Open Access. Powered by Scholars. Published by Universities.®
Electrical and Computer Engineering Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- HEVC (10)
- UAV (4)
- Neural networks (3)
- Classifiers (2)
- Controls (2)
-
- PH (2)
- Switched capacitor (2)
- UGV (2)
- 360-degree video coding (1)
- ACC (1)
- AVC (1)
- Activation Functions (1)
- Adaptive (1)
- Adaptive activation functions (1)
- Adaptive offset filters (1)
- AirSim (1)
- American Sign Language (1)
- Antenna (1)
- Antenna array (1)
- Automated irrigation (1)
- Autonomous systems (1)
- Avalanche breakdown (1)
- Avalanche diodes (1)
- Battery management systems (1)
- Bicycle and pedestrian conflict data (1)
- Bilateral filter (1)
- Bit rate reduction (1)
- Bit-rate (1)
- Bitrate allocation (1)
- Burn-in (1)
- Publication Year
- File Type
Articles 211 - 240 of 336
Full-Text Articles in Electrical and Computer Engineering
Alternative Matching Schemes For Automatic Fingerprint Identification Systems, Michael Jason Futer
Alternative Matching Schemes For Automatic Fingerprint Identification Systems, Michael Jason Futer
Electrical Engineering Theses - Archive
Biometrics is a recognition technology that uses the unique behavioral and physiological traits of the human body as identifiers. The fingerprint is one of the oldest and most widely used forms of biometric identifiers. In this thesis, an automatic fingerprint identification system designed by a previous Electrical Engineering graduate student at The University of Texas at Arlington is upgraded with the purpose of improving matching accuracy. A review of the baseline automatic fingerprint identification system is provided as a reference point for improvements in the system. Then, improvements to the image enhancement stage of the baseline system are discussed. They …
Modeling And Characterization Of Rf Mems Resonators, Najla S. Khan
Modeling And Characterization Of Rf Mems Resonators, Najla S. Khan
Electrical Engineering Theses - Archive
Over the past decade, a multitude of micro-electro-mechanical (MEMS) devices have been developed and commercialized due to their low power consumption, reduced cost and compact size. In recent years, significant advancements in technology have extended MEMS development towards radio frequency, microwave and millimeter wave applications. The need for micro-machining and MEMS based systems for RF and microwave applications arises from the inherent limitations of existing RF devices. Motivation for incorporating MEMS based fabrication technologies into microwave and millimeter wave systems can be classified into three main categories: precision, system integration and performance. As frequency increases, the size of RF components …
Preparation Of Pyramidal Zinc Oxide Particle As An Antireflective Coating For Application In Solar Cell., Amit Banik
Preparation Of Pyramidal Zinc Oxide Particle As An Antireflective Coating For Application In Solar Cell., Amit Banik
Electrical Engineering Theses - Archive
There is a lot of research going on in the field of solar cell to increase the energy conversion efficiency. Many new methods have been implemented and new processes and materials have been suggested in the recent past. This research deals with the preparation of pyramidal structure zinc oxide particles as an antireflective coating for polycrystalline and non-silicon solar cell. The process involved a cost effective method that is electrochemical deposition of zinc oxide on silicon mold. The mold, inverted pyramid, is prepared by photolithographic process PECVD silicon nitride as the hard mask and wet etching and then electrochemical deposition …
Design Of Microwave Non-Redundant Band-Pass Filter Using Microstrip And Edge Coupled Sections, Vinoj Vijayan Pillai
Design Of Microwave Non-Redundant Band-Pass Filter Using Microstrip And Edge Coupled Sections, Vinoj Vijayan Pillai
Electrical Engineering Theses - Archive
Microwave filler design using the non-redundant method relies on using the quarter wave Unit Elements (U.E's) to create a complex pole and hence augment the filter skirt response as against the redundant method wherein the U.E's do not contribute towards the filtering action. Filters realized using this method may have series high impedance capacitors, which are not realizable in planar microstrip technology. This thesis proposes a method to integrate microstrip transmission line and coupled line elements to circumvent the problem of realizing series capacitance. The total number of transmission line elements required to realize the filter is the minimum number …
Performance Analysis Of Space - Time Block Coded Multiple Antenna Systems, Varsha Rao Bolar
Performance Analysis Of Space - Time Block Coded Multiple Antenna Systems, Varsha Rao Bolar
Electrical Engineering Theses - Archive
Multiple input and multiple output(MIMO) communications are seen as key technology to achieve high data rates for next generation of air interfaces like Wifi, WiMAX, and 3GPP-LTE, because of the spatial dimension complementing time (TDM), frequency (FDM), and code (CDM) multiple access technologies. MIMO technology has many captivating characteristics such as, it offers significant increases in data throughput and link range without additional bandwidth or transmit power. It achieves this by higher spectral efficiency (more bits per second per hertz of bandwidth) and diversity (reduced fading). Because of these properties, MIMO is a current theme of international wireless research. Diversity …
