Browsing Research Articles (Electrical, Electronic and Computer Engineering) by Issue Date

Browsing Research Articles (Electrical, Electronic and Computer Engineering) by Issue Date

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  • Modelling of a spatially correlated MIMO wireless channel 
    Varghese, B.B.; Maharaj, Bodhaswar Tikanath Jugpershad (South African Institute of Electrical Engineers, 2009-03)
    The channel capacity of a wireless communication system is greatly increased with the usage of multiple antennas at both the transmitter and receiver as long as the environment provides sufficient scattering. This paper ...
  • Economic performance assessment of two ROM ore milling circuit controllers 
    Wei, Donghui; Craig, Ian Keith (Elsevier, 2009-04)
    Economic performance assessment of control systems is receiving increasing attention in both academia and industry. A relevant framework is proposed in Bauer and Craig (Bauer, M., Craig, I.K., 2008. Economic assessment of ...
  • Efficient optimisation of a vehicle suspension system, using a gradient-based approximation method. Part 1. Mathematical modelling 
    Thoresson, Michael John; Uys, Petro E.; Els, Pieter Schalk; Snyman, Jan A. (Elsevier, 2009-05-12)
    Part 1 of this paper proposed a methodology for the efficient determination of gradient information, when optimising a vehicle’s suspension characteristics for ride comfort and handling. The non-linear full vehicle model, ...
  • Efficient optimisation of a vehicle suspension system, using a gradient-based approximation method. Part 2. Optimisation results 
    Thoresson, Michael John; Uys, Petro E.; Els, Pieter Schalk; Snyman, Jan A. (Elsevier, 2009-05-12)
    A methodology is proposed for the efficient determination of gradient information, when performing gradient based optimisation of an off-road vehicle’s suspension system. The methodology is applied to a computationally ...
  • Efficient management of clock drift in preamble sampling mac protocols for wireless sensor networks 
    Tonsing, Christoph Erik; Hancke, Gerhard P. (South African Institute of Electrical Engineers, 2009-06)
    In this paper, the design of an energy-efficient Medium Access Control (MAC) protocol for low traffic Wireless Sensor Networks (WSNs) is presented. The protocol, Dynamic Preamble Sampling MAC (DPS-MAC), is based on the ...
  • Design approach to CMOS based Class-E and Class-F power amplifiers 
    Bozanic, Mladen; Sinha, Saurabh (South African Institute of Electrical Engineers, 2009-09)
    This paper presents the design flow for an integrated power amplifier. The flow is presented as a software routine. For a given set of amplifier specifications and CMOS process parameters, the routine computes the passive ...
  • Mathematical modelling of the LC-Ladder and capacitive shunt-shunt feedback LNA topology 
    Weststrate, Marnus; Sinha, Saurabh (South African Institute of Electrical Engineers, 2009-09)
    In this paper a new low noise amplifier configuration is proposed to achieve wideband operation. This configuration consists of an LC-ladder filter and a common-emitter stage employing shunt-shunt capacitive feedback to ...
  • Extended analysis of retrodirective cross-eye jamming 
    Du Plessis, W.P. (Warren Paul); Odendaal, J.W. (Johann Wilhelm); Joubert, Johan (Institute of Electrical and Electronics Engineers, 2009-09)
    An extended and rigorous analysis of retrodirective cross-eye jamming in a radar system scenario is presented. This analysis removes the approximations that limit the validity of other analyses of cross-eye jamming. These ...
  • Industrial wireless sensor networks : challenges, design principles, and technical approaches 
    Gungor, Vehbi Cagri; Hancke, Gerhard P. (Institute of Electrical and Electronics Engineers, 2009-10)
    In today’s competitive industry marketplace, the companies face growing demands to improve process efficiencies, comply with environmental regulations, and meet corporate financial objectives. Given the increasing age of ...
  • Guest editorial 
    Neumann, Peter; Rauchhaupt, Lutz; Hancke, Gerhard P. (Institute of Electrical and Electronics Engineers, 2009-10)
    Heterogeneous networks, frequently consisting of (partially homogeneous) local and wide-area systems, as well as wired and wireless communication systems, will become increasingly important. Future scenarios of ...
