Now showing items 1-20 of 50

  • Comparison of Pilot Symbol Embedded Channel Estimation Algorithms 

    Kadlec, P.; Kejik, P.; Raida, Zbyněk (Společnost pro radioelektronické inženýrství, 2009-12)
    In the paper, algorithms of the pilot symbol embedded channel estimation are compared. Attention is turned to the Least Square (LS) channel estimation and the Sliding Correlator (SC) algorithm. Both algorithms are implemented ...
  • Derivation of Criterion Suitable for Evaluation of Multichannel Noise Reduction Systems for Speech Processing 

    Bolom, V.; Ingerle, J.; Sovka, Pavel (Společnost pro radioelektronické inženýrství, 2009-12)
    This paper deals with the theoretical derivation of the Noise Reduction criterion suitable for evaluation of multichannel noise reduction system performance. This criterion is suitable for noise suppression assessment and ...
  • Dual Band High Efficiency Power Amplifier Based on CRLH Lines 

    Jimenez-Martin, J. L.; Gonzalez-Posadas, V.; Arques, F. J.; Garcia-Munoz, L. E.; Segovia-Vargas, D. (Společnost pro radioelektronické inženýrství, 2009-12)
    In this paper we propose the use of Composite Right/Left Hand (CRLH) and Extended Composite Right/Left Hand (ECRLH) transmission lines for the design of dual band high efficiency power amplifiers working in CE class. The ...
  • 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 ...
  • Equivalent Circuit Model for Designing of Jerusalem Cross-Based Artificial Magnetic Conductors 

    Hosseinipanah, M.; Wu, Q. (Společnost pro radioelektronické inženýrství, 2009-12)
    This paper introduces an equivalent circuit model to estimate the resonant frequency and reflection phase of Jerusalem cross-based artificial magnetic conductor (JC-AMC) structures for waves normally incident on the ...
  • 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 ...
  • 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 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 ...
  • EMC Specific Problems of Frequency Converters Used at Interlocking Device 

    Novak, J.; Dolecek, R.; Cerny, O. (Společnost pro radioelektronické inženýrství, 2009-12)
    The paper deals with problems of electromagnetic compatibility (EMC) of frequency control drive of electromotive switch actuator of railway switch. The frequency converter with Pulse Width Modulation (PWM) and the output ...
  • 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 ...
  • A General Model of the Atmospheric Scattering in the Wavelength Interval 300 - 1100nm 

    Ferdinandov, E.; Dimitrov, K.; Dandarov, A.; Bakalski, I. (Společnost pro radioelektronické inženýrství, 2009-12)
    We have presented and developed new theoretic-empirical models of the extinction coefficients of the molecular scattering in the lower, close to the ground troposphere. We have included the indicatrices of backscattering. ...
  • Multilateral Interoperability Programme 

    Burita, L. (Společnost pro radioelektronické inženýrství, 2009-12)
    The Multilateral Interoperability Programme (MIP) is a voluntary and independent activity in NATO environment by the participating nations and organizations. The MIP concept is based on data exchange in form of common ...
  • 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 ...
  • Axial Vircator for Electronic Warfare Applications 

    Drazan, L.; Vrana, R. (Společnost pro radioelektronické inženýrství, 2009-12)
    This paper deals with a high power microwave generator with virtual cathode – vircator in axial release for electronic warfare applications. The classification of directed energy weapons microwave (DEWM) is introduced ...
  • 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: ...
  • 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 ...
  • Maximum Available Accuracy of FM-CW Radars 

    Ricny, V. (Společnost pro radioelektronické inženýrství, 2009-12)
    This article deals with the principles and above all with the maximum available measuring accuracy analyse of FM-CW (Frequency Modulated Continuous Wave) radars, which are usually employed for distance and velocity ...