Poslední příspěvky

  • A large-scale RF-based Indoor Localization System Using Low-complexity Gaussian filter and improved Bayesian inference 

    Xiao, L.; Yin, Y.; Wu, X. N.; Wang, J. W. (Společnost pro radioelektronické inženýrství, 2013-04)
    The growing convergence among mobile computing device and smart sensors boosts the development of ubiquitous computing and smart spaces, where localization is an essential part to realize the big vision. The general ...
  • Low-complexity Noncoherent Iterative CPM Demodulator for FH Communication 

    Wang, Y.; Liu, A.; Guo, D.; Liu, X. (Společnost pro radioelektronické inženýrství, 2013-04)
    In this paper, we investigate the noncoherent iterative demodulation of coded continuous phase modulation (CPM) in frequency hopped (FH) systems. In this field, one important problem is that the complexity of the optimal ...
  • Hybrid M-FSK/DQPSK Modulations for CubeSat Picosatellites 

    Vertat, I.; Mraz, J. (Společnost pro radioelektronické inženýrství, 2013-04)
    Conventional CubeSat radio systems typically use one of several basic modulations, such as AFSK, GMSK, BPSK, QPSK and OOK or switch between them on demand if possible. These modulations represent a bal¬anced trade-off ...
  • SGD Frequency-Domain Space-Frequency Semiblind Multiuser Receiver with an Adaptive Optimal Mixing Parameter 

    Phrompichai, S. (Společnost pro radioelektronické inženýrství, 2013-04)
    A novel stochastic gradient descent frequency-domain (FD) space-frequency (SF) semiblind multiuser receiver with an adaptive optimal mixing parameter is proposed to improve performance of FD semiblind multiuser receivers ...
  • High–Speed Data Transmission Subsystem of the SEOSAR/PAZ Satellite 

    Fernandez, J. R. O.; Draskovic, D.; Briso–Rodriguez, C. (Společnost pro radioelektronické inženýrství, 2013-04)
    This paper analyzes a digital interface and bus system modeling and optimization of the SEOSAR/PAZ Earth Observation satellite. The important part of the satellite is an X–band Synthetic Aperture Radar instrument that ...
  • Sharp Response Microstrip LPF using Folded Stepped Impedance Open Stubs 

    Makki, S. V.; Ahmadi, A.; Majidifar, S.; Sariri, H.; Rahmani, Z. (Společnost pro radioelektronické inženýrství, 2013-04)
    A novel microstrip lowpass filter with high selectivity and wide stopband is proposed that comprises two lateral folded open stubs and a central mirrored semi-circle ended suppressing cell. The proposed filter has cut-off ...
  • Electromagnetic Absorption of Gaussian Beams by a Grounded Layered Structure 

    Valagiannopoulos, C. A. (Společnost pro radioelektronické inženýrství, 2013-04)
    A layered structure of magnetodielectric slabs, backed with a perfectly conducting plane, is illuminated by a Gaussian beam. The permittivities and permeabilities of each layer are selected so that the incident field ...
  • Spatial Characterization of the Uplink Inter-Cell Interference in Polygonal-Shaped Wireless Networks 

    Baltzis, K. B. (Společnost pro radioelektronické inženýrství, 2013-04)
    The uplink inter-cell interference is a major impairment in wireless systems. In this paper, we provide a geometrical-based framework for its analysis in networks with convex polygonal coverage area. Algebraic expressions ...
  • Preparation and Characterization of Bragg Fibers for Delivery of Laser Radiation at 1064 nm 

    Matejec, V.; Kasik, I.; Podrazky, O.; Aubrecht, J.; Frank, M.; Jelinek, M.; Kubecek, V. (Společnost pro radioelektronické inženýrství, 2013-04)
    Bragg fibers offer new performance for transmission of high laser energies over long distances. In this paper theoretical modeling, preparation and characterization of Bragg fibers for delivery laser radiation at 1064 nm ...
  • Application of Fiber Ring for Protection of Passive Optical Infrastructure 

    Lafata, P.; Vodrazka, J. (Společnost pro radioelektronické inženýrství, 2013-04)
    Today, passive optical networks (PONs) are mostly used as modern high-speed access networks for various applications. However, there are also several specific applications, such as in business, office, army or science ...
  • Measurement of Spatial Coherence of Light Propagating in a Turbulent Atmosphere 

