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Consideration Of Dispersion And Group Velocity Dispersion In The Determination Of Velocities Of Electromagnetic Propagation, Monish Ranjan Chatterjee, Partha P. Banerjee 2010 University of Dayton

Consideration Of Dispersion And Group Velocity Dispersion In The Determination Of Velocities Of Electromagnetic Propagation, Monish Ranjan Chatterjee, Partha P. Banerjee

Electrical and Computer Engineering Faculty Publications

Electromagnetic (EM) propagation velocities play an important role in the determination of power and energy flow in materials and interfaces. It is well known that group and phase velocities need to be in opposition in order to achieve negative refractive index.

Recently, we have shown that considerable differences may exist in phase, group and signal/energy velocities for normal and anomalous dispersion, especially near dielectric resonances. This paper examines the phase and group velocities in the presence of normal and anomalous dispersion, and group velocity dispersion (GVD), which requires introduction of the second order coefficient in the permittivity and permeability ...


Differentially Encoded Quadrature Phase Shift Key Communication And Real-Time Implementation, Robert Walton Conant 2010 Boise State University

Differentially Encoded Quadrature Phase Shift Key Communication And Real-Time Implementation, Robert Walton Conant

Boise State University Theses and Dissertations

Robust communication methods are integral to advances in modern technology. Software defined radios (SDRs) have been the chief instruments of communication for the last three decades. Upcoming generations of wireless networks and phone systems depend on successful implementations of increasingly sophisticated software defined modulation methods. The challenges presented by encoding, modulation, signal conditioning, timing, and decision algorithms are non-trivial. Adapting to the impacts of wired and wireless channels adds further complexity.

While not comprehensive on the subject of communications, this text serves to introduce the practical concepts of binary communications, modulation methods, the digital signal processor (DSP), and software defined ...


Minimum Cost Content Distribution Using Network Coding: Replication Vs. Coding At The Source Nodes, Shurui Huang, Aditya Ramamoorthy, Muriel Médard 2010 Iowa State University

Minimum Cost Content Distribution Using Network Coding: Replication Vs. Coding At The Source Nodes, Shurui Huang, Aditya Ramamoorthy, Muriel Médard

Electrical and Computer Engineering Conference Papers, Posters and Presentations

Abstract: Consider a large file that needs to be multicast over a network to a given set of terminals. Storing the file at a single server may result in server overload. Accordingly, there are distributed storage solutions that operate by dividing the file into pieces and placing copies of the pieces (replication) or coded versions of the pieces (coding) at multiple source nodes. Suppose that the cost of a given network coding based solution to this problem is defined as the sum of the storage cost and the cost of the flows required to support the multicast. In this work ...


Wideband Limiter Fits Sot-323 Pack, Chin-Leong Lim 2010 Avago Technologies, Malaysia

Wideband Limiter Fits Sot-323 Pack, Chin-Leong Lim

Chin-Leong Lim

Limiters protect wireless receiver front-ends from damage due to signal overload. The Schottky-PIN limiter is more protective than the self-biased PIN limiter because the former's limiting threshold is ~10 dB lower. Present implementation of the Schottky-PIN limiter use separate PIN and Schottky diodes. Additionally, some prior knowledge is necessary to select the correct PIN and Schottky diodes for limiter service. To miniaturize the limiter and to simplify the diode selection process, we combined a pair of limiter-optimized PIN and Schottky diodes into a compact and low-cost SOT-323 package. This paper describes the design, fabrication and experimental validation of the ...


Maximum-Likelihood Sequence Detector For Dynamic Mode High Density Probe Storage, Naveen Kumar, Pranav Agarwal, Aditya Ramamoorthy, Murti V. Salapaka 2010 Iowa State University

Maximum-Likelihood Sequence Detector For Dynamic Mode High Density Probe Storage, Naveen Kumar, Pranav Agarwal, Aditya Ramamoorthy, Murti V. Salapaka

Electrical and Computer Engineering Conference Papers, Posters and Presentations

There is an increasing need for high density data storage devices driven by the increased demand of consumer electronics. In this work, we consider a data storage system that operates by encoding information as topographic profiles on a polymer medium. A cantilever probe with a sharp tip (few nm radius) is used to create and sense the presence of topographic profiles, resulting in a density of few Tb per in.2. The prevalent mode of using the cantilever probe is the static mode that is harsh on the probe and the media. In this article, the high quality factor dynamic ...


Characterization Of The Rfx400 For Use In Software Defined Radio, Edward Adams 2010 California Polytechnic State University - San Luis Obispo

Characterization Of The Rfx400 For Use In Software Defined Radio, Edward Adams

Computer Engineering

While software defined radio is an extremely flexible technology that is fairly rarely used, as a single purpose radio is much cheaper, it provides an excellent means of learning RF and communications skills through the lens of digital electronics, and it would behoove a Cal Poly student interested in these areas to take on a project in software defined radio. This project aims to lower the barrier to entry for future students to undertake such a project. The use of an up-converter/down-converter is documented for future students to interface with.