A Portable Biotelemeter For Batteryless Gerd Sensors, Sandeep Battula
A Portable Biotelemeter For Batteryless Gerd Sensors, Sandeep Battula
Electrical Engineering Theses - Archive
In many medical problems, a continuous monitoring of the disease in vivo is essential to prevent further deterioration of health. The monitoring usually exceeds 24 hours. With the help of current advanced technologies, micro-medical devices are built to sense the internal physiological conditions in patients. Telemetry is used to transmit information to an external monitoring device. For the convenience and comfort of the patient, these monitoring systems should have low power consumption and be portable. This work discusses the design of a low power portable biotelemeter for batteryless Gastro esophageal reflux disease (GERD) sensors which can detect acid and non-acid …
Analysis And Modeling Of Self Heating In Silicon Germanium Heterojunction Bipolar Transistors, Kevin Bastin
Analysis And Modeling Of Self Heating In Silicon Germanium Heterojunction Bipolar Transistors, Kevin Bastin
Electrical Engineering Theses - Archive
Silicon Germanium (SiGe) hetero junction bipolar transistors (HBTs) have established itself as strong technology contender for a host of circuit applications including analog, mixed signal and Radio Frequency (RF). Due to the effect of technology scaling, self heating plays a significant role in the performance of SiGe HBTs. This thesis paper does an extensive analysis on the effect of self heating and uses different methods to extract the self heating parameters. An expression for thermal resistance considering thermal conductivity as a function of temperature is derived. Also a method to convert a multi pole thermal model to a single pole …
Preliminary Investigation Of Six Degree Of Freedom Human Steadiness Measurement Using A Performance Theory Framework, Jonathan Daniel Armstrong
Preliminary Investigation Of Six Degree Of Freedom Human Steadiness Measurement Using A Performance Theory Framework, Jonathan Daniel Armstrong
Electrical Engineering Theses - Archive
Tremor is an undesired oscillatory movement of a body segment which limits a person's ability to accomplish tasks. A conceptually sound, single number measure reflecting steadiness (defined as the inverse of tremor) of body segment is desired. Technology has advanced to make six degree of freedom (DOF) characterization of motion feasible, but the challenge remains regarding how to process time series data from multiple DOFs to achieve the single number composite measure. Previous conceptual work has applied General Systems Performance Theory (GSPT) to this problem. This thesis reports the investigation of steadiness composite measure formation. Three composite formation candidates were …
Analysis Of The Spatial Correlation Measurements For The Multiple Input Multiple Output (Mimo) Channel Using Anechoic Chamber Measurement Methodologies To Evaluate Over-The-Air (Ota) Testing Techniques, Digvijay Arjunrao Jadhav
Analysis Of The Spatial Correlation Measurements For The Multiple Input Multiple Output (Mimo) Channel Using Anechoic Chamber Measurement Methodologies To Evaluate Over-The-Air (Ota) Testing Techniques, Digvijay Arjunrao Jadhav
Electrical Engineering Theses - Archive
There are numerous constraints in defining an Over-The-Air (OTA) test due to the practical hardware restrictions present in an anechoic chamber. It is necessary to evaluate the test signals used in OTA testing to verify that the real world multipath propagation can be recreated for OTA testing inside an anechoic chamber. The objective of this measurement is to check whether the parameter, `Spatial Correlation' can be used to compare OTA test signals used in the MIMO OTA testing. Spatial Correlation has prime importance from the point of view of MIMO channel modeling. It's a key factor in determining the MIMO …
Error Concealment Techniques In H.264/Avc For Video Transmission Over Wireless Networks, Vineeth Shetty Kolkeri
Error Concealment Techniques In H.264/Avc For Video Transmission Over Wireless Networks, Vineeth Shetty Kolkeri
Electrical Engineering Theses - Archive
Several error concealment methods are applied to H.264/AVC (Advanced Video Coding) baseline profile such that the decoded video is error free. The error concealment techniques are implemented both in the spatial and temporal domains. The original and error concealment video sequences are compared in terms of MSE (Mean Square Error), PSNR (Peak-to-peak Signal to Noise Ratio) and SSIM (Structural Similarity Index Metric). This comparision has demonstrated that the error concealment methods are very effective in improving the visual quality. Implementation complexity also has been considered as the video transmission in baseline profile is meant for wireless networks.
