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Browsing Electrical, Electronic and Computer Engineering by Title
Now showing items 1-20 of 1387
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(Optical Society of America, 2014-09)Visible light from silicon junctions under avalanche breakdown can be used to create microdisplay systems with integrated light sources. Junctions available in standard CMOS usually breaks down at much larger voltages ...
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(Institute of Electrical and Electronics Engineers, 2014-09)A 3-D path-following controller is proposed in this brief for a 6-degrees-of-freedom model-scaled autonomous helicopter. The reference path and path-following errors are newly defined using implicit expressions. On the ...
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(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 ...
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(University of Pretoria, 2009-04-08)This research looks into the design of an integrated in-phase/quadrature (I/Q) VCO operating at 5 GHz. The goal is to design a phase shifter that is implemented at the LO used for RF up conversion. The target application ...
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(Elsevier, 2015-04)This paper presents a six-bit current-steering digital-to-analogue converter (DAC), which optimises the spurious free dynamic range (SFDR) performance of high-speed binary weighted architectures by lowering current switch ...
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An 8×64 pixel dot matrix microdisplay in 0.35-μm complementary metal-oxide semiconductor technology (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 ...
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(University of Pretoria, 2018)Dual-circularly polarized antennas usually consist of a radiating structure and a feed network capable of generating the �90� modes required for dual circular polarization. The problem is that these feed networks often ...
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(University of Pretoria, 2019)The continuously growing number of wireless devices and the demand for wireless local area network (WLAN) coverage received a lot of research and design attention during the past decade. The WLAN application is a popular ...
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(University of Pretoria, 2019)The continuously growing number of wireless devices and the demand for wireless local area network (WLAN) coverage received a lot of research and design attention during the past decade. The WLAN application is a popular ...
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(University of Pretoria, 2017)Multiple drive belt conveyors are being increasingly incorporated in mining plans worldwide because of their high economic performance and the ease of moving these installations around, especially in underground mines. A ...
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(University of Pretoria, 2017)In the mining industry, methods to reduce the fuel consumed in the haulage operations are largely sought as a result of the growing energy demand, fuel cost increases and adverse environmental impacts due to the emission ...
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(University of Pretoria, 2017)The standardisation of the 60 - 80 GHz band by the IEEE802.15.3 task group 3C offers prospects for high speed gigabit wireless applications. This mm-wave band can be used to achieve high data rate transmission in high ...
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(Institute of Electrical and Electronics Engineers, 2021-08)Congestion in dense traf c networks is a prominent obstacle towards realizing the performance requirements of 5G new radio. Since traditional adaptive traf c signal control cannot resolve this type of congestion, realizing ...
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(University of Pretoria, 2011-10-12)Many wireless sensor network (WSN) applications depend on knowing the position of nodes within the network if they are to function efficiently. Location information is used, for example, in item tracking, routing protocols ...
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(Institute of Electrical and Electronics Engineers, 2014)The classic gain-transfer method assumes a uniform plane wave incident over the apertures of the gain-transfer standard (typically a standard-gain horn) as well as the antenna under test. Variations in the incident field ...
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(MDPI Publishing, 2016-06-04)Modern infrastructure, such as dense urban areas and underground tunnels, can effectively block all GPS signals, which implies that effective position triangulation will not be achieved. The main problem that is addressed ...
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(University of Pretoria, 2005-11-01)Speaker accent influences the accuracy of automatic speech recognition (ASR) systems. Knowledge of accent based acoustic variations can therefore be used in the develop¬ment of more robust systems. This project investigates ...
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(University of Pretoria, 2008-08-19)High levels of speech recognition have been obtained with cochlear implant users in quiet conditions. In noisy environments, speech recognition deteriorates considerably, especially in speech-like noise. The aim of this ...
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(University of Pretoria, 2010)Acoustic models are useful tools to increase understanding of cochlear implant perception. Two particular issues in modelling cochlear implant perception were considered in the present study, which aimed at improving ...
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(American Geophysical Union (AGU), 2016-05)Either passive calibration targets are expensive and complex to manufacture or their bistatic RCS levels are significantly lower than the monostatic RCS levels of targets such as spheres, dihedral- and trihedral corner ...
Now showing items 1-20 of 1387