A new flexible cross correlation (FCC) code for optical CDMA systems

There are tremendous interest in applying code division multiple access (CDMA) techniques to fiber optic communication systems. This technique is one of the multiple access schemes that is becoming popular due to its channel allocation flexibility, asynchronously operation, enhanced privacy, and inc...

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Main Author:	Mohd Rashidi, Che Beson
Format:	Thesis
Language:	English
Subjects:	Code division multiple access (CDMA) Fiber optic communication systems Flexible Cross Correlation (FCC) Optical CDMA (OCDMA) Multiple access interference
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44194/1/p.1-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44194/2/full%20text.pdf
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id	my-unimap-44194
record_format	uketd_dc
spelling	my-unimap-441942016-11-29T07:31:01Z A new flexible cross correlation (FCC) code for optical CDMA systems Mohd Rashidi, Che Beson Prof. Dr. Syed Alwee Aljunid Syed Junid There are tremendous interest in applying code division multiple access (CDMA) techniques to fiber optic communication systems. This technique is one of the multiple access schemes that is becoming popular due to its channel allocation flexibility, asynchronously operation, enhanced privacy, and increased capacity in bursty networks. The performance of optical CDMA (OCDMA) systems are highly dependable on code designed properties. In this thesis, a new Flexible Cross Correlation (FCC) code for OCDMA system is designed, simulated and validated. The FCC code has numerous features such as unfixed cross correlation function with shortest code length, easy to build, and adaptability to accommodate variance number of users and weights. The FCC code is designed based on matrix combinatorial where the tridiagonal code matrix was adopted in developing the algorithm of this FCC code. This research examines the theoretical and simulation aspects in the case of incoherent signal from the broadband light source utilizing AND subtraction detection technique at the receiver side. The results revealed that the FCC code can accommodate 150 users, where FCC code offers 66%, 172%, 650% and 900% improvement as a contrast to 90, 55, 20 and 15 numbers of users for Dynamic Cyclic Shift (DCS), Modified Double Weight (MDW), Modified Frequency Hoping (MFH)and Hadamard codes, respectively, for a permissible bit error rate (BER) of 10−9. The FCC code indicates optical received power Psr of −25 dBm, thus, the detection system is more sensitive via utilizing FCC code. The performance of OCDMA codes were simulated using OptiSystem software from Optiwave TM. The performance of the systems were characterized by referring to the BER, bit rate, optical received power Psr and fiber length. The results shown that the FCC code performs adequately for 45 km as opposed to 21 km for MDW code within bit rate of 155 Mbps and BER of 10−9. In this work, AND subtraction detection technique is employed at the receiver end in order to reduce the receiver complexity, and improve the system performance in terms of distance and number of active users. It has been shown through theoretical and simulation results, the performance of the system with AND subtraction detection technique improved significantly. Based on the validation of theoretical and imulation results employing back-to-back (B2B) transmission, a receiver's power marginal of −36 dB is obtained at a bi rate of 155 Mbps and BER of 10−9 over 10 km fiber length. Universiti Malaysia Perlis (UniMAP) 2014 Thesis en http://dspace.unimap.edu.my:80/xmlui/handle/123456789/44194 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44194/1/p.1-24.pdf 973ece46dc44e50f030d8ccb4ff66caa http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44194/2/full%20text.pdf 5ec4cfc6c85d0a32d0522af70c27e769 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44194/3/license.txt 8a4605be74aa9ea9d79846c1fba20a33 Code division multiple access (CDMA) Fiber optic communication systems Flexible Cross Correlation (FCC) Optical CDMA (OCDMA) Multiple access interference School of Computer and Communication Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
advisor	Prof. Dr. Syed Alwee Aljunid Syed Junid
topic	Code division multiple access (CDMA) Fiber optic communication systems Flexible Cross Correlation (FCC) Optical CDMA (OCDMA) Multiple access interference
spellingShingle	Code division multiple access (CDMA) Fiber optic communication systems Flexible Cross Correlation (FCC) Optical CDMA (OCDMA) Multiple access interference Mohd Rashidi, Che Beson A new flexible cross correlation (FCC) code for optical CDMA systems
description	There are tremendous interest in applying code division multiple access (CDMA) techniques to fiber optic communication systems. This technique is one of the multiple access schemes that is becoming popular due to its channel allocation flexibility, asynchronously operation, enhanced privacy, and increased capacity in bursty networks. The performance of optical CDMA (OCDMA) systems are highly dependable on code designed properties. In this thesis, a new Flexible Cross Correlation (FCC) code for OCDMA system is designed, simulated and validated. The FCC code has numerous features such as unfixed cross correlation function with shortest code length, easy to build, and adaptability to accommodate variance number of users and weights. The FCC code is designed based on matrix combinatorial where the tridiagonal code matrix was adopted in developing the algorithm of this FCC code. This research examines the theoretical and simulation aspects in the case of incoherent signal from the broadband light source utilizing AND subtraction detection technique at the receiver side. The results revealed that the FCC code can accommodate 150 users, where FCC code offers 66%, 172%, 650% and 900% improvement as a contrast to 90, 55, 20 and 15 numbers of users for Dynamic Cyclic Shift (DCS), Modified Double Weight (MDW), Modified Frequency Hoping (MFH)and Hadamard codes, respectively, for a permissible bit error rate (BER) of 10−9. The FCC code indicates optical received power Psr of −25 dBm, thus, the detection system is more sensitive via utilizing FCC code. The performance of OCDMA codes were simulated using OptiSystem software from Optiwave TM. The performance of the systems were characterized by referring to the BER, bit rate, optical received power Psr and fiber length. The results shown that the FCC code performs adequately for 45 km as opposed to 21 km for MDW code within bit rate of 155 Mbps and BER of 10−9. In this work, AND subtraction detection technique is employed at the receiver end in order to reduce the receiver complexity, and improve the system performance in terms of distance and number of active users. It has been shown through theoretical and simulation results, the performance of the system with AND subtraction detection technique improved significantly. Based on the validation of theoretical and imulation results employing back-to-back (B2B) transmission, a receiver's power marginal of −36 dB is obtained at a bi rate of 155 Mbps and BER of 10−9 over 10 km fiber length.
format	Thesis
author	Mohd Rashidi, Che Beson
author_facet	Mohd Rashidi, Che Beson
author_sort	Mohd Rashidi, Che Beson
title	A new flexible cross correlation (FCC) code for optical CDMA systems
title_short	A new flexible cross correlation (FCC) code for optical CDMA systems
title_full	A new flexible cross correlation (FCC) code for optical CDMA systems
title_fullStr	A new flexible cross correlation (FCC) code for optical CDMA systems
title_full_unstemmed	A new flexible cross correlation (FCC) code for optical CDMA systems
title_sort	new flexible cross correlation (fcc) code 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/123456789/44194/1/p.1-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/44194/2/full%20text.pdf
_version_	1747836827946975232

A new flexible cross correlation (FCC) code for optical CDMA systems

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