Browsing Masters Degrees (Electrical and Electronic Engineering) by Title

Now showing items 315-334 of 578

    • GaN microwave power FET nonlinear modelling techniques 

      Brooks, Clive Raymond (Stellenbosch : University of Stellenbosch, 2010-03)
      ENGLISH ABSTRACT: The main focus of this thesis is to document the formulation, extraction and validation of nonlinear models for the on-wafer gallium nitride (GaN) high-electron mobility (HEMT) devices manufactured at ...

    • Generalised density function estimation using moments and the characteristic function 

      Esterhuizen, Gerhard (Stellenbosch : University of Stellenbosch, 2003-03)
      ENGLISH ABSTRACT: Probability density functions (PDFs) and cumulative distribution functions (CDFs) play a central role in statistical pattern recognition and verification systems. They allow observations that do not ...

    • Generic energy storage controller for a power conditioner 

      Mostert, J. P. F. (Stellenbosch : Stellenbosch University, 2004-03)
      ENGLISH ABSTRACT: This thesis presents the design of a DSP based controller system for an auxiliary converter for generic energy storage connection to a line-interactive power compensator. The aim is to utilize a wide ...

    • A georeferencing method for an open-pit mine surveying radar 

      Rossouw, Emile Francois (Stellenbosch : Stellenbosch University, 2011-03)
      ENGLISH ABSTRACT: Ground-based mobile mine survey radars are much more common now than they were a few years ago. Their ever growing popularity instigated the need for streamlining their operating procedures. One such a ...

    • A GPS-based on-board orbit propagator for low earth-orbiting CubeSats 

      Rossouw, Nico Chris (Stellenbosch : Stellenbosch University, 2015-12)
      ENGLISH ABSTRACT: On-board knowledge of satellite position is vital to all space missions. Due to the stringent power budgets of the CubeSat form factor, permanently active on-board GPS receivers for accurate navigation ...

    • Handwritten signature verification : a hidden Markov model approach 

      Le Riche, Pierre (Pierre Jacques) (Stellenbosch : Stellenbosch University, 2000-12)
      ENGLISH ABSTRACT: Handwritten signature verification (HSV) is the process through which handwritten signatures are analysed in an attempt to determine whether the person who made the signature is who he claims to ...

    • Handwritten signature verification using hidden Markov models 

      Sindle, Colin (Stellenbosch : Stellenbosch University, 2003-12)
      ENGLISH ABSTRACT: Handwritten signatures are provided extensively to verify identity for all types of transactions and documents. However, they are very rarely actually verified. This is because of the high cost of ...

    • Harmonic interaction between weak AC systems and VSC-based HVDC schemes 

      Krige, Ernst (Stellenbosch : Stellenbosch University, 2012-12)
      ENGLISH ABSTRACT: The implementation of the Caprivi Link Interconnector (CLI) High Voltage Direct Current (HVDC) scheme in 2010 connecting the weak Namibian and Zambian Alternating Current (AC) transmission networks via ...

    • Harmonic mixer analysis and design 

      Van der Merwe, Marius (Stellenbosch : Stellenbosch University, 2002-03)
      ENGLISH ABSTRACT: Harmonic mixers are capable of extended frequency operation by mixing with a harmonic of the LO (local oscillator) signal, eliminating the need for a high frequency, high power LO. Their output spectra ...

    • High power LDMOS L-band radar amplifiers 

      McIver, Stuart Roderick Arthur (Stellenbosch : University of Stellenbosch, 2010-03)
      ENGLISH ABSTRACT: The thesis details the design, construction and experimental evaluation of 30W, 35W and 250W L-Band LDMOS Radar amplifiers. Each amplifier module contains an integrated high speed power supply in order ...

    • High voltage DC-DC converter using a series stacked topology 

      Van Rhyn, P. D. (Stellenbosch : University of Stellenbosch, 2006-03)
      This thesis presents the design and implementation of a high voltage DC-DC converter using a series stacked topology. The converter’s specifications were set by Spoornet and the converter forms part of a DC-AC inverter ...

    • High-power broadband absorptive waveguide filters 

      Stander, Tinus (Stellenbosch : University of Stellenbosch, 2009-12)
      ENGLISH ABSTRACT: This dissertation presents a synthesis method for broadband high-power absorptive microwave lters by cascading a wide stop-band wa e-iron lter with an absorptive harmonic pad. The classical image ...

    • High-Temperature Superconductor Step-Edge Fabrication for the Implementation of RSFQ Circuits 

      Snetler, Lukas Hendrick (Stellenbosch : University of Stellenbosch, 2005-03)
      High-temperature superconductive (HTS) logic has become a large research field worldwide. The HTS advantages compared to the low-temperature circuits are the reduced cooling requirements, increased or comparable operation ...

    • Higher order hierarchal curvilinear triangular vector elements for the finite element method in computational electromagnetics 

      Marais, Neilen (Stellenbosch : Stellenbosch University, 2003-03)
      ENGLISH ABSTRACT: The Finite Element Method (FEM) as applied to Computational Electromagnetics (CEM), can be used to solve a large class of Electromagnetics problems with high accuracy, and good computational efficiency. ...

    • An HMM-based automatic singing transcription platform for a sight-singing tutor 

      Krige, Willie (Stellenbosch : Stellenbosch University, 2008-03)
      A singing transcription system transforming acoustic input into MIDI note sequences is presented. The transcription system is incorporated into a pronunciation-independent sight-singing tutor system, which provides ...

    • Hot electron bolometer sensors for millimetre-wave and terahertz wave detection 

      Northeast, David Bernard (Stellenbosch : University of Stellenbosch, 2011-03)
      ENGLISH ABSTRACT: The design and simulation of hot electron bolometer sensors for the detection of millimeter and terahertz wave radiation is presented. These devices can be used for the formation of images or for ...

    • Hover control for a vertical take-off and landing vehicle 

      Wilson, John E. (Stellenbosch : University of Stellenbosch, 2009-03)
      This thesis details the development and comparison of two linear control systems that performhover control for a vertical take-off and landing unmanned aerial vehicle. A non-linear mathematical model of the aircraft ...

    • hp-Adaptation for the FEM Analysis of Waveguides 

      Lezar, Evan (Stellenbosch : Stellenbosch University, 2008-03)
      The nite element method (FEM) is a powerful tool for the computational analysis of a wide range of electromagnetic problems. As the complexity of the problems is increased so are the demands in terms of the computational ...

    • Human-computer interface using a web camera 

      Ellis, Loftie (Stellenbosch : University of Stellenbosch, 2007-12)
      In this thesis we present a human-computer interface (HCI) system for disabled persons using only a basic web camera. Mouse movements are simulated by small movements of the head, while clicks are simulated by eye blinks. ...

    • HV Transmission line and tower inspection safe-fly zone modelling and metrology 

      Groch, Matthew (Stellenbosch : Stellenbosch University, 2013-12)
      ENGLISH ABSTRACT: The deployment of Unmanned Aerial Vehicles (UAV) for power line inspection requires the definition of safe-fly zones. Transient Over-Voltages (TOVs) on the Overhead Transmission Lines (OHTLs) put the ...