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Browsing by Author "Du Plessis, WP"

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  • Du Plessis, WP (IEEE, 2011-09)
    The use of the density-taper approach to initialise a genetic algorithm is shown to give excellent results in the synthesis of thinned arrays. This approach is shown to give better SLL values more consistently than using ...
  • Du Plessis, WP; Kitching, C; Bin Ghannam, A (IEEE, 2012-03)
    The effect of allowing shared elements in interleaved thinned arrays is investigated. The sidelobe level (SLL) as a function of the number of shared elements mirrors the SLL of thinned arrays as a function of filling factor ...
  • Du Plessis, WP; Odendaal, JW; Joubert, J (Institute of Electrical and Electronics Engineers (IEEE), 2010-01)
    Experimental measurements that accurately simulate the effect of a retrodirective cross-eye jammer on a monopulse radar are described. The accuracy of a recently published extended analysis of retrodirective crosseye jamming ...
  • Du Plessis, WP; Odendaal, JW; Joubert, J (Institute of Electrical and Electronics Engineering (IEEE), 2009-09)
    An extended and rigorous analysis of retrodirective cross-eye jamming in a radar system scenario is presented. This analysis removes the approximations that limit the validity of other analyses of cross-eye jamming. These ...
  • Du Plessis, WP; Potgieter, PF; Gouws, M; Malan, E (IEEE, 2011-04)
    The agile bandwidths of modern radars mean that Electronic Support (ES) receivers require wide instantaneous bandwidths leading to high data rates. Compressive sensing is shown to be a promising technique for reducing data ...
  • Du Plessis, WP (Wiley-Blackwell, 2009-10)
    A new synthesis procedure for interdigital filters with shorted-pin feeds is developed by relating the coupling factors and external Qs to the physical structure of the filter. This new procedure is easily understood and ...
  • Van der Merwe, JR; Malan, J; Maasdorp, FDV; Du Plessis, WP (Instituto Tecnológico de Aeronáutica (ITA), 2014-09)
    Multi-channel software-defined radios (SDRs) can be utilised as inexpensive prototyping platforms for transceiver arrays. The application for multi-channel prototyping is discussed and measured results of coherent channels ...
  • Du Plessis, WP (IEEE, 2012-01)
    The effect of platform skin return on retrodirective cross-eye jamming is analysed, allowing the parameters of a cross-eye jammer in the presence of skin return to be determined. The inherently unknown phase of the platform ...
  • Du Plessis, WP; Odendaal, JW; Joubert, J (Institute of Electrical and Electronics Engineers (IEEE), 2010-01)
    The matching required between the two directions through a retrodirective cross-eye jammer is considered using both the traditional phase-front analysis and an extended analysis. The design parameters to achieve a specified ...
  • Maasdorp, FDV; Du Plessis, WP (Mindsystems Pty Ltd., 2012-11)
    In recent years, a discussion on the relationship between Electronic Warfare (EW), Information Warfare (IW), Cyber Operations, Net-Centric Warfare, Command and Control, Information Operations (IO) and other constructs have ...
  • Du Plessis, WP (IEEE, 2011-09)
    A version of the iterative Fourier technique (IFT) for the design of thinned antenna arrays with weighted elements is presented. The structure of the algorithm means that it is well suited to the design of weighted thinned ...