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Electrical and Computer Engineering

University of Texas at Tyler

Theses/Dissertations

2011

Articles 1 - 8 of 8

Full-Text Articles in Engineering

Compressive Sensing For Speech Signals In Mobile Systems, Sabir Ahmed Dec 2011

Compressive Sensing For Speech Signals In Mobile Systems, Sabir Ahmed

Electrical Engineering Theses

Compressive sensing is an emerging and revolutionary technology that strongly relies on the sparsity of the signal. In compressive sensing the signal is sparsely compressively sampled by taking a small number of random projections of the signal, which contain most of the salient information. Compressive sensing has been previously applied in areas like: image processing, radar systems and sonar systems. This research work will discuss the potential implementation of compressive sensing in mobile communication systems and how it will influence their data rates. In a typical mobile communication system, the signal of interest is sampled at least at the Nyquist …

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Using A Micro-Integrator To Eliminate The Numerical Butterfly Effect In Non-Linear Chaotic Partial Differential Equations, Joshua Jemegbe Dec 2011

Using A Micro-Integrator To Eliminate The Numerical Butterfly Effect In Non-Linear Chaotic Partial Differential Equations, Joshua Jemegbe

Electrical Engineering Theses

Chaos theory is a relatively new scientific paradigm for the analysis, simulation and prediction of non-linear phenomena whose initial conditions determine the behavior of their entire time series representation. It finds many applications in mathematics, science, and engineering. These include, but are not limited, to data encryption and decryption, designing secure communication systems, predicting weather patterns, noise fluctuations on data lines, understanding turbulence in fluid flow, and analyzing quantum wells. Systems that exhibit chaos are called chaotic systems. In computing solutions to nonlinear chaotic partial differential equation sets, slight deviations in step size could lead to completely diverging trajectories as …

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An Evaluation Of Cmos Adders For Robustness And Fault Detectability In Nanoscale Technologies, Sowjanya Puttagunta Nov 2011

An Evaluation Of Cmos Adders For Robustness And Fault Detectability In Nanoscale Technologies, Sowjanya Puttagunta

Electrical Engineering Theses

The objective of this thesis is to implement the two low transistor count full adders using submicron CMOS technologies and to study their performance with respect to process variations and single-transistor faults. One adder uses 10 transistors and the other uses 14 transistors. Hence they are respectively called the 10T and 14T adders. Previous work has studied the implementation of the static Complementary Metal Oxide Semiconductor (CMOS) adder, Complementary Pass Transistor Logic (CPL) adder, Transmission Gate adder (TGA) and the Hybrid CMOS (HCMOS) adder. The performance of the 10T and 14 T adders using the above mentioned metrics are compared …

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Applications With A Radiation Pattern In The Horizontal Direction, Sudarshan Reddy Tippi Reddy Nov 2011

Applications With A Radiation Pattern In The Horizontal Direction, Sudarshan Reddy Tippi Reddy

Electrical Engineering Theses

Antennas play a vital role in communication systems by radiating and receiving signals of interest. There are various structural types of antennas differentiated by their individual properties such as: the directivity, the power transmitted and the gain. One of these types of antennas with special properties is the microstrip antenna. There are multiple applications for microstrip antennas in wireless communication, due to its small form factor and geometrical shape. A design for a microstrip antenna in which the radiation is spread along the horizontal axis is proposed. Several antenna configurations were considered for the design, and their radiation patterns were …

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Design Of A Uniform Circular Phased-Array Smart Antenna For 2.4 Ghz Applications, Hemasri Kollipara Aug 2011

Design Of A Uniform Circular Phased-Array Smart Antenna For 2.4 Ghz Applications, Hemasri Kollipara

Electrical Engineering Theses

An antenna is a transitional structure between free-space and a guiding device. Different types of antennas have different properties in terms of its radiation characteristics, directivity and gain. One of the antennas, which play an important role in advanced wireless communication systems, is the smart antenna. One of the most remarkable properties of a smart antenna is that it is capable of directing its main beam towards the direction of the individual user and the nulls in the direction of interfering signals. There are different configurations for smart antennas. One of these configurations is the Uniform Circular Array Antenna (UCA). …

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A Study Of Multiprocessor Systems Using The Picoblaze 8-Bit Microcontroller Implemented On Field Programmable Gate Arrays, Venkata Mandala Aug 2011

A Study Of Multiprocessor Systems Using The Picoblaze 8-Bit Microcontroller Implemented On Field Programmable Gate Arrays, Venkata Mandala

Electrical Engineering Theses

As Field Programmable Gate Arrays (FPGAs) are becoming more capable of implementing complex logic circuits, designers are increasingly choosing them over traditional microprocessor-based systems for implementing digital controllers and digital signal processing applications. Indeed, as FPGAs are being built using state-of-the-art deep submicron CMOS processes, the increased amount of logic and memory resources allows such FPGA-based implementations to compete in terms of speed, complexity, and power dissipation with most custom-built chips, but at a fraction of the development costs. The modern FPGA is now capable of implementing multiple instances of configurable processors that are completely specified by a high-level descriptor …

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Implementation Of A Full Doppler Compensation To Eliminate The Use Of First Order Approximation To Compensate The Doppler In Large Time-Bandwith Product Radar Images, Pavan Vutukur Aug 2011

Implementation Of A Full Doppler Compensation To Eliminate The Use Of First Order Approximation To Compensate The Doppler In Large Time-Bandwith Product Radar Images, Pavan Vutukur

Electrical Engineering Theses

The First Order Approximation technique is used in current generation of radars to compensate for the frequency shift due to the target's velocity. A common practice in radar systems to improve their resolution and performance is to increment the Time-Bandwidth (TBW) product of the transmitted signal. As the first order approximation is comprised of only the first two terms of a power series expansion; any significant increase in the TBW product of the signal results in significant errors in the radar image. In this research, the full Doppler compensation methodology was implemented and compared to the common approximation. The Time-Bandwidth …

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The Measurement Of Bone Quality In Medical Images Using Statistical Textural Features, Ning Huang May 2011

The Measurement Of Bone Quality In Medical Images Using Statistical Textural Features, Ning Huang

Electrical Engineering Theses

Mineral density and bone architecture properties are the main measures of bone quality. Dual-energy X-ray Absorptiometry (DXA) is the traditional clinical measurement technique for bone mineral density, but it is insensitive to architectural information. Image analysis of the architectural properties of bones can be used to predict bone quality. This study is aimed at investigating the statistical parameters extracted from wo dimensional projection images of the DXA scans and exploring its link with architectural properties, and its correlation with a bones mechanical properties. In this research, features extracted from the Gray Level Co-occurrence Matrix (GLCM) for a 2D image are …

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