Now showing items 1-20 of 41

  • Antenna Arrays for Tactical Communication Systems: A Comparative Study 

    Bartyzal, J.; Bostik, T.; Kovacs, P.; Mikulasek, T.; Puskely, J.; Raida, Zbyněk; Slama, L.; Vorek, J.; Wolansky, D. (Společnost pro radioelektronické inženýrství, 2011-12)
    In this paper, we give a comparative study of several planar antenna concepts for reliable long range links in a tactical environment. The antenna elements are studied in terms of their electrical properties (bandwidth, ...
  • A Novel Multi-Objective Self-Organizing Migrating Algorithm 

    Kadlec, P.; Raida, Zbyněk (Společnost pro radioelektronické inženýrství, 2011-12)
    In the paper, a novel stochastic Multi-Objective Self Organizing Migrating Algorithm (MOSOMA) is introduced. For the search of optima, MOSOMA employs a migration technique used in a single-objective Self Organizing Migrating ...
  • Multi-objective Synthesis of Antennas from Special and Conventional Materials 

    Raida, Zbyněk; Kadlec, P.; Kovacs, P.; Lacik, J.; Lukes, Z.; Pokorny, M.; Vsetula, P.; Wolansky, D. (Společnost pro radioelektronické inženýrství, 2011-12)
    In the paper, we try to provide a comprehensive look on a multi-objective design of radiating, guiding and reflecting structures fabricated both from special materials (semiconductors, high-impedance surfaces) and conventional ...
  • An Automatic Technique for MRI Based Murine Abdominal Fat Measurement 

    Tang, Y.; Simerly, R.; Moats, R. A. (Společnost pro radioelektronické inženýrství, 2011-12)
    Because of the well-known relationship between obesity and high incidence of diseases, fat related research using mice models is being widely investigated in preclinical experiments. In the present study, we developed a ...
  • Miniature Sensor Node with Conformal Phased Array 

    Vandenbosch, G. A. E.; Vasylchenko, A.; Fernandez-Bolanos, M.; Brebels, S.; De Raedt, W.; Ionescu, A. M. (Společnost pro radioelektronické inženýrství, 2011-12)
    This paper reports on the design and fabrication of a fully integrated antenna beam steering concept for wireless sensor nodes. The conformal array circumcises four cube faces with a silicon core mounted on each face. Every ...
  • Analysis and Simulation of the Transmission Distortions of the Mobile Digital Television DVB-SH Part 1: Terrestrial Mode DVB-SH-A with OFDM 

    Polak, L.; Kratochvil, T. (Společnost pro radioelektronické inženýrství, 2011-12)
    This paper deals with the latest digital TV standard DVB-SH (Digital Video Broadcasting - Satellite to Handhelds) with focus on utilization of its advantages for the next generation of mobile TV broadcasting. The whole ...
  • An Performance Study for Sectorised Antenna based Doppler Diversity in High-Speed Railway Communications 

    Liu Liu; Cheng Tao; Jiahui Qiu; Houjin Chen (Společnost pro radioelektronické inženýrství, 2011-12)
    The wireless channel of High-Speed Railway communication system is rapidly time-varying. The orthogonal frequency division multiplexing transmitting over this channel will be exposed to the intercarrier interference caused ...
  • EM Scattering by a Conducting Sphere Coated with a Uniaxial Layer under Arbitrary Illumination Angle in a Fixed Laboratory Frame 

    Song, Y.; Tse, C. M. (Společnost pro radioelektronické inženýrství, 2011-12)
    Under a fixed laboratory frame, the electromagnetic theory of the scattering of a plane wave of arbitrary polarizations incidence from arbitrary angles by a uniaxial anisotropic medium was obtained for the first time, and ...
  • Efficient Algorithm for Power Allocation in Relay-based Cognitive Radio Network 

    Ferdous, N.; Ahmed, M.; Matin, M. A.; Habiba, U. (Společnost pro radioelektronické inženýrství, 2011-12)
    This paper addresses a cognitive radio (CR) network scenario where a relay is assigned to mitigate interference to primary users (PUs). We develop an average probability of successful secondary transmission (PSST) to ...
  • Improvement to Load-pull Technique for Design of Large-signal Amplifier in K band 

