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 53 for “"Radio network"”.
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Cognitive Radio Network Testbed: Design, Deployment, Administration and Examples
Development of Cognitive Radio (CR) applications, which rely on a radio's ability to adapt intelligently to it's spectral surroundings will soon make the all important technological jump from research interest to systems integration, as demand for highly adaptive wireless applications expand. …
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Fine-scale modelling of rain fields for radio network simulation
… of Service (QoS) at a node in heterogeneous networks of line-of-sight, terrestrial, microwave links; requires knowledge of the spatial and temporal statistics of rain over scales of a few meters to tens or hundreds of kilometres, and over temporal periods as short as one-second. Current …
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Performance analysis of FBMC over OFDM in Cognitive Radio Network
Cognitive Radio (CR) system is an adaptive, reconfigurable communication system that can intuitively adjust its parameters to meet users or network demands. The major objective of CR is to provide a platform for the Secondary User (SU) to fully utilize the available spectrum resource by sensing the …
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A Performance Analysis of a CSMA Multihop Packet Radio Network
In a packet radio network, multiple terminals broadcast information over a shared communications medium. Messages are transmitted from a source terminal to a destination terminal over multiple relays or hops. The actions of one terminal in the network directly affect the actions of other terminals …
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Some combinational optimization problems on radio network communication and machine scheduling
… from two areas are studied in this dissertation: network communication and machine scheduling. In the network communication area, the complexity of distributed broadcasting and distributed gossiping is studied in the setting of random networks. Two different models are considered: one is random …
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Dynamic sensing and signaling over the packet radio network multiple access channel
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 1987
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System Architecture for Weather, Road Condition, and Vehicle Data Telemetry via Low Bandwidth Radio Network
… Access Communications System bandwidth-limited radio network to a central server for analysis by data customers including the Federal Highway Administration and the National Center for Atmospheric Research. The architecture is fault-tolerant, facilitates remote debugging via its debug logs, and …
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Application of Computational Intelligence in Cognitive Radio Network for Efficient Spectrum Utilization, and Speech Therapy
… communication scheme. Advanced Cognitive Radio (CR) network or Dynamic Adaptive Spectrum Sharing is one of the ways to optimize our wireless communications technologies for high data rates while maintaining users’ desired quality of service (QoS) requirements. Scanning a wideband spectrum …
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Adaptive and autonomous protocol for spectrum identification and coordination in ad hoc cognitive radio network
The decentralised structure of wireless Ad hoc networks makes them most appropriate for quick and easy deployment in military and emergency situations. Consequently, in this thesis, special interest is given to this form of network. Cognitive Radio (CR) is defined as a radio, capable of identifying …
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Distributed computation on unreliable radio channels
An important topic in wireless networking is the development of reliable algorithms for environments suffering from adversarial interference. This term captures any type of channel disruption outside the control of the algorithm designer-from contention with unrelated devices to malicious jamming. …
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Power Control and Resource Allocation for QoS-Constrained Wireless Networks
… dynamic spectrum access schemes and cognitive radio techniques in this dissertation. Our work includes the modelling, characterization and optimization of QoS-constrained cooperative networks and cognitive radio networks. QoS constraints such as delay and data rate are modelled. To solve power …
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Transceiver design for wireless energy harvesting cooperative networks
… technique is studied in the cooperative wireless network, and different optimization studies are investigated. First, an energy-efficient optimization is considered in the cooperative system with the time switching relaying and power splitting relaying protocols. Then, a security issue in the …
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Energy and Spectral Efficient Wireless Communications
… communication systems, such as wireless sensor network (WSN) designed for structure health monitoring (SHM), medium access control (MAC) for multi-user systems, and cooperative spectrum sensing in cognitive radio systems.</p> <p>First, to improve the energy efficiency in SHM WSN, a new ultra low …
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Wireless local loop and packet radio technology for developing communities
… countries is the lack of adequate telephone network infrastructure. The current problem, especially in Africa, is to find solutitlns which can provide underdeveloped countries with a satisfactory network. This requires 8 relatively fast roll-out at low-cost. Modern wireless system claim to …
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COGNITIVE RADIO CLUSTERING ALGORITHM FOR SWARMS USING NEURAL NETWORKS
… in and outside the military. A cognitive radio network is an approach that opportunistically exploits the broadcasting spectrum. The basic concept includes classifying users into two types: primary and secondary. The primary users have priority in the resource allocation process, while the …
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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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Learning-based adaptive design for dynamic spectrum access in cognitive radio networks.
… with dynamic spectrum access in cognitive radio networks. The main objective is designing online learning and access policies which maximize the total throughput of the secondary users in a cognitive radio network. As the first approach, we consider the auction-based formulation in design …
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Distributed Localization for Wireless Distributed Networks in Indoor Environments
… for mobile devices, computers, and even tactical radios. From the collected location information, location-based services can be realized. One type of positioning system is based on location fingerprints. Unlike the conventional positioning techniques of time of or time delay of arrival (TOA/TDOA) …
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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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Capacity and Throughput Optimization in Multi-cell 3G WCDMA Networks
… computation of the traffic density in a cellular network, which can be used to optimize the placement of base stations and radio network controllers as well as to analyze the performance of resource management algorithms towards meeting the final goal: the calculation and maximization of network …
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