NDLI: Evaluation of Diversity and Power Control Techniques for Satellite Communication Systems in Tropical and Equatorial Rain Climates

Content Provider	IEEE Xplore Digital Library
Author	Qing Wei Pan Allnutt, J.E. Tsui, C.
Copyright Year	1963
Abstract	Satellite communication systems operating at frequencies above 10 GHz in tropical climates are subjected to many fade occurrences due to heavy rain. Service providers need to consider the use of appropriate forward error correction codes, the choice of modulations, diversity techniques, and the range of uplink/downlink power controls to use during severe rain fade periods in the overall design of their communications networks. The probable duration of a rain fade at a given level, what time of day it is likely to occur, how frequently it happens, and when it might next return are all important aspects that will contribute to customer perceptions. This paper presents the performances of annual and seasonal site-diversity and time-diversity measurements. Statistics of fade duration and fade slope variations are provided to give the detailed insight necessary for the design of very small aperture terminal (VSAT) systems, in particular, in choosing an economical link margin and a suitable adaptive power control subsystem. Furthermore, the variations in the received clear-sky level of the satellite beacon show evidence of a diurnal variation that has a period of a solar day due to the atmospheric thermal tide. There is also evidence for annual periodicity in absorption levels through the atmosphere on top of the diurnal tidal effect, again suspected to be due to a longer period atmospheric tide. In rain-fade countermeasure design (now more commonly referred to as fade mitigation techniques) for Ku/Ka-band systems in the tropics, the compensation for signal impairment due to tropospheric/atmospheric thermal tide should also be included in the fade countermeasure algorithm.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	3293
Ending Page	3301
Page Count	9
File Size	1165490
File Format	PDF
ISSN	0018926X
Volume Number	56
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power control Satellite communication Tides Rain fading Frequency Forward error correction Modulation coding Downlink Communication networks Performance evaluation very small aperture terminal (VSAT) Down-link power control fade mitigation techniques Ku/Ka band radiowave propagation rain fade satellite communications site diversity time diversity tropical climate tropospheric/atmospheric thermal tide up-link power control
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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