HF messaging system with automatic link establishment (ALE) capability

HF radio spectrum, ranging from 3 to 30 MHz can be utilized for voice and data communication. One of the benefit of using HF for communicating is that HF system is low-cost, requires minimum equipments and easy to set up. But due to the unpredictability and propagation problems such as multipath fad...

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Main Author:	Hasan, Nurulfadzilah
Format:	Thesis
Language:	English
Published:	2006
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/5338/1/NurulfadzilahHasanMFKE2006.pdf
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id	my-utm-ep.5338
record_format	uketd_dc
spelling	my-utm-ep.53382018-03-07T20:57:37Z HF messaging system with automatic link establishment (ALE) capability 2006-01 Hasan, Nurulfadzilah TK Electrical engineering. Electronics Nuclear engineering HF radio spectrum, ranging from 3 to 30 MHz can be utilized for voice and data communication. One of the benefit of using HF for communicating is that HF system is low-cost, requires minimum equipments and easy to set up. But due to the unpredictability and propagation problems such as multipath fading, interference and attenuation, communication using HF becomes very challenging. Besides, the availability of the channels varies depending on the time of day, seasons and the condition of the ionosphere. The purpose of this research is to design a HF messaging system equipped with Automatic Link Establishment (ALE) capability. ALE is an adaptive radio technology for automatically establishing communications over HF single sideband (SSB) links using the best frequency possible. The objective of the research is to design a messaging system that permits reliable data transmission over the HF radio with minimum cost and equipments. This research also looked at the feasibility of implementing ALE as software, designed using Visual C++ programming language. Equipments used in this research are commercial HF radio and modem, which are both controlled by the software. Field testing is conducted between UTM Skudai and several places in Malaysia to verify the performance of the system. From the results, it is proven that by applying adaptive radio technology, propagation problems can be overcome and reliability of data transmission can be improved. Moreover, amateur radio users can use the system, as it requires minimum equipment. 2006-01 Thesis http://eprints.utm.my/id/eprint/5338/ http://eprints.utm.my/id/eprint/5338/1/NurulfadzilahHasanMFKE2006.pdf application/pdf en public masters 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 Hasan, Nurulfadzilah HF messaging system with automatic link establishment (ALE) capability
description	HF radio spectrum, ranging from 3 to 30 MHz can be utilized for voice and data communication. One of the benefit of using HF for communicating is that HF system is low-cost, requires minimum equipments and easy to set up. But due to the unpredictability and propagation problems such as multipath fading, interference and attenuation, communication using HF becomes very challenging. Besides, the availability of the channels varies depending on the time of day, seasons and the condition of the ionosphere. The purpose of this research is to design a HF messaging system equipped with Automatic Link Establishment (ALE) capability. ALE is an adaptive radio technology for automatically establishing communications over HF single sideband (SSB) links using the best frequency possible. The objective of the research is to design a messaging system that permits reliable data transmission over the HF radio with minimum cost and equipments. This research also looked at the feasibility of implementing ALE as software, designed using Visual C++ programming language. Equipments used in this research are commercial HF radio and modem, which are both controlled by the software. Field testing is conducted between UTM Skudai and several places in Malaysia to verify the performance of the system. From the results, it is proven that by applying adaptive radio technology, propagation problems can be overcome and reliability of data transmission can be improved. Moreover, amateur radio users can use the system, as it requires minimum equipment.
format	Thesis
qualification_level	Master's degree
author	Hasan, Nurulfadzilah
author_facet	Hasan, Nurulfadzilah
author_sort	Hasan, Nurulfadzilah
title	HF messaging system with automatic link establishment (ALE) capability
title_short	HF messaging system with automatic link establishment (ALE) capability
title_full	HF messaging system with automatic link establishment (ALE) capability
title_fullStr	HF messaging system with automatic link establishment (ALE) capability
title_full_unstemmed	HF messaging system with automatic link establishment (ALE) capability
title_sort	hf messaging system with automatic link establishment (ale) capability
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2006
url	http://eprints.utm.my/id/eprint/5338/1/NurulfadzilahHasanMFKE2006.pdf
_version_	1747814583237607424

HF messaging system with automatic link establishment (ALE) capability

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