The performance of dual diffuser modulation using wavelength filtrate detection for free space optics in the presence of rain consequence

Free space optics (FSO) is one of the effective solutions to the ever growing needs of high speed data transfer. It offers unlicensed, higher speed with unlimited bandwidth as well as provides an excellent security. However, it is sensitive to local weather conditions which results to the inconsider...

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Format:	Thesis
Language:	English
Subjects:	Free space optical interconnects Optical wave guides Free space optics (FSO) Data transfer
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78735/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78735/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78735/3/Moh%20Fauzan.pdf
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spelling	my-unimap-787352023-05-12T12:35:23Z The performance of dual diffuser modulation using wavelength filtrate detection for free space optics in the presence of rain consequence Anuar, Mat Safar, Assoc. Prof. Ir. Dr. Free space optics (FSO) is one of the effective solutions to the ever growing needs of high speed data transfer. It offers unlicensed, higher speed with unlimited bandwidth as well as provides an excellent security. However, it is sensitive to local weather conditions which results to the inconsiderable loss of signal power over the communication path. To the fact, the quality of the FSO links are mainly affected by rain attenuation especially in a tropical environment. The conventional modulation of FSO system increases the error rate and produces low power received in situation of bad weather. Besides that, the existing detection degrades the received signal and not properly operated. Hence, in order to cater this problem, the proposed detection namely Wavelength Filtrate Detection has been developed to enhance the performance of FSO system. The proposed detection is based on the function of Fibre Bragg Grating which is capable to optimise the filter wavelength. In this research, the collection of rainfall data in year 2015 is provided by Malaysia Meteorological Department which covers region in Chuping, Perlis. From this data, a depth analysis of rain attenuation by using mathematical equation of power law has been carried out which results to the maximum rain attenuation of 13dB/km. This value is categorized under heavy rain condition. Then, the analysis is continued with the comparison between conventional modulation technique On Off Keying (OOK) and Dual Diffuser Modulation (DDM). Two types of analysis are done which are theoretical and simulation to prove that DDM technique enhances the performance of FSO system due to the adverse weather condition. The analysis continues with comparison between existing detection and Wavelength Filtrate Detection. The DDM technique is selected as the main modulation in this research because it supports 0.12km range of transceiver and improves signal received approximately 4dBm from the mathematical analysis. Also, the eye pattern in 0.5km range shows DDM technique is widely open with better BER 8.10×10-7 compares to OOK technique which is 6.51×10-4 and results to the higher loss of signal. Furthermore, this technique also supports high data rate up to 10Gbps. The problem occur in DDM technique is on the detection stage. The detection needs to be improved to avoid high signal losses when adverse weather condition occurs. To overcome this issue, Wavelength Filtrate Detection has been developed and it shows the improvement of 21% magnitude of BER as well as increase the power received up to 6dBm. As conclusion, the combination of DDM technique and Wavelength Filtrate Detection (WFD) have increase the performance of FSO system and capable to transmit high capacity of data in a situation of adverse weather condition. Universiti Malaysia Perlis (UniMAP) Thesis en http://dspace.unimap.edu.my:80/xmlui/handle/123456789/78735 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78735/4/license.txt 8a4605be74aa9ea9d79846c1fba20a33 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78735/1/Page%201-24.pdf abeb34671f8c516f35effc985d48a274 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78735/2/Full%20text.pdf 071b3bc6294dec81d0fbed7ee291c540 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78735/3/Moh%20Fauzan.pdf bee94ed90ac9b19bce3b86509362c5b5 Universiti Malaysia Perlis (UniMAP) Free space optical interconnects Optical wave guides Free space optics (FSO) Data transfer School of Computer and Communication Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
advisor	Anuar, Mat Safar, Assoc. Prof. Ir. Dr.
topic	Free space optical interconnects Optical wave guides Free space optics (FSO) Data transfer
spellingShingle	Free space optical interconnects Optical wave guides Free space optics (FSO) Data transfer The performance of dual diffuser modulation using wavelength filtrate detection for free space optics in the presence of rain consequence
description	Free space optics (FSO) is one of the effective solutions to the ever growing needs of high speed data transfer. It offers unlicensed, higher speed with unlimited bandwidth as well as provides an excellent security. However, it is sensitive to local weather conditions which results to the inconsiderable loss of signal power over the communication path. To the fact, the quality of the FSO links are mainly affected by rain attenuation especially in a tropical environment. The conventional modulation of FSO system increases the error rate and produces low power received in situation of bad weather. Besides that, the existing detection degrades the received signal and not properly operated. Hence, in order to cater this problem, the proposed detection namely Wavelength Filtrate Detection has been developed to enhance the performance of FSO system. The proposed detection is based on the function of Fibre Bragg Grating which is capable to optimise the filter wavelength. In this research, the collection of rainfall data in year 2015 is provided by Malaysia Meteorological Department which covers region in Chuping, Perlis. From this data, a depth analysis of rain attenuation by using mathematical equation of power law has been carried out which results to the maximum rain attenuation of 13dB/km. This value is categorized under heavy rain condition. Then, the analysis is continued with the comparison between conventional modulation technique On Off Keying (OOK) and Dual Diffuser Modulation (DDM). Two types of analysis are done which are theoretical and simulation to prove that DDM technique enhances the performance of FSO system due to the adverse weather condition. The analysis continues with comparison between existing detection and Wavelength Filtrate Detection. The DDM technique is selected as the main modulation in this research because it supports 0.12km range of transceiver and improves signal received approximately 4dBm from the mathematical analysis. Also, the eye pattern in 0.5km range shows DDM technique is widely open with better BER 8.10×10-7 compares to OOK technique which is 6.51×10-4 and results to the higher loss of signal. Furthermore, this technique also supports high data rate up to 10Gbps. The problem occur in DDM technique is on the detection stage. The detection needs to be improved to avoid high signal losses when adverse weather condition occurs. To overcome this issue, Wavelength Filtrate Detection has been developed and it shows the improvement of 21% magnitude of BER as well as increase the power received up to 6dBm. As conclusion, the combination of DDM technique and Wavelength Filtrate Detection (WFD) have increase the performance of FSO system and capable to transmit high capacity of data in a situation of adverse weather condition.
format	Thesis
title	The performance of dual diffuser modulation using wavelength filtrate detection for free space optics in the presence of rain consequence
title_short	The performance of dual diffuser modulation using wavelength filtrate detection for free space optics in the presence of rain consequence
title_full	The performance of dual diffuser modulation using wavelength filtrate detection for free space optics in the presence of rain consequence
title_fullStr	The performance of dual diffuser modulation using wavelength filtrate detection for free space optics in the presence of rain consequence
title_full_unstemmed	The performance of dual diffuser modulation using wavelength filtrate detection for free space optics in the presence of rain consequence
title_sort	performance of dual diffuser modulation using wavelength filtrate detection for free space optics in the presence of rain consequence
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	School of Computer and Communication Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78735/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78735/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78735/3/Moh%20Fauzan.pdf
_version_	1776104286371971072

The performance of dual diffuser modulation using wavelength filtrate detection for free space optics in the presence of rain consequence

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