    Moravek, O.; Hoffmann, K. (Společnost pro radioelektronické inženýrství, 2011-12)
    An improvement to the load-pull technique for a large-signal design of a transistor amplifier is proposed. On the contrary to the current load-pull technique – a small-signal pre-matching on the output of the transistor ...
  • Performance of Czech Speech Recognition with Language Models Created from Public Resources 

    Prochazka, V.; Pollak, P.; Zdansky, J.; Nouza, J. (Společnost pro radioelektronické inženýrství, 2011-12)
    In this paper, we investigate the usability of publicly available n-gram corpora for the creation of language models (LM) applicable for Czech speech recognition systems. N-gram LMs with various parameters and settings ...
  • Comparison of Two Methods for Automatic Brain Morphometry Analysis 

    Schwarz, D.; Kasparek, T. (Společnost pro radioelektronické inženýrství, 2011-12)
    The methods of computational neuroanatomy are widely used; the data on their individual strengths and limitations from direct comparisons are, however, scarce. The aim of the present study was direct comparison of DBM based ...
  • Current-Mode Universal Biquad Using Current Followers: A Minimal Realization 

    Senani, R.; Gupta, S. S. (Společnost pro radioelektronické inženýrství, 2011-12)
    A new universal biquad filter is presented which employs a minimum number of active elements (only three current followers (CF)) along with a minimum number of passive components (i.e. only two resistors and two capacitors). ...
  • Data Processing in Multiport-Based Reflectometer System 

    Dvorak, R.; Urbanec, T. (Společnost pro radioelektronické inženýrství, 2011-12)
    The paper describes operations with DC output voltage of multiport based system. Proposed system is based on the same principle as common six ports systems, however the used coupler has more outputs. This allows extension ...
  • Some Consideration on Shielding Effectiveness Testing by means of the Nested Reverberation Chambers 

    Krzysztofik, W. J.; Borowiec, R.; Bieda, B. (Společnost pro radioelektronické inženýrství, 2011-12)
    This paper evaluates the effects of test fixture isolation when using nested mode-stir chambers for conducting electromagnetic shielding measurements. The nested chamber technique is used by both government and industry ...
  • Digitally Programmable Fully Differential Filter 

    Beg, P.; Khan, I. A.; Maheshwari, S.; Siddiqi, M. A. (Společnost pro radioelektronické inženýrství, 2011-12)
    In this paper a new digitally programmable voltage mode fully differential Kerwin-Huelsman-Newcomb(KHN) filter is realized using digitally controlled CMOS fully balanced output transconductor (DCBOTA). The realized filter ...
  • Meandered Monopoles for 700 MHz LTE Handsets and Improved MIMO Channel Capacity Performance 

    Dioum, I.; Clemente, M.; Diallo, A.; Luxey, C.; Rossi, J. P.; Farssi, S. M. (Společnost pro radioelektronické inženýrství, 2011-12)
    In this paper, we present the design and the measurement of MIMO meandered monopole antennas and the computation of their channel capacity performance. The initial proposed handset-system is composed of a meandered monopole ...
  • A New Method For Increasing the Accuracy of EM-based Channel Estimation 

    Sadough, S. M. S.; Modarresi, M. (Společnost pro radioelektronické inženýrství, 2011-12)
    It was recently shown that the detection performance can be significantly improved if the statistics of channel estimation errors are available and properly used at the receiver. Although in pilot-only channel estimation ...
  • A Simplified Geometric Channel Model for Mobile-to-Mobile Communications 

    Baltzis, K. B. (Společnost pro radioelektronické inženýrství, 2011-12)
    In Mobile-to-Mobile (M2M) communications, the communicating nodes are surrounded by scatterers and equipped with low elevation antennas. This paper proposes a simple 2-D geometric scattering model for M2M channels. The ...
  • Error Probability in Redundant Packet Sending over IP Network 

    Stanić, M.; Lebl, A.; Mitić, D.; Markov, Z. (Společnost pro radioelektronické inženýrství, 2011-12)
    In this paper we calculate error probability of packetized signal when method of redundant packet sending is used in IP network. The number of repeated signaling packets from each interval of packetization is determined ...