• The impact of accent identification errors on speech recognition of South African English 

      Kamper, Herman; Niesler, Thomas R. (Academy of Science of South Africa, 2014)
      For successful deployment, a South African English speech recognition system must be capable of processing the prevalent accents in this variety of English. Previous work dealing with the different accents of South African ...
    • An efficient beam steerable antenna array concept for airborne applications 

      Aliakbarian, Hadi; Van der Westhuizen, Ewald; Wiid, Riaan; Volskiy, Vladimir; Wolhuter, Riaan; Vandenbosch, Guy A. E. (Radioengineering Society, 2014)
      Deployment of a satellite borne, steerable antenna array with higher directivity and gain in Low Earth Orbit makes sense to reduce ground station complexity and cost, while still maintaining a reasonable link budget. The ...
    • Constant radiation characteristics for log-periodic dipole array antennas 

      Lehmensiek, Robert; De Villiers, Dirk I. L. (Institute of Electrical and Electronics Engineers, 2014)
      Given the correct terminal voltages on each element of a log-periodic dipole array constant radiation characteristics can be achieved for an omni-directional radiation pattern. In this communication it is shown that this ...
    • Compact conical line power combiner design using circuit models 

      Beyers, Ryno D.; De Villiers, Dirk I. L. (Institute of Electrical and Electronics Engineers, 2014)
      ENGLISH ABSTRACT: A simple equivalent circuit model with empirical equations describing the peripheral feeding ports of conical line power combiners is presented. The model allows the entire structure to be designed using ...