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 19 of 19 for “"Interference Avoidance"”.
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Interference Avoidance and Mitigation in 5G and Beyond Networks
Interference remains a critical challenge in modern wireless networks, especially as nextgeneration systems are expected to operate under increasingly dense deployments, heterogeneous spectrum usage, and adversarial conditions. This thesis investigates two complementary approaches for mitigating …
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Interference Avoidance based Underlay Techniques for Dynamic Spectrum Sharing
… performance of the DSS network while causing no interference to the legacy radio system with which it coexists. We address this issue in our work by investigating desirable features for DSS with respect to the impact on a legacy radio system as well as the performance of a DSS network. It is …
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Developed mechanisms for cross-tier and co-tier interference avoidance in femtocell networks
… femtocell networks suffer from the problem of interference. In this thesis, a contribution to the existing research on the avoidance of interference in femtocell networks is presented.
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Use of Reinforcement Learning for Interference Avoidance or Efficient Jamming in Wireless Communications
… to adapt its transmission frequencies to avoid interference and potential malicious jammers. To that effect, we implement a reinforcement learning algorithm called contextual bandits. The harsh environment of an underwater channel provides a challenging problem. The channel may induce multipath …
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Fundamentals of Efficient Spectrum Access and Co-existence with Receiver Nonlinearity
… receiver performance by harmful adjacent channel interference in non-intuitive ways. Next generation wireless networks will see unprecedented diversity across receiver and radio technologies accessing the same band of spectrum in spatio-temporal proximity. Ensuring adjacent channel co-existence is …
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Radio Resource Allocation in Wireless OFDM Systems
… and a method to improve system performance with interference avoidance.
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Planar robotic mechanisms: analysis and configuration comparison
… analysis, workspace optimization, and link interference avoidance. Throughout this work, comparisons are made among three general manipulator configurations: serial, parallel-serial, and fully parallel. Strengths and limitations are discussed for each configuration type. This investigation …
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Automated Process Planning for Five-Axis Point Milling of Sculptured Surfaces
… to detect and eliminate possible machining interferences during the interpolation process between cutter locations (CLs). Such methods, making use of the enveloping surface of a cutter?s movement, work as remedies for the existing heuristic-based posture assignment process. Finally, …
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Analysis and Design of Cognitive Radio Networks and Distributed Radio Resource Management Algorithms
… to power control, dynamic frequency selection, interference avoidance, and network formation. It is believed that by applying the analysis techniques and the design guidelines presented in this document, any wireless engineer will be able to quickly develop cognitive radio and distributed radio …
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Cross-Layer Optimization and Distributed Algorithm Design for Frequency-Agile Radio Networks
… mechanisms such as spectrum sensing and primary interference avoidance into solid mathematical representation and thus drastically increase the accuracy of our model. The subsequent numerical study conforms well with existing empirical studies and provides fundamental insights on the design of …
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Resource Allocation and End-to-End Quality of Service for Cellular Communications Systems in Congested and Contested Environments
… the allocation, high bandwidth utilization, and interference avoidance. In order to justify the aforesaid modification, the interference from radar systems into the Long Term Evolution (LTE) as the predominant 4G technology is studies to confirm the possibility of the spectrum sharing. The …
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Capacity-approaching data transmission in MIMO broadcast channels
… over a distributed MIMO channel. Further, pre-interference cancellation allows for transmissions free of error propagation. A practical solution, termed Tomlinson-Harashima precoding (THP), is studied under this suboptimal scheduling algorithm. Similar to V-BLAST, a reordering is applied to …
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Efficient spectrum-handoff schemes for cognitive radio networks
… observations leads to the emergence of new interference scenarios. For instance, terrestrial wireless networks pose interference risks to mobile ground stations; while inter-satellite links can interfere with terrestrial radio astronomy observations. Terrestrial wireless networks, commercial …
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Learning Schemes for Adaptive Spectrum Sharing Radar
… control, adaptive cruise control, and collision avoidance, the need for radars which can adaptively tune specific transmission parameters in an intelligent manner to promote coexistence with other systems has arisen. Thus, fully-aware, dynamic, cognitive radar has been proposed as target for …
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Construction of FASR subsystem testbed and application for solar burst trajectories and RFI study
… opportunity to study the design, calibration and interference-avoidance requirements of FASR. In addition, FST provides, for the first time, the ability to perform broadband spectroscopy of the Sun with high spectral, temporal and moderate spatial resolution. With this three-element …
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Wireless Body Area Networks: Efficient Coexistence by Interference Management and Avoidance
… a reliable WBAN needs to be highly immune to interference. Based on the IEEE 802.15.6 standard devised for WBANs, nodes in a single WBAN can avoid interference by using techniques such as time division multiple access (TDMA). In fact, the social nature of these networks and their high mobility …
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Wireless Body Area Networks: Efficient Coexistence by Interference Management and Avoidance
… a reliable WBAN needs to be highly immune to interference. Based on the IEEE 802.15.6 standard devised for WBANs, nodes in a single WBAN can avoid interference by using techniques such as time division multiple access (TDMA). In fact, the social nature of these networks and their high mobility …
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Spectrum Opportunity Duration Assurance: A Primary-Secondary Cooperation Approach for Spectrum Sharing Systems
… detection, dynamic opportunity scheduling, and interference protection for the primary users, etc. This report proposes a Primary-Secondary Cooperation Framework to provide flexibility to all the involved parties in terms of choosing the level of cooperation that allow them to satisfy different …
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Some Optimization Problems in Wireless Networks
… that captures spatial multiplexing (SM) and interference cancellation (IC). We show that for a MIMO network with n randomly located nodes, each equipped with γ antennas and a rate of W on each data stream, the achievable throughput of each node is Θ(γW/√<span …