Browsing 2008/4 by Title
Now showing items 1-20 of 33
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ACE Strategy with Virtual Channels
(Společnost pro radioelektronické inženýrství, 2008-12)Cochlear implant is an electronic device, which can mediate hearing sensations to profoundly deaf people. Contemporary cochlear implants are sophisticated electronic devices; however, their performance could still be ... -
Active Elements for Analog Signal Processing: Classification, Review, and New Proposals
(Společnost pro radioelektronické inženýrství, 2008-12)In the paper, an analysis of the state-of-the-art of active elements for analog signal processing is presented which support – in contrast to the conventional operational amplifiers – not only the voltage-mode but also the ... -
Adaptive Compensation of the Nonlinear Distortions in Optical Transmitters Using Predistortion
(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 ... -
Application of a Cumulative Method for Car Borders Specification in Image
(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 ... -
Characterization of Nonlinear Integrated Capacitors
(Společnost pro radioelektronické inženýrství, 2008-12)The paper deals with a modified CBCM (Charge-Based Capacitance Measurements) method for nonlinear capacitance characterization. The method is characterized by high resolution although it is based on equipment found in any ... -
Coexistence of Terrestrial and HAP 3G Networks during Disaster Scenarios
(Společnost pro radioelektronické inženýrství, 2008-12)The aim of this paper is to show the possible coexistence of an HAP and a terrestrial component of 3G networks at a single carrier frequency. The main goal is to compare the basic parameters of terrestrial and HAP com-ponent ... -
Design of Microstrip Band Pass Fractal Filter for Suppression of Spurious Band
(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 ... -
An Efficient Finger Allocation Method for the Maximum Likelihood RAKE Receiver
(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 ... -
Electronically Tunable Multi-Terminal Floating Nullor and Its Applications
(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 ... -
EMC Increasing of PWM Rectifier in Comparison with Classical Rectifier
(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 ... -
EMC of Frequency Controlled Electric Drives
(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 ... -
Enhancement of Optical Coherence Tomography Images of the Retina by Normalization and Fusion
(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
(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 ... -
Implementation and Evaluation of Power Consumption of an Iris Pre-processing Algorithm on Modern FPGA
(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 ... -
Implementation of Industrial Narrow Band Communication System into SDR Concept
(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 ... -
A Monotonic Precise Current DAC for Sensor Applications
(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. ... -
A New Application of Current Conveyors: The Design of Wideband Controllable Low-Noise Amplifiers
(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 ... -
A New CAC Method Using Queuing Theory
(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, ... -
Numerical Modeling of Magnetic Field Deformation as Related to Susceptibility Measured with an MR System
(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 ... -
Optimization of Micro Strip Array Antennas Using Hybrid Particle Swarm Optimizer with Breeding and Subpopulation for Maximum Side-Lobe Reduction
(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 ...