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 55 for “"Software Defined Radios"”.
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Design Space Decomposition for Cognitive and Software Defined Radios
Software Defined Radios (SDRs) lend themselves to flexibility and extensibility because they<br />depend on software to implement radio functionality. Cognitive Engines (CEs) introduce<br />intelligence to radio by monitoring radio performance through a set of meters and configuring<br />the …
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On robust and secure wireless communication system design using software-defined radios
… physical layer authentication, and software radio design for DARPA Spectrum Challenge. A common theme for the three distinct problems is the system perspective that we have adopted throughout this dissertation. Instead of considering isolated issues within these problems, we have …
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Rapid Prototyping of Software Defined Radios using Model Based Design for FPGAs
… of physical layer design of radio towards software, it becomes necessary to select or develop the platform and tools that help in achieving rapid design and development along with flexibility and reconfigurability. The availability of field programmable gate arrays (FPGAs) has promoted the …
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Design and Implementation of an Efficient SCA Framework for Software-Defined Radios
Software Defined Radio (SDR) is a relatively new approach to develop wireless communication systems. SDR presents a framework for developing flexible, reconfigurable devices intended to alleviate some of the issues arising from the evolution of wireless technology. The Software Communications …
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SdrLift: A Domain-Specific Intermediate Hardware Synthesis Framework for Prototyping Software-Defined Radios
Modern design of Software-Defined Radio (SDR) applications is based on Field Programmable Gate Arrays (FPGA) due to their ability to be configured into solution architectures that are well suited to domain-specific problems while achieving the best trade-off between performance, power, area, and …
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An evaluation of low cost fpga-based software defined radios for education and research
… purpose of this study is to evaluate a low-cost Software Defined Radio (SDR) platform for educational and research purposes. An evaluation of existing SDR platforms and design techniques was performed, identifying low cost hardware and software suitable for a laboratory environment. The idea …
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A hardware-defined approach to software-defined radios : improving performance without trading In flexibility
… Texas Instruments OMAP-L138 processor. Today's software-defined radios suffer from fundamental drawbacks that inhibit their use in practical settings. These drawbacks include their large sizes, their dependence on a PC for digital signal processing operations, and their inability to process …
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Facilitating Wireless Communications through Intelligent Resource Management on Software-Defined Radios in Dynamic Spectrum Environments
… on the impact resource management has on software-defined radio platforms by investigating the inherent trade-off between spectrum and processing effciencies with their relation to both the power consumed by the host processor and the complexity of the algorithm which it can support. The …
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Longer Term Dynamics of Bit Error Rates using Universal Software Radio Peripheral (USRP) Software Defined Radios for Indoor Environments
… of different modulation schemes using Software Defined Radios. Software Defined Radios provides inexpensive approach for engineering problems and paves way for its use in academics and research. We implemented our work using two Universal Software Radio Peripheral kits which are tested …
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Passive switched-capacitor based filter design, optimization, and calibration for sensing applications
This thesis discusses the limitations of wideband software defined radios (SDR). Spectrum sensing is identified as an important aspect required of SDR based cognitive radios. Several architectures and implementations are reviewed. An RF sampler followed by analog signal processing is identified as …
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Identification of Interfering Signals in Software Defined Radio Applications Using Sparse Signal Reconstruction Techniques
Software-defined radios have the agility and flexibility to tune performance parameters, allowing them to adapt to environmental changes, adapt to desired modes of operation, and provide varied functionality as needed. Traditional software-defined radios use a combination of conditional processing …
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A Low-Cost, Scalable Platform for Sub-Centimeter UHF RFID Positioning
… In this thesis, I explore how low-cost software-defined radios can be leveraged to overcome those three key issues with RFID localization. I contribute a low-cost, scalable, and portable RFID micro-location platform that can overcome real-world deployment issues such as RFID orientation. …
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A Zynq-based Cluster Cognitive Radio
Traditional hardware radios provide very rigid solutions to radio problems. Intelligent software defined radios, also known as cognitive radios, provide flexibility and agility compared to hardware radio systems. Cognitive radios are well suited for radio applications in a changing radio frequency …
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Reconfigurable SCA System Development Using Encapsulated Waveform Applications and Components
The Software Communications Architecture (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 …
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Analysis and Design of a Broadband Antenna for Software Defined Radio
… the very large bandwidth requirements of software-defined radios and to minimize the effective volume of the overall design. The antenna is composed of a vertical radiating element over a wound plane, and utilizes a tuning strap to improve the impedance bandwidth over the frequency range …
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Enhancing GNU Radio for Run-Time Assembly of FPGA-Based Accelerators
Software defined radios (SDRs) have changed the paradigm of slowly designing custom radios, instead allowing designers to quickly iterate designs with a large range of functionality. With the help of environments like the open-source project, GNU Radio, a designer can prototype radios with greatly …
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Machine Learning and Artificial Intelligence Methods for Cybersecurity Data within the Aviation Ecosystem
… focused on: (i) reverse engineering avionics and software certification; (ii) communications due to the rising new technologies of Software Defined Radios (SDRs); (iii) networking cybersecurity concerns such as the inter and intra connections of aircraft within the entire ecosystem.</p> <p>This …
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Establishment of a Cyber-Physical Systems (CPS) Test Bed to Explore Traffic Collision Avoidance System (TCAS) Vulnerabilities to Cyber Attacks
… to attacks from malicious actors with low cost software defined radios (SDR) and inexpensive open-source software (GNU radio) where spoofing TCAS radio signals in now possible. This paper outlines a proposed threat model for several TCAS vulnerabilities from an adversarial perspective. Periodic …
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Framework for Hardware Agility on FPGAs
… radio communications has been dominated by Software Defined Radios. However, research in industry and universities has successfully developed run-time reconfiguration tools to make FPGA designs more flexible and thus vastly reducing configuration times. Developers now have a more powerful …
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