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 14 of 14 for “"Impulse Radio"”.
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MAC and Physical Layer Design for Ultra-Wideband Communications
… contenders for the technology. One is based on Impulse Radio techniques extended to direct sequence spread spectrum. The other technique is based on Orthogonal Frequency Division Multiplexing. Both schemes are analyzed in this thesis and modifications are proposed to increase the performance of …
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A Novel Highly Accurate Wireless Wearable Human Locomotion Tracking and Gait Analysis System via UWB Radios
… in dense multi-path environments. Moreover, impulse-radio UWB (IR-UWB) is suitable for low-power and low-cost implementation, which makes it an attractive candidate for wearable, low-cost, and battery-powered health monitoring systems. The goal of this research is to propose and investigate a …
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Multi-sensor signal processing methods for home monitoring of cardiovascular and respiratory diseases
… over-night data from an under-the-mattress impulse radio ultra-wide band (IR-UWB) radar combined with the signals from a microphone sensor were analyzed using machine learning algorithms to detect sleep apnea, a sleep related respiratory disorder caused by involuntary cessation of breathing …
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Ultrawideband IEEE802.15.4a Cognitive Localization Methods for the 5G Environment
… of cellular network localization methods. An impulse radio (IR)-UWB device-to-device (D2D) WWAN is further proposed with channel time partitioned into discrete micro-channel slots (DMCS) along with a cluster formation scheme that achieves above 350Mbps network throughput in comparison with …
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A Novel Intrabody Communication Transceiver for Biomedical Applications
… communication. A carrier-free scheme based on impulse radio (IR) for the IBC (IR-IBC) is implemented on a FPGA. Results demonstrate data rates of up to 1.56 Mbps achievable for the galvanic coupling IBC method.
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Betrachtungen zur Energieeffizienz in Funknetzwerken mit geringer Datenrate
… (UWB) using short pulses (Impulse Radio-IR) is currently developing. The potential of this technology is a very simple power-efficient transmitter. Moreover, due to the short pulses, transmission time is short. These two facts promise an energy efficient operation in …
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Spectrum shaping and its application: spread-spectrum clock generator and circuits for ultra wide band
… which proposes the use of large sections of the radio spectrum at low amplitudes to transmit high-bandwidth digital data. In part II of the dissertation, two UWB applications are presented, both dealing with the advantages as well as with the challenges of a wide-band system, namely: a …
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Synchronization in Impulse Based Ultra Wideband Systems
In Impulse Radio based Ultra Wide Band (UWB) systems, where sub-nano second pulses are used, synchronization is very challenging because of their short pulse duration and very low duty cycle. Coherent detection of ultra wide-band signals requires complex channel estimation algorithms. In impulse …
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Systems for pervasive electronics and interfaces
… networks using ultra-low-power Ultra-Wideband Impulse Radio (UWB-IR) transceivers, and implement energy harvesting adaptive networking protocols. The current testbed enables the evaluation of different algorithms by exposing individual prototypes to repeatable light conditions based on …
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Channel-coded time-hopping and direct-sequence ultrawideband systems
… concatenated UWB TH Spread-Spectrum (SS) Impulse Radio (IR) system. We then progressed from the two-stage design philosophy to three-stage irregular concatenated UWB systems. Naturally, an improved performance is only achievable at the cost of an increased complexity and interleaver …
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Characterization of Ultra Wideband Communication Channels
… detection to improve the performance of impulse radio systems. Measured dispersion parameters and their effects on the multiple access parameters are discussed.
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Ultra-Wideband Transceiver Design And Optimization
… ulta wideband (UWB) standard for designing a radio to operate in the a wireless sensor network in the BAN. The specific application targeted is a hearing aid. However, the design in this work is capable of working in a low power low range application with the ability to have multiple data …
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Transceiver Design for Ultra-Wideband Communications
… thesis is specifically focused on a software radio transceiver design for impulse-based UWB with the ability to transmit a raw data rate of 100 Mbps yet encompasses the adaptability of a reconfigurable digital receiver. A 500 ps wide Gaussian pulse is generated at the transmitter utilizing the …
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On the Development of a Very Fast Simulator for TH-UWB Systems = Sobre el Desarrollo de un Simulador Rápido para los Sistemas TH-UWB
Impulse Radio-Time Hopping-Ultra Wideband (IR-TH-UWB) is a relatively new technology that might have a big effect on improving wireless communication. Multipath resistance, low power, high capacity, coexistence with other systems, ability of penetrating walls are some of the characteristics that …