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 20 for “"radio receivers"”.
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Design of Integrated, Low Power, Radio Receivers in BiCMOS Technologies
… of integration in modern electronic products, radio receiver designs continue to rely on discrete LC, ceramic, and electro-acoustic devices for the realization of RF and IF bandpass filtering. Although considerable research has been directed at developing suitable switched-capacitor and Gm-C …
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High-speed data conversion for digital ultra-wide-band radio receivers
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
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Analysis and Dynamic Range Enhancement of the Analog-to-Digital Interface in Multimode Radio Receivers
… reconfiguration are needed. These "software radios" are distinguished from their traditional counterparts by their strong reliance on digital channel filtering and demodulation which may be reprogrammed to receive different standards. In these radios, higher dynamic range is required from the …
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Decision-theoretic techniques for the development and use of side information in frequency-hop radio receivers
… noise. Because of the complexity of the Bayesian receivers for systems with frequency-hop multiple-access interference, it is desirable to find good approximations to the Bayesian decision rule that require lower complexity. Approximations are presented that result in a negligible loss in …
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Detecting and locating electronic devices using their unintended electromagnetic emissions
… initiators. The unintended emissions of radio receivers and microcontrollers are analyzed. These emissions are low-power radio signals that result from the device's normal operation. In the first section, it is demonstrated that arbitrary signals can be injected into a radio receiver's …
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A low-power reconfigurable analog-to-digital converter
… resolution signals such as video and low I.F. in radio Receivers, low frequency and high resolution signals from seismic sensors and MEMs devices, and others that fall in between these extremes such as audio, voice and general purpose data-acquisition. This converter also incorporates several …
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Modulation techniques for data superposition on amplitude-modulated signals
… be imperceptible to listeners with ordinary radio receivers. The principles of a new modulation scheme, which permits an additional data channel to be superimposed on conventional DSB-AM signals without any bandwidth increase or envelope distortion, are described in this thesis. The proposed …
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A high speed image transmission system for ultra-wideband wireless links
… packets in MATLAB, and sends them to the UWB radio through an interfacing FPGA module. On the receiver side, the UWB receiver radio receivers the packets, decodes the bits, and passes them back to the receiver host PC through another interfacing FPGA module. The receiver host PC collects the …
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Detection, identification and localization of R/C electronic devices through their unintended emissions
… reliable detection of unintended emissions from radio receivers has a broad range of commercial and security applications. This thesis presents detection, identification, and localization methods for multiple RC electronic devices in a realistic environment. First, a Hurst parameter based …
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Synthesis, design, and fabrication techniques for reconfigurable microwave and millimeter-wave filters
… becomes increasingly ubiquitous, the need for radio receivers which can dynamically adjust to their operating environment grows more urgent. In order to realize reconfigurable receivers, tunable RF front-end components are needed. This dissertation focuses on the theory, design, and …
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Reconfigurable tunable microwave devices using liquid crystal.
… devices have extended widely, from AM radio receivers initially to newly developed GPS, smart mobile phones, radars, wireless LANs, satellite communications and implantable medical devices. The shortage in the available frequency spectrum for radio communications, the demand for …
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A game-theoretic approach to the security of emerging cognitive radio and small cell networks
… and multiple primary users (PUs) in cognitive radio networks. We analyze the interactions between the SUs and eavesdroppers using the framework of noncooperative game theory. Assuming that the SUs have full knowledge of the eavesdroppers, we propose a novel secure channel selection algorithm …
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Practical packet combining for use with cooperative and non-cooperative ARQ schemes in wireless sensor networks
… of fading and manufacturing variances in the radio receivers. Experiments are carried out to determine whether or not a spread-spectrum architecture has any effect on the size of this region, as has been suggested in previous work. It is shown that, for the particular setup tested, the …
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Eavesdropping risks of the DisplayPort video interface
… information processed by the device to nearby radio receivers. This problem, known as *compromising emanations* or *TEMPEST*, has been demonstrated for computer displays using analog video interfaces (VGA) and older digital interfaces (LVDS, HDMI, DVI). DisplayPort is a newer interface with a …
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High-Quality Detection in Heavy-Traffic Avionic Communication System Using Interference Cancellation Techniques
… effects. These techniques can be implemented in radio receivers to perform multi-signal decoding functionality to remove the required interferers (three overlapping signals) so that high-quality communication, as described in the first part, can be achieved. Various performance graphs are shown …
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Cognitive RF Front-end Control
… addresses the performance degradation in receivers due to poor selectivity. Poor selectivity is expected to be a primary limitation on the performance of Dynamic-Spectrum-Access (DSA) and millimeter wave (mmWave) technologies. Both DSA and mmWave are highly desired technologies because …
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Interaction of additive and quantization noises in digital PLLs
… controllable oscillator, they are widely used in radio receivers to retrieve the information content from remote signals. As such, they are capable of signal demodulation, phase and carrier recovery, frequency synthesis, and clock synchronization. Continuous-time PLLs are a mature area of study, …
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Highly Tunable Integrated Self-Interference Cancellation Techniques for Intelligent Full-duplex Radios
… by increasing spectral efficiency by enabling a radio's transmitter and receiver to operate simultaneously on the same channel frequency. This capability is particularly valuable for 5G/6G applications that require high data rates in congested wireless networks. However, a major challenge in FD …