Now showing items 39-50 of 50

  • Performance of Predictor Based Link Adaptation Algorithms 

    Wieser, V.; Psenak, V. (Společnost pro radioelektronické inženýrství, 2009-12)
    The presented paper deals with the link adaptation algorithms in mobile radio access networks based on Wideband Code Division Multiple Access (WCDMA). The mobile radio channel has a significant impact on the transmitted ...
  • The Quality Factor of the Folded Cylindrical Helix 

    Best, S. R. (Společnost pro radioelektronické inženýrství, 2009-12)
    Any electrically small antenna can be impedance matched at any single frequency using a number of well known techniques. Once the small antenna is impedance matched, the primary characteristics of interest are its radiation ...
  • A Quantitative Study on Optimum Parameters Selection in Adaptive Unsharp Masking Technique for Infrared Images 

    Jane, O.; Ilk, H. G. (Společnost pro radioelektronické inženýrství, 2009-12)
    Infrared image processing has been the focal point of considerable research activity in the last decade mainly because of its wide application areas in security and defense. With the aid of an existing image enhancement ...
  • Reconfigurable Pico-cell Antenna Array for Indoor Coverage in GSM 900 Band 

    Ivsic, B.; Bonefacic, D.; Bartolic, J. (Společnost pro radioelektronické inženýrství, 2009-12)
    This paper proposes a simple antenna array based on three stacked shorted patches aimed to be used as GSM (900 MHz) indoor base station antenna. Three same linearly polarized stacked patches are set in three orthogonal ...
  • Repeatable Performance Measurements of MIMO Systems in Connected Reverberation Chambers with Controlled Keyhole Effect 

    Orlenius, C.; Andersson, M. (Společnost pro radioelektronické inženýrství, 2009-12)
    A straightforward, fast, and repeatable procedure for measuring the system performance of the antennas in a MIMO system is presented. Due to the use of two connected reverberation chambers, the so called keyhole effect is ...
  • Shielded Micro-Coplanar CRLH TL Zeroth-Order Resonator Antenna: Critical Performance Evaluation 

    Polivka, M.; Vrba, D. (Společnost pro radioelektronické inženýrství, 2009-12)
    The attention of this paper is focused on the four unit cell zeroth-order resonator antenna (ZORA), manufactured on a shielded micro-coplanar composite right/left-handed (CRLH) transmission line structure. The antenna was ...
  • State-of-the-Art System Solutions for Unmanned Underwater Vehicles 

    Yildiz, O.; Yilmaz, A. E.; Gokalp, B. (Společnost pro radioelektronické inženýrství, 2009-12)
    Unmanned Underwater Vehicles (UUVs) have gained popularity for the last decades, especially for the purpose of not risking human life in dangerous operations. On the other hand, underwater environment introduces numerous ...
  • Study of a Miniaturized Quasi-Self-Complementary UWB Antenna in Frequency and Time Domain 

    Guo, L.; Chen, X.; Parini, C. (Společnost pro radioelektronické inženýrství, 2009-12)
    A compact antenna for UWB communication systems has been realized by employing a quasi-selfcomplementary structure together with a triangular notch on microstrip feed line in this paper. The optimal design of this type of ...
  • Traction Permanent Magnet Synchronous Motor Torque Control with Flux Weakening 

    Dolecek, R.; Novak, J.; Cerny, O. (Společnost pro radioelektronické inženýrství, 2009-12)
    The paper deals with analysis of dynamic behavior of a feedback flux weakening control of PMSM traction drive for light vehicles. The PMSM flux weakening is very important for traction drives. Two torque control structures ...
  • Two-Element PIFA Array Structure for Polarization Diversity in UMTS Mobile Phones 

    Ferrero, F.; Diallo, A.; Luxey, C.; Derat, B.; Hamouz, P.; Hazdra, P.; Rahola, J. (Společnost pro radioelektronické inženýrství, 2009-12)
    In this paper, we demonstrate the possibility to strongly modify the radiated fields of a UMTS handset by using a phased two-element PIFA array. The structure is composed of a 100x40 mm2 metallic ground plane acting as the ...
  • An Ultra-Low-Voltage and Ultra-Low-Power 2.4 GHz LNA Design 

    Liu, B.; Wang, C.; Ma, M.; Guo, S. (Společnost pro radioelektronické inženýrství, 2009-12)
    In this paper, ultra-low-voltage and ultra-low-power circuit techniques are presented for CMOS RF front-ends. By employing a modified current-reused architecture, the low-noise amplifier (LNA) can operate at a very low ...
  • Utilization of Birefringent Fiber as Sensor of Temperature Field Disturbance 

    Dvorak, F.; Maschke, J.; Vlcek, C. (Společnost pro radioelektronické inženýrství, 2009-12)
    The paper deals with utilization of induced birefringence sensitivity to temperature field in birefringent optical fibers. The propagating optical wave and optical fibers are described by means of coherency and Jones ...