An Efficient Piecewise Linear Network, Rohit Rawat
An Efficient Piecewise Linear Network, Rohit Rawat
Electrical Engineering Theses - Archive
A Piecewise Linear Network (PLN) is a local network that offers the accuracy of higher order networks and the Multi Layer Perceptron (MLP), with the computational simplicity of linear networks. A method to design a PLN is demonstrated and several clustering algorithms, used in the design procedure, are compared. The performance of the Self Organizing Map (SOM) clustering algorithm has been found to be slightly better than the other clustering methods. Methods to determine the appropriate threshold in the Sequential Leader algorithm have been studied. A binary search based approach was found to be the most efficient in terms of …
A Frequency Domain Approach For Time-Reversal Of Microwave Impulses, Shaoshu Sha
A Frequency Domain Approach For Time-Reversal Of Microwave Impulses, Shaoshu Sha
Electrical Engineering Theses - Archive
In this thesis, a compact and low-cost electronic circuit system is designed for time-reversal of microwave impulses with nanosecond and sub-nanosecond temporal durations. A frequency domain approach is adopted in order to avoid high sampling rate in time. The proposed system obtains the discrete spectra of input impulses first, then realizes time-reversal in frequency domain, and finally synthesizes the time-reversed impulses using discrete continuous wave elements. It is composed of commercially available circuits including oscillators, mixers/multipliers, band-pass-filters, amplifiers, and switches, hence embodies low-cost system-on-chip implementation. The proposed time-reversal circuit's performance is verified by Advanced Design System (ADS) simulations, with most …
Utilizing Physical Layer Information To Improve Rfid Tag Identification, Rushikesh Shree Khasgiwale
Utilizing Physical Layer Information To Improve Rfid Tag Identification, Rushikesh Shree Khasgiwale
Electrical Engineering Theses - Archive
Radio-frequency identification (RFID) systems are designed for fast and accurate identification of multiple RFID tags. Their performance depends on the effective detection andresolution of communication collisions caused by the presence of multiple tags in the reader's field. Present RFID protocols do not rely upon the received physical waveform obtainedduring a collision for either collision resolution or improved identification rate. This signal contains important information that is often ignored or otherwise discarded.In this thesis I analyze the physical layer information extracted from a collision waveform from the ISO-18000-6C protocol and identifypotentially performance enhancing information contained therein. Utilization of this information to …
Athena - Rfid Tag Metrics, Amit Jain
Athena - Rfid Tag Metrics, Amit Jain
Electrical Engineering Theses - Archive
In this thesis we have developed a Metric which is a numerical value representing the readability and performance characteristic of an RFID tagged object. The metric value ranges from 0 -100 and is given a unit of Athena, where a higher number specifies a better performing tag. The major parameters on which the metric value depends are frequency at which RFID system is working, transmitted power by the reader, and the received signal strength from the tag. All the parameters used for the Metric evaluation are well within the FCC regulations for passive UHF RFID system. Choosing the best performing …
Localization System For Uav/Ugv In Urban Environments, Vishal Savio Coelho
Localization System For Uav/Ugv In Urban Environments, Vishal Savio Coelho
Electrical Engineering Theses - Archive
An implementation of relative localization of wireless sensor nodes using a potential field method is presented in this work. The system is designed to assist in UAV/UGV navigation in urban environments like rooms and passageways of buildings. An unmanned vehicle will need to rely on ground-based sensors to help it navigate indoors, as GPS signals are severely attenuated and reception is intermittent.A sufficient number of sensors are first deployed throughout the terrain in a random fashion. They must then localize themselves to the environment, i.e. they must develop an internal frame of reference or co-ordinate system. A potential field method …
Optimization Of Hydrogen Filling Station, Weiping Xiao
