Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 83 for “"Radio spectrum"”.
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Exploring the interaction between the international radio spectrum management regime and national radio spectrum management policies
National spectrum management policy is once more a key issue facing the global telecommunications industry in order to meet the rapid growth in wireless services and the increasing demand for mobile broadband. Three approaches are usually suggested to overcome the deficiencies of the command and …
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Efficient Sharing of Radio Spectrum for Wireless Networks
The radio spectrum that can be used for wireless communications is a finite but extremely valuable resource. During the past two decades, with the proliferation of new wireless applications, the use of the radio spectrum has intensified to the point that improved spectrum sharing policies and new …
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Assuring robustness of radio spectrum telemetry against vandalism and exploitation
The emerging paradigm for using the wireless spectrum more efficiently is based on enabling secondary users to exploit white-space frequencies that are not occupied by primary users. An enabling technology for forming networks over white spaces is distributed spectrum measurement to identify and …
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Creating order in the ceaseless flow: The discursive constitution of the radio spectrum
The concept of 'radio spectrum' was created to organise the electromagnetic waves used by communicative technologies. It signifies an ordered sequence of radio frequencies and the delineation of blocks of those frequencies for allocation to uses and users. This thesis examines the development of …
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Performance Evaluation of Cognitive Radio Spectrum Sensing Techniques through a Rayleigh Fading Channel
… accommodate the associated demand for wireless spectrum as we step into this new era of wireless connectivity, traditional methods of spectrum utilization based on fixed and static allocation are no longer adequate. New innovative forms that support dynamic assignment of spectrum space on …
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Improving the capacity of radio spectrum: exploration of the acyclic orientations of a graph
The efficient use of radio spectrum depends upon frequency assignment within a telecommunications network. The solution space of the frequency assignment problem is best described by the acyclic orientations of the network. An acyclic orientation Ɵ of a graph (network) G is an orientation of the …
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Radio spectrum utilization in Zambia: establishing availability of white space, as enablers for ICT services network rollouts
… interest world over. TVWS refers to regions of radio spectrum in the Ultra High Frequency(UHF)bandthatarenotusedallthetimeinaspecificgeographicallocation.TVWS spectrum brings with advantageous propagation properties inherent to UHF spectrum and has been identified as an alternative for providing …
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Radio spectrum utilization in Zambia: establishing availability of white space, as enablers for ICT services network rollouts
… interest world over. TVWS refers to regions of radio spectrum in the Ultra High Frequency(UHF)bandthatarenotusedallthetimeinaspecificgeographicallocation.TVWS spectrum brings with advantageous propagation properties inherent to UHF spectrum and has been identified as an alternative for providing …
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Maximizing the Utility of Radio Spectrum: Broadband Spectrum Measurements and Occupancy Model for Use by Cognitive Radio
Radio spectrum is a vital national asset; proper management of this finite resource is essential to the operation and development of telecommunications, radio-navigation, radio astronomy, and passive remote sensing services. To maximize the utility of the radio spectrum, knowledge of its current …
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The importance of non-functional factors in explaining delegation to non-governmental agencies: the case study of radio spectrum
… but specifically examines the delegation of radio spectrum management. Radio spectrum is a key operational responsibility of Telecommunications regulatory agencies however it has been delegated through different institutional solutions. An examination of radio spectrum delegation will help to …
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An analysis of spectrum allocation for the mobile phone services
… paper investigates the relationship between the spectrum allocation policy and the mobile broadband cost in 135 countries between 2012 and 2019, with a particular focus on developing countries. We construct a panel data collected from various sources such as World Development Indicator (WDI), …
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Efficiency improvements to the Groupe Special Mobile (GSM) digital mobile radio system
… methods. Due to the growing demand for mobile radio telephony as well as for data services, optimal usage of the scarce availability radio spectrum is becoming increasingly important. In this research, a protocol has been developed whereby the number of transmitted information packets over the …
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Energy-detection based spectrum sensing for cognitive radio on a real-time SDR platform
… boom; consequently raising the level of radio spectrum demand. However, spectrum is a limited resource and cannot be infinitely subdivided to accommodate every application. At the same time, emerging wireless applications require a lot of bandwidth for operation, and have seen exponential …
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Performance Analysis and Modelling of Spectrum Handoff Schemes in Cognitive Radio Networks. Modelling and Analysis of Spectrum Handoff Decision Schemes in Cognitive Radio Networks using the Queuing Theory and Simulation for Licensed and Unlicensed Spectrum Bands.
… is eventually controlled by the available radio frequency spectrum, government regulatory agencies have recently adopted a strict approach to the licensing of limited amounts of spectrum to different entities (e.g., public safety, military, service providers, unlicensed devices, and TV). …
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Spectrally Modulated Spectrally Encoded Framework Based Cognitive Radio in Mobile Environment
Radio spectrum has become a precious resource, and it has long been the dreamof wireless communication engineers to maximize the utilization of the radio spectrum. Dynamic Spectrum Access (DSA) and Cognitive Radio (CR) have been considered promising to enhance the efficiency and utilization of the …
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Interference Management in Spectrum Sharing Systems
Most of the radio spectrum is allocated to licensed services for their exclusive use. This has led to a shortage of spectrum for deploying new wireless services. However, measurements show that a large amount of radio spectrum allocated to licensed services is temporally and spatially …
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Outage performance of cooperative cognitive relay networks
… of cooperative relays into a cognitive radio network. Cognitive radio is a potential solution to the growing scarcity of radio spectrum and the increased demand for wireless services. Cooperative relay networks can help cognitive radios to improve their utilisation by reducing their …
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Coexistence of Wireless Systems for Spectrum Sharing
Sharing a band of frequencies in the radio spectrum among multiple wireless systems has emerged as a viable solution for alleviating the severe capacity crunch in next-generation wireless mobile networks such as 5th generation mobile networks (5G). Spectrum sharing can be achieved by enabling …
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Communication processes in the Hellenic fire corps: a comparative perspective
… failing to communicate because of inadequate radio spectrum) and natural disasters (such as earthquakes and forest fires).
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