Browsing Masters Degrees (Electrical and Electronic Engineering) by Title

Now showing items 390-409 of 574

    • Language identification using Gaussian mixture models 

      Nkadimeng, Calvin (Stellenbosch : University of Stellenbosch, 2010-03)
      ENGLISH ABSTRACT: The importance of Language Identification for African languages is seeing a dramatic increase due to the development of telecommunication infrastructure and, as a result, an increase in volumes of data ...

    • An LDPC error control strategy for low earth orbit satellite communication link applications 

      Olivier, Francois Jacobus (Stellenbosch : University of Stellenbosch, 2009-12)
      ENGLISH ABSTRACT: Low earth orbit (LEO) satellite communication presents a unique environment which inherently di ers from most other communication channels. Due to the varying orbital patterns of LEO satellites the link ...

    • Linearisation of an FM-CW 94.5 GHz millimeter-wave radar 

      De Wit, W. M. (Stellenbosch : University of Stellenbosch, 2006-03)
      The topic of millimeter wave radar systems is introduced. These radars are used in a wide range of applications in both the aviation and automotive field due to the resolution advantages which MMW systems have above their ...

    • Low bit rate speech coding 

      Kritzinger, Carl (Stellenbosch : University of Stellenbosch, 2006-03)
      Despite enormous advances in digital communication, the voice is still the primary tool with which people exchange ideas. However, uncompressed digital speech tends to require prohibitively high data rates (upward of ...

    • A low cost, high precision star sensor 

      Jacobs, M. J. (Stellenbosch : University of Stellenbosch, 1995-12)
      ENGLISH ABSTRACT: The Sunsat microsatellite is being developed at the University of Stellenbosch. It is equipped with a high resolution earth imager which requires a sophisticated attitude determination and control system. ...

    • Low impedance characterisation and modeling of high power LDMOS devices 

      Malan, Pieter Jacob De Villiers (Stellenbosch : University of Stellenbosch, 2005-12)
      In RF power transistor characterisation, the designer is confronted with low impedance measurements (typically from 1 Ohm to 12 Ohm). These transistors are contained in metal-ceramic packages of which the lead widths ...

    • A low noise PLL-based frequency synthesiser for X-band radar 

      Moes, Henderikus Jan (Stellenbosch : Stellenbosch University, 2008-03)
      This thesis discusses the design, development and measured results of a phase-locked loop based frequency synthesiser for X-band Doppler radar. The objective is to obtain phase noise comparable or lower than that typically ...

    • Low phase noise cylindrical cavity oscillator 

      Maree, Jacques (Stellenbosch : Stellenbosch University, 2013-03)
      ENGLISH ABSTRACT: The objective of this thesis is to develop a 9.2 GHz low phase noise oscillator with a cylindrical cavity resonator. A cylindrical metal cavity with air as dielectric was used as a resonator. To minimise ...

    • Low-cost, portable biosensors for Escherichia coli detection in water 

      Maas, Michael Benjamin (Stellenbosch : Stellenbosch University, 2015-12)
      ENGLISH ABSTRACT: Low-cost, portable biosensors for the detection of Escherichia coli (E. coli) in water were investigated. The operating principle of various biosensors is discussed at the hand of a biosensor model. ...

    • Machine learning approach to radio frequency interference(RFI) classification in Radio Astronomy 

      Wolfaardt, Cornelis Johannes (Stellenbosch : Stellenbosch University, 2016-03)
      ENGLISH ABSTRACT: Radio frequency interference (RFI) presents a large problem for radio telescopes. Interference prevents observations from being made, or extends the duration required for observations. This thesis ...

    • Magnetic field visualization for superconducting circuits 

      Van Staden, Ruben (Stellenbosch : Stellenbosch University, 2016-03)
      ENGLISH ABSTRACT: Ambient magnetic fields, trapped flux and fields generated by bias and ground return currents affect superconducting electronic circuits negatively. Analysis of current distribution in bias lines and in ...

    • Markerless augmented reality on ubiquitous mobile devices with integrated sensors 

      Van Wyk, Carel (Stellenbosch : University of Stellenbosch, 2011-03)
      ENGLISH ABSTRACT: The computational power of mobile smart-phone devices are ever increasing and high-end phones become more popular amongst consumers every day. The technical speci cations of a high-end smart-phone today ...

    • Mathematical and numerical analysis of electrospraying electrodynamics 

      Pieterse, Cornelius Louwrens (Stellenbosch : Stellenbosch University, 2014-12)
      ENGLISH ABSTRACT: The electrodynamics of arbitrary, point-to-plane electrospraying geometries, were investigated in this research both analytically and numerically. Electrospraying is the process during which particles ...

    • Mesh termination schemes for the finite element method in electromagnetics 

      Young, Andre (Stellenbosch : Stellenbosch University, 2007-12)
      The finite element method is a very efficient numerical tool to solve geometrically complex problems in electromagnetics. Traditionally the method is applied to bounded domain problems, but it can also be forged to solve ...

    • Methods to extract maximum electrical energy from PV panels on the earth's surface 

      Bekker, Bernard (Stellenbosch : Stellenbosch University, 2004-12)
      ENGLISH ABSTRACT: This thesis investigates methods to extract the maximum amount of electrical energy from a py panel. The thesis is divided into four parts, focussing on different aspects relating to this topic. The ...

    • Metrology and modelling of high frequency probes 

      Badenhorst, J. (Stellenbosch : Stellenbosch University, 2008-03)
      This study investigates high frequency probes through good metrology and computation software such as CST. A factor that can strongly influence the accuracy of measurements, is common mode (CM) current. Therefore, the ...

    • Micro-satellite data handling : a unified information model 

      Van der Merwe, Benjamin (Stellenbosch : Stellenbosch University, 2001-04)
      ENGLISH ABSTRACT: This thesis describes various software technologies implemented, or specifically developed, for the SUNSAT micro-satellite mission. With the discussion centered on the Mission Operations System functions ...

    • Microwave data transmission by means of an optimal bandwidth multichannel QPSK system 

      Malan, Jacques de Villiers (Stellenbosch : Stellenbosch University, 2004)
      ENGLISH ABSTRACT: The increase in the complexity and functionality of new satellites leads to a growing demand for a digital communication system operating at a much higher bit rate than before. The main purpose of this ...

    • Microwave frequency discriminators 

      Geldenhuys, N. D. (Stellenbosch : Stellenbosch University, 2001-03)
      ENGLISH ABSTRACT: The topic of microwave frequency discriminators is introduced. Various applications and implementation techniques of these devices are given and discussed. This thesis may serve as reference foundation ...

    • Microwave heating of multiphase materials : modelling and measurement 

      Louw, Willem J. (Stellenbosch : Stellenbosch University, 2005-12)
      ENGLISH ABSTRACT: Both coaxial probe and waveguide (WG) measurement systems for electric and magnetic material property extraction were investigated. These measurement techniques were used to determine electrical properties ...