    Barcik, P.; Hudcova, L. (Společnost pro radioelektronické inženýrství, 2013-04)
    A lot of issues have to be taken into account when designing a reliable free space optical communication link. Among these are e.g.,beam wander, fluctuation of optical intensity and loss of spatial coherence that are caused ...
  • Optical Splitters Based on Self-Imaging Effect in Multi-Mode Waveguide Made by Ion Exchange in Glass 

    Barkman, O.; Jerabek, V.; Prajzler, V. (Společnost pro radioelektronické inženýrství, 2013-04)
    Design and modeling of single mode optical multi-mode interference structures with graded refractive index is reported. Several samples of planar optical channel waveguides were obtained by Ag+<->Na+ and K+<->Na+ one step ...
  • A Dual-Band Circularly-Polarized Patch Antenna with a Novel Asymmetric Slot for WiMAX Application 

    Noghabaei, S. M.; Rahim, S. K. A.; Soh, P. J.; Abedian, M.; Vandenbosch, G. A. E. (Společnost pro radioelektronické inženýrství, 2013-04)
    A compact design of a circularly-polarized (CP) microstrip antenna to achieve dual-band behavior for WiMAX applications is presented. A single-layered feed is used to excite a single square patch integrated with a novel ...
  • A Compact and Wideband Coupled-Line Coupler with High Coupling Level Using Shunt Periodic Stubs 

    Keshavarz, R.; Movahhedi, M. (Společnost pro radioelektronické inženýrství, 2013-04)
    A wideband microstrip forward-wave coupled-line coupler with high coupling value is presented. Compared with the conventional edge-coupled microstrip forward-wave coupler, this symmetrical structure, consisting periodic ...
  • Stacked High-Impedance Surface (HIS) for 5 GHz WLAN Applications 

    Kovacs, P.; Puskely, J. (Společnost pro radioelektronické inženýrství, 2013-04)
    In this work we present a stacked high-impedance surface (HIS) for low-profile, high-gain, 5 GHz WLAN antennas. The structure consists of two layers: a lower mushroom layer and an upper planar layer. We demonstrate that ...
  • Time-Domain Finite Elements for Virtual Testing of Electromagnetic Compatibility 

    Sedenka, V.; Ciganek, J.; Kadlec, P.; Raida, Zbyněk; Wiktor, M.; Sarto, M. S.; Greco, S. (Společnost pro radioelektronické inženýrství, 2013-04)
    The paper presents a time-domain finite-element solver developed for simulations related to solving electromagnetic compatibility issues. The software is applied as a module integrated into a computational framework developed ...
  • Multi-Objective Self-Organizing Migrating Algorithm: Sensitivity on Controlling Parameters 

    Kadlec, P.; Raida, Zbyněk; Drinovsky, J. (Společnost pro radioelektronické inženýrství, 2013-04)
    In this paper, we investigate the sensitivity of a novel Multi-Objective Self-Organizing Migrating Algorithm (MOSOMA) on setting its control parameters. Usually, efficiency and accuracy of searching for a solution depends ...
  • Low-Voltage MOS Current Mode Logic Multiplexer 

    Gupta, K.; Pandey, N.; Gupta, M. (Společnost pro radioelektronické inženýrství, 2013-04)
    In this paper, a new low-voltage MOS current mode logic (MCML) multiplexer based on the triple-tail cell concept is proposed. An analytical model for static parameters is formulated and is applied to develop a design ...
  • A Novel Three-Point Modulation Technique for Fractional-N Frequency Synthesizer Applications 

    Peng, Kang-Chun; Lin, Chiu-Chin; Chao, Ching-Hui (Společnost pro radioelektronické inženýrství, 2013-04)
    This paper presents a novel three-point modulation technique for fractional-N frequency synthesizer applications. Convention modulated fractional-N frequency synthesizers suffer from quantization noise, which degrades not ...
  • Wideband P-Shaped Dielectric Resonator Antenna 

    Khalily, M.; Rahim, M.K.A.; Kishk, A.A.; Danesh, S. (Společnost pro radioelektronické inženýrství, 2013-04)
    A novel P-shaped dielectric resonator antenna (DRA) is presented and investigated for wideband wireless application. By using P-shaped resonator, a wideband impedance bandwidth of 80% from 3.5 to 8.2 GHz is achieved. The ...

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