Rain fade dynamics for Ka-band satellite communication mitigation technique in equatorial Malaysia

Modern satellite communication system in higher frequency (Ka-band and above) is very much impaired by rain attenuation particularly in tropical and equatorial region. The desired Quality of Service (QoS) and system availability can be guaranteed only by resorting to smart strategies, named Propagat...

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Main Author:	Mohamed Yunus, Mawarni
Format:	Thesis
Language:	English
Published:	2018
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/84174/1/MawarniMohamedYunusPSKE2018.pdf
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spelling	my-utm-ep.841742019-12-16T01:56:41Z Rain fade dynamics for Ka-band satellite communication mitigation technique in equatorial Malaysia 2018 Mohamed Yunus, Mawarni TK Electrical engineering. Electronics Nuclear engineering Modern satellite communication system in higher frequency (Ka-band and above) is very much impaired by rain attenuation particularly in tropical and equatorial region. The desired Quality of Service (QoS) and system availability can be guaranteed only by resorting to smart strategies, named Propagation Impairment Mitigation Techniques (PIMTs) such as power control, adaptive modulation schemes and link diversity. These requires knowledge of the first- and second-order statistics of rain attenuation. Hence, this work concentrates on those aspects in equatorial Johor Bahru, Malaysia, based on one year Ka-band propagation measurement campaign, utilizing the equipment of Beacon Receiver and 2D-Video-Disdrometer (2DVD). Study begins by investigation the rain fade behaviour such as rain attenuation, fade duration, inter-fade duration and fade slope as well as their seasonal and diurnal variations. It is observed that rain attenuation experienced by the Ka-band link requires fade margin of 26.8 dB for 99.9% link availability with the convective events mostly like to occur during the afternoon hour (12:00 pm to 6:00 pm) at high intensity, shorter duration and relatively high rate of change of attenuation particularly during Northeast Moonsoon. Then, the Stratiform Convective-Synthetic Storm Technique (SC-SST) is proposed to estimate the dynamic characteristics of rain attenuation in equatorial region. The SC-SST is found 11% better than SST and 51% better than ITU-R P.1623-1 model in average value of fade dynamics prediction. Finally, a time diversity technique is recommended to mitigate strong signal fades in equatorial region. The results depicted that 10-minute outage tolerance will significantly lower the fade margin requirement to 15 dB for 99.9% of link availability. Afterwards, the generation of time diversity statistics is modelled which can be best represents by gamma-law in this area. The results can provide system engineers with critical information in the design and implementation of PIMTs, and it is expected that the probability of system outages will be greatly reduced. 2018 Thesis http://eprints.utm.my/id/eprint/84174/ http://eprints.utm.my/id/eprint/84174/1/MawarniMohamedYunusPSKE2018.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:126553 phd doctoral Universiti Teknologi Malaysia, Faculty of Electrical Engineering Faculty of Electrical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TK Electrical engineering Electronics Nuclear engineering
spellingShingle	TK Electrical engineering Electronics Nuclear engineering Mohamed Yunus, Mawarni Rain fade dynamics for Ka-band satellite communication mitigation technique in equatorial Malaysia
description	Modern satellite communication system in higher frequency (Ka-band and above) is very much impaired by rain attenuation particularly in tropical and equatorial region. The desired Quality of Service (QoS) and system availability can be guaranteed only by resorting to smart strategies, named Propagation Impairment Mitigation Techniques (PIMTs) such as power control, adaptive modulation schemes and link diversity. These requires knowledge of the first- and second-order statistics of rain attenuation. Hence, this work concentrates on those aspects in equatorial Johor Bahru, Malaysia, based on one year Ka-band propagation measurement campaign, utilizing the equipment of Beacon Receiver and 2D-Video-Disdrometer (2DVD). Study begins by investigation the rain fade behaviour such as rain attenuation, fade duration, inter-fade duration and fade slope as well as their seasonal and diurnal variations. It is observed that rain attenuation experienced by the Ka-band link requires fade margin of 26.8 dB for 99.9% link availability with the convective events mostly like to occur during the afternoon hour (12:00 pm to 6:00 pm) at high intensity, shorter duration and relatively high rate of change of attenuation particularly during Northeast Moonsoon. Then, the Stratiform Convective-Synthetic Storm Technique (SC-SST) is proposed to estimate the dynamic characteristics of rain attenuation in equatorial region. The SC-SST is found 11% better than SST and 51% better than ITU-R P.1623-1 model in average value of fade dynamics prediction. Finally, a time diversity technique is recommended to mitigate strong signal fades in equatorial region. The results depicted that 10-minute outage tolerance will significantly lower the fade margin requirement to 15 dB for 99.9% of link availability. Afterwards, the generation of time diversity statistics is modelled which can be best represents by gamma-law in this area. The results can provide system engineers with critical information in the design and implementation of PIMTs, and it is expected that the probability of system outages will be greatly reduced.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Mohamed Yunus, Mawarni
author_facet	Mohamed Yunus, Mawarni
author_sort	Mohamed Yunus, Mawarni
title	Rain fade dynamics for Ka-band satellite communication mitigation technique in equatorial Malaysia
title_short	Rain fade dynamics for Ka-band satellite communication mitigation technique in equatorial Malaysia
title_full	Rain fade dynamics for Ka-band satellite communication mitigation technique in equatorial Malaysia
title_fullStr	Rain fade dynamics for Ka-band satellite communication mitigation technique in equatorial Malaysia
title_full_unstemmed	Rain fade dynamics for Ka-band satellite communication mitigation technique in equatorial Malaysia
title_sort	rain fade dynamics for ka-band satellite communication mitigation technique in equatorial malaysia
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2018
url	http://eprints.utm.my/id/eprint/84174/1/MawarniMohamedYunusPSKE2018.pdf
_version_	1747818441774989312

Rain fade dynamics for Ka-band satellite communication mitigation technique in equatorial Malaysia

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