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 710 for “"Wireless networks"”.
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Cooperation in Wireless Networks
… capacity and reliability. However, equipping a wireless node with multiple antennas may not be practical, as the footprint of multiple antennas may not fit on a wireless node (particularly on handheld wireless devices). In order to achieve spatial diversity without requiring multiple antennas on …
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Towards self-organizing wireless networks
The concept of self-organizing networks is a promising approach to address fundamental challenges in current and future wireless networks. Not least the dense and heterogeneous nature of the networks, the scarcity of resources, and high costs of manual configurations necessitate efficient …
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Localizing Jammers in Wireless Networks
<p>The open nature of wireless communication makes it easy for adversaries to either inject random signals to wireless channels harming the network availability, or eavesdrop on the communication breaching the location privacy. Those threats are challenging to cope with, because most of them cannot …
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Decentralised Algorithms for Wireless Networks.
Designing and managing wireless networks is challenging for many reasons. Two of the most crucial in 802.11 wireless networks are: (a) variable per-user channel quality and (b) unplanned, ad-hoc deployment of the Access Points (APs). Regarding (a), a typical consequence is the selection, for each …
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Throughput Performance of Wireless Networks
The advancement in wireless communication technologies have resulted in the evolution of wireless networks from the traditional circuit-switched networks which initially support voice calls to packet-switched networks which support data transmission at variable rates. The exibility and eciency of …
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Layering principles for wireless networks
… amounts of data over a fixed bandwidth in wireless networks necessitates the engineering of communication schemes with ever-increasing efficiencies. In this context, it is imperative to obtain a fundamental understanding of wireless networks and the engineering architectures that can …
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Interference management in wireless networks
The world is going wireless, and the availability of high-speed ubiquitous wireless connectivity is being taken for granted. Along with high bandwidth consuming applications such as high-definition video, mobile devices such as smartphones and tablets are becoming omnipresent. The legacy wireless …
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Scalable millimeter wave wireless networks
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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Interference management in wireless networks
Interference management in wireless networks has emerged as an important task in order to meet the increased demand for data. In this thesis, interference management through cooperative transmission in the downlink is studied for a cellular network. Degrees of freedom (DoF) gains are first studied …
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Optimal control for wireless networks
… thesis is to design an efficient routing, and wireless link scheduling policy, that maximizes net throughput. Currently, the only known throughput-optimal policy is the Backpressure policy for the unicast problem. In this thesis, we propose provably optimal algorithms for the broadcast and the …
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Cooperative multicast in wireless networks
Wireless communication has fundamental impairments due to multi-path fading, attenuation, reflections, obstructions, and noise. More importantly, it has historically been designed to mimic a physical wire; in concept other communicators in the same region are viewed as crossed wires. Many systems …
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Adaptive channels for wireless networks
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Cooperative routing in wireless networks
… problem of energy efficiency and reliability in wireless ad-hoc networks. First, we introduce the idea of wireless cooperation advantage. We formulate the problem of finding the minimum energy cooperative route for a wireless network under idealized channel and receiver models. Fundamental to the …
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Spatial reuse in TDMA wireless networks
… investigate the performance of spatial reuse in wireless networks. More specifically, we investigate the performance of location-based spatial reuse built upon the identification of links in the network that form Collision-Free Sets (CFSs). We develop algorithms that efficiently find such CFSs. …
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Enhancing TCP delivery over wireless networks
Wireless communication has become a significant life style in the daily use. The wireless communication can be used to extend the service of wired communication. Based on the idea of simplicity, Transmission Control Protocol (TCP) has been used widely over wired network. When network applications …
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Low Complexity Scheduling in Wireless Networks
… bottleneck in the efficient design and controlof wireless networks. Owing to the high computational complexity of throughputoptimallink schedulers, low-complexity schedulers such as Greedy Maximal Scheduling(GMS)that often yield good throughput performance have received significantattention in the …
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Digital video transmission over wireless networks
… At the same time the second-generation digital wireless networks, and the third-generation networks being developed, have enough bandwidth to support digital video services. The radio propagation medium is a difficult environment in which to deploy low bit error rate, real time services such as …
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Localized Topology Control in Wireless Networks
Finally, we consider power-efficient broadcast in wireless ad hoc networks as an application of the proposed topology control algorithms, and propose Broadcast on Local Spanning Subgraph (BLSS), which broadcasts in a constrained flooding fashion over the network topology by FLSS. We show that BLSS …
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Multichannel Wireless Networks: Capacity and Protocols
… the asymptotic capacity of multichannel wireless networks with varying number of channels and interfaces. Capacity analysis has shown that it is feasible to effectively use a large number of channels even with only a few interfaces per node. Based on insights from the capacity analysis, …
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