Poslední příspěvky

  • Systematic Design of Fully Balanced Differential Current-Mode Multiple-Loop Feedback Filters Using CFBCCII 

    Chunhua, W.; Yang, L.; Qiujing, Z.; Yu, F. (Společnost pro radioelektronické inženýrství, 2010-04)
    In this paper, a systematic design method producing balanced current-mode filters is proposed, using current controlled fully balanced second-generation current conveyor circuit (CFBCCII). In this method, many kind of ...
  • New Grounded and Floating Simulated Inductance Circuits using Current Differencing Transconductance Amplifiers 

    Prasad, D.; Bhaskar, D. R.; Singh, A. K. (Společnost pro radioelektronické inženýrství, 2010-04)
    Current differencing transconductance amplifier (CDTA) is receiving considerable attention as a building block for current-mode (CM) analog signal processing / signal generation. In this paper, new CDTA based lossless ...
  • Optical Fiber Distributed Sensing System Applied in Cement Concrete Commixture Research 

    Koudelka, P.; Petrujova, B.; Latal, J.; Hanacek, F.; Siska, P.; Skapa, J.; Vasinek, V. (Společnost pro radioelektronické inženýrství, 2010-04)
    DTS are unique optical-fiber distributed systems for measuring of temperature or mechanical tension. These systems use non-linear properties of optical fibers. Optical fiber can therefore be used not only for telecommunication ...
  • Feedback Compensation Algorithm for BPSK/QPSK Carrier Synchronization 

    Liu, Y.; Tao, C. (Společnost pro radioelektronické inženýrství, 2010-04)
    This paper deals with carrier synchronization problem in coherent communication system, such as BPSK and QPSK. First, this paper surveys and analyzes currently existing carrier synchronization algorithms and relevant ...
  • Minimum Configuration Insensitive Multifunctional Current-Mode Biquad Using Current Conveyors and All-Grounded Passive Components 

    Chunhua, W.; Keskin, A. U.; Yang, L.; Qiujing, Z.; Sichun, D. (Společnost pro radioelektronické inženýrství, 2010-04)
    This paper proposes a new current conveyorbased high-output impedance single-input three-output current mode filter with minimum configuration. It contains two dual output second generation current conveyors, one third ...
  • Electrical Analogy to an Atomic Force Microscope 

    Kucera, O. (Společnost pro radioelektronické inženýrství, 2010-04)
    Several applications of the atomic force microscopy (AFM), such as measurement of soft samples, manipulation with molecules, etc., require mechanical analysis of the AFM probe behavior. In this article we suggest the ...
  • Circularly Polarized Aperture Coupled Microstrip Antenna with Resonant Slots and a Screen 

    Kirov, G. S.; Mihaylova, D. P. (Společnost pro radioelektronické inženýrství, 2010-04)
    A broadband circularly polarized (CP) Aperture Coupled Microstrip Antenna (ACMSA) is described herein. In order to decrease the back radiation of the antenna due to resonant coupling slots (a cross-slot) in the ground ...
  • Calculation and Comparison of Turbulence Attenuation by Different Methods 

    Dordova, L.; Wilfert, O. (Společnost pro radioelektronické inženýrství, 2010-04)
    This paper is focused on the effect of turbulence in atmospheric transmission media. A short introduction of the origin of turbulent atmosphere is given. Two classical methods for the calculation of turbulence attenuation ...
  • FMCW Radar Performance for Atmospheric Measurements 

    Ince, T. (Společnost pro radioelektronické inženýrství, 2010-04)
    Frequency-modulated continuous-wave radars (FMCW) have been used in the investigation of the atmosphere since the late 1960’s. FMCW radars provide tremendous sensitivity and spatial resolution compared to their pulsed ...
  • Simulation and Evaluation of CTP and Secure-CTP Protocols 

