Now showing items 1-20 of 28

  • Utilization of Selected Data Mining Methods for Communication Network Analysis 

    Vranova, Z.; Ondryhal, V. (Společnost pro radioelektronické inženýrství, 2011-06)
    The aim of the project was to analyze the behavior of military communication networks based on work with real data collected continuously since 2005. With regard to the nature and amount of the data, data mining methods ...
  • Attenuation in Rectangular Waveguides with Finite Conductivity Walls 

    Yeap, K. H.; Tham, C. Y.; Yassin, G.; Yeong, K. C. (Společnost pro radioelektronické inženýrství, 2011-06)
    We present a fundamental and accurate approach to compute the attenuation of electromagnetic waves propagating in rectangular waveguides with finite conductivity walls. The wavenumbers kx and ky in the x and y directions ...
  • RF and THz Identification Using a New Generation of Chipless RFID Tags 

    Perret, E.; Hamdi, M.; Vena, A.; Garet, F.; Bernier, M.; Duvillaret, L.; Tedjini, S. (Společnost pro radioelektronické inženýrství, 2011-06)
    This article presents two chipless RFID approaches where data are reading using electromagnetic waves and where the medium encoding the data is completely passive. The former approach rests on the use of RF waves (more ...
  • Evaluation and Investigation of the Delay in VoIP Networks 

    Kyrbashov, B.; Baronak, I.; Kovacik, M.; Janata, V. (Společnost pro radioelektronické inženýrství, 2011-06)
    The paper is focused mainly on the delay problems, which considerably influence the final quality of connections in VoIP (Voice over IP) networks. The paper provides a detailed exploration of the nature and mechanisms of ...
  • Estimation of Outage Capacity for Free Space Optical Links Over I-K and K Turbulent Channels 

    Nistazakis, H. E.; Tsigopoulos, A. D.; Hanias, M. P.; Psychogios, C. D.; Marinos, D.; Aidinis, C.; Tombras, G. S. (Společnost pro radioelektronické inženýrství, 2011-06)
    The free space optical communication systems are attracting great research and commercial interest due to their capability of transferring data, over short distances, with high rate and security, low cost demands and without ...
  • Wireless Power Transmission for Power Supply: State of Art 

    Kracek, J.; Mazanek, M. (Společnost pro radioelektronické inženýrství, 2011-06)
    The wireless power supply is motivated by simple and comfortable use of many small electric appliances with low power input. This paper reviews the concepts which are suitable for wireless power transmission with respect ...
  • Effects of Imperfect Reference Signal Recovery on Performance of SC and SSC Receivers over Generalized Fading Channels 

    Nikolic, B. Z.; Djordjevic, G. T.; Milosevic, N. D. (Společnost pro radioelektronické inženýrství, 2011-06)
    This paper presents the study of the effects of imperfect reference signal recovery on the bit error rate (BER) performance of dual-branch switch-and-stay combining (SSC) and multibranch selection combining (SC) receivers ...
  • Design, Fabrication and Properties of Rib Poly(methylmethacrylimide) Optical Waveguides 

    Prajzler, V.; Klapuch, J.; Lyutakov, O.; Huttel, I.; Spirkova, J.; Nekvindova, P.; Jerabek, V. (Společnost pro radioelektronické inženýrství, 2011-06)
    We report about design, fabrication and properties of the polymer optical waveguides deposited on silica-on-silicon substrate. The design of the waveguides is based on a concept that geometric dimensions of the single mode ...
  • Compact and Sharp-Rejection Bandstop Filter Using Uniplanar Double Spiral Resonant Cells 

    Ke Lu; Guang-Ming Wang; He-Xiu Xu (Společnost pro radioelektronické inženýrství, 2011-06)
    A novel compact bandstop filter composed of three cascaded uniplanar double spiral resonant cells (UDSRCs) for high attenuation rates is presented. Through the equivalent circuit prediction and parametric analysis, it is ...
  • 3D UWB Magnitude-Combined Tomographic Imaging for Biomedical Applications. Algorithm Validation 

    Guardiola, M.; Jofre, L.; Capdevila, S.; Blanch, S.; Romeu, J. (Společnost pro radioelektronické inženýrství, 2011-06)
    Biomedical microwave imaging is a topic of continuous research for its potential in different areas especially in breast cancer detection. In this paper, 3D UWB Magnitude-Combined tomographic algorithm is assessed for this ...
  • New chopper modulators using differential voltage current conveyor 

