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 12 of 12 for “"Reconfigurable Radio"”.
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A Physical Layer Implementation of Reconfigurable Radio
… communications will demand the use of software radio technology as the basic architecture to support multi-standard, multi-mode and future-proof radio designs. Software-defined radios are configurable devices in which the physical layer can be reprogrammed to support various standards. Field …
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It is I: An Authentication System for a Reconfigurable Radio
The security of a radio system hinges on its ability to effectively authenticate a user. This work proposes a two-factor authentication scheme using a token and a biometric. The users' access rights are determined during authentication and the users are served only those channels of data that they …
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Design and Implementation of Radio Frequency Power Feeding Networks for Antenna Array Applications: Simulation and Measurements of Multiport, Equal and Unequal, Fixed and Reconfigurable Radio Frequency Power Feeding Networks for Narrow and Ultra-Wideband Applications
… dividers are vital components and widely used in radio technology, such as antenna arrays, power amplifiers, multiplexers and mixers. A good example is the well-known Wilkinson power divider with its distinctive feeding network characteristics. A comprehensive review indicated that limited …
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Wideband Autonomous Cognitive Radios: Spectrum Awareness and PHY/MAC Decision Making
The cognitive radios (CRs) have opened up new ways of better utilizing the scarce wireless spectrum resources. The CRs have been made feasible by recent advances in software-defined radios (SDRs), smart antennas, reconfigurable radio frequency (RF) front-ends, and full-duplex RF front-end …
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A frequency reconfigurable circularly polarized microstrip patch antenna using liquid metal microswitches
Reconfigurable antennas with adaptable frequency, pattern, and polarization offer flexibility and size reduction for wireless systems that must increasingly execute multiple missions with less volume. These antennas will also complement anticipated cognitive radio systems, which promise more …
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Digital Hardware Design Decisions and Trade-offs for Software Radio Systems
Software radio is a technique for implementing reconfigurable radio systems using a combination of various circuit elements and digital hardware. By implementing radio functions in software, a flexible radio can be created that is capable of performing a variety of functions at different times. …
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Efficient Radiometric Signature Methods for Cognitive Radio Devices
… first comprehensive study and new methods for radiometric fingerprinting of the Cognitive Radio (CR) devices. The scope of the currently available radio identification techniques is limited to a single radio adjustment. Yet, the variable nature of the CR with multiple levels of parameters and …
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An 8 GHz Ultra Wideband Transceiver Testbed
Software defined radios have the potential of changing the fundamental usage model of wireless communications devices, but the capabilities of these transceivers are often limited by the speed of the underlying processors and FPGAs. This thesis presents the digital design for an impulse-based ultra …
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Embedded microvascular networks for electronically reconfigurable materials
… at room temperature is used to reconfigure radio frequency wireless signal devices. Previous work has focused on the use of microelectromechanical systems, solid state diodes, or physical actuation to reconfigure such devices, but various problems limit the applicability of these solutions …
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Embedded Software-Defined Radio Architectures for 6G Cellular Networks
… 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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Reconfigurable SCA System Development Using Encapsulated Waveform Applications and Components
… (SCA) is a standard for software defined radios (SDR) designed in part to promote code reuse for long-term development. With the emergence of adaptive/cognitive radios, new SDRs that are capable of reconfiguration during runtime must be developed. One advantage of SDR development over …
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Microvascular materials for adaptive electronic structures
… electromagnetic reconfiguration. In particular, reconfigurable radio-frequency (RF) systems enabled by microvascular networks containing conductive liquids overcome many of the challenges faced by traditional reconfiguration mechanisms such as microelectromechanical systems (MEMS), varactors, and …