• 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 ...
  • 3D-Spiral Small Antenna Design and Realization for Biomedical Telemetry in the MICS band 

    Abadia, J.; Merli, F.; Zurcher, J.; Mosig, J. R.; Skrivervik, A. K. (Společnost pro radioelektronické inženýrství, 2009-12)
    This work presents the design and realization procedure of small implantable antenna for biotelemetry applications. The radiator occupies a volume smaller than 3 cm3 (without its biocompatible insulation), is well matched ...
  • A Compact Wideband Two-Arm-Antenna for Mobile Phones 

    Guan, N.; Ito, K. (Společnost pro radioelektronické inženýrství, 2009-12)
    A compact film type antenna capable of generating two wide resonant modes for covering the AMPS/GSM bands and the DCS/PCS/UMTS bands for mobile phones is proposed. The antenna consists of two superimposed radiation arms ...
  • Enhanced Receivers for Interference Cancellation in 3G Systems 

    Kejik, P.; Hanus, S. (Společnost pro radioelektronické inženýrství, 2009-12)
    Interference cancellation and multiuser detection in CDMA systems are still actual research topics. These techniques enable us to deal with interference and to increase system capacity. In this paper, a so-called Generalized ...
  • 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 ...
  • A Novel Comb-Pilot Transform Domain Frequency Diversity Channel Estimation for OFDM System 

    Liu, L.; Tao, C.; Qiu, J.; Qi, X. (Společnost pro radioelektronické inženýrství, 2009-12)
    Due to implementation complexity, the transform domain channel estimation based on training symbols or comb-type pilots has been paid more attention because of its efficient algorithm FFT/IFFT. However, in a comb-type OFDM ...
  • Explicit-Current-Output Quadrature Oscillator Using Second-Generation Current Conveyor Transconductance Amplifier 

    Lahiri, A. (Společnost pro radioelektronické inženýrství, 2009-12)
    This paper presents a novel quadrature sinusoidal oscillator using second-generation current conveyor transconductance amplifier as an active building block. The proposed circuit employs only a single second-generation ...
  • A Novel 2.4GHz CMOS Up-Conversion Current-Mode Mixer 

    Wan, Q.; Wang, C.; Ma, M. (Společnost pro radioelektronické inženýrství, 2009-12)
    In this paper, a low-power up-conversion current-mode mixer, designed in the chartered 0.18-μm RFCMOS technology, is proposed to realize the transmitter front-end in the frequency band of 2.4 GHz. The proposed mixer can ...
  • 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 ...
  • High-Order Current-Mode and Transimpedance-Mode Universal Filters with Multiple-Inputs and Two-Outputs Using MOCCIIs 

    Horng, J. (Společnost pro radioelektronické inženýrství, 2009-12)
    A high-order current-mode and transimpedance-mode universal filter with multiple-inputs and two-outputs based on multiple output second-generation current conveyors (MOCCIIs) is introduced. By choosing the input current ...
  • 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 ...
  • Dual Band a-Si:H Solar-Slot Antenna for 2.4/5.2GHz WLAN Applications 

    Shynu, S. V.; Roo-Ons, M. J.; Ammann, M. J.; Norton, B. (Společnost pro radioelektronické inženýrství, 2009-12)
    A simple and compact design of solar-slot antenna for dual band 2.4/5.2GHz wireless local area networks (WLAN) applications is proposed. The design employs amorphous silicon (a-Si:H) solar cells in polyimide substrate with ...
  • Analysis of Periodic Errors for Synthesized-Reference-Wave Holography 

    Pidanic, J.; Schejbal, V.; Cermak, D. (Společnost pro radioelektronické inženýrství, 2009-12)
    Synthesized-reference-wave holographic techniques offer relatively simple and cost-effective measurement of antenna radiation characteristics and reconstruction of complex aperture fields using near-field intensity-pattern ...
  • 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 ...
  • 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 ...
  • Analyses of Real Email Traffic Properties 

    Malinka, K.; Hanacek, P.; Cvrcek, D. (Společnost pro radioelektronické inženýrství, 2009-12)
    In this paper, we perform an empirical analysis of email traffic logs obtained from a large university to better understand its impact on the effectiveness and efficiency of anonymous mix remailers. We analyzed data ...
  • Antenna-User Interaction in MIMO-Enabled Laptops 

    Guterman, J.; Moreira, A.; Peixeiro, C.; Rahmat-Samii, Y. (Společnost pro radioelektronické inženýrství, 2009-12)
    The operation of wireless personal communication terminals very close to the user inherently faces the problem of electromagnetic (EM) coupling between the device and the biological tissues. In this paper the effects of ...
  • Fast Keyword Spotting in Telephone Speech 

    Nouza, J.; Silovsky, J. (Společnost pro radioelektronické inženýrství, 2009-12)
    In the paper, we present a system designed for detecting keywords in telephone speech. We focus not only on achieving high accuracy but also on very short processing time. The keyword spotting system can run in three modes: ...
  • Audio Surveillance through Known Event Classification 

    Grezl, F.; Cernocky, J. (Společnost pro radioelektronické inženýrství, 2009-12)
    The way of audio surveillance through known event classification is presented introducing simple yet efficient framework. The use of the proposed system for unknown event detection is also suggested and evaluated. Further, ...
  • 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 ...