    Pecho, P.; Hanacek, P.; Nagy, J. (Společnost pro radioelektronické inženýrství, 2010-04)
    The paper discusses characteristics and qualities of two routing protocols – Collection Tree Protocol and its secure modification. The original protocol, as well as other protocols for wireless sensors, solves only problems ...
  • New Channel Coding Methods for Satellite Communication 

    Rumanek, J.; Sebesta, J. (Společnost pro radioelektronické inženýrství, 2010-04)
    This paper deals with the new progressive channel coding methods for short message transmission via satellite transponder using predetermined length of frame. The key benefits of this contribution are modification and ...
  • Electromagnetic Cylindrical Transparent Devices with Irregular Cross Section 

    Yang, C.; Yang, J.; Huang, M.; Shi, J.; Peng, J. (Společnost pro radioelektronické inženýrství, 2010-04)
    Electromagnetic transparent device is very important for antenna protection. In this paper, the material parameters for the cylindrical transparent devices with arbitrary cross section are developed based on the coordinate ...
  • Analysis for Design and Transformation of Autosynchronous State Machines 

    Kovac, M.; Kolouch, J. (Společnost pro radioelektronické inženýrství, 2010-04)
    The paper deals with design and transformation methodology of autosynchronous state machines. The result is the design methodology for autosynchronous state machines with one-hot and Gray encodings. On the basis of their ...
  • Modeling of the Phase Noise in Space Communication Systems 

    Baran, O.; Kasal, M. (Společnost pro radioelektronické inženýrství, 2010-04)
    Our work is focused on the investigation of an influence of an additive thermal noise and a multiplicative phase noise in space communication chains. The most important properties of both noise types are summarized. The ...
  • Multicriteria Optimization of Antennas in Time-Domain 

    Lacik, J.; Lager, I. E.; Raida, Zbyněk (Společnost pro radioelektronické inženýrství, 2010-04)
    An original approach to the time-domain multicriteria optimization of antennas is presented. For a given excitation pulse, the time-domain objective function takes the “time-domain impedance matching”, distortion of responses ...
  • A Terrestrial Multiple-Receiver Radio Link Experiment at 10.7 GHz - Comparisons of Results with Parabolic Equation Calculations 

    Valtr, P.; Pechač, Pavel; Kvicera, V.; Grabner, M. (Společnost pro radioelektronické inženýrství, 2010-04)
    This work presents the results of a terrestrial multiple-receiver radio link experiment at 10.7 GHz. Results are shown in the form of the power levels recorded at several antennas attached to a receiving mast. Comparisons ...
  • Global Evolutionary Algorithms in the Design of Electromagnetic Band Gap Structures with Suppressed Surface Waves Propagation 

    Kovacs, P.; Raida, Zbyněk (Společnost pro radioelektronické inženýrství, 2010-04)
    The paper is focused on the automated design and optimization of electromagnetic band gap structures suppressing the propagation of surface waves. For the optimization, we use different global evolutionary algorithms like ...
  • Comparison of Fuzzy Logic and Genetic Algorithm Based Admission Control Strategies for UMTS System 

    Kejík, P.; Hanus, S. (Společnost pro radioelektronické inženýrství, 2010-04)
    CDMA systems have so-called soft capacity, so the total number of possible sessions has not an exact value. The capacity of CDMA system depends on the interference level in the system. There are therefore RRM (Radio Resources ...
  • Closed-form Description of Microwave Signal Attenuation in Cellular Systems 

    Baltzis, K. B. (Společnost pro radioelektronické inženýrství, 2010-04)
    The reliable and accurate description of signal attenuation characteristics is important in the simulation and performance analysis of wireless communications systems. Recent works have provided analytical expres- sions ...
  • A New Method for Generating High Non-linearity S-Boxes 

    Tesar, P. (Společnost pro radioelektronické inženýrství, 2010-04)
    Substitution boxes are important parts in many block and stream ciphers. The emergence of a range of crypto-attacks has led to the development of criteria for repelling such attacks. The non-linearity criterion provides ...

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