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 111 for “"Ultra-wideband (UWB)"”.
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An enhanced pulse position modulation (PPM) in ultra-wideband (UWB) systems
1 PDF file (ix, 60 pages)
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Investigation into the design of ultra-wideband (UWB) and multi-band antennas
… extraordinary demands on spectrums for which ultra-wideband (UWB) and multi-band, e.g.: dual-band, techniques are useful. These UWB and multi-band services require UWB and multi-band antenna designs. Motivated by these applications, we first carried out the investigations on the family of …
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Enhancing the energy efficiency of ultra wideband (UWB) based media access control (MAC) protocols in mobile ad-hoc networks (MANETs) through the use of steerable directional antenna
… antennas access the wireless medium specific to Ultra-WideBand (UWB) systems have not gained wide attention. The aim of this research is to design, implement and test an improved Medium Access Control (MAC) protocol for UWB systems in order to minimise energy consumption in MANET’s through the …
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A platform for ultra wideband communication systems
… for sending and receiving data across an actual UWB channel was designed. In addition, a platform for Ultra Wideband (UWB) communication development was implemented. The UWB communication platform is implemented to provide a unique testing tool for both transmission and reception of UWB signals. …
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A micropower ultra-wideband RADAR profiling system
Ultra-wideband (UWB) technology can be used in many applications, including radar, communications, and geo-location. In this dissertation, UWB technology is utilized to directly generate sub-nanosecond pulses with more than 1 GHz bandwidth to implement radio detection and ranging (RADAR) for …
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Ultra-wideband radar for robust inspection drone in underground coal mines
… face. The objective of this paper is to present ultra-wideband (UWB) radar as a robust sensing solution to this challenging environment and validate its performance in the typical coal mine environment, both statically and dynamically.
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A reconfigurable high speed analog to digital converter architecture for ultra wideband devices
… high speed low power data communication, Ultra Wideband (UWB) medium has the potential to revolutionise wireless data transmission and reception. A core component of any communications device is its ability to convert real time analog signals to discrete values for fast and efficient …
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Design of a synchronization subsystem for an ultra wideband radio
Ultra Wideband (UWB) systems are receiving recently more attention due to its approval by FCC. The systems that have been already implemented are based in analog correlation. This thesis is part of an effort to implement a wholly digital Ultra Wideband receiver. Synchronization of a signal is a …
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An energy efficient sub-threshold baseband processor architecture for pulsed ultra-wideband communications
Ultra-wideband (UWB) communications is currently being explored as a medium for high-data-rate last-meter wireless links. Accordingly, there has been much interest in integrating UWB radios onto battery-operated devices, creating a strong demand for energy efficient UWB systems. The objective of …
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An FPGA Software-Defined Ultra Wideband Transceiver
Increasing interest in ultra-wideband (UWB) communications has engendered the need for a test bed for UWB systems. An FPGA-based software-defined radio provides both post-fabrication definition of the radio and ample parallel processing power. This thesis presents the FPGA design for a …
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Using an Agilent E5071B Vector Network Analyzer and Rotating Platform
Ultra-Wideband (UWB) technology has become very famous amongst the radar imaging community. This system is well suited for tomographic imaging as it offers high special resolution and a low probability of detection. Some of the UWB applications include ground penetrating radar, medical imaging and …
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Robust range-based localization and motion planning under uncertainty using ultra-wideband radio
… accurately localizing a mobile robot using ultra-wideband (UWB) radio signals in GPS-denied environments; and planning robot trajectories that incorporate belief uncertainty using probabilistic state estimates. Addressing the former, we improve upon traditional approaches to range-based …
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Design of an Ultra-Wideband Frequency-Modulated Continuous Wave Short Range Radar System for Extending Independent Living
… short range radar (SRR) system, which uses ultra-wideband (UWB) signals can provide immediate assistance by monitoring and detecting fall events. The unique characteristics of this system allow for a frequency-based modulation system to carry out triangulation and sense the location of the …
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Improving Ultra-Wideband Localization by Detecting Radio Misclassification
… Fortunately, recent developments in ultra-wideband (UWB) radio technology have enabled precise positioning in places where it was not previously possible by utilizing multipath-resistant wide band pulses.</p> <p>Although ultra-wideband signals are less prone to multipath interference, …
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Design of an Ultra-Wideband Spiral Antenna for Ground-Penetrating Microwave Impulse Radar Applications
… of transmitting sub-nanosecond pulses over ultra-wideband (UWB) frequency ranges. This thesis investigates the suitability of a novel MIR antenna for high-accuracy ground-penetrating radar (GPR) applications. Key GPR antenna considerations are pulse dispersion, size, and cost. UWB horn …
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A Frequency-Modulated Continuous Wave-Based Boundary Detection System for Determination of Monitoring Region for an Indoor Ultra-Wideband Short Range Radar-Based Eldercare Monitoring System
… detection of fall events. The application of ultra-wideband (UWB) signals for a monitoring system was chosen due to its unique characteristics such as wide spectrum, immunity to interference, penetrability, and application for the detection of people. Part of this monitoring system is boundary …
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Localization for teams of autonomous ground vehicles
… for a fleet of autonomous ground robots using ultra-wideband (UWB) beacons in concert with the robots’ on-board IMUs and encoders. The error observed from the uncorrected UWB ranges was quantified for line-of-sight conditions, and a calibration procedure was developed and applied for UWB range …
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Antenna design for ultra wideband radio
… the Federal Communications Commission (FCC) for Ultra Wideband (UWB) radio applications has presented a myriad of exciting opportunities and challenges for design in the communications arena, including antenna design. Ultra Wideband Radio requires operating bandwidths up to greater than 100% of …
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Ultra-Wideband Error Modeling for Improved Localization
Ultra-wideband (UWB) is a modern range measurement technology which can provide high-speed, low-cost ranging, however UWB measurements can be difficult to model. In an effort to increase accuracy of localization using UWB, this thesis develops models to better understand the complex error patterns …
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Energy-efficient analog-to-digital conversion for ultra-wideband radio
… of an analog-to-digital converter (ADC) for ultra-wideband (UWB) radio. UWB is an emerging technology capable of high-data-rate wireless communication and precise locationing, and it requires high-speed (>500MS/s), low-resolution ADCs. The successive approximation register (SAR) topology …
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