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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Multi-FPGA systems /

Hauck, Scott. January 1995 (has links)
Thesis (Ph. D.)--University of Washington, 1995. / Vita. Includes bibliographical references (p. [218]-230).

Experimental investigation of a mm-wave planar antenna /

Lambrakakis, Georgios D. January 1990 (has links) (PDF)
Thesis (M.S. in Electrical and Computer Engineering)--Naval Postgraduate School, June 2009. / Thesis Advisor(s): Janaswamy, Ramakrishna. Second Reader: Neta, Beny. "June 1990." Description based on title screen as viewed on 19 October 2009. DTIC Identifier(s): Planar antennas, antenna arrays, millimeter waves, integrated circuits. Author(s) subject terms: Thesis, word processing, Script, GML, text processing. Includes bibliographical references (p. 124-125). Also available online.

Impedance bandwidth broadening techniques for small patch antennas /

Chiu, Chi Yuk. January 2005 (has links) (PDF)
Thesis (Ph.D.)--City University of Hong Kong, 2005. / "Submitted to Department of Electronic Engineering in partial fulfillment of the requirements for the degree of Doctor of Philosophy" Includes bibliographical references (leaves 152-162)

Models and analysis of antenna array signal processing systems /

McDonald, Keith F., January 1999 (has links)
Thesis (Ph. D.)--Lehigh University, 2000. / Includes vita. Includes bibliographical references (leaves 124-135).

Single event upset testing of flash based field programmable gate arrays

Potgieter, Juan-Pierre January 2015 (has links)
In the last 50 years microelectronics have advanced at an exponential rate, causing microelectronic devices to shrink, have very low operating voltages and increased complexities; all this has made circuits more sensitive to various kinds of failures. These trends allowed soft errors, which up until recently was just a concern for space application, to become a major source of system failures of electronic products. The aim of this research paper was to investigate different mitigation techniques that prevent these soft errors in a Video Graphics Array (VGA) controller which is commonly used in projecting images captured by cameras. This controller was implemented on a Flash Based Field Programmable Gate array (FPGA). A test set-up was designed and implemented at NRF iThemba LABS, which was used to conduct the experiments necessary to evaluate the effectiveness of different mitigation techniques. The set-up was capable of handling multiple Device Under Tests (DUT) and had the ability to change the angle of incidence of each DUT. The DUTs were radiated with a 66MeV proton beam while the monitoring equipment observed any errors that had occurred. The results obtained indicated that all the implemented mitigation techniques tested on the VGA system improved the system’s capability of mitigating Single Event Upsets (SEU). The most effective mitigation technique was the OR-AND Multiplexer Single Event Transient (SET) filter technique. It was thus shown that mitigation techniques are viable options to prevent SEU in a VGA controller. The permanent SEU testing set-up which was designed and manufactured and was used to conduct the experiments, proved to be a practical option for further microelectronics testing at iThemba LABS.

An investigation into the deterioration of source detection due to positional uncertainty, and of how it might be remedied

Quartly, G. D. January 1989 (has links)
No description available.

The development of an experimental system for insertion loss measurements using a truncated, transient parametric array operating in a wide bore tube

Anastasiadis, Kosmas January 1990 (has links)
No description available.

The metal directed assembly of helical arrays

Walker, Juliet Vaughan January 1993 (has links)
No description available.

Eye array sound source localization

Alghassi, Hedayat 05 1900 (has links)
Sound source localization with microphone arrays has received considerable attention as a means for the automated tracking of individuals in an enclosed space and as a necessary component of any general-purpose speech capture and automated camera pointing system. A novel computationally efficient method compared to traditional source localization techniques is proposed and is both theoretically and experimentally investigated in this research. This thesis first reviews the previous work in this area. The evolution of a new localization algorithm accompanied by an array structure for audio signal localization in three dimensional space is then presented. This method, which has similarities to the structure of the eye, consists of a novel hemispherical microphone array with microphones on the shell and one microphone in the center of the sphere. The hemispherical array provides such benefits as 3D coverage, simple signal processing and low computational complexity. The signal processing scheme utilizes parallel computation of a special and novel closeness function for each microphone direction on the shell. The closeness functions have output values that are linearly proportional to the spatial angular difference between the sound source direction and each of the shell microphone directions. Finally by choosing directions corresponding to the highest closeness function values and implementing linear weighted spatial averaging in those directions we estimate the sound source direction. The experimental tests validate the method with less than 3.10 of error in a small office room. Contrary to traditional algorithmic sound source localization techniques, the proposed method is based on parallel mathematical calculations in the time domain. Consequently, it can be easily implemented on a custom designed integrated circuit. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate

A numerical and experimental facility for wire antenna array analysis /

Lemanczyk, Jerzy M. January 1978 (has links)
No description available.

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