Optimization Of Hydrogen Filling Station, Weiping Xiao
Electrical Engineering Theses - Archive
Due to the price hike of the fossil fuel and the concern of the global warming, the hydrogen economy can be envisioned to address those problems. After the Energy Bill was announced in 2005, a transition of national energy system from hydrocarbon to hydrogen had been recognized. However, safe and convenient refueling and widespread availability of hydrogen from various energy sources are the prerequisite for the development of hydrogen economy. This research focuses on the hydrogen filling station with on-site hydrogen production by electrolysis of water. The virtual wind farm and on-site installed photovoltaic (PV) supply the main and renewable …
Battery Identification Methods Based On Equivalent Circuit Model, Matthew Cole Ragsdale
Battery Identification Methods Based On Equivalent Circuit Model, Matthew Cole Ragsdale
Electrical Engineering Theses - Archive
Development of an intelligent battery diagnostic system is a necessity for future transportation industry. These technologies will have the potential to create profound impact in other industries such as portable electronics. This thesis reports on battery identification methods that are primarily engineered to detect the chemistry, number of cells, and state of charge in an unknown package of batteries. The proposed methods have the potential to be used for condition monitoring in a known set of batteries thereby, creating a health monitoring apparatus that can be an integral part of a battery management system using any of the prominent lead …
Blocking Reader: Design And Implementation Of A Low-Cost Passive Uhf Rfid Blocking Reader, Gaurov Narayanaswamy
Blocking Reader: Design And Implementation Of A Low-Cost Passive Uhf Rfid Blocking Reader, Gaurov Narayanaswamy
Electrical Engineering Theses - Archive
In this thesis I present a low-cost passive UHF ISO 18000-6C RadioFrequency Identification, or RFID, reader that is feasible for mobileand privacy applications. Low cost readers are necessary to achievethe promised cost savings and enhanced revenue generation that theInternet of Things promises to deliver. Low cost readers may beinstalled virtually everywhere, providing real-time asset monitoringand a host of new and innovative applications yet to be conceived.While pervasively deployed readers provide tremendous benefits, thepromiscuous nature of the 18000-6C tags means that the readers alsopose a threat to personal security and privacy. Privately owned tags on a person will be read by …
Theia: Radio Frequency Identification Performance Analysis Tool, Jason Francis Pereira
Theia: Radio Frequency Identification Performance Analysis Tool, Jason Francis Pereira
Electrical Engineering Theses - Archive
In recent years there has been an increase in the adoption of Radio FrequencyIdentication or RFID systems for most applications that deal with investment (products/people) tracking. The ideal requirements of investment tracking systems are :-lost-cost, zero maintenance and eciency.Although the applications are similar in nature, the scenarios and operating environmentsare not. This is a problem that plagues an inexpert consumer of RFIDsystems. RFID systems are application specic and hence have to be properly customizedto the application environment. One solution to this problem is to have theinstallation set up by an expert, but this is impractical due to recurring costs for …
Implementation Of Autonomous Navigation And Obstacle Avoidance On An Unmanned Ground Vehicle, Pranav Naresh Desai
Implementation Of Autonomous Navigation And Obstacle Avoidance On An Unmanned Ground Vehicle, Pranav Naresh Desai
Electrical Engineering Theses - Archive
This thesis presents the implementation of a novel distributed embedded systems approach to real-time obstacle avoidance and guidance for an Unmanned Ground Vehicle (UGV). The mobility, real-time, and limited size requirements of UGVs, result in computationally limited and resource constrained hardware platform. The use of distributed computational resources, such as multiple embedded micro-controllers, enables the distribution of the computing resources for obstacle avoidance and guidance system functionalities. The resulting system's complexity is significantly greater than that of a single high performance processor performing all of the above functions. The hardware platform is integrated with sensors and micro-controllers to function as …
