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 13 of 13 for “"wireless propagation"”.
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Advancements in Radar Sensing and Communications through Reconfigurable Intelligent Surfaces
… represents a promising technology for reshaping wireless channels, offering a new degree of freedom in the design of next-generation wireless networks. Specifically, RIS has shown significant potential in enabling smart, programmable environments by manipulating wireless propagation to establish …
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Prediction of Building Count and Dimensions from U.S. Census Data Using Multiple Regression
Providers of high-speed, wireless data services need to know where in their service area to place transmitters to reach potential customers. Viewshed analysis, a technique found in Geographic Information Systems (GIS) software, can be used to model propagation of the wireless signals from different …
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Propagation models for multiple-antenna systems : methodology, measurements and statistics
The trend in wireless communications is towards utilization of multiple antenna systems. While techniques such as beam-forming and spatial diversity have been implemented for some time, the emergence of Multiple-Input Multiple-Output (MIMO) communications has increased commercial interest and …
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Code design for the relay channel
The design of wireless communication networks is based on the premise that networks are collections of reliable point-to-point links between communicating nodes. Such a communication model, although simple, is inefficient because wireless propagation is not point-to-point in nature. It is more …
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Cooperative Strategies for Near-Optimal Computation in Wireless Networks
… have become increasingly central to the study of wireless networks. Network coding, in which intermediate terminals compute and forward functions of others’ messages, is instrumental in establishing the capacity of multicast networks. Averaging consensus, in which terminals compute the mean of …
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Intrinsically secure communication in large-scale wireless networks
… that exploit the inherent randomness of the propagation channels to significantly strengthen the security of digital communications systems. Motivated by recent developments in the field, this thesis aims at a characterization of the fundamental secrecy limits of large-scale wireless …
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Optimizing Wireless Network Throughput: Methods and Applications
… over the air overseas about a century ago, wireless communications have experienced dramatic improvements. Today's world sees the penetration of wireless communications into human life almost everywhere, from a simple remote control for TV to a cellular phone. With a better understanding of …
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Adaptive DS-CDMA multiuser detection for time variant frequency selective Rayleigh fading channel
The current digital wireless mobile system such as IS-95, which is based on direct sequence Code Division Multiple Access (DS-CDMA) technology, will not be able to meet the growing demands for multimedia service due to low information exchanging rate. Its capacity is also limited by multiple …
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An Information-Theoretic Examination of Next Generation Location Systems: The Role of LEOs, RISs and the Near Field
… intelligent surfaces (RISs), and near-field propagation—to enhance localization accuracy and resilience. LEO satellites, originally designed for communication, have recently seen widespread deployment through constellations such as Starlink, OneWeb, and Kuiper. Their growing presence presents …
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Design and Implementation of an Ultrabroadband Millimeter-Wavelength Vector Sliding Correlator Channel Sounder and In-Building Multipath Measurements at 2.5 & 60 GHz
Over the past decade, the market for wireless service has grown at an unprecedented rate. The industry has grown from cellular phones and pagers to broadband and ultra-broadband (also called ultra-wideband) wireless services that can provide voice, data, and full-motion video in real time. This …
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Data and Computation Modeling for Scientific Problem Solving Environments
… in the context of S4W, a sophisticated PSE for wireless system design.
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Characterization of Ultra Wideband Communication Channels
… particularly in short-range multiple access wireless communications. However, many important aspects of UWB-based communication systems have not yet been thoroughly investigated. The propagation of UWB signals in indoor environments is the single most important issue with significant impacts …
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Channel Probing for an Indoor Wireless Communications Channel
The statistics of the amplitude, time and angle of arrival of multipaths in an indoor environment are all necessary components of multipath models used to simulate the performance of spatial diversity in receive antenna configurations. The model presented by Saleh and Valenzuela, was added to by …