• 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 ...
  • Maximum Available Accuracy of FM-CW Radars 

    Ricny, V. (Společnost pro radioelektronické inženýrství, 2009-12)
    This article deals with the principles and above all with the maximum available measuring accuracy analyse of FM-CW (Frequency Modulated Continuous Wave) radars, which are usually employed for distance and velocity ...
  • A Miniaturization Technique of a Compact Omnidirectional Antenna 

    Sufyar, S.; Delaveaud, C. (Společnost pro radioelektronické inženýrství, 2009-12)
    This paper discusses a miniaturization technique of a compact omnidirectional antenna. A slot loading technique is applied to a well-known low-profile antenna structure whose radiation characteristics are similar to ...
  • Modeling of Scientific Images Using GMM 

    Svihlik, J. (Společnost pro radioelektronické inženýrství, 2009-12)
    This paper deals with modeling of scientific and multimedia images in the wavelet domain. Images transformed into wavelet domain have a special shape of probability density function (PDF). Thus wavelet coefficients PDFs ...
  • Modeling of Transmission Functions and Crosstalk in Metallic Cables for Implementation of MIMO Concept 

    Lafata, P.; Vodrazka, J. (Společnost pro radioelektronické inženýrství, 2009-12)
    The new promising wireless networks based on multi-carrier modulations (MCM) and multiple-input multiple-output concept (MIMO) will soon offer high-speed digital connections. Their access points are mostly connected by ...
  • Multilateral Interoperability Programme 

    Burita, L. (Společnost pro radioelektronické inženýrství, 2009-12)
    The Multilateral Interoperability Programme (MIP) is a voluntary and independent activity in NATO environment by the participating nations and organizations. The MIP concept is based on data exchange in form of common ...
  • Multiport Multiband Decoupling Optimization for Miniature Antennas 

    Serrano, R.; Capdevila, S.; Aguasca, A.; Romeu, J.; Jofre, L. (Společnost pro radioelektronické inženýrství, 2009-12)
    Multiband multiport antennas are increasingly used for wireless communications and sensing miniature devices. The equations governing the multiport multiband antennas are analyzed in this paper with the objective of drawing ...
  • A Novel 2.4GHz CMOS Up-Conversion Current-Mode Mixer 

    Wan, Q.; Wang, C.; Ma, M. (Společnost pro radioelektronické inženýrství, 2009-12)
    In this paper, a low-power up-conversion current-mode mixer, designed in the chartered 0.18-μm RFCMOS technology, is proposed to realize the transmitter front-end in the frequency band of 2.4 GHz. The proposed mixer can ...
  • A Novel Comb-Pilot Transform Domain Frequency Diversity Channel Estimation for OFDM System 

    Liu, L.; Tao, C.; Qiu, J.; Qi, X. (Společnost pro radioelektronické inženýrství, 2009-12)
    Due to implementation complexity, the transform domain channel estimation based on training symbols or comb-type pilots has been paid more attention because of its efficient algorithm FFT/IFFT. However, in a comb-type OFDM ...
  • Performance of Predictor Based Link Adaptation Algorithms 

    Wieser, V.; Psenak, V. (Společnost pro radioelektronické inženýrství, 2009-12)
    The presented paper deals with the link adaptation algorithms in mobile radio access networks based on Wideband Code Division Multiple Access (WCDMA). The mobile radio channel has a significant impact on the transmitted ...
  • The Quality Factor of the Folded Cylindrical Helix 

    Best, S. R. (Společnost pro radioelektronické inženýrství, 2009-12)
    Any electrically small antenna can be impedance matched at any single frequency using a number of well known techniques. Once the small antenna is impedance matched, the primary characteristics of interest are its radiation ...
  • A Quantitative Study on Optimum Parameters Selection in Adaptive Unsharp Masking Technique for Infrared Images 

    Jane, O.; Ilk, H. G. (Společnost pro radioelektronické inženýrství, 2009-12)
    Infrared image processing has been the focal point of considerable research activity in the last decade mainly because of its wide application areas in security and defense. With the aid of an existing image enhancement ...
  • Reconfigurable Pico-cell Antenna Array for Indoor Coverage in GSM 900 Band 

    Ivsic, B.; Bonefacic, D.; Bartolic, J. (Společnost pro radioelektronické inženýrství, 2009-12)
    This paper proposes a simple antenna array based on three stacked shorted patches aimed to be used as GSM (900 MHz) indoor base station antenna. Three same linearly polarized stacked patches are set in three orthogonal ...
  • Repeatable Performance Measurements of MIMO Systems in Connected Reverberation Chambers with Controlled Keyhole Effect 

    Orlenius, C.; Andersson, M. (Společnost pro radioelektronické inženýrství, 2009-12)
    A straightforward, fast, and repeatable procedure for measuring the system performance of the antennas in a MIMO system is presented. Due to the use of two connected reverberation chambers, the so called keyhole effect is ...
  • Shielded Micro-Coplanar CRLH TL Zeroth-Order Resonator Antenna: Critical Performance Evaluation 

    Polivka, M.; Vrba, D. (Společnost pro radioelektronické inženýrství, 2009-12)
    The attention of this paper is focused on the four unit cell zeroth-order resonator antenna (ZORA), manufactured on a shielded micro-coplanar composite right/left-handed (CRLH) transmission line structure. The antenna was ...
  • State-of-the-Art System Solutions for Unmanned Underwater Vehicles 

    Yildiz, O.; Yilmaz, A. E.; Gokalp, B. (Společnost pro radioelektronické inženýrství, 2009-12)
    Unmanned Underwater Vehicles (UUVs) have gained popularity for the last decades, especially for the purpose of not risking human life in dangerous operations. On the other hand, underwater environment introduces numerous ...
  • Study of a Miniaturized Quasi-Self-Complementary UWB Antenna in Frequency and Time Domain 

    Guo, L.; Chen, X.; Parini, C. (Společnost pro radioelektronické inženýrství, 2009-12)
    A compact antenna for UWB communication systems has been realized by employing a quasi-selfcomplementary structure together with a triangular notch on microstrip feed line in this paper. The optimal design of this type of ...