• Investigation of the scanning performance and enhancement of an electrically large array 

      Cavanagh, Martin N. (Stellenbosch : University of Stellenbosch, 2008-03)
      An existing antenna used in satellite communications is investigated with the goal of improving low angle radiation performance and reducing manufacturing costs. To understand this antenna it is modelled, simulated and ...
    • IQ reflected power canceller for an FMCW radar 

      Stofberg, Anneke (Stellenbosch : Stellenbosch University, 2014-04)
      ENGLISH ABSTRACT: Large close range environmental reflections or poor isolation between the transmit and receive paths of an FMCW radar can overload the receiver. The In phase and Quadrature phase (IQ) Reflected Power ...
    • A Java bytecode compiler for the 8051 micro-controller 

      Mbhambhu, Tsakani Joseph (Stellenbosch : Stellenbosch University, 2002-03)
      ENGLISH ABSTRACT: This report describes the development of a Java Bytecode Compiler (JBC) for the 8051 micro-controller. Bytecodes are found in the class file generated when a Java source file is compiled with the java ...
    • Java implementation of AX.25 link-layer protocol for future micro-satellites 

      Ramonyalioa, Thethe Tshepo (Stellenbosch : Stellenbosch University, 2003-04)
      ENGLISH ABSTRACT: This thesis investigates the viability of implementing the AX.25 protocol in Java, for satellite applications. The AX.25 protocol forms part of the Communications subsystem of a micro-satellite. It ...
    • Kinodynamic planning for a fixed-wing aircraft in dynamic, cluttered environments : a local planning method using implicitly-defined motion primitives 

      Cowley, Edwe Gerrit (Stellenbosch : Stellenbosch University, 2013-03)
      ENGLISH ABSTRACT: In order to navigate dynamic, cluttered environments safely, fully autonomous Unmanned Aerial Vehicles (UAVs) are required to plan conflict-free trajectories between two states in position-time space ...
    • Kompakte lae-verlies diplekser met gestapte transmissielyn resoneerder 

      Anthonissen, Lukas Willem (Stellenbosch : Stellenbosch University, 1993)
      ENGLISH ABSTRACT: The design of a compact narrowband UHF diplexer involves a complicated network synthesis problem. The complexity of the synthesis problem, in particular the diplexing of two signal paths to achieve a three ...
    • 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 ...
    • Load management of electric water heaters in a smart grid through forecasting and intelligent centralised control 

      Roux, Marcel (Stellenbosch : Stellenbosch University, 2018-03)
      ENGLISH ABSTRACT: Globally utilities are facing increasing demand and numerous challenges arise with the supply and management thereof. The South African electricity utility Eskom is at present still facing difficulty ...
    • Loaded transmission lines illuminated above ground 

      Stuart, Thomas (Stellenbosch : Stellenbosch University, 1999-12)
      ENGLISH ABSTRACT: This thesis provides a solution to an EMC problem that arose from an open cast mining system, which suffered from premature detonation. The industry problem is treated as a generic wiring problem, where ...
    • 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 earth orbit satellite propagators 

      Du Plessis, Jan Abraham Francois (Stellenbosch : Stellenbosch University, 1999-12)
      ENGLISH ABSTRACT: The objective of this study was to implement an orbital propagation algorithm, which could be used for the purpose of mission planning and hardware-in- the-loop simulations for the SUNSAT microsatellite. ...
    • 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. ...
    • Lung health diagnosis through cough sound analysis 

      Botha, Gert Hendrik Renier (Stellenbosch : Stellenbosch University, 2017-03)
      ENGLISH ABSTRACT: This study investigates a simple and easily applied tool for TB screening based on the analysis of cough audio and objective clinical measurements. Tuberculosis is one of the most lethal diseases ...
    • 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 ...