  • Low complexity MLSE equalization in highly dispersive Rayleigh fading channels 
    Myburgh, Hermanus Carel; Olivier, Jan Corne (Hindawi Publishing Corporation, 2010)
    A soft output low complexity maximum likelihood sequence estimation (MLSE) equalizer is proposed to equalizeM-QAM signals in systems with extremely long memory. The computational complexity of the proposed equalizer is ...
  • Realization of multivariable nonlinear systems via the approaches of differential forms and differential algebra 
    Zhang, Jiangfeng; Moog, Claude H.; Xia, Xiaohua (Institute of Information Theory and Automation of Academy of Sciences of the Czech Republic, 2010)
    In this paper differential forms and differential algebra are applied to give a new definition of realization for multivariable nonlinear systems consistent with the linear realization theory. Criteria for the existence ...
  • Robust nonlinear model predictive control of a run-of-mine ore milling circuit 
    Coetzee, Loutjie C.; Craig, Ian Keith; Kerrigan, Eric C. (Institute of Electrical and Electronics Engineers, 2010-01)
    This brief investigates the feasibility of applying a robust nonlinear model predictive controller to a run-of-mine ore milling circuit, and the conditions under which such a controller might be worthwhile implementing. ...
  • Feasibility of optical clock distribution for future CMOS technology nodes 
    Venter, Petrus Johannes; Du Plessis, Monuko (South African Institute of Electrical Engineers, 2010-03)
    CMOS is arguably the most successful semiconductor technology in electronics history. This is clear by the constant efforts involved in scaling as the key driver of improving the performance of ICs to keep up with consumer ...
  • A fully CMOS optical transmission system based on light emitting avalance diodes 
    Ellinghaus, P.; Venter, Petrus Johannes; Du Plessis, Monuko; Rademeyer, Pieter; Bogalecki, Alfons Willi (South African Institute of Electrical Engineers, 2010-03)
    The successful realization of optical interconnects for inter- and intra-chip communication strongly depends on the use of a light source that is compatible with existing, well established manufacturing processes – primarily ...
  • Design and manufacture of quantum-confined SI light sources 
    Bogalecki, Alfons Willi; Du Plessis, Monuko (South African Institute of Electrical Engineers, 2010-03)
    To investigate quantum confinement effects on silicon (Si) light source electroluminescence (EL), nanometre-scale Si finger junctions were manufactured in a fully customized silicon-on-insulator (SOI) production technology. ...
  • Novel electroluminescence technique to analyze mixed reverse breakdown phenomena in silicon diodes 
    Du Plessis, Monuko; Rademeyer, Pieter (Elsevier, 2010-04)
    In this paper a novel technique to analyze the low-voltage breakdown regime of silicon diodes is presented. It is shown that the field emission tunnel current component of the reverse current does not cause energy transitions ...
  • A reduced complexity soft-input soft-output MIMO detector combining a sphere decoder with a Hopfield network 
    Louw, Daniel J.; Botha, P.R. (Philippus Rudolph); Maharaj, Bodhaswar Tikanath Jugpershad (Institute of Electrical and Electronics Engineers, 2010-04)
    In this paper, a reduced complexity soft-input soft-output MIMO detector is presented. The detector is intended to be used in conjunction with an error correction code. The detector combines a Sphere Decoder with a Hopfield ...
  • Double resonant stub bandstop filter with pseudo-elliptic response 
    Malherbe, J.A.G., 1940-; Reid, C.A. (Institution of Engineering and Technology, 2010-04)
    A simple wideband bandstop filter that yields equal ripples in both the pass and stop bands, is described. The filter comprises only of two resonant stubs and a connecting transmission line and has a transmission response ...
  • The development of dynamic models for a dense medium separation circuit in coal beneficiation 
    Meyer, Ewald Jonathan; Craig, Ian Keith (Elsevier, 2010-05)
    Often the most difficult step in establishing a control system is the development of a suitable dynamic process model. As such a model is not available elsewhere, a first principle dynamic mathematical model was developed ...