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 7 of 7 for “"RF Propagation"”.
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Analysis of the Effect of the August 2017 Eclipse on the Ionosphere Using a Ray-trace Algorithm
… eclipses, including changes in radio frequency (RF) propagation at high frequency (HF). Such changes in RF propagation were observed by the Super Dual Auroral Radar Network (SuperDARN) radars in Christmas Valley, Oregon and in Fort Hays, Kansas during the 2017 eclipse. At each site, the westward …
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Use of GIS in Radio Frequency and Positioning Applications
… programs that are commonly used to store and perform calculations on terrain data, maps, and other geospatial data. GIS offers the latest terrain and building data as well as tools to process this data. This thesis considers three applications of GIS data and software: a Large Scale Radio …
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A Study of Electromagnetic Scattering of Communication Signals by Randomly Rough Surfaces
This research solves current RF propagation modeling gaps by modifying a single-frequency electromagnetic propagation analysis technique for use on communication signals and propagation channels. This research extended the Methods of Ordered Multiple Interactions (MOMI) algorithm to communication …
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Next-Generation Space Communications Technologies for Building Future Mars Connectivity
… Elevation Model (DEM) of the ``Red Planet" surface. Then, we formulate a framework for the design of heterogeneous ground-to-space multi-layered (3D) networks implementing Cloud Radio Access Networks (C-RAN) for ``Towards 6G" Martian connectivity. The results will spread from simulations of …
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An Antenna Specific Site Modeling Tool for Interactive Computation of Coverage Regions for Indoor Wireless Communication
… wireless communication is to strategically place RF base stations to obtain optimum signal coverage at the lowest cost and power. Traditionally, transceiver locations have been selected by human experts who rely on experience and heuristics to obtain a near-optimum placement. Current methods …
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DISTRIBUTED PHASED ARRAY ANTENNAS IN WIDE AREA RFID
… Frequency (UHF) Radio Frequency Identification (RFID) has gained importance over the past two decades in many applications such as stock management, asset tracking and access control. For wide area applications, Distributed Antenna Systems (DAS) have been used to obtain good coverage with few …
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Improving Implantable Medical Device Security Through Cooperative Jamming
… to create an overall effect of directing RF energy in a particular direction. Similarly, cooperative beamforming uses several physically separate "friendly" beamforming-capable devices to collectively send artificial noise to eavesdroppers while ensuring the signal is successfully received …