Browsing Faculty of Engineering by Author "12363626 - Helberg, Albertus Stephanus Jacobus"
Now showing items 1-20 of 22
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An approach to improve the match-on-card fingerprint authentication system security
Nair, Kishor Krishnan; Helberg, Albert; Van der Merwe, Johannes (IEEE, 2016)The combination of smart cards and biometrics results in a strong 2-factor authentication. It facilitates a trusted credential for authenticating an individual's identity through one-to-one biometric verification using the ... -
A comparison of clustering algorithms for automatic modulation classification
Mouton, Jacques P.; Ferreira, Melvin; Helberg, Albertus S.J. (Elsevier, 2020)In this paper, the k-means, k-medoids, fuzzy c-means, Density-Based Spatial Clustering of Applications with Noise (DBSCAN), Ordering Points To Identify the Clustering Structure (OPTICS), and hierarchical clustering algorithms ... -
A comparison of wireless node topologies for network coding using practical path-loss models
Böning, F.J.; Helberg, A.S.J.; Grobler, M.J. (IEEE, 2010)In this paper, we discuss the physical arrangement of wireless nodes to form topologies suitable for the implementation of Network Coding. Boundaries for the most favorable placement of the nodes to form Bow-Tie and Butterfly ... -
Data acquisition system for capturing dynamic transients in a control valve
Helling, Arnold; Van Schoor, George; Helberg, Albert S.J. (IEEE, 2004)This work presents the development of a data acquisition (DAQ) system to be used in conjunction with fuzzy modelling to derive a dynamic mathematical model of a control valve. Characterising the behaviour of a control valve ... -
Efficient packet erasure decoding by transforming the systematic generator matrix of an RS code
Versfeld, D.J.J.; Helberg, A.S.J.; Ferreira, H.C. (IEEE, 2008)We consider the erasures-only decoding of Reed-Solomon codes. One class of erasure decoders of algebraic codes can be viewed as a transformation of the systematic generator matrix, as first noticed by Berlekamp. We extend ... -
Error correction with the implicit encoding capability of random network coding
Von Solms, Suné; Grobler, Magdalena J.; Helberg, Albert S.J. (Springer, 2010)In this paper, we present a technique for a network error correcting code using Random Network Coding. We introduce a novel error correction scheme that uses the implicit encoding capability of Random Network Coding. This ... -
An evaluation of configuration parameters affecting network coding on the data link layer in a wireless network
Van Wyk, J.L.; Helberg, A.S.J.; Grobler, M.J. (IEEE, 2011)Network Coding, introduced in [2], promises significant theoretical capacity gains in multicast networks. Practical implementations in underlay networks are however quite complex in practice and performance is subject to ... -
Evaluation of the wideband compressive radio receiver for spectrum sensing
De Wet, Sarel J.; Helberg, Albert S.J. (IEEE, 2011)We present an empirical evaluation of the carrier detection method used in the Wideband Compressive Radio Receiver (WCRR), which is of particular interest for spectrum sensing in Cognitive Radio (CR) and Dynamic Spectrum ... -
Fault detection and characterisation in pressurised water reactors using real-time simulations
Cilliers, A.C.; Nicholls, D.; Helberg, A.S.J. (Elsevier, 2011)The use of real-time plant simulators running in parallel with a nuclear plant to predict the control system behaviour and highlighting unexpected plant behaviour is presented. The study is performed on a 910 MW Generation ... -
Fingerprint matching on smart card: a review
Baruni, Kedimotse; Helberg, Albert; Nair, Kishor (IEEE, 2017)Fingerprint Match-on-Card (MoC) offers the highest degree of privacy and security to cardholders as the fingerprint never leaves the secure environment of a smart card. The level of security of a biometric system is evaluated ... -
Improving QoS for real-time multimedia traffic in ad-hoc networks with delay aware multi-path routing
Boshoff, J.N.; Helberg, A.S.J. (IEEE, 2008)A Mobile Ad-hoc Network (MANET) is a wireless network in which nodes, in the absence of fixed access points, communicate via single or multi-hop paths. Each node in a MANET should thus be able to perform necessary routing ... -
Introducing XGL: a lexicalised probabilistic graphical lemmatiser for isiXhosa
Mzamo, Lulamile; Helberg, Albert; Bosch, Sonja (IEEE, 2015)In this paper, a lexicalized probabilistic graphical lemmatiser for isiXhosa, XGL, is presented. An overview of isiXhosa lemmatisation issues is given, followed by a discussion on previous work in automated lemmatisation ... -
Intrusion detection in Bluetooth enabled mobile phones
Nair, Kishor Krishnan; Helberg, Albert; Van der Merwe, Johan (IEEE, 2015)Bluetooth plays a major role in expanding global spread of wireless technology. This predominantly happens through Bluetooth enabled mobile phones, which cover almost 60% of the Bluetooth market. Although Bluetooth mobile ... -
The intuitive approach to engineering design of a multi-cultural group of engineering students
Grobler, M.J.; Helberg, Albert S.J. (IEEE, 2011)We all acknowledge the importance of design in the world of an engineer, and much effort goes into teaching the best practices to our students. We however seldom examine what their intuitive approach to engineering design ... -
An investigation into the use of the kriging for Wi-Fi RSSI estimation in complex indoor environments
Joubert, P.J.; Helberg, A.S.J. (IEEE, 2015)Kriging was originally developed for geographical interpolation purposes, but has proven to be a powerful tool in many other applications as well. In this study we evaluate kriging for Wi-Fi signal strength estimation in ... -
Modified earliest decoding for random network codes
Von Solms, Suné; Helberg, Albert S.J. (IEEE, 2011)We present a practical, modified version of earliest decoding for random linear network coding networks. This decoding method has a lower complexity and decoding delay than traditional Gaussian elimination decoding schemes -
Modified earliest decoding in networks that implement random linear network coding
Von Solms, S.; Helberg, A.S.J. (IEEE, 2012)In this paper we present a formalised description of Modified Earliest Decoding. We simulate the performance of the method in comparison with Earliest Decoding in networks that implement random linear network coding. We ... -
On systematic generator matrices for Reed-Solomon codes
Versfeld, Daniel J.J.; Helberg, Albert S.J.; Ridley, James N.; Ferreira, Hendrik C. (IEEE, 2010)We derive a simple formula to generate a wide-sense systematic generator matrix B for a Reed-Solomon code. Specifically, we generate the generator matrix B such that the columns with indices ¿ 1 , ¿ 2 ,..., ¿ k are the ... -
The performance of feature-based classification of digital modulations under varying SNR and fading channel conditions
Uys, L.Y.; Helberg, A.S.J.; Gouws, M.; Strydom, J.J. (IEEE, 2017)Feature-based classification is a method used for automatic modulation classification of communication signals. This method requires extraction of various features from a signal. One of the approaches for feature extraction ... -
Regenerator for Varshamov-tenengolts-like synchronisation error correcting codes
Pienaar, Jacques A.; Helberg, A.S.J. (IEEE, 2008)Synchronisation errors, that is, the insertion of additional or deletion of valid symbols, are the most difficult class of errors to correct - containing the class of additive errors as a subset. A regenerating algorithm, ...