Browsing Electronic Engineering by Issue Date
Now showing items 1-20 of 176
-
The Design of high-voltage planar transistors with specific reference to the collector region.
(1984)The thesis represents a major contribution to the understanding of the design and fabrication of high-voltage planar silicon bipolar transistors, and reports on the original research carried out and the special methods ... -
Travelling-wave frequency conversion.
(1985)Travelling-wave distributed amplifiers are providing gain over broad frequency ranges for microwave applications. Similar concepts are applicable to distributed mixers and, with the use of controlled feedback, to a ... -
An Analytic model for high electron mobility transistors.
(1986)The last six years has seen the emergence and rapid development of a new type of field effect transistor, the High Electron Mobility Transistor (HEMT), which offers improved performance in both digital and analogue circuits ... -
An adaptive protocol for use over meteor scatter channels.
(1987)Modem technology has revived interest in the once popular area of meteor scatter communications. Meteor scatter systems offer reliable communications in the 500 to 2000 km range all day, every day. Recent advances in ... -
An intelligent multi-terminal interface.
(1987)The document describes the development of a micro-processor based terminal multiplexer to connect four terminals to a standard Hewlett Packard series 1000 mini-computer. The project was required to fulfill the dual roll ... -
A CAD tool for the prediction of VLSI interconnect reliability.
(1988)This thesis proposes a new approach to the design of reliable VLSI interconnects, based on predictive failure models embedded in a software tool for reliability analysis. A method for predicting the failure rate of ... -
Using a terminal switching exchange for computer peripheral sharing and other purposes.
(1988)Several computers and several tens of terminals at the University of Natal are linked to a terminal switching exchange network known as NUNET, which is in fact part of a countrywide network known as NllNET. This thesis ... -
Modelling and testing microwave magnetrons.
(1988)Though declining in popularity over the last decade, the magnetron still has applications where portable high power is needed. This study examines the predicted performance of cylindrical microwave magnetrons using ... -
A proportional timing generator for measuring intermodulation product distortion on television transposers.
(1989)Broadcasting authorities presently measure intermodulation distortion by applying a three tone simulation of a composite video and sound signal to the transposer and then measuring the relative amplitude of the major ... -
A comparative study of various speech recognition techniques.
(1990)Speech recognition systems fall into four categories, depending on whether they are speaker-dependent or independent of speaker population and on whether they are capable of recognizing continuous speech or only ... -
Predicted and measured arrival rates of meteors over forward-scatter links.
(1991)Investigations into currently accepted methods of modelling variations in the arrival rate of meteors over forward-scatter meteor links have revealed some shortcomings. In these investigations, particular emphasis is ... -
Optimized digital signal processing algorithms applied to radio communications.
(1992)The application of digital signal processing to radio communications has come of age with the advent of low power, high speed microprocessors and over the past five years, various transceiver architectures, utilizing ... -
Computer-aided design of RF MOSFET power amplifiers.
(1992)The process of designing high power RF amplifiers has in the past relied heavily on measurements, in conjunction with simple linear theory. With the advent of the harmonic balance method and increasingly faster computers, ... -
A packet radio system for an industrial data network.
(1992)This project was undertaken for a commercial electronics company, CONTROL LOGIC (CONLOG) which is involved in the research, design, development and manufacture of data acquisition, control, energy management and automotive ... -
Neural networks and early fast Doppler for prediction in meteor-burst communications systems.
(1994)In meteor-burst communications systems, the channel is bursty with a continuously fluctuating signal-to-noise ratio. Adaptive data rate systems attempt to use the channel more optimally by varying the bit rate. Current ... -
The analysis, simulation and testing of an experimental travelling- wave tube.
(1994)As a design and analysis aid for the development of an experimental TWT, a computer program is written which allows the small-signal gain to be computed for various operating conditions, such as various conditions of ... -
The development of an experimental, low profile, broadband travelling wave tube amplifier.
(1994)An experimental, field replaceable travelling wave tube (TWT) with low profile, TEM transitions has been developed with the aim of combining the cost advantages of field replaceable TWTs with the bandwidth advantages of ... -
Protocols for voice/data integration in a CDMA packet radio network.
(1999)Wireless cellular communications is witnessing a rapid growth in, and demand for, improved technology and range of information types and services. Future third generation cellular networks are expected to provide mobile ... -
The implementation of a CDMA system on a FPGA-based software radio.
(2000)This dissertation exammes two of the rlsing technologies in the world of wireless, cellular communications - CDMA and the software radio. This thesis covers many of the issues related to these two emerging field s of ...