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Browsing by Author "Vlok, JD"

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Analytic approximation to the largest eigenvalue distribution of a white Wishart matrix

Author: Vlok, JD ; Olivier, JC Date: 14 Aug 2012 Eigenvalue distributions of Wishart matrices are given in the literature as functions or distributions defined in terms of matrix arguments requiring numerical evaluation. As a result the relationship between parameter values and statistics ... Read more
Blind sequence-length estimation of low-SNR cyclostationary sequences

Author: Vlok, JD ; Olivier, JC Date: Jun 2014 Several existing direct-sequence spread spectrum (DSSS) detection and estimation algorithms assume prior knowledge of the symbol period or sequence length, although very few sequence-length estimation techniques are available in the literature. ... Read more
Multi-dimensional super-orthogonal modulation alternative to M-QAM WCDMA for next generation wireless applications

Author: Linde, LP ; Vlok, JD Date: Sep 2007 This paper presents bit-error-rate (BER) performance results of an upwards-expandable Multidimensional super-orthogonal modulation alternative to M-ary quadrature amplitude modulation wideband codedivision-multiple-access (M-QAM WCDMA), ... Read more
Non-cooperative detection of weak spread-spectrum signals in AWGN

Author: Vlok, JD ; Olivier, JC Date: Nov 2012 A semi-blind method based on principal component analysis (PCA) and sequence synchronisation is proposed to detect direct sequence spread-spectrum (DSSS) signals in a noncooperative setting under low signal-to-noise ratio (SNR) conditions. ... Read more
Performance of sparse graph codes on a four-dimensional CDMA System in AWGN and multipath fading

Author: Vlok, JD ; Linde, LP Date: Sep 2007 This paper presents the uncoded and coded multi-user error performance results of a novel super-orthogonal (SO) 4D CDMA communication platform under AWGN and multi-path fading channel conditions. The communication platform employs a special ... Read more

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Browsing by Author "Vlok, JD"

Browsing by Author "Vlok, JD"

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