Browsing Department of Electrical and Electronic Engineering by Title

Now showing items 1-20 of 834

    • A 10 GHz oversampling delta modulating analogue-to-digital converter implemented with hybrid superconducting digital logic 

      Fourie, Coenrad Johann (Stellenbosch : Stellenbosch University, 2001-03)
      ENGLISH ABSTRACT: Rapid Single Flux Quantum (RSFQ) logic cells are discussed, and new cells developed. The expected yield of every cell is computed through a Monte Carlo analysis, and where necessary these cells are ...

    • 10 kW L-Band planar power combiner 

      Fourie, Gerhardus Johannes (Stellenbosch : University of Stellenbosch, 2006-12)
      This thesis relates to the design and characterization of a 10 kW L-band power combiner consisting of 8 input ports. The design is implemented in a non-radial planar transmission line architecture and operates between ...

    • 2D Edge-based finite elements for guided and scattered wave problems 

      Hansmann, Riana Helena (Stellenbosch : Stellenbosch University, 1999-03)
      ENGLISH ABSTRACT: This thesis may be divided into two parts: the first describes the Finite Element Method (FEM) and its application to guided wave problems. The second part is devoted to scattering configurations, ...

    • A 3-axis attitude control system hardware design for a CubeSat 

      Gerber, Jako (Stellenbosch : Stellenbosch University, 2014-12)
      ENGLISH ABSTRACT: With CubeSats becoming popular as a cheap alternative to larger satellites, the need for advanced miniature attitude determination and control systems (ADCS) arises to meet the pointing requirements of ...

    • 3-Axis geomagnetic magnetometer system design using superconducting quantum interference devices 

      Kilian, Anton Theo (Stellenbosch : Stellenbosch University, 2014-04)
      ENGLISH ABSTRACT: This work discusses the design of a 3-axis Geomagnetometer SQUID System (GSS), in which HTS SQUIDs are used unshielded. The initial GSS installed at SANSA was fully operable, however the LN2 evaporation ...

    • 3-D face recognition 

      Eriksson, Anders (Stellenbosch : Stellenbosch University, 1999-12)
      ENGLISH ABSTRACT: In recent years face recognition has been a focus of intensive research but has still not achieved its full potential, mainly due to the limited abilities of existing systems to cope with varying pose ...

    • 3D tracking between satellites using monocular computer vision 

      Malan, Daniel Francois (Stellenbosch : University of Stellenbosch, 2005-03)
      Visually estimating three-dimensional position, orientation and motion, between an observer and a target, is an important problem in computer vision. Solutions which compute threedimensional movement from two-dimensional ...

    • A computational architecture for real-time systems 

      Mostert, Sias (Stellenbosch : Stellenbosch University, 2000-12)
      ENGLISH ABSTRACT: The engineering of dependable real-time systems for mission critical applications is a resource intensive and error prone process. Achieving dependability requires a general consensus on the correctness ...

    • A multi-mode attitude determination and control system for small satellites 

      Steyn, Willem Hermanus (Stellenbosch : Stellenbosch University, 1995-12)
      ENGLISH ABSTRACT: New advanced control techniques for attitude determination and control of small (micro) satellites are presented. The attitude sensors and actuators on small satellites are limited in accuracy and ...

    • Acceleration based manoeuvre flight control system for unmanned aerial vehicles 

      Peddle, Iain K. (Stellenbosch : Stellenbosch University, 2008-12)
      ENGLISH ABSTRACT: A strategy for the design of an effective, practically feasible, robust, computationally efficient autopilot for three dimensional manoeuvre flight control of Unmanned Aerial Vehicles is presented. The ...

    • Acceleration based manoeuvre flight control system for unmanned aerial vehicles 

      Peddle, Iain K. (Stellenbosch : Stellenbosch University, 2008-12)
      A strategy for the design of an effective, practically feasible, robust, computationally efficient autopilot for three dimensional manoeuvre flight control of Unmanned Aerial Vehicles is presented. The core feature of ...

    • Accurate autonomous landing of a fixed-wing unmanned aerial vehicle 

      Alberts, Frederik Nicolaas (Stellenbosch : Stellenbosch University, 2012-12)
      ENGLISH ABSTRACT: This thesis presents the analysis, design, simulation and practical implementation of a control system to achieve an accurate autonomous landing of a fixed-wing unmanned aerial vehicle in the presence ...

    • Accurate autonomous landing of a fixed-wing unmanned aircraft under crosswind conditions 

      De Bruin, Andrew (Stellenbosch : Stellenbosch University, 2017-03)
      ENGLISH ABSTRACT: This thesis presents the design, implementation and verification of an autopilot system with strong disturbance rejection characteristics, capable of landing a fixed-wing unmanned aircraft accurately under ...

    • Accurate modelling and realisation of a 4th generation wireless communication system 

      Schulze, Shaun (Stellenbosch : University of Stellenbosch, 2006-12)
      A great demand exits for higher data rates and increased reliability of future consumer based mobile communication systems while being more bandwidth and power efficient. Orthogonal frequency division multiplexing (OFDM) ...

    • Active capacitor voltage stabilisation in a medium-voltage flying-capacitor multilevel active filter 

      Hansmann, Chirstine Henriette (Stellenbosch : University of Stellenbosch, 2005-03)
      A switching state substitution must be developed that will make use of both single-phase redundancies and three-phase redundancies in the flying-capacitor topology. Losses should be taken into consideration and the ...

    • An active receiving antenna for borehole pulsed radar applications 

      Van Wyk, M. D. (Stellenbosch : University of Stellenbosch, 2002-12)
      An efficient radiating strucllire was needed for borehole pulsed radar applications in the 10-100 MHz frequency band. Both resistively loaded and insulated wire antennas were investigated and an active antenna is proposed ...

    • Adaptation, optimisation and simulation of the CSMA/CA protocol for a low earth orbit satellite UHF link 

      Cawood, Andrew Dudley (Stellenbosch : University of Stellenbosch, 2006-12)
      A low earth orbit satellite is to provide the telecommunications link to facilitate email services to rural areas, where the infrastructure necessary for e-mail is lacking (e.g. no telephone lines). Communication time ...

    • Adaptive estimation of speech parameters 

      Basson, J. A. L.; Du Preez, J. A. (IEEE, 1994)
      Linear predictive coding (LPC), and transformations of it, is currently the most popular way of analysing speech signals. Major limitations of using a frame-based technique are that each frame is analysed in isolation of ...

    • Adaptive estimation of speech parameters 

      Basson, J. A. L (Stellenbosch : Stellenbosch University, 1994-03)
      ENGLISH ABSTRACT: Linear predictive coding(LPC), and transformations of it, is currently the most popular way of analysing speech signals. Major limitations of using a frame-based technique are that each frame is analysed ...

    • Adaptive noise and interference cancellation for mobile communications. 

      Bonarius, Jason (Stellenbosch : Stellenbosch University, 2016-12)
      ENGLISH ABSTRACT: In an arena of electronic warfare measures, to inhibit enemy operations as well as provide safety for allied forces from radio triggered explosive devices, interference and noise coupling degrade allied ...