    Kumngern, M. (Společnost pro radioelektronické inženýrství, 2011-06)
    This paper presents new chopper modulators which can enable to assign three modulators in one circuit. Full amplitude modulators as Cowan and Ring modulators are kinds of the amplitude modulators as well. The proposed ...
  • Statistical Channel Model for 60 GHz WLAN Systems in Conference Room Environment 

    Maltsev, A.; Maslennikov, R.; Lomayev, A.; Sevastyanov, A.; Khoryaev, A. (Společnost pro radioelektronické inženýrství, 2011-06)
    In this work, a methodology of statistical channel modeling for 60 GHz WLAN systems is proposed and a channel model for the office conference room environment is developed. The proposed methodology takes into account the ...
  • Intelligent Ray Launching Algorithm for Indoor Scenarios 

    Lai, Z.; De La Roche, G.; Bessis, N.; Kuonen, P.; Clapworthy, G.; Zhou, D.; Zhang, J. (Společnost pro radioelektronické inženýrství, 2011-06)
    This article describes the indoor IRLA (Intelligent Ray Launching Algorithm), which originates from an efficient outdoor propagation prediction model. Implementation and validation are given in detail. An indoor office ...
  • Theoretical Findings and Measurements on Planning a UHF RFID System inside a Room 

    Dimitriou, A. G.; Bletsas, A.; Polycarpou, A. C.; Sahalos, J. N. (Společnost pro radioelektronické inženýrství, 2011-06)
    This paper investigates the problem of improving the identification performance of a UHF RFID system inside a room. We assume static reader, passive tags and availability of commodity antennas. A ray-tracing propagation ...
  • Modeling Deterministic Chaos Using Electronic Circuits 

    Petrzela, J.; Hrubos, Z.; Gotthans, T. (Společnost pro radioelektronické inženýrství, 2011-06)
    This paper brings a note on systematic circuit synthesis methods for modeling the dynamical systems given by mathematical model. Both classical synthesis and integrator based method is demonstrated via the relatively ...
  • Supplementary First-Order All-Pass Filters with Two Grounded Passive Elements Using FDCCII 

    Metin, B.; Herencsar, N.; Pal, K. (Společnost pro radioelektronické inženýrství, 2011-06)
    In this study, two novel first-order all-pass filters are proposed using only one grounded resistor and one grounded capacitor along with a fully differential current conveyor (FDCCII). There is no element-matching ...
  • Current-Mode Dual-Phase Precision Full-Wave Rectifier Using Current-Mode Two-Cell Winner-Takes-All (WTA) Circuit 

    Koton, J.; Lahiri, A.; Herencsar, N.; Vrba, K. (Společnost pro radioelektronické inženýrství, 2011-06)
    In addition to the recently proposed full-wave rectifier by Prommee et al. using voltage-mode (VM)two-cell winner-takes-all (WTA) circuit, we present current-mode (CM) precision full-wave rectifier using CM two-cell WTA ...
  • Theoretical Model of the Bistable Semiconductor Laser Diode Based on the Rate Equations 

    Jerabek, V.; Huttel, I. (Společnost pro radioelektronické inženýrství, 2011-06)
    The paper describes theoretical and experimental results that enabled the authors to proof optical bistability behavior of a specially modified bistable semiconductor laser diode (BLD) created on a structure with a saturable ...
  • A Compact Printed Monopole Antenna for Dual-band RFID and WLAN Applications 

    Panda, J. R.; Saladi, A. S. R.; Kshetrimayum, R. S. (Společnost pro radioelektronické inženýrství, 2011-06)
    Design of a simple and compact microstrip-fed printed monopole antenna (PMA) for applications in wireless local area network (WLAN) and radio frequency identification (RFID) is presented. The dual-band operation is achieved ...
  • Edge Detection with Sub-pixel Accuracy Based on Approximation of Edge with Erf Function 

    Hagara, M.; Kulla, P. (Společnost pro radioelektronické inženýrství, 2011-06)
    Edge detection is an often used procedure in digital image processing. For some practical applications is desirable to detect edges with sub-pixel accuracy. In this paper we present edge detection method for 1-D images ...