2002/3

 

Recent Submissions

  • 3-D Center-Weighted Vector Directional Filters for Noisy Color Sequences 

    Lukac, R. (Společnost pro radioelektronické inženýrství, 2002-09)
    This paper focuses on a noise filtering in color image sequences, where a new class of center-weighted vector directional filters is provided. According to high dimensionality of color image sequences, where besides the ...

  • Walsh - Hadamard Transformation of a Convolution 

    Usakova, A.; Kotuliakova, J.; Zajac, M. (Společnost pro radioelektronické inženýrství, 2002-09)
    A convolution is mathematical operation used in signal processing, in the homomorphous signal processing and digital image processing (e.g. image interpolation). In regard of computational complexity of the convolution in ...

  • A Comparison of Selected GBN ARQ Schemes for Variable-Error-Rate Channel Using QAM 

    Alexova, P.; Kosut, P.; Polec, J.; Kotuliakova, K. (Společnost pro radioelektronické inženýrství, 2002-09)
    In non-stationary channels, error rates vary considerably. The paper compares Yao's Adaptive Go-back-N (GBN) Automatic-Repeat-Request (ARQ) scheme with Adaptive go-back-N with sliding window mechanism which both estimate ...

  • Design of Planar Reflector Antennas 

    Gona, S.; Raida, Zbyněk (Společnost pro radioelektronické inženýrství, 2002-09)
    A design of single and folded reflector antennas is presented. We focus in the use of an optimization during the design process. In comparison to existing papers, possibility of realization of folded antenna at X band ...

  • Electromagnetic Wave Propagation Modeling Using the Ant Colony Optimization Algorithm 

    Pechač, Pavel (Společnost pro radioelektronické inženýrství, 2002-09)
    The Ant Colony Optimization algorithm - a multi-agent approach to combinatorial optimization problems - is introduced for a simple ray tracing performed on only an ordinary bitmap describing a two-dimensional scenario. ...

  • Use of the Analog Neural Networks in the Adaptive Antenna Control Systems 

    Tobes, Z.; Raida, Zbyněk (Společnost pro radioelektronické inženýrství, 2002-09)
    In the paper, original control system of adaptive antennas, which is based on Kalman filter, is presented and compared with earlier approaches to this problem. The designed control circuit eliminates some disadvantages of ...

  • Investigating the Rossler Attractor Using Lorentz Plot and Lyapunov Exponents 

    Kvarda, P. (Společnost pro radioelektronické inženýrství, 2002-09)
    To investigate the Rossler attractor, introduced in 1976 by O.E. Rossler [3], we used Lorenz plot to show deterministic character and designated the Lyapunov exponent to show the chaotic character of the system.

  • Correctness of Velocity Evaluation of System Using Spatial Filter 

    Prokes, A. (Společnost pro radioelektronické inženýrství, 2002-09)
    In this paper, a velocity measurement method using the spatial filter is presented. Luminous emitance of the surface passing through the moving spatial filter and optical set is projected to the active area of photo-detector. ...

  • Laboratory Equipment Type Fiber Optic Refractometer 

    Turan, J.; Ovsenik, L.; Benca, M.; Carome, E. F. (Společnost pro radioelektronické inženýrství, 2002-09)
    Using fiber optics and micro optics technologies we designed an innovative fiber optic index of refraction transducer that has unique properties. On the base of this transducer a laboratory equipment type fiber optic ...