2009/4

 

Recent Submissions

  • 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 ...

  • Fast Keyword Spotting in Telephone Speech 

    Nouza, Jan; Silovsky, Jan (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: ...

  • An Ultra-Low-Voltage and Ultra-Low-Power 2.4 GHz LNA Design 

    Liu, Baimei; Wang, Chunhua; Ma, Minglin; Guo, Shengqiang (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 ...

  • Audio Surveillance through Known Event Classification 

    Grezl, Frantisek; Cernocky, Jan (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, ...

  • Utilization of Birefringent Fiber as Sensor of Temperature Field Disturbance 

    Dvorak, Filip; Maschke, Jon; Vlcek, Cestmir (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 ...

  • Multilateral Interoperability Programme 

    Burita, Ladislav (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 ...

  • State-of-the-Art System Solutions for Unmanned Underwater Vehicles 

    Yildiz, Ozgur; Yilmaz, Asim Egemen; Gokalp, Bulent (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 ...

  • EMC Specific Problems of Frequency Converters Used at Interlocking Device 

    Novak, Jaroslav; Dolecek, Radovan; Cerny, Ondrej (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 ...

  • Maximum Available Accuracy of FM-CW Radars 

    Ricny, Vaclav (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 ...

  • Explicit-Current-Output Quadrature Oscillator Using Second-Generation Current Conveyor Transconductance Amplifier 

    Lahiri, Abhirup (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 ...

  • Analyses of Real Email Traffic Properties 

    Malinka, Kamil; Hanacek, Petr; Cvrcek, Dan (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 ...

  • A Novel 2.4GHz CMOS Up-Conversion Current-Mode Mixer 

    Wan, Qiuzhen; Wang, Chunhua; Ma, Minglin (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 ...

  • Embedded Platform for Automatic Testing and Optimizing of FPGA Based Cryptographic True Random Number Generators 

    Varchola, Michal; Drutarovsky, Milos (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 ...

  • A CPW-Fed Novel Planar Ultra-Wideband Antenna with a Band-Notch Characteristic 

    Yu, Fei; Wang, Chunhua (Společnost pro radioelektronické inženýrství, 2009-12)
    A coplanar waveguide (CPW) fed novel planar ultra-wideband antenna with a band-notch characteristic is presented. The proposed antenna consists of a rectangular metal radiation patch and a tapered arc-shaped ground plane. ...

  • Derivation of Criterion Suitable for Evaluation of Multichannel Noise Reduction Systems for Speech Processing 

    Bolom, Vaclav; Ingerle, Jan; 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 ...

  • A Quantitative Study on Optimum Parameters Selection in Adaptive Unsharp Masking Technique for Infrared Images 

    Jane, Onur; Ilk, H. Goekhan (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 ...

  • Traction Permanent Magnet Synchronous Motor Torque Control with Flux Weakening 

    Dolecek, Radovan; Novak, Jaroslav; Cerny, Ondrej (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, Libor; Vrana, Roman (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 ...

  • High-Order Current-Mode and Transimpedance-Mode Universal Filters with Multiple-Inputs and Two-Outputs Using MOCCIIs 

    Horng, Jiun-Wei (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 ...

  • Analysis of Periodic Errors for Synthesized-Reference-Wave Holography 

    Pidanic, Jan; Schejbal, Vladimir; Cermak, Dusan (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 ...

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