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 185 for “"SDR"”.
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Recepción y decodificación de imágenes meteorológicas via SDR
… persona mediante una antena y un receptor SDR (Software Defined Radio). Los dispositivos de Radio Definida por Software permiten que muchas de las funciones que tradicionalmente se hacían mediante hardware ahora se realicen mediante software en un ordenador, e incluso sistemas como una …
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Implementations of Multi-Antenna Systems in a USRP Based SDR using Simulink
… hardware, typically only an RF front end, an SDR allows for as much of the signal processing as possible to be done via software. The benefits of utilizing software for signal processing in place of hardware are numerous. In some cases, like this work, parameters of operation may need to be …
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Implementação de um analisador de espectro utilizando o conceito rádio definido por software (SDR)
… características que definem um dispositivo SDR, tanto em nível de hardware quanto a nível de software. O SDR é parte importante para a implementação de rádios cognitivos (CR), que é peça fundamental para o uso eficiente do sistema 5G. O presente trabalho visa abordar como foi feita a …
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Energy-detection based spectrum sensing for cognitive radio on a real-time SDR platform
… is developed on the Software-Defined Radio (SDR) testbed that is built with Universal Software Radio Peripheral (USRP) devices, and on the GNU Radio software platform. The noise floor of the system is first analysed to determine the detection threshold, which is obtained using the empirical …
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Symbol Timing and Coarse Classification of Phase Modulated Signals on a Standalone SDR Platform
… implementation aims to run on a Lyrtech SFF SDR platform and uses its FPGA and DSP modules for implementation. This platform is one of the more advanced SDR platforms available, and the aim is to develop parts of the UCS system to run on this platform. The aim is to eventually develop the …
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Exploring the Vulnerabilities of Traffic Collision Avoidance Systems (TCAS) Through Software Defined Radio (SDR) Exploitation
… Radio and inexpensive Software Define Radios (SDR). Therefore, this thesis presents motivation through analytical and experimental means for more investigation into TCAS from a security perspective. Methods for analyzing TCAS both qualitatively and quantitatively from an adversarial perspective …
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PicoRF: A PC-based SDR Platform using a High Performance PCIe Plug-in Card Extension
… services, attention has been directed to SDRs due to their programmable nature and the flexibility they can offer in operating over multiple standards. In addition, they can provide effective solutions to current challenges in wireless communication, such as spectrum overcrowding and …
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Configurable SDR Operation for Cognitive Radio Applications using GNU Radio and the Universal Software Radio Peripheral
… military officers. Using Software Defined Radio (SDR) technology, a flexible radio platform can be potentially configured using a Cognitive Engine (CE) to transmit and receive many different incompatible radio standards. In this thesis, an interface between a Cognitive Engine and an SDR platform …
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A domain specific language for facilitating automatic parallelization and placement of SDR patterns into heterogeneous computing architectures
… language (DSL) for software defined radio (SDR) which is referred to as OptiSDR. The main objective of OptiSDR is to facilitate the development and deployment of SDR applications into heterogeneous computing architectures (HCAs). As HCAs are becoming mainstream in SDR applications such as …
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Component-Based Design and Service-Oriented Architectures in Software-Defined Radio
Software-Defined Radio (SDR) is a large field of research, and is rapidly expanding in terms of capabilities and applications. As the number of SDR platforms, deployments, and use-cases grow, interoperability, compatibility, and software re-use becomes more difficult. Additionally, advanced SDR …
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A Calibration Method for a Controlled Reception Pattern Antenna and Software Defined Radio Configuration
… antenna (CRPA) using a Software Defined Radio (SDR) configuration. The combination CRPA and SDR system consists of a low-cost 7-element configuration where the antenna RF inputs are feed directly into the multi-channel SDR system. This combination CRPA and SDR system was characterized in an …
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Why Are Some Watersheds More Sediment-Productive Than Others? An Explainable AI Approach
The Sediment Delivery Ratio (SDR) represents the proportion of eroded sediment within a watershed that ultimately reaches its outlet. Sediment yield (SY) is defined as the amount of sediment exported from a watershed outlet per unit time, normalized by drainage area. Quantifying the spatial …
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A Reconfigurable Random Access MAC Implementation for Software Defined Radio Platforms
… has benefited from the development of flexible, SDR platforms. SDR is used for military applications in radio devices to reconfigure waveforms, frequency, and modulation schemes in both software and hardware to improve communication performance in harsh environments. In the commercial sector, …
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Heterogeneous Processing in Software Defined Radio: Flexible Implementation and Optimal Resource Mapping
… advantages provided by Software Defined Radios (SDRs) have made them useful tools for communication engineers and academics alike. The ability to support a wide range of communication waveforms with varying modulation, encoding, or frequencies on a single hardware platform can decrease production …
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Multikomponentenspende : Verfahren, Qualität der Blutprodukte, Spendersicherheit und therapeutische Wirksamkeit
… pathophysiologischen Auswirkungen speziell des SDR-Protokolls der Multikomponentenspende auf den Spender. Es wurden 27 gesunde Spender gemäß der gültigen DGTI-Richtlinien ausgewählt. Zwei Protokolle wurden verwendet: Das SDR-Protokoll (n = 15 Spender) ergab je Spender zwei in-line-filtrierte …
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GPU Integration into a Software Defined Radio Framework
<p>Software Defined Radio (SDR) was brought about by moving processing done on specific hardware components to reconfigurable software. Hardware components like General Purpose Processors (GPPs), Digital Signal Processors (DSPs) and Field Programmable Gate Arrays (FPGAs) are used to make the …
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Design of Software Defined Radio for SuperDARN Radar
Software defined radio (SDR) is a rapidly developing field enabled by continuing improvements in digital electronics. Software defined radio has been used extensively in communication systems due to its flexibility and cost effectiveness. Recently, SDR has been incorporated into radar systems, …
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Dynamic reconfiguration methods in FPGA-based softawre defined radio system for wireless mobile standards
… the design of a Software Defined Radio (SDR) platform, which is aimed at supporting multiple standards and services for consumer applications with a high degree of flexibility, is of growing interest. SDR has been primarily associated with military applications to date. Field Programmable …
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IEEE 802.15.4 Implementation on an Embedded Device
Software Defined Radio (SDR) is a growing technology that allows radio communication to become interoperable. SDR can lower the cost for a particular hardware radio to communicate with another radio that uses a different standard. In order to show the capability of SDR, this thesis shows how to …
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Extruded Cellular Fly Ash Construction Materials
… Typical bulk densities, crushing strengths, and SDR obtained were 1.13 g/cm$\sp3,$ 97 MPa (14,100 psi), and 8750 m for autoclaved honeycombs, and 1.32 g/cm$\sp3,$ 156 MPa (22,600 psi), and 12,000 m for sintered honeycombs. The SDR values obtained exceeded the SDR of construction-grade pine (6375 …
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