Performance Analysis And Comparison Of Dirac Video Codec With H.264 / Mpeg-4 Part 10 Avc, Aruna Ravi
Performance Analysis And Comparison Of Dirac Video Codec With H.264 / Mpeg-4 Part 10 Avc, Aruna Ravi
Electrical Engineering Theses - Archive
Dirac is a hybrid motion-compensated state-of-the-art video codec that uses modern techniques such as wavelet transforms and arithmetic coding. It is an open technology, designed to avoid patent infringement and can be used without the payment of license fees. It is well suited to the business model of public service broadcasters as it can be easily recreated for new platforms. Dirac is aimed at applications ranging from HDTV (high definition television) to web streaming.H.264, MPEG-4 part-10 or AVC, is the latest digital video codec standard which has proven to be superior than earlier standards in terms of compression ratio, quality, …
Modeling An Instrumented (Tractor-Semitrailer Combination) Vehicle: Using System Identification Methods, Bito Irie
Electrical Engineering Theses - Archive
In this thesis, properties of the input-output relationships of a tractor-semitrailer combination vehicle were analyzed. Predictive models of the system were identified using only input-output data collected separately but for the same portion of the road. A vehicle equipped with an inertial profiling system and a strain gauge instrumented truck were used to collect the input and output data, respectively. Input-output combinations such as single-input-single-output (SISO), multiple-input-single-output (MISO), and multiple-input-multiple-output (MIMO) representing the vehicle models were investigated using the polynomial and state-space black-box modeling (i.e., system identification) techniques. Comparisons among measured and k-steps ahead predicted outputs and residual analysis were …
Electrical Detection Of Single-Based Dna Mutation Using Functionalized Nanoparticles, Mohammud R. Noor
Electrical Detection Of Single-Based Dna Mutation Using Functionalized Nanoparticles, Mohammud R. Noor
Electrical Engineering Theses - Archive
DNA molecules posses unique structure and molecular recognition properties that makes them excellent candidate for bio-chemical sensors. Understanding the mechanism of charge transport in DNA is essential to develop DNA based molecular electronic devices. In the experiment reported in this thesis, we analyzed an electrical method to detect specific DNA. Hairpin probe DNA was engineered to melt and hybridize with certain perfect complementary sequences and immobilized on a silicon chip between gold nanoelectrodes. Hybridization of target DNA to the hairpin melts or open up the stem nucleotides, which provides DNA hybridization sites. Gold nanoparticle-conjugated universal reporter sequence detects the open …
Independent Source Extraction Applied To Radar Imaging, Jeffrey Brandon Hall
Independent Source Extraction Applied To Radar Imaging, Jeffrey Brandon Hall
Electrical Engineering Theses - Archive
Multiple scattering and random interactions among scattering elements and between the scatterers and the background adversely affect the radar image quality and target detection capability. In radar images formed using physical optics (PO) based techniques, multiple scattering and interactions appear as non-physical scattering centers. A method to enhance the performance of PO based radar imaging systems by extracting independent scattering centers is investigated in this thesis. Independent Component Analysis (ICA) is applied to returns of a radar system to extract independent scattering elements based on their non-Gaussianity. As an example, this method of target extraction is implemented in inverse synthetic …
Micromachined Nanoporous Membranes For Blood Oxygenation Systems, Vijayakrishnan Ambravaneswaran
Micromachined Nanoporous Membranes For Blood Oxygenation Systems, Vijayakrishnan Ambravaneswaran
Electrical Engineering Theses - Archive
An oxygenator is a medical device that aids in the exchange of oxygen and carbon dioxide in the human blood during procedures and illnesses that may cause the interruption or cessation of blood flow in the body. Porous membranes currently used in blood-oxygenation systems are bulky, and the pores are relatively large in dimension. The control over the pore size is poor due to the fabrication techniques used. The standard deviation of the pore size and the placement of the pores deteriorate even further with decreasing pore diameter. It is because of inaccurate pore placement and poor control over the …
