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 45 for “"spectrum management"”.
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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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Spectrum management in cognitive radio wireless networks
The wireless spectrum is currently regulated by government agencies and is assigned to license holders or services on a long-term basis over vast geographical regions. Recent research has shown that a large portion of the assigned spectrum is used sporadically, leading to underutilization and waste …
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Spectrum management for high efficiency photonic devices
Spectrum management holds great promise for high-performance photonics devices. Optical elements that split, up- or down-convert the available light to a specified spectrum can result in higher efficiencies in various devices such as photovoltaic cells, photodetectors, and electronic displays. In …
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Intelligent and Dynamic Spectrum Management for Beyond 5G
… ports, among others. This requires the optimised management of radio spectrum, where traditional rule-based techniques are facing serious challenges – they can hardly consider all network and slice combinations in 5G in order to fully exploit all the available degrees of freedom. To address this …
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Deep learning for energy-efficient wireless communications and spectrum management.
In the past couple of decades, wireless communication has undergone rapid development. The current fourth generation and upcoming fifth generation wireless technologies promise us an ultra-fast data rate. However, a lot of energy is sacrificed in order to guarantee high quality communication. …
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Spectrum Management Issues in Centralized and Distributed Dynamic Spectrum Access
Dynamic spectrum access (DSA) is a powerful approach to mitigate the spectrum scarcity problem caused by rapid increase in wireless communication demands. Based on architecture design, DSA systems can be categorized as centralized and distributed. To successfully enable DSA, both centralized and …
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Spectrum Management in Dynamic Spectrum Access: A Deep Reinforcement Learning Approach
Dynamic spectrum access (DSA) is a promising technology to mitigate spectrum shortage and improve spectrum utilization. However, DSA users have to face two fundamental issues, interference coordination between DSA users and protections to primary users (PUs). These two issues are very challenging, …
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Optical hot carrier solar cell: A general method of spectrum management in photovoltaics
… features of both a hot carrier solar cell and a spectrum up/down converter. Therefore, it is a valuable general method to explore spectrum management for solar cells. One goal of this study was to establish a comprehensive understanding of the device characteristics in both thermal equilibrium …
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UAV Communications: Spectral Requirements, MAV and SUAV Channel Modeling, OFDM Waveform Parameters, Performance and Spectrum Management
… and also on efficient waveform as well as spectrum management implementation. Because of limited research in wideband aeronautical channel modeling, we have derived an A2G channel prototype applicable to SUAV and MAV. As part of the research at Wire- less@VT in designing and prototyping …
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System Design and Evaluation of Spectrum Management Architectures for Co-Primary Sharing in the 37 GHz Band
… a system design framework for evaluating spectrum management architectures enabling co-primary access in the 37 GHz band. Motivated by increasing demand for mid-band and mmWave spectrum, and recent policy directions for federal-commercial sharing, this research investigates the trade-offs …
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New Approach to Dynamic Spectrum Management for DSL Environments = Contribución a la gestión dinámica del espectro en es escenarios DSL
… cables is the crosstalk among the lines. Dynamic spectrum management (DSM) was developed to combat this obstacle by allowing adaptive allocation of spectrum to various users in a multiuser environment as a function of the physical channel or by joint coordination on the signal level, so called …
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The importance of non-functional factors in explaining delegation to non-governmental agencies: the case study of radio spectrum
… 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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Policy Reasoning for Spectrum Agile Radios
… program proposes the use of Dynamic Spectrum Access (DSA) wherein intelligent radios can realize opportunistic usage of frequency bands by identifying the under-utilized spectrum and reasoning about it. Implementing such a flexible scheme requires changes in the current static …
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Spectrum decision making in distributed cognitive radio networks using an optimal foraging approach
… most promising technology for performing dynamic spectrum management. One of the major aspects of the spectrum management is referred to as the decision-making ability of CR users. Spectrum decision-making process involves the dynamic spectrum characterisation, selection as well as …
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WiMAX spectrum virtualization and network federation
Spectrum management in wireless broadband networks as regards its cost and its efficient usage has posed a huge challenge for mobile network operators. Traditionally, network operators had exclusive rights to access the band of spectrum allocated to them, but with the high price of spectrum …
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Dynamic Cellular Cognitive System
… communicate, and cooperate with high spectrum efficiency in a Dynamic Spectrum Access (DSA) scenario. DCCS can expand to a broad geographical distribution via linking to existing infrastructure. DCCS can quickly form a network to accommodate a diverse set of devices in natural disaster …
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Ex Ante Approaches for Security, Privacy, and Enforcement in Spectrum Sharing
… are devices that are capable of sensing the spectrum and using its free portions in an opportunistic manner. The free spectrum portions are referred to as white spaces or spectrum holes. It is widely believed that CRs are one of the key enabling technologies for realizing a new regulatory …
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Effective Resource Allocation for Non-cooperative Spectrum Sharing
Spectrum access protocols have been proposed recently to provide flexible and efficient use of the available bandwidth. Game theory has been applied to the analysis of the problem to determine the most effective allocation of the users’ power over the bandwidth. However, prior analysis has focussed …
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Enabling Dynamic Spectrum Access in 4G Networks and Beyond
… demand, operators may choose to deploy a Dynamic Spectrum Access (DSA) overlay. Spectrum regulation is following suit, with regulators attempting to incorporate spectrum sharing through the design of spectrum access rules that support DSA. This dissertation explores the idea of DSA applied to Long …
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Market impact of software radio : benefits and barriers
… relax the need for standardization and improve spectrum management policies.
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