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

Master of Science in Communication Engineering

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Bibliographic Details
Main Author: Mohammad Fauzan, Talib
Other Authors: Anuar, Mat Safar, Assoc. Prof. Ir. Dr.
Format: Thesis
Language:English
Published: Universiti Malaysia Perlis (UniMAP) 2018
Subjects:
Free space optical interconnects
Optical wave guides
Free space optics (FSO)
Data transfer
Online Access:http://dspace.unimap.edu.my:80/xmlui/handle/123456789/78735
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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 Mohammad Fauzan, Talib Anuar, Mat Safar, Assoc. Prof. Ir. Dr. Free space optical interconnects Optical wave guides Free space optics (FSO) Data transfer Master of Science in Communication Engineering 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. 2018 2023-05-12T12:35:23Z 2023-05-12T12:35:23Z Thesis http://dspace.unimap.edu.my:80/xmlui/handle/123456789/78735 en Universiti Malaysia Perlis (UniMAP) Universiti Malaysia Perlis (UniMAP) School of Computer and Communication Engineering
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
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
Mohammad Fauzan, Talib
The performance of dual diffuser modulation using wavelength filtrate detection for free space optics in the presence of rain consequence
description Master of Science in Communication Engineering
author2 Anuar, Mat Safar, Assoc. Prof. Ir. Dr.
author_facet Anuar, Mat Safar, Assoc. Prof. Ir. Dr.
Mohammad Fauzan, Talib
format Thesis
author Mohammad Fauzan, Talib
author_sort Mohammad Fauzan, Talib
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
publisher Universiti Malaysia Perlis (UniMAP)
publishDate 2018
url http://dspace.unimap.edu.my:80/xmlui/handle/123456789/78735
_version_ 1772813205502951424
score 13.222552

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