La Traducción Del Software De Mindbody Al Español, Molly Kathryn McFarland 2010 California Polytechnic State University - San Luis Obispo

La Traducción Del Software De Mindbody Al Español, Molly Kathryn Mcfarland

World Languages and Cultures

This project entails the translation of the business management software of MINDBODY to Spanish to facilitate international communication and commerce for the company. This translation is meant to better equip MINDBODY with the tools necessary to engage in bilingual international commerce. Translation of this software demo is intended to aid the company’s Spanish speaking clientele and prospective clients by breaking down many of the language barriers they currently face with the software in English, and also to promote the recognition of the growing need for bilingualism in the rapidly changing world, both within and outside the realm of business ...


A Constant Conduction Angle Biased Rf Power Amplifier For Improved Linearization In Class C Operation, Greg LaCaille 2010 California Polytechnic State University - San Luis Obispo

A Constant Conduction Angle Biased Rf Power Amplifier For Improved Linearization In Class C Operation, Greg Lacaille

Master's Theses and Project Reports

Class C power amplifiers offer higher efficiency than class B power amplifiers, but suffer from poor linearity. A feedback based biasing system to improve the linearity of a class C power amplifier is designed. A class B amplifier with a gain of 20 dB and 20 MHz bandwidth at 900 MHz acts as the launching point for the design. The biasing and output network of the class B power amplifier is modified to produce a class C amplifier at conduction angles of 180°, 162°, 126°, 90°, and 54°. A feedback based biasing system, which uses two matched and scaled down ...


Aperture Coupled Microstrip Antenna Design And Analysis, Michael Paul Civerolo 2010 California Polytechnic State University - San Luis Obispo

Aperture Coupled Microstrip Antenna Design And Analysis, Michael Paul Civerolo

Master's Theses and Project Reports

A linearly-polarized aperture coupled patch antenna design is characterized and optimized using HFSS antenna simulation software. This thesis focuses on the aperture coupled patch antenna due to the lack of fabrication and tuning documentation for the design of this antenna and its usefulness in arrays and orthogonally polarized communications. The goal of this thesis is to explore dimension effects on aperture coupled antenna performance, to develop a design and tuning procedure, and to describe performance effects through electromagnetic principles.

Antenna parameters examined in this study include the dimensions and locations of the substrates, feed line, ground plane coupling slot, and ...


Negative Conductance Load Modulation Rf Power Amplifier, Cody R. Neslen 2010 California Polytechnic State University - San Luis Obispo

Negative Conductance Load Modulation Rf Power Amplifier, Cody R. Neslen

Master's Theses and Project Reports

The number of mobile wireless devices on the market has increased substantially over the last decade. The frequency spectrum has become crowded due to the number of devices demanding radio traffic and new modulation schemes have been developed to accommodate the number of users. These new modulation schemes have caused very poor efficiencies in power amplifiers for wireless transmission systems due to high peak-to-average power ratios (PAPR). This thesis first presents the issue with classical power amplifiers in modern modulation systems. A brief overview of current attempts to mitigate this issue is provided. A new RF power amplifier topology is ...


Modular Laser Combat System For Remotely Operated Vehicles: Bridging The Gap Between Computer Simulation And Live Fire, Thomas Edward Fulenwider 2010 California Polytechnic State University – San Luis Obispo

Modular Laser Combat System For Remotely Operated Vehicles: Bridging The Gap Between Computer Simulation And Live Fire, Thomas Edward Fulenwider

Master's Theses and Project Reports

In the emerging industry of small unmanned vehicles, pioneered by small businesses and research institutions, a suitable combat system test platform is needed. Computer simulations are useful, but do not provide the definitive proof of effective operation necessary for deployment of a combat system. What is needed is an affordable simulated weapons system that enables live flight testing without the used of live weaponry.

A framework is developed here for the construction of a simulated weapon using Free Space Optical (FSO) infrared communication. It is developed in such a way to ensure compatibility with a variety of platforms including ground ...


Maximum-Likelihood Sequence Detector For Dynamic Mode High Density Probe Storage, Naveen Kumar, Pranav Agarwal, Aditya Ramamoorthy, Murti V. Salapaka 2010 Iowa State University

Maximum-Likelihood Sequence Detector For Dynamic Mode High Density Probe Storage, Naveen Kumar, Pranav Agarwal, Aditya Ramamoorthy, Murti V. Salapaka

Electrical and Computer Engineering Publications

There is an increasing need for high density data storage devices driven by the increased demand of consumer electronics. In this work, we consider a data storage system that operates by encoding information as topographic profiles on a polymer medium. A cantilever probe with a sharp tip (few nm radius) is used to create and sense the presence of topographic profiles, resulting in a density of few Tb per in.2. The prevalent mode of using the cantilever probe is the static mode that is harsh on the probe and the media. In this article, the high quality factor dynamic ...


