• 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 ...
  • Considerations on Configurable Multi-Standard Antennas for Mobile Terminals Realized in LTCC Technology 

    Manteuffel, D.; Arnold, M.; Uhlig, P. (Společnost pro radioelektronické inženýrství, 2009-12)
    This paper is an extended version of a paper presented at the EuCAP 2009 conference [1]. We present part of a long term research project that aims on designing a (re-)configurable multi-standard antenna element for 4G (4th ...
  • A CPW-Fed Novel Planar Ultra-Wideband Antenna with a Band-Notch Characteristic 

    Yu, F.; Wang, C. (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, 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 ...
  • Design of a Multimode MIMO Antenna Using the Theory of Characteristic Modes 

    Antonino-Daviu, E.; Cabedo-Fabres, M.; Ferrando-Bataller, M.; Gallo, M. (Společnost pro radioelektronické inženýrství, 2009-12)
    In this communication, the design procedure of a multimode Multiple-Input Multiple-Output (MIMO) antenna is presented. The antenna consists of a metallic ring antenna operating with different orthogonal modes, whose ...
  • 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 ...
  • 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 ...
  • Efficient Procedure for the Calculation of Electric and Magnetic Energies in Vacuum 

    Vandenbosch, G. A. E. (Společnost pro radioelektronické inženýrství, 2009-12)
    New expressions are derived to calculate the reactive energy stored in the electromagnetic field surrounding an electromagnetic device. The resulting expressions are 1. very simple to interpret, 2. general, 3. rigorous in ...
  • Efficient Testing of Wireless Devices from 800 MHz to 18 GHz 

    Foged, L. J.; Scannavini, A. (Společnost pro radioelektronické inženýrství, 2009-12)
    Small antennas and other modern communication applications are using increasingly higher frequencies while demanding shorter development time and very rapid testing cycles. A fast and accurate way to exhaustively determine ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Evaluation of a Mutually Coupled Diversity Receiver 

    Volmer, C.; Stephan, R.; Hein, M. A. (Společnost pro radioelektronické inženýrství, 2009-12)
    A quick, reliable, and simple evaluation of mutual coupling effects is essential for the optimization of antenna arrays for small mobile communications devices. In recent papers we have proposed novel figures of merit that ...
  • 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 ...
  • 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: ...
  • 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. ...
  • A High-Capacity Image Data Hiding Scheme Using Adaptive LSB Substitution 

    Yang, H.; Sun, X.; Sun, G. (Společnost pro radioelektronické inženýrství, 2009-12)
    Many existing steganographic methods hide more secret data into edged areas than smooth areas in the host image, which does not differentiate textures from edges and causes serious degradation in actual edge areas. To avoid ...
  • 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 ...
  • Impact of Finger Placement on the Correlation Properties of Rake Combined Signals 

    Baltzis, K. B. (Společnost pro radioelektronické inženýrství, 2009-12)
    3G mobile devices and base stations employ rake receivers. An important issue in the design of such receivers is finger allocation. This paper explores the relationship between finger placement and the correlation properties ...