Now showing items 1-20 of 33

  • Numerical Modeling of Magnetic Field Deformation as Related to Susceptibility Measured with an MR System 

    Bartusek, K.; Fiala, P.; Mikulka, J. (Společnost pro radioelektronické inženýrství, 2008-12)
    The possibility is studied of numerical modeling of magnetic field deformations in the environment of measured diamagnetic and paramagnetic samples for the purposes of studying magnetic resonance (MR) image deformations ...
  • Slotted PIFA for Mobile Communication Devices 

    Bonefacic, D.; Rapinac, B.; Bartolic, J. (Společnost pro radioelektronické inženýrství, 2008-12)
    Slotted PIFA with capacitive loading for operation in the 880 / 960 MHz band is presented. The PIFA is intended for mobile terminals in GSM mobile communication network. The antenna is placed on a ground plane with dimensions ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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, ...
  • EMC of Frequency Controlled Electric Drives 

    Novak, J.; Simanek, J.; Cerny, O.; Dolecek, R. (Společnost pro radioelektronické inženýrství, 2008-12)
    The paper deals with solution possibilities of EMC for voltage inverters, which uses PWM (Pulse Width Modulation). The paper offers solution of interference suppression which is raised by operation of frequency controlled ...
  • Adaptive Compensation of the Nonlinear Distortions in Optical Transmitters Using Predistortion 

    Panagiev, O. (Společnost pro radioelektronické inženýrství, 2008-12)
    The described method refers to compensation of nonlinear distortions, originating in laser diodes, used in wideband SCM-communication systems. Its essence is presenting in forming of a function that is opposite of the ...
  • Shielding Effectiveness of Laminated Shields 

    P. V. Y. Jayasree, V. S. S. N. S. Baba, B. P. Rao (Společnost pro radioelektronické inženýrství, 2008-12)
    Shielding prevents coupling of undesired radiated electromagnetic energy into equipment otherwise susceptible to it. In view of this, some studies on shielding effectiveness of laminated shields with conductors and conductive ...
  • Implementation and Evaluation of Power Consumption of an Iris Pre-processing Algorithm on Modern FPGA 

    Blasinsky, H.; Amiel, F.; Ea, T.; Rossant, F.; Mikovicova, B. (Společnost pro radioelektronické inženýrství, 2008-12)
    In this article, the efficiency and applicability of several power reduction techniques applied on a modern 65nm FPGA is described. For image erosion and dilation algorithms, two major solutions were tested and compared ...
  • Electronically Tunable Multi-Terminal Floating Nullor and Its Applications 

    Tangsrirat, W. (Společnost pro radioelektronické inženýrství, 2008-12)
    A realization scheme of an electronically tun- able multi-terminal floating nullor (ET-MTFN) is de- scribed in this paper. The proposed circuit mainly employs a transconductance amplifier, an improved translinear cell, two ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Using Volterra Series for an Estimation of Fundamental Intermodulation Products 

    Dobes, J. (Společnost pro radioelektronické inženýrství, 2008-12)
    The most precise procedure for determining the intermodulation products is to find a steady-state period of the signal first, and then to calculate its spectrum by means of the fast Fourier transform. However, this method ...
  • EMC Increasing of PWM Rectifier in Comparison with Classical Rectifier 

    Lettl, J.; Dolecek, R. (Společnost pro radioelektronické inženýrství, 2008-12)
    Pulse width modulated rectifier is a very popular topic nowadays. The modern industrial production demands continuous and lossless conversion of electrical energy parameters. This need leads to wide spread of power ...
  • A Monotonic Precise Current DAC for Sensor Applications 

    Horsky, P. (Společnost pro radioelektronické inženýrství, 2008-12)
    In this paper a 17 bit monotonic precise current DAC for sensor applications is described. It is working in a harsh automotive environment in a wide temperature range with high output voltage swing and low current consumption. ...
  • Universal Generator of Ultra-Wideband Pulses 

    Protiva, P.; Mrkvica, J.; Machac, J. (Společnost pro radioelektronické inženýrství, 2008-12)
    An Ultra-Wideband (UWB) subnanosecond pulse generator is described in this paper. High amplitude Gaussian pulses are generated by a Step Recovery Diode (SRD) included in a novel pulse forming circuit. The pro-posed circuit ...