Now showing items 21-33 of 33

  • A New Application of Current Conveyors: The Design of Wideband Controllable Low-Noise Amplifiers 

    Godara, B.; Fabre, A. (Společnost pro radioelektronické inženýrství, 2008-12)
    The aim of this paper is three-fold. First, it reviews the low-noise amplifier and its relevance in wireless communications receivers. Then it presents an exhaustive review of the existing topologies. Finally, it introduces ...
  • Utilization of Faraday Mirror in Fiber Optic Current Sensors 

    Drexler, P.; Fiala, P. (Společnost pro radioelektronické inženýrství, 2008-12)
    Fiber optic sensors dispose of some advantages in the field of electrical current and magnetic field measurement, like large bandwidth, linearity, light transmission possibilities. Unfortunately, they suffer from some ...
  • Ways to Optimize Analogue Switched Circuits 

    Dolivka, L.; Hospodka, J. (Společnost pro radioelektronické inženýrství, 2008-12)
    This paper describes how analogue switched circuits (switched-capacitor and switched-current circuits) can be optimized by means of a personal computer. The optimization of this kind of circuits is not so common and their ...
  • Implementation of Industrial Narrow Band Communication System into SDR Concept 

    Bobula, M.; Danek, K.; Prokes, A. (Společnost pro radioelektronické inženýrství, 2008-12)
    The rapid expansion of the digital signal processing has penetrated recently into a sphere of high performance industrial narrow band communication systems which had been for long years dominated by the traditional analog ...
  • An Efficient Finger Allocation Method for the Maximum Likelihood RAKE Receiver 

    Baltzis, K. B. (Společnost pro radioelektronické inženýrství, 2008-12)
    In wideband wireless communication systems the RAKE receiver is commonly used to collect the resolvable multipath energy and counter the effects of fading through diversity. However, in channels with large delay and energy ...
  • Optimization of Micro Strip Array Antennas Using Hybrid Particle Swarm Optimizer with Breeding and Subpopulation for Maximum Side-Lobe Reduction 

    Chaker, H.; Meriah, S. M.; Bendimerad, F. T. (Společnost pro radioelektronické inženýrství, 2008-12)
    In this paper, a technique based on hybrid particle swarm optimiser with breeding and subpopulation is presented for optimal design of reconfigurable dual-beam linear array antennas and planar arrays. In the amplitudephase ...
  • Recent Techniques in Design and Implementation of Microwave Planar Filters 

    Baral, R. N.; Singhal, P. K. (Společnost pro radioelektronické inženýrství, 2008-12)
    This paper details the techniques and initiatives made recently for improved response and simultaneous development of microwave planar filters. Although the objective of all the techniques is to design low cost filters ...
  • Enhancement of Optical Coherence Tomography Images of the Retina by Normalization and Fusion 

    Rossant, F.; Amiel, F.; Ea, T.; Martinez, C. M.; Paques, M. (Společnost pro radioelektronické inženýrství, 2008-12)
    This paper describes an image processing method applied to Optical Coherence Tomography (OCT) images of the retina. The aim is to achieve improved OCT images from the fusion of sequential OCT scans obtained at identical ...
  • Eyelid Localization for Iris Identification 

    Adam, M.; Rossant, F.; Amiel, F.; Mikovikova, B.; Ea, T. (Společnost pro radioelektronické inženýrství, 2008-12)
    This article presents a new eyelid localization algorithm based on a parabolic curve fitting. To deal with eyelashes, low contrast or false detection due to iris texture, we propose a two steps algorithm. First, possible ...
  • Design of Microstrip Band Pass Fractal Filter for Suppression of Spurious Band 

    Baral, R. N.; Singhal, P. K. (Společnost pro radioelektronické inženýrství, 2008-12)
    In this paper, the design and subsequent fabrication of a hairpin-line band pass filter has been proposed. This filter exhibits periodic frequency response. By proper design, the spurious bands are being suppressed ...
  • A New CAC Method Using Queuing Theory 

    Baronak, I.; Kvackaj, P. (Společnost pro radioelektronické inženýrství, 2008-12)
    The CAC (Connection Admission Control) method plays an important role in the ATM (Asynchronous Transfer Mode) network environment. The CAC is the first step in the prevention of congested states in the network topology, ...
  • Application of a Cumulative Method for Car Borders Specification in Image 

    Dobrovolny, M.; Bezousek, P.; Hajek, M. (Společnost pro radioelektronické inženýrství, 2008-12)
    The paper deals with low-level car detection methods in images. The car detection is an integral part of all intelligent car cruise systems. This article describes the method for suppression of the edges produced by classical ...
  • The Utilization of Novel Bandpass Sigma-delta Modulator for Capacitance Pressure Sensor Signal Processing 

    Haze, J.; Fujcik, L.; Vrba, R.; Pavlik, M.; Michaeli, L. (Společnost pro radioelektronické inženýrství, 2008-12)
    The paper deals with a novel approach to processing of pressure sensor signals. A bandpass sigma-delta modulator is used for this purpose. This technique is relatively new and it is not used widely, because this kind of ...