Recently added

Theses and Dissertations (Electrical, Electronic and Computer Engineering): Recent submissions

  • A method of voltage tracking for power system applications 
    Visser, Jacobus (University of Pretoria, 2010-09-10)
    An algorithm that is capable of estimating the parameters of non-stationary sinusoids in real-time lends application to various branches of engineering. Non-stationary sinusoids are sinusoidal signals with time-varying ...
  • Design methods for integrated switching-mode power amplifiers 
    Bozanic, Mladen (University of Pretoria, 2011)
    While a lot of time and resources have been placed into transceiver design, due to the pace of a conventional engineering design process, the design of a power amplifier is often completed using scattered resources; and ...
  • LC-ladder and capacitive shunt-shunt feedback LNA modelling for wideband HBT receivers 
    Weststrate, Marnus (University of Pretoria, 2011)
    Although the majority of wireless receiver subsystems have moved to digital signal processing over the last decade, the low noise amplifier (LNA) remains a crucial analogue subsystem in any design being the dominant subsystem ...
  • A SiGe BiCMOS LNA for mm-wave applications 
    Janse van Rensburg, Christo (University of Pretoria, 2012-04-24)
    A 5 GHz continuous unlicensed bandwidth is available at millimeter-wave (mm-wave) frequencies around 60 GHz and offers the prospect for multi gigabit wireless applications. The inherent atmospheric attenuation at 60 GHz ...
  • Optimal handling and fault-tolerant speed regulation of heavy haul trains 
    Zhuan, Xiangtao T. (University of Pretoria, 2007-08-01)
    Heavy haul trains are used to transport mineral resources from inland mines to harbours in South Africa. It is believed that the cost is less with a larger load per car or per train. This has resulted in the use of long ...
  • Feasibility of CMOS optical clock distribution networks 
    Venter, Petrus Johannes (University of Pretoria, 2009)
    CMOS is well known for its ability to scale. This fact is reflected in the aggressive scaling on a continual basis from the invention of CMOS up to date. As devices are scaled, device performance improves due to shorter ...
  • Mobile commerce over GSM: A banking perspective on security 
    Van der Merwe, Pieter Ben (University of Pretoria, 2005-09-15)
    GSM has changed the face of communication and information exchange, much as the Internet did. With the advances made in the mobile technology arena, new opportunities are created. Mobile Commerce (m-Commerce) is one such ...
  • Peripheral control tools for a run-of-mine ore milling circuit 
    Olivier, Laurentz Eugene (University of Pretoria, 2012-07-20)
    Run-of-mine ore milling circuits are generally difficult to control owing to the presence of strong external disturbances, poor process models and the unavailability of important process variable measurements. These ...
  • An ultra-low duty cycle sleep scheduling protocol stack for wireless sensor networks 
    Kleu, Christo (University of Pretoria, 2012-07-19)
    A wireless sensor network is a distributed network system consisting of miniature spatially distributed autonomous devices designed for using sensors to sense the environment and cooperatively perform a specific goal. Each ...
  • Development of a robust active infrared-based eye tracking system 
    Coetzer, Reinier Casper (University of Pretoria, 2011)
    Eye tracking has a number of useful applications ranging from monitoring a vehicle driver for possible signs of fatigue, providing an interface to enable severely disabled people to communicate with others, to a number of ...
  • Modelling and control of an articulated underground mining vehicle 
    Kohlmeyer, Rolf Reimar (University of Pretoria, 2012-07-16)
    The automation of the tramming or load, haul and dump (LHD) procedure, performed by a LHD vehicle, holds the potential to improve productivity, efficiency and safety in the mining environment. Productivity is mainly increased ...
  • A framework for evaluating countermeasures against sybil attacks in wireless sensor networks 
    Govender, Servapalan (University of Pretoria, 2011-07-14)
    Although Wireless Sensor Networks (WSNs) have found a niche in numerous applications, they are constrained by numerous factors. One of these important factors is security in WSNs. There are various types of security attacks ...
  • Analysing the behaviour of a smart card based model for secure communication with remote computers over the internet 
    Bhatt, Deep Vardhan (University of Pretoria, 2011-07-14)
    This dissertation presents the findings of a generic model aimed at providing secure communication with remote computers via the Internet, based on smart cards. The results and findings are analysed and presented in great ...
  • Customer-orientated hot water load management 
    Wilken, Andries Stephan (University of Pretoria, 2007-07-12)
    Please read the abstract in the section 00front of this document
  • Five-level inverter employing WRPWM switching scheme 
    Chaing, Chia-Tsung (University of Pretoria, 2005)
    Multilevel Random Pulse Width Modulation (RPWM) schemes have drawn increasing attention in the past few years. Multilevel topologies provide high voltage and high power capabilities and random PWM schemes offer reduction ...
  • The management of electricity cost within an Academic Institution 
    Calmeyer, James Edward (University of Pretoria, 2007-07-09)
    Please read the abstract in the section 00front of this document
  • A Security Policy for a Distributed Utility Metering System 
    Burger, Rudolph Christiaan (University of Pretoria, 2007-07-10)
    This dissertation describes a security policy for a distributed utility metering system. The system uses untrusted networks, such as the Internet, to communicate between service providers (water, gas, electricity etc.) and ...
  • Sparse graph codes on a multi-dimensional WCDMA platform 
    Vlok, Jacobus David (University of Pretoria, 2007-07-06)
    Digital technology has made complex signal processing possible in communication systems and greatly improved the performance and quality of most modern telecommunication systems. The telecommunication industry and specifically ...
  • Gesture recognition in a smart room environment 
    Smit, Christiaan Coenraad Joubert (University of Pretoria, 2006-07-12)
    Much of our interaction with the environment is physical. We use our bodies for nonverbal expression or to augment or emphasize verbal communication. In other cases we use our bodies to execute tasks such as walking or ...
  • Modelling for control of a Steckel hot rolling mill 
    Scholtz, Ernst (University of Pretoria, 2007-07-02)
    Please read the abstract in the section 00front of this document