5 Ghz Band Vehicle-To-Vehicle Channels: Models For Multiple Values Of Channel Bandwidth, Qiong Wu, David W. Matolak, Indranil Sen 2010 University of South Carolina - Columbia

5 Ghz Band Vehicle-To-Vehicle Channels: Models For Multiple Values Of Channel Bandwidth, Qiong Wu, David W. Matolak, Indranil Sen

Faculty Publications

In Sen and Matolak's earlier paper, 5-GHz-band vehicle-to-vehicle (V2V) channel models were presented for channel bandwidths of 5 and 10 MHz. In this paper, we provide additional tapped delay line models for bandwidths of 1, 20, 33.33, and 50 MHz based upon the data used in Sen and Matolak's paper. We provide tables of channel parameters for five types of V2V channel classes and also include example tap correlation coefficients. Root-mean-square delay spread values are summarized, as are values of bandwidth for which the channel frequency correlation takes values of 0.7 and 0.5. As with ...


Simple Ofdm, Andrew Marcum, Todor Cooklev, C. Pomalaza-Ráez 2010 Indiana University - Purdue University Fort Wayne

Simple Ofdm, Andrew Marcum, Todor Cooklev, C. Pomalaza-Ráez

Engineering Faculty Publications

There is a significant demand for a decreasein the size, weight and power (SWaP) associated withwireless systems. In this research, a low-complexityMIMO OFDM system is advanced. The proposedsystem is essentially multiplierless and thus requiresmuch simpler digital hardware to be implemented. As aresult, the chip area associated with the MIMO OFDMsystem can be significantly reduced. The reduction incomplexity is obtained via modification to the FastFourier Transform (FFT) and Inverse Fast FourierTransform (IFFT) algorithms necessary to implementOFDM multi-carrier modulation. Computationalcomplexity is reduced by quantizing what are known asthe “twiddle factors” in traditional FFT algorithms suchas the Radix-4. The quantization allows for allmultiplications ...


Touch Screen Sound Controller, James Fenley, Jonathan Law 2010 California Polytechnic State University - San Luis Obispo

Touch Screen Sound Controller, James Fenley, Jonathan Law

Electrical Engineering

The Touch Screen Sound Controller sets out to explore the use of a touch screen as a sound control interface for the disk jockey profession. In addition, the project aims to provide an alternate means of transferring audio data by way of TCP/IP communications as opposed to MIDI. By applying our method, a user may stream pulse-code modulated data from a server onto a client’s RAM via an Ethernet connection. A 32bit, 200MHz ARM9 microprocessor addresses data from the RAM and proceeds with executing DSP instructions from the user. The connection between the touch screen and the central ...


Sign Language Glove, Nicholas Born 2010 California Polytechnic State University - San Luis Obispo

Sign Language Glove, Nicholas Born

Electrical Engineering

Between 500,000 and 2 million Americans use American Sign Language (ASL) as their primary language. As such, a device capable of translating those movements into text would be useful in many areas, such as teaching and the entertainment industry.

The goal of this project was to show that the creation of a glove device that takes in sign language letters, interprets them into the desired characters, and can input those characters into a computer is feasible. I chose to work on this project for many different reasons. One reason is many members of my family know sign language and ...


Micro Forest Fire Detection, John Cape 2010 California Polytechnic State University - San Luis Obispo

Micro Forest Fire Detection, John Cape

Electrical Engineering

No abstract provided.


Fm Radio Receiver With Digital Demodulation, Nicholas Burnett 2010 California Polytechnic State University - San Luis Obispo

Fm Radio Receiver With Digital Demodulation, Nicholas Burnett

Electrical Engineering

This paper reports on the design, construction, and testing of an FM receiver. The design is split into two portions, the analog FM front end and the digital demodulator. The job of the front end is to down convert the RF signal to a frequency that is low enough to sample with an analog to digital converter. The construction of the front end is done using what is known as “Ugly Construction.” That is, all the components are soldered together floating over a ground plane.

The second portion of the design is the demodulator. The phase lock loop method of ...


Circular Polarized Splatch Antenna, Cynthia Truong 2010 California Polytechnic State University - San Luis Obispo

Circular Polarized Splatch Antenna, Cynthia Truong

Electrical Engineering

The Splatch Antenna combines excellent performance and cost-effectiveness into an antenna package that can be integrated. The goal of this project is to figure out how to connect two Splatch antennas to realize a Circular Polarized (CP) antenna. The advantage of CP versus linear polarization is that CP eliminates polarization mismatch losses caused by Faraday’s rotation.


Ofdm Simulation In Matlab, PAUL GUANMING LIN 2010 California Polytechnic State University – San Luis Obispo

Ofdm Simulation In Matlab, Paul Guanming Lin

Electrical Engineering

No abstract provided.


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