Now showing items 1-9 of 9

  • Adaptive Goertzel's Algorithm for DFT Computation with Higher Accuracy 

    Levicky, D.; Drutarovsky, M.; Galajda, P.; Kocur, D.; Marchevsky, S. (Společnost pro radioelektronické inženýrství, 1996-04)
    In this paper the adaptive Goertzel's algorithm applied for required DFT coefficient computation in the harmonic analyser is described. This algorithm utilizes effective combination of the synchronous DFT and window method. ...
  • Embedded Platform for Automatic Testing and Optimizing of FPGA Based Cryptographic True Random Number Generators 

    Varchola, M.; Drutarovsky, M. (Společnost pro radioelektronické inženýrství, 2009-12)
    This paper deals with an evaluation platform for cryptographic True Random Number Generators (TRNGs) based on the hardware implementation of statistical tests for FPGAs. It was developed in order to provide an automatic ...
  • GSM Channel Equalization Algorithm - Modern DSP Coprocessor Approach 

    Drutarovsky, M. (Společnost pro radioelektronické inženýrství, 1999-12)
    The paper presents basic equations of efficient GSM Viterbi equalizer algorithm based on approximation of GMSK modulation by linear superposition of amplitude modulated pulses. This approximation allows to use Ungerboeck ...
  • Imaging of the Building Contours with Through the Wall UWB Radar System 

    Aftanas, M.; Drutarovsky, M. (Společnost pro radioelektronické inženýrství, 2009-09)
    Any actual information about a building interior can be very useful before entering a dangerous area. It can be used to plan strategies in many rescue and security applications. The paper deals with imaging of the inner ...
  • The Methods of Design and Implementation of Stack Filters for Image Processing 

    Drutarovsky, M.; Marchevsky, S. (Společnost pro radioelektronické inženýrství, 1995-04)
    This paper deals with a large class of nonlinear digital filters, the stack filters, which contain all combinations and compositions of rank order operators within a finite window. Attention is given to design and effective ...
  • A New Glass of Nonlinear Filters: Microstatistic Volterra Filters 

    Kocur, D.; Drutarovsky, M.; Marchevsky, S. (Společnost pro radioelektronické inženýrství, 1996-04)
    In this paper a new subset of the time-invariant microstatistic filters so-called microstatistic Volterra filters are proposed. This class of nonlinear filters is based on the idea of the conventional microstatistic filter ...
  • Polyphase Order Analysis Based on Convolutional Approach 

    Drutarovsky, M. (Společnost pro radioelektronické inženýrství, 1999-06)
    The condition of rotating machines can be determined by measuring of periodic frequency components in the vibration signal which are directly related to the (typically changing) rotational speed. Classical spectrum analysis ...
  • A Robust Chaos-Based True Random Number Generator Embedded in Reconfigurable Switched-Capacitor Hardware 

    Drutarovsky, M.; Galajda, P. (Společnost pro radioelektronické inženýrství, 2007-09)
    This paper presents a new chaos-based True Random Number Generator (TRNG) with a decreased voltage supply sensitivity. Contrary to the traditionally used sources of randomness it uses a well-defined deterministic ...
  • Testing of PLL-based True Random Number Generator in Changing Working Conditions 

    Simka, M.; Drutarovsky, M.; Fischer, V. (Společnost pro radioelektronické inženýrství, 2011-04)
    Security of cryptographic systems depends significantly on security of secret keys. Unpredictability of the keys is achieved by their generation by True Random Number Generators (TRNGs). In the paper we analyze behavior ...