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Browsing Electrical, Electronic and Computer Engineering by Author "Olivier, Jan Corne"
Now showing items 1-15 of 15
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Kleynhans, Waldo; Olivier, Jan Corne; Wessels, K.J. (Konrad); Salmon, Brian Paxton; 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 ...
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Wu, Jingxian; Leong, Sang-Yick; Lee, Kah-Ping; Xiao, Chengshan; Olivier, Jan Corne (Institute of Electrical and Electronics Engineers, 2008-01)Turbo equalization improves communication system performance by iteratively exchanging information between soft-input soft-output (SISO) equalizer and SISO channel decoder. The trellis-based maximum a posteriori robability ...
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Improving land cover class separation using an extended Kalman filter on MODIS NDVI time-series data Kleynhans, Waldo; Olivier, Jan Corne; Wessels, K.J. (Konrad); Van den Bergh, Frans; Salmon, Brian Paxton; Steenkamp, Karen C. (Institute of Electrical and Electronics Engineers, 2009)It is proposed that the normalized difference vegetation index time series derived from Moderate Resolution Imaging Spectroradiometer satellite data can be modeled as a triply (mean, phase, and amplitude) modulated cosine ...
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Grobler, Trienko Lups; Ackermann, Etienne Rudolph; Van Zyl, A.J.; Olivier, Jan Corne; Kleynhans, Waldo; Salmon, Brian Paxton (Institute of Electrical and Electronics Engineers, 2013-05)In this paper, a first order MODIS time series simulator, which uses a Colored Simple Harmonic Oscillator, is proposed. The simulated data can be used to augment data sets so that data intensive classification and change ...
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Kleynhans, Waldo; Salmon, Brian Paxton; Olivier, Jan Corne; Van den Bergh, Frans; Wessels, K.J. (Konrad); Grobler, Trienko Lups; Steenkamp, Karen C. (Institute of Electrical and Electronics Engineers, 2012)Human settlement expansion is one of the most pervasive forms of land cover change in the Gauteng province of South Africa. A method for detecting new settlement developments in areas that are typically covered by natural ...
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Grobler, Trienko Lups; Ackermann, Etienne Rudolph; Olivier, Jan Corne; Van Zyl, A.J. (Gusti); Kleynhans, Waldo (Institute of Electrical and Electronics Engineers, 2012-06)It is proposed that the time series extracted from moderate resolution imaging spectroradiometer satellite data be modeled as a simple harmonic oscillator with additive colored noise. The colored noise is modeled with ...
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Myburgh, Hermanus Carel; Olivier, Jan Corne (Hindawi Publishing Corporation, 2013-02-08)In this article, it is proposed that a Hopfield neural network (HNN) can be used to jointly equalize and decode information transmitted over a highly dispersive Rayleigh fading multipath channel. It is shown that a HNN ...
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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 ...
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Salmon, Brian Paxton; Kleynhans, Waldo; Van den Bergh, Frans; Olivier, Jan Corne; Marais, W.J.; Grobler, Trienko Lups; Wessels, K.J. (Konrad) (IEEE / Institute of Electrical and Electronics Engineers Incorporated, 2014-08)The extraction of information on land cover classes using unsupervised methods has always been of relevance to the remote sensing community. In this paper, a novel criterion is proposed, which extracts the inherent ...
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Olivier, Jan Corne; Myburgh, Hermanus Carel (Hindawi Publishing Corporation, 2013-04-15)In this article, a general model for non-iterative joint equalization and decoding is systematically derived for use in systems transmitting convolutionally encoded BPSK-modulated information through a multipath channel, ...
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Kleynhans, Waldo; Salmon, Brian Paxton; Wessels, K.J. (Konrad); Olivier, Jan Corne (Elsevier, 2015-08)Recent development has identified the benefits of using hyper-temporal satellite time series data for land cover change detection and classification in South Africa. In particular, the monitoring of human settlement expansion ...
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Myburgh, Hermanus Carel; Olivier, Jan Corne; Van Zyl, A.J. (Gusti) (Hindawi Publishing Corporation, 2012-07-09)It is proposed that a dynamic Bayesian network (DBN) is used to perform turbo equalization in a system transmitting information over a Rayleigh fading multipath channel. The DBN turbo equalizer (DBN-TE) is modeled on a ...
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Salmon, Brian Paxton; Olivier, Jan Corne; Wessels, K.J. (Konrad); Kleynhans, Waldo; Van den Bergh, Frans; Steenkamp, Karen C. (Institute of Electrical and Electronics Engineers, 2011-06)An automated land cover change detection method is proposed that uses coarse spatial resolution hyper-temporal earth observation satellite time series data. The study compared three different unsupervised clustering ...
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Salmon, Brian Paxton; Olivier, Jan Corne; Kleynhans, Waldo; Wessels, K.J. (Konrad); Van den Bergh, Frans; Steenkamp, Karen C. (Elsevier, 2011-12)This paper presents a novel land cover change detection method that employs a sliding window over hyper-temporal multi-spectral images acquired from the 7 bands of the MODerate-resolution Imaging Spectroradiometer (MODIS) ...
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Grobler, Trienko Lups; Ackermann, Etienne Rudolph; Van Zyl, A.J.; Olivier, Jan Corne; Kleynhans, Waldo; Salmon, Brian Paxton (Institute of Electrical and Electronics Engineers, 2013-03)Human settlement expansion is one of the most pervasive forms of land cover change in South Africa. The use of Page’s Cumulative Sum Test is proposed as a method to detect new settlement developments in areas that were ...
Now showing items 1-15 of 15