Browsing Department of Electrical and Electronic Engineering by Title

Now showing items 1-20 of 872

    • 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 localisation of a multi-rotor using monocular vision 

      Blom, Josua (Stellenbosch : Stellenbosch University, 2018-03)
      ENGLISH ABSTRACT: The mid-frequency aperture array (MFAA) is planned for phase two of the square kilometre array project, which has its design phase scheduled for 2018. The MFAA's antenna arrays need to be characterised ...

    • 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 ...