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 21 for “"digital radio"”.
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A digital radio modem for the Mobile Robot Project
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1985.
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The design and implementation of a wideband digital radio receiver
Historically radio has been implemented using largely analogue circuitry. Improvements in mixed signal and digital signal processing technology are rapidly leading towards a largely digital approach, with down-conversion and filtering moving to the digital signal processing domain. Advantages of …
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Digital communication and control circuits for 60ghz fully integrated CMOS digital radio
… requirements. The 60GHz Integrated CMOS digital radio chipset comprises of PHY and MAC layers, RF transceiver, High-Speed Digital Interface and an underlying Serial Communication Fabric. To have a complete communication solution compliant with the latest ECMA-369, ISO/DIS 13156 and IEEE …
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Digital radio and its application in the HF (2-30 MHz) band
… has a significant impact on the performance of radio systems (especially data communications). However, the ability to communicate information over very long ranges using ionospheric propagation paths without any intermediate infrastructure makes the use of HF attractive for many applications. …
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The design and use of a digital radio telemetry system for measuring internal combustion engine piston parameters.
During the course of this project, a digital radio telemetry system has been designed and shown to be capable of measuring parameters from the piston of an internal combustion engine, under load. The impetus for the work stems from the need to sample the appropriate data required for oil …
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An investigation into the performance of a power-of-two coefficient transversal equalizer in a 34Mbit/s QPSK digital radio during frequency-selective fading conditions
… propagation can occur. The interaction of radio waves arriving at a receiver, having travelled via paths of differing length, results in the phenomenon of frequency-selective fading. This phenomenon manifests as a notch in the received spectrum and causes a severe degradation in the …
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Embedded Software-Defined Radio Architectures for 6G Cellular Networks
… has resulted in substantial advancements in digital radio technologies. Each new generation of cellular technology, beginning with 1G, has introduced novel use-case scenarios that have challenged the performance of the prevailing digital radio architectures. The newly proposed scenarios for …
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Electronically tuned 23 GHz Gunn oscillators for a microwave datalink
… identified for 23 GHz, short-haul, low-capacity, digital radio. The dissertation presents the development of the varactor controlled Gunn oscillators that constitute the crystal locked microwave sources of the radio. An accurate description of a design procedure for Gunn oscillators at 23 GHz is …
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Diffusion Challenges for Innovation in Technology-Intensive Industries
… research is performed on the unique case of digital radio diffusion in Germany. Barriers evolve by this method in addition to barriers, which so far are described in a theoretical framework. These barriers are researched empirically via an international survey with close to one thousand …
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A nonlinear dynamic system for spread spectrum code acquisition
… which has previously been implemented by a Digital Signal Processor chip in digital wireless receivers. We eventually hope to produce a novel physical system which exhibits the nonlinear dynamics we require, thereby creating one of the first nonlinear dynamic systems engineered to perform a …
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Wideband Propagation Measurement Results, Simulation Models, and Processing Techniques for a Sliding Correlator Measurement System
Radio wave propagation measurements provide a way to accurately and reliably characterize environments to assist in the development and optimization of wireless communication systems. As digital radio systems occupy wider bandwidths and use multipath signal combining to enhance quality of service, …
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An investigation into non-linear propagation of MSK with a view to specifying an adaptive equalizer
… effects of non-linear propagation on a proposed digital microwave radio link which employs MSK modulation, in order to specify a suitable form of adaptive equalization. MSK is a coherent modulation technique, having improved spectral roll-off over FSK because it avoids the abrupt phase changes at …
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Implementation of a DVB-T2 passive coherent locator demonstrator
… interests in FM (analogue) and DVB-T/T2, DAB (digital) radio frequency signals has seen significant focus as possible illuminators for radar processing. The University of Cape Town (UCT) , in particular, has extensive history on passive radar research including the implementation of a full …
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Broadcasting La Presencia Latina: Tracing Identities Across Fields of Interaction in Rural Minnesota
… field sites: (1) a Spanish-language community radio program I call La Gran Comunidad Latina (LGCL); (2) a college-level civic engagement Spanish conversation course titled Noticias Comunitarias (NC) designed and taught in partnership with LGCL; and (3) an antiracist coalition collaboratively …
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X-band Doppler simulator for sport projectile radars
… on the application, these devices use either the digital radio frequency memory (DRFM) or direct digital synthesis (DDS) simulation method. Developing Doppler simulators as a diagnostic tool for sport Doppler radars is a growing need to evaluate and assess the performance of these radars. This …
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Delivering a Public Service? The BBC Asian Network and British Asian audiences.
… Asian Network, the BBC’s only ethnic specific digital radio station, construct a distinctive audience for the broadcaster. The study looks at the challenges, barriers and conflicts that have emerged as a consequence of BBC strategic attempts to make the radio station relevant for younger …
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Radio's digital dilemma: broadcasting in the 21st century
… behind the development and proliferation of digital audio broadcasting (DAB). Radio is the last of the traditional mass media to navigate the convergence phenomenon; convergence itself has an inherently disruptive effect on traditional media forms. However, in the case of radio, this …
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Radio and its listenership in the internet age: case studies of the Voice of Vietnam (VOV) and VOVNews.
After approximately 100 years of radio, it is inevitable that radio in Western countries not only survives but also develops, despite fierce competition with visual media. However, having competed with other media for more than 15 years, radio in Vietnam is experiencing a significant loss of …
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Scalable and Reconfigurable Optical Switches: From Network Design to System Application
… optical network with the combination of digital radio-over-fibre (DRoF) and data service is proposed, where the silicon-based switch-and-select MRR switch fabric provides multiple functionalities such as wavelength-selective switching, multicast switching and space switching. The proposed …
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