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 46 for “"Over-the-Air"”.
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Deployment of a next generation networking protocol
This thesis presents experimental verification of the performance of Group Centric Networking (GCN), a next generation networking protocol developed for robust and scalable communications in lossy networks where users are localized to geographic areas, such as military tactical networks. In …
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Marginal formations and the production of culture: The case of college music
During the 1980s, college music--music disseminated over the air waves of college radio stations and/or produced in college environments--emerged onto the national (and international) scene; it earned its own trade paper, the College Music Journal, its own chart in Rolling Stone, and it became the …
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Nonlinear Doppler Warp Correction for Acoustic OFDM
The Underwater Acoustic (UWA) channel has been an area of interest for many researchers and engineers, but also a very challenging area. Compared to the over-the-air radio frequency (RF) channel, the underwater acoustic channel causes multiple distortions – due to multipath, frequency selectivity, …
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OFDM for Underwater Acoustic Communication
… engineers, and practitioners alike. One of the main reasons for the slow rate of progress in this area is that the underwater acoustic channel is in general much more hostile — in terms of multipath, frequency selectivity, noise, and the Doppler effect — than the over-the-air radio frequency …
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Software-Defined Radio Implementation of Two Physical Layer Security Techniques
This thesis discusses the design of two Physical Layer Security (PLS) techniques on Software Defined Radios (SDRs). PLS is a classification of security methods that take advantage of physical properties in the waveform or channel to secure communication. These schemes can be used to directly …
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Using enhancement data for deinterlacing 1080i high definition television
… (HDTV) to remove unsightly artifacts. U.S. over-the-air television broadcasting is scheduled to switch to an all-digital format in June, 2009. Therefore, we are ready for a new system which will improve HDTV. A receiver compatible system can add a small bitrate enhancement stream and enable …
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A framework for global business strategy planning for the wireless telecommunication carrier
Within 27 years from 1979 when the first analogue cellular telephone system was launched, the Wireless Telecommunication industry has evolved drastically. Its technology and service are now in third generation: 3G, and already moving forward to 4G. Within a few years, it will enable the exchange of …
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Spectrum-Aware Orthogonal Frequency Division Multiplexing
… computing architectures are well suited for the dynamic data flow processing requirements of software-defined radio. The software radio concept has quickly evolved to include spectrum sensing, awareness, and cognitive algorithms for machine learning resulting in the cognitive radio model. …
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MAC Layer DATA/ACK Handshake in the Hybrid VLC-RF System
The hybrid VLC-RF system utilizes a uni-directional VLC link for downlink and the legacy Wi-Fi link for uplink transmission. However, simply integrating the two links without any modi cation in the MAC layer would cause problems for the MAC layer DATA/ACK handshake. The acknowledgements for VLC …
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Physics-based Security Analysis of Controller Area Network Protocols
… that are controlled by electronic units. These electronic units are connected via wired bus networks, and data for controlling the automobile is exchanged among the electronic units using in-vehicle network protocols. The in-vehicle network protocols were designed to be isolated from …
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Utilization of a Microbubble Dispersion to Increase Oxygen Transfer in Pilot-Scale Baker's Yeast Fermentation Unit
In the large-scale production of <i>Saccharomyces cerevisiae</i> (baker's yeast), oxygen transfer, which is one of the major limiting factors, is improved by using high agitation rates. However, high agitation rates subject the microorganisms to high shear stress and caused high power consumption. …
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Extração de granito e impactos ambientais em Sobrado – PB.
The exploitation of mineral resources is of extreme importance to the economy of a country or even a region, however this kind of activities can compromise the environment and even the population that lives near the mining action. This study has for general objective identify and characterize the …
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VT-STAR design and implementation of a test bed for differential space-time block coding and MIMO channel measurements
… single-input multiple-output (SIMO) channel in the reverse link, meaning one transmit antenna at the user terminal and multiple receive antennas at the base station. Recently, information theoretic research has shown an enormous potential growth in the capacity of wireless systems by using …
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On the Use of Uncalibrated Digital Phased Arrays for Blind Signal Separation for Interference Removal in Congested Spectral Bands
… spectrum becoming increasingly more congested, the need for robust, adaptive communications to take advantage of spatially-separated signal sources is apparent. Traditional phased array beamforming techniques used for interference removal rely on perfect calibration between elements and precise …
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A novel OFDM Blind Equalizer: Analysis and Implementation
… This technique has become more feasible with the recent appearance of Software Defined Radios (SDRs), which allow easy reconfiguration of their parameters via software. As the environment changes over time, the transmitter needs to be able to effectively estimate its performance under …
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RadioSTAR (Radio Spacecraft for Telecommunications Assessment and Risk-reduction): A 3U CubeSat for validation of ground stations and link budgets
As the number of small satellites in orbit increases, an increasing number of ground stations must be constructed, recommissioned, or updated in order to provide uplink and downlink access. However, prior to deployment of a spacecraft, it is difficult to evaluate a ground station’s performance …
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Bluetooth Frequency Hop Selection Kernel Impact on "Inter-Piconet" Interference
The Bluetooth wireless transmission standard provides a low-power data link between electronic devices over relatively short ranges. These links, also known as piconets, transmit using frequency hopping spread spectrum (FHSS) to send information over the air. As more applications for Bluetooth …
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Towards NextG Receiver: Online Real-Time Machine Learning with Domain Knowledge for Wireless Communications
… intelligence (AI) and machine learning (ML) into the air interface to meet increasingly stringent performance demands. Multiple-input multiple-output (MIMO) and its variants, such as massive MIMO, have been key enablers across successive generations of cellular networks with evolving design …
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Adversarial RFML: Evading Deep Learning Enabled Signal Classification
… wireless communications. Researchers have shown the ability to leverage deep neural networks (DNNs) that operate on raw in-phase and quadrature samples, termed Radio Frequency Machine Learning (RFML), to synthesize new waveforms, control radio resources, as well as detect and classify signals. …
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Application framework for wireless sensor networks [thesis]
… innovative technologies that had revolutionized the methods in which we interact with the environment; i.e., through sensing the physical (e.g., fire motion, contact) and chemical (e.g., molecular concentration) properties of the natural surroundings. The hardware in which utilized by WSNs is …
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