088

A new three-dimensional code for OCDMA system

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