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 60 for “"I/Q"”.
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I/Q imbalance mitigation for space-time block coded communication systems
Multiple-input multiple-output (MIMO) space-time block coded (STBC) wireless communication systems provide reliable data transmissions by exploiting the spatial diversity in fading channels. However, due to component imperfections, the in-phase/quadrature (I/Q) imbalance caused by the non-ideal …
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Utilizing I/Q data to enhance radar detection and accuracy metrics
The incorporation of advanced digital processing technologies including high-bandwidth networks, low-cost commercial components, and advanced FPGAs into novel radio frequency (RF) sensors has resulted in significantly increased sensor capabilities while at the same time dramatically increasing the …
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Joint compensation of I/Q impairments and PA nonlinearity in mobile broadband wireless transmitters
The main focus of this thesis is to develop and investigate a new possible solution for compensation of in-phase/quadrature-phase (I/Q) impairments and power amplifier (PA) nonlinearity in wireless transmitters using accurate, low complexity digital predistortion (DPD) technique. After analysing …
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The Analysis and Design of Phase-tunable Low-Power Low-Phase-Noise I/Q Signal Sources for Analog Phase Calibrated Transceivers
Due to the demand for low-cost, small-form factor and large-scale integration of system-on-chip wireless transceivers, the image-reject, zero-IF and low-IF receiver architectures have become the main topologies used in mainstream wireless communication systems. Consequently, signal sources with …
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A Comparative Study of the I. Q. and Grade Differences between Music Students and Other High School Students in the Okanogan Schools for 1958-1959
The primary purpose of this study was to determine whether or not there is any significant difference in academic achievement and intelligence quotient rating between two main groups of high school students: (1) those students enrolled in music classes and (2) those students not enrolled in music …
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Stress-induced alterations in ecosystem function: the role of acidification in lotic metabolism and biogeochemistry
I investigated how anthropogenic acidification influences stream metabolism and nitrogen (N) cycling by considering the stress response of microbial compartments responsible for these ecosystem processes. Microcosm incubations of leaf biofilms from streams of differing pH revealed greater rates of …
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Application of critical chain principles to improve microprocessor technology ramps
Across Intel's microprocessor production there exists high variability on new technology process tools meeting standard, installation and qualification (I/Q) schedule durations. To reduce project schedule variability and increase time to money, Intel has begun examining critical chain management …
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Nontraditional Positional Games: New methods and boards for playing Tic-Tac-Toe
In this dissertation we explore variations on Tic-Tac-Toe. We consider positional games played using a new type of move called a hop. A hop involves two parts: move and replace. In a hop the positions occupied by both players will change: one will move a piece to a new position and one will gain a …
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Nontraditional Positional Games: New methods and boards for playing Tic-Tac-Toe
In this dissertation we explore variations on Tic-Tac-Toe. We consider positional games played using a new type of move called a hop. A hop involves two parts: move and replace. In a hop the positions occupied by both players will change: one will move a piece to a new position and one will gain a …
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A comparative study of lower grade and higher grade pupils at a Jewish community school with regard to intelligence, self-concept and adjustment
A comparison of Lower Grade and Higher Grade pupils with regard to intelligence, self-concept and adjustment. 29 Lower and 29 Higher grade pupils in Stds 8 and 9 at a Jewish community day school were compared with regard to their I Q scores, self-concepts and adjustment level. These variables were …
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A 5-6 Ghz Silicon-Germanium Vco With Tunable Polyphase Outputs
In-phase and quadrature (I/Q) signal generation is often required in modern transceiver architectures, such as direct conversion or low-IF, either for vector modulation and demodulation, negative frequency recovery in direct conversion receivers, or image rejection. If imbalance between the I and Q …
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Time-Varying Frequency Selective IQ Imbalance Estimation and Compensation
Direct-Down Conversion (DDC) principle based transceiver architectures are of interest to meet the diverse needs of present and future wireless systems. DDC transceivers have a simple structure with fewer analog components and offer low-cost, flexible and multi-standard solutions. However, DDC …
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A Standalone High Frequency Receiver System
The High Frequency Receiver System (HFRS) is a mobile, autonomous, Linux-based RF recording system that is designed to pick up ionosonde sounding signals from 1—10 MHz. Systems are designed for quick deployment and capable of remaining deployed in the field for up to a month. The design motivation …
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Monte-Carlo Simulation of Diffusion as an Aid to Interpreting Quasi-elastic Neutron Scattering from Lattice Gas Systems with Diffusion on Multiple Time-Scales
Pd and Pd-Ag have recently found application in hydrogen processing technologies, both in terms of purification membranes and isotope-separation systems. Direct measurement of the diffusion processes in these systems is provided by quasi-elastic neutron scattering (QENS); the timescales that can be …
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Use of the Audio Visual Tactile Treatment on Disabled Readers in Grades Three and Four : Its Effect on Word Recognition, Silent Reading Comprehension, and Attitude Towards Reading
<p>Purpose The purpose of this study was to investigate the effects of the Audio Visual Tactile (AVT) treatment in third - and fourth-grade disabled readers in three areas of reading: word-recognition skills , silent-reading comprehension skills , and attitude towards reading. Procedures A …
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Wide common mode input operational amplifier with serially programmable output offset
Operational amplifiers continue to develop to meet modern demands on performance. This document describes an operational amplifier designed for a highly specific telecommunications application - to serve as the buffer between an I/Q demodulator and Gm-C filter. Requirements set forth by this …
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Improving the Resolution and Sensitivity of Microwave Astronomical Observations
Millimetre and microwave astronomy has been an ever-expanding field over the past decades with an improvement in computational power, semi-conductors, super-conductors and read-out electronics. This has led to more powerful and sensitive instruments as well as higher resolutions for both …
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Attitudes toward parents and teachers and general adjustment of high school seniors in relation to school progress and acceptance among associates
The objective of this study was to determine the association between the student’s general adjustment and his attitudes towards his parents and teachers and his school progress and the degree to which he was accepted by associates in social situations. Seventy high school senior girls and boys …
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Ultrasound Microscope with Arbitrary Coded Broadband High Frequency Signal
Coded signals are widely used in ultrasound microscopy and they can improve signal to noise ratio and imaging quality. However, so far all reported solutions has limited bandwidth under 135 MHz. We present a solution for ultrasonic microscopy that is capable of dealing with coded GHz signals. The …
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Homology, cohomology and extensions of ordered groupoids
This thesis contains contributions to the homology, cohomology and extensions of ordered groupoids. We study the simplicial homology of ordered groupoids. We also discuss the (co)homology of the set of identities of ordered groupoids and relate the cohomology of the set of identities of an ordered …
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