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Browsing Research Articles (Electrical, Electronic & Computer Engineering) by Title

Browsing Research Articles (Electrical, Electronic & Computer Engineering) by Title

Now showing items 1-20 of 109

A 4.3 GHz BiCMOS VCO with multiple 360° variable phase outputs using the vector sum method

Opperman, Tjaart A.K.; Sinha, Saurabh (Springer, 2012-08)

A 4.3 GHz voltage controlled oscillator (VCO) with multiple independently tunable phase outputs is presented. The VCO is realized by coupling two LC oscillators together in order to obtain quadrature signals and is ...
An 8×64 pixel dot matrix microdisplay in 0.35-μm complementary metal-oxide semiconductor technology

Venter, Petrus J.; Du Plessis, Monuko; Bogalecki, Alfons W.; Goosen, Marius E.; Rademeyer, Pieter (Society of Photo-optical Instrumentation Engineers, 2012)

Microdisplay technologies for near-to-eye applications mostly use a complementary metal-oxide semiconductor (CMOS) processing chip as backplane for pixel addressing, with extensive post-processing on top of the CMOS ...
Actor coordination using info-gap decision theory in wireless sensor and actor networks

Chinnappen-Rimer, Suvendi; Hancke, Gerhard P. (Inderscience, 2011)

Mobile, unmanned, power and resource-rich devices, called actors, deployed within a Wireless Sensor Network (WSN) application area, enable faster response times to events. Due to cost constraints, only a few actors can ...
Adaptive synchronization for generalized Lorenz systems

Liang, Xiyin; Zhang, Jiangfeng; Xia, Xiaohua (Institute of Electrical and Electronics Engineers, 2008-08)

In literature it is conjectured that the states of the generalized Lorenz system with an unknown parameter can not be estimated by adaptive observers. In this paper we show that this unknown parameter and the states can ...
Analitiese tegniek om die foneemherkenningsvermoë van Suid-Afrikaanse kogleêre inplantinggebruikers te bepaal

Pretorius, L.L.; Hanekom, J.J. (Johannes Jurgens); Van Wieringen, A.; Wouters, J. (Suid Afrikaanse Akademie vir Wetenskap & Kuns, 2006-12)

This article describes analytical tests developed to investigate the extent to which Afrikaans- and Englishspeaking South African cochlear implant users recognize phonemes. Vowel stimuli (in a /?VOWEL t/ context) and ...
Analysis and design of a wide band omnidirectional antenna

Jacobs, O.B.; Odendaal, J.W. (Johann Wilhelm); Joubert, Johan (Wiley, 2011-06)

The analysis and design of an omni-directional antenna that functions over a very broad frequency band is presented. Design guidelines for this antenna have been derived using electromagnetic analysis software. ...
Analytical approach to design of proportional-to-the-absolute-temperature current sources and temperature sensors based on heterojunction bipolar transistors

Golovins, Eugene; Sinha, Saurabh (Institute of Electrical and Electronics Engineers, 2013-02)

Embedded temperature sensors based on proportional-to-the-absolute-temperature (PTAT) current sources have the potential to lay the foundation for low-cost temperature-aware integrated circuit architectures if they ...
An application of model predictive control to the dynamic economic dispatch of power generation

Xia, Xiaohua; Zhang, Jiangfeng; Elaiw, A.M. (Elsevier, 2011-06)

Two formulations exist for the problem of the optimal power dispatch of generators with ramp rate constraints: the optimal control dynamic dispatch (OCDD) formulation based on control system models, and the dynamic economic ...
Automatic detection of African elephant (Loxodonta africana) infrasonic vocalisations from recordings

Venter, Pieter J.; Hanekom, J.J. (Johannes Jurgens) (Elsevier, 2010-07)

Recordings of elephant vocalisations can be used to determine the size and composition of the herd, the sexual state, as well as the emotional condition of an elephant. Manual analysis of recordings (by listening to these ...
Capacity and outage analysis of MIMO and cooperative communication systems in underground tunnels

Sun, Zhi; Akyildiz, Ian F.; Hancke, Gerhard P. (Institute of Electrical and Electronics Engineers, 2011-11)

In underground mine and road tunnels, multipath fading is much more severe than the terrestrial wireless channels. To overcome the multipath fading in underground tunnels, MIMO (Multiple Input Multiple Output) and ...
Chaos synchronization of the fractional Lü system

Deng, D.H.; Li, C.P. (Elsevier, 2005-08)

Chaos synchronization of the fractional Lü system is theoretically and numerically studied by two methods. The suitable conditions for achieving synchronization of this fractional differential system are derived by using ...
CMOS avalanche electroluminescence applications - microdisplay and high speed data communication

Goosen, Marius E.; Du Plessis, Monuko; Venter, Petrus J.; Bogalecki, Alfons W.; Alberts, A.C.; Rademeyer, Pieter (South African Institute of Electrical Engineers, 2012-03)

All-CMOS silicon light sources, although not the choice semiconductor process for light generation, offer the possibility of large scale manufacturing, integration with digital and driver electronics as well as a wide ...
Comparative performance of OM-OFDM in broadband systems

Dhuness, K.; Maharaj, Bodhaswar Tikanath Jugpershad (Institution of Engineering and Technology, 2012-01)

Please read abstract in the article.
Comparison of two routing metrics in OLSR on a grid based mesh network

Johnson, David; Hancke, Gerhard P. (Elsevier, 2009-03)

Predicting the performance of ad hoc networking protocols for mesh networks has typically been performed by making use of software based simulation tools. Experimental study and validation of such predictions is a vital ...
Consistent haul road condition monitoring by means of vehicle response normalisation with Gaussian processes

Heyns, Theo; De Villiers, J. Pieter; Heyns, P. Stephan (Elsevier, 2012)

Suboptimal haul road management policies such as routine, periodic and urgent maintenance may result in unnecessary cost, both to roads and vehicles. A recent idea is to continually access haul road condition based on ...
CPW-fed cavity-backed slot radiator loaded with an AMC reflector

Joubert, Johan; Vardaxoglou, J.C.; Whittow, W.G.; Odendaal, J.W. (Johann Wilhelm) (Institute of Electrical and Electronics Engineers, 2012-02)

A low profile coplanar waveguide (CPW) fed printed slot antenna is presented with uni-directional radiation properties. The slot antenna radiates above a closely spaced artificial magnetic conducting (AMC) reflector ...
Design and manufacture of quantum-confined SI light sources

Bogalecki, Alfons W.; 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. ...
Design and performance of wideband DRFM for radar test and evaluation

Olivier, K.; Cilliers, J.E.; Du Plessis, Monuko (Institution of Engineering and Technology, 2011-07)

The test and evaluation of modern radars using hardware in the loop simulators requires the use of wideband high-fidelity, digital radio frequency memories (DRFM) in order to generate realistic target returns. Important ...
Design approach to CMOS based Class-E and Class-F power amplifiers

Bozanic, M.; 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 ...
Detecting land cover change using an extended Kalman filter on MODIS NDVI time-series data

Kleynhans, Waldo; Olivier, Jan Corne; Wessels, Konrad J.; Salmon, Brian P.; Van den Bergh, Frans; Steenkamp, Karen C. (Institute of Electrical and Electronics Engineers, 2011-05)

A method for detecting land cover change using NDVI time series data derived from 500m MODIS satellite data is proposed. The algorithm acts as a per pixel change alarm and takes as input the NDVI time series of a 3x3 ...

Now showing items 1-20 of 109

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