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 40 for “"Wireless transmission"”.
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Signal conditioning for high efficiency : wireless transmission
… LTE-advanced 100Mbps (mobile) and 1Gbps (fixed) wireless transmission target rate. The next generation of wireless basestations will also need to be powered from renewable sources, particularly in developing countries. A new generation of components, circuits, algorithms and transmission …
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Wireless transmission with energy harvesting and storage
… online power control strategies are proposed for wireless communication systems equipped with energy harvesting devices and finite-capacity batteries. The methods are proposed for the unbounded fading environment. Due to the time-dependent and random behavior of the energy arrival and fading, this …
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Wireless transmission of power for sensors in context aware spaces
In the present thesis I create and use wireless power as an alternative to replace wiring and batteries in certain new scenarios and environments. Two specific scenarios will be highlighted and discussed that motivated this research: The Interactive Electromechanical Necklace and the …
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An optical telemetry system for wireless transmission of biomedical signals across the skin
… systems was developed that permits in-vivo transmission of biomedical signals across the skin. By complete implantation of sensors and instrumentation electronics, problems with percutaneous connectors were eliminated. Optical power and signal transmission was accomplished with smaller and …
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From cognitive to docitive radios: the role of machine learning in intelligent wireless multimedia networks
In recent years, multimedia wireless transmissions have become a rapidly growing field and have received increasing attentions. Enabling multimedia communications over wireless networks to reach their full potential is a challenging task, due to the complex and time-varying features of wireless …
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Performance analysis of H.264 encoder for high-definition video transmission over ultra-wideband communication link.
… amusement devices. Moreover, the demand for wireless transmission of HD video is rising increasingly for its ubiquitous nature, easy installation and relocation. The high bandwidth requirement is the main concern for wireless transmission of high quality video streams. Research has been going …
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Scheduling algorithms for throughput maximization in time-varying networks with reconfiguration delays
We consider the control of possibly time-varying wireless networks under reconfiguration delays. Reconfiguration delay is the time it takes to switch network resources from one subset of nodes to another and it is a widespread phenomenon observed in many practical systems. Optimal control of …
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Design and manufacturing analysis of resonantly coupled circuits and other components used for applied wireless power transmission : application analysis
… coupled circuit used to receive and transmit wireless energy. Ultimately, the wireless energy is used to generate heat, which in turn causes a polymeric material to expand, thereby creating a mechanical force to disengage the locking mechanism. The analysis considers the force generated …
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Secure OFDM System Design for Wireless Communications
Wireless communications is widely employed in modern society and plays an increasingly important role in people's daily life. The broadcast nature of radio propagation, however, causes wireless communications particularly vulnerable to malicious attacks, and leads to critical challenges in securing …
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Design of Power Amplifier Test Signals with a User-Defined Multisine
Cellular radio communication involves wireless transmission and reception of signals at radio frequencies (RF). Base stations house equipment critical to the transmission and reception of signals. Power amplifier (PA) is a crucial element in base station assembly. PAs are expensive, take up space …
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Wireless power transmission utilizing a phased array of Tesla coils
… how they can be linked in a phased array for the wireless transmission of electrical power. A detailed derivation of their operational theory is presented with a strong emphasis on the current and voltage waveforms produced. Formulas are presented relating the features of the waveforms to specific …
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Functional near-infrared spectroscopy for Hb and HbO₂ detection using remote sensing
… work presented in this thesis is to develop a wireless, near-infrared (NIR) imaging system to provide flexibility and functionality to clinicians and researchers who require monitoring of blood profusion to tissue, muscles, or the brain. The prototype device uses a single stimulus/detection …
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Single-carrier frequency domain equalization using subband decomposition for optical wireless communications
Optical wireless communication is intended to be applied into indoor and visual distance high-rate data transmission, which is complementary to radio frequency communications. There are specific problems and requirements in optical wireless communications compared with radio frequency …
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Design of a wireless ureteropyeloscope
… were transmitted to a monitor for viewing via a wireless transmission module. The ureteropyeloscope discussed in the study was aimed at increasing the durability of the deflection unit of the ureteropyeloscope, with primary component made of nitinol, and reducing the number of cables around the …
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A non-coherent ultra-wideband receiver : algorithms and digital implementation
… (UWB) communication is an emerging technique for wireless transmission in the 3.1-10.6 GHz unlicensed band with signal bandwidths of 500 MHz or greater. A non-coherent receiver based on energy collection reduces complexity, cost, and power consumption at the cost of channel spectral efficiency. …
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Stabilization and Control of a Quad-Rotor Micro-UAV Using Vision Sensors
… tracking without the aid of a ground station or wireless transmission. Using this on-board feature tracking system a drift stabilization control system has been developed that allows indoor flight of the Helio-copter without tethers. The Helio-copter uses an IMU to maintain level attitude while …
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Wireless Throughput and Energy Efficiency under QoS Constraints
… of the main driving forces behind this growth, wireless transmission of multimedia content has significantly increased in volume and is expected to be the dominant traffic in data communications. Such wireless multimedia traffic requires certain quality-of-service (QoS) guarantees.</p> <p>With …
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Optimal nonlinear digital signal processing : a dynamical systems approach
… aimed to improve power efficiency of modern wireless transmission systems. The first part of this thesis is motivated by peak-to-average power ratio reduction of communication signals. The problem is formulated as minimization of a frequency-weighted convex quadratic cost subject to …
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A high speed image transmission system for ultra-wideband wireless links
… that offers short range, high data rate wireless transmission, with low power consumption and low consumer cost. Operating in the 3.1 GHz - 10.6 GHz frequency band with bandwidth above 500 MHz, it is an overlay technology that can co-exist with other narrowband services in the same …
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Introducing statistical and machine learning-based methods of enhancing the resiliency and security of electrical-based critical infrastructure
… of the resiliency of high-voltage electrical transmission, the continuous, 24-hour collection of transmission line activity generates data that exceeds the ability to store for long-term forensics. For the secure transmission of information, the information must be (i) hard to recover by an …
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