Now showing items 6-11 of 11

  • Generation of the Narrow Band Digital Modulated Signals Using Quadrature Digital Upconverter 

    Kovar, P. (Společnost pro radioelektronické inženýrství, 2003-04)
    The paper deals with the modern approach to generation of digital modulated signals at intermediate frequency in digital way. The common digital modulator is based on analogue Quadrature modulator. The modern VLSI integrated ...
  • New Second-Order Optimized Filter Design 

    Pospisil, J.; Kolka, Zdeněk; Hanus, S.; Dostal, T.; Brzobohaty, J. (Společnost pro radioelektronické inženýrství, 2003-04)
    Starting from the piecewise-linear (PWL) autonomous dynamical system optimized from the eigenvalue sensitivities viewpoint the corresponding optimized non-autonomous linear (single-input single-output) system is derived. ...
  • Optimized State Model of Piecewise-Linear Dynamical Systems 

    Pospisil, J.; Kolka, Zdeněk; Hanus, S.; Michalek, V.; Brzobohaty, J. (Společnost pro radioelektronické inženýrství, 2003-04)
    The conditions for an optimized design of the second dynamical system having low eigenvalue sensitivities are directly derived. Their more general form is in accordance with the previous results obtained by using linear ...
  • Refractive Index Measurement at TV Tower Prague 

    Grabner, M.; Kvicera, V. (Společnost pro radioelektronické inženýrství, 2003-04)
    Propagation related parameters are used for design and frequency planning of microwave networks. Atmospheric refractive index is the important parameter that influences the propagation of electromagnetic waves during ...
  • Resistively Loaded Dipole Characteristics 

    Hajach, P.; Hartansky, R. (Společnost pro radioelektronické inženýrství, 2003-04)
    Resistively loaded dipole is very often used to measuring the electromagnetic field in EMC testing. The dipole is a traveling wave antenna, where its resonance is eliminated. The paper includes the computation of the current ...
  • Site Diversity Gain Estimated from Rain Rate Records 

    Fiser, O. (Společnost pro radioelektronické inženýrství, 2003-04)
    The site diversity is used to mitigate the rain attenuation on satellite links. The attenuation is estimated through the rain rate-rain attenuation conversion based on the Assis-Einloft physical model in this study. Through ...