Improved Design Of A Piecewise Linear Network, Sayantani Pal
Improved Design Of A Piecewise Linear Network, Sayantani Pal
Electrical Engineering Theses - Archive
An efficient design of the Piecewise Linear Network (PLN) which maps the N dimensional input vector space into an M dimensional output vector space is presented. Several clusters are formed in the given datasets and a linear mapping is fitted for each cluster using regression and the total mapping error is calculated. We have designed this network using Self Organizing Map (SOM) clustering which uses the Euclidean distance measure. Again the same has been designed by using various weighted distance measures whose results are compared. It is observed that there is a decrease in Mean Square Error (MSE) of the …
Study Of Patch Antennas For Strain Measurement, Uday Shankar Tata
Study Of Patch Antennas For Strain Measurement, Uday Shankar Tata
Electrical Engineering Theses - Archive
Reliable strain measurement is important for damage detection of mechanical and civil structures. Existing wireless strain sensing technologies require a high operating voltage, bulky signal conditioning systems, and an external wireless module to transmit the sensor output. These limitations make the strain monitoring unreliable and expensive. An innovative method of measuring strain using a patch antenna is investigated in this thesis to overcome the limitations of existing strain sensing technologies. The patch antenna is made of a thin sheet of low-loss insulating material, called the dielectric substrate. The antenna pattern, i.e. a metallic patch, is printed on one side of …
Error Correction Methods For Latency-Constrained Flash Memory Systems, Priyanka Ankolekar
Error Correction Methods For Latency-Constrained Flash Memory Systems, Priyanka Ankolekar
Electrical Engineering Theses - Archive
Maintaining the reliability of data stored in Flash devices and reading it correctly has become a challenge as the demand for higher density is forcing aggressive shrinking of Flash architectures. For all Flash systems, especially latency-constrained NOR Flash, an on-chip error correction code (ECC) is the only viable and robust solution to this problem. This thesis investigates and optimizes low-latency error correction schemes for on-chip implementation in NOR systems using existing error correction methods as a starting point. As the first step towards doing this, a mathematical relation has been derived to compute the bit error rate (BER) of a …
Automation Of Thermal Model Extraction And Optimization, Obiorah Oji
Automation Of Thermal Model Extraction And Optimization, Obiorah Oji
Electrical Engineering Theses - Archive
Semiconductor device model optimization is highly beneficial; it improves the accuracy with which we can predict the performance of real devices and whole circuits before they are fabricated. This helps save time and money in being able to predict undesirable circuit responses. Although, it proves to be very useful, it can become very time consuming. The goal of this thesis is to use readily available tools to enhance and automate the somewhat complex process of optimization and streamline it so that results can be analyzed quicker with the goal of generating VBIC models that accurately match the behavior of the …
Design Of Analog Correlator For 22-29ghz Uwb Vehicular Radar Systems In Ibm 90nm Cmos Process, Niranjan Karandikar
Design Of Analog Correlator For 22-29ghz Uwb Vehicular Radar Systems In Ibm 90nm Cmos Process, Niranjan Karandikar
Electrical Engineering Theses - Archive
In this thesis analog correlator is designed for UWB vehicular radar system. Operating frequency of the correlator is 22-29GHz. IBM 90nm CMOS process is used for the design, Simulation are done in CADENCE Spectre and SpectreRF. UWB signal of 22-29GHz is generated in ADS. Gaussian mono-pulse is shaped with band-pass filter to meet FCC mask. Simulations are done by using this signal. Typical receiver of UWB system consists of LNA, analog correlator and ADC. Analog correlator is the matched filter which is a part of receiver. It is used to detect the incoming RF signal by maximizing signal to noise …