Посмотр 2013/1 по дате публикации
Отображаемые элементы 1-20 из 52
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Compact Elliptically Tapered Slot Antenna with Non-uniform Corrugations for Ultra-wideband Applications
(Společnost pro radioelektronické inženýrství, 2013-04)A small size elliptically tapered slot antenna (ETSA) fed by coplanar waveguide (CPW) for ultra-wideband (UWB) applications is proposed. It is printed on an FR4 substrate and occupies a size of 37×34×0.8 mm³. A pair of ... -
Biquadratic Filter Applications Using a Fully-Differential Active-Only Integrator
(Společnost pro radioelektronické inženýrství, 2013-04)A new class of active filters, real active-only filters is described and possible implementation issues of these filters are discussed. To remedy these issues, a fully-differential active-only integrator block built around ... -
Interest Points as a Focus Measure in Multi-Spectral Imaging
(Společnost pro radioelektronické inženýrství, 2013-04)A novel multi-spectral focus measure that is based on algorithms for interest point detection, particularly on the FAST (Features from Accelerated Segment Test), Fast Hessian and Harris-Laplace detector, is described in ... -
Determination of Formant Features in Czech and Slovak for GMM Emotional Speech Classifier
(Společnost pro radioelektronické inženýrství, 2013-04)The paper is aimed at determination of formant features (FF) which describe vocal tract characteristics. It comprises analysis of the first three formant positions together with their bandwidths and the formant tilts. ... -
Musical Instrument Classification Based on Nonlinear Recurrence Analysis and Supervised Learning
(Společnost pro radioelektronické inženýrství, 2013-04)In this paper, the phase space reconstruction of time series produced by different instruments is discussed based on the nonlinear dynamic theory. The dense ratio, a novel quantitative recurrence parameter, is proposed to ... -
3D Reconstruction: Novel Method for Finding of Corresponding Points using Pseudo Colors
(Společnost pro radioelektronické inženýrství, 2013-04)This paper deals with the reconstruction of spatial coordinates of an arbitrary point in a scene using two images scanned by a 3D camera or two displaced cameras. Calculations are based on the perspective geom-etry. Accurate ... -
Log-domain All-pass Filter-based Multiphase Sinusoidal Oscillators
(Společnost pro radioelektronické inženýrství, 2013-04)Log-domain current-mode multiphase sinusoidal oscillators based on all-pass filters are presented in this paper. The first-order differential equation is used for obtaining inverting and non-inverting all-pass filters. The ... -
A New Step Size Control Technique for Blind and Non-Blind Equalization Algorithms
(Společnost pro radioelektronické inženýrství, 2013-04)A new variable step size (VSS) control technique employing cross correlation between channel output and error signal has been proposed as a solution to the problem of slow convergence of blind and non-blind equalization ... -
A Novel Approach to Face Recognition using Image Segmentation based on SPCA-KNN Method
(Společnost pro radioelektronické inženýrství, 2013-04)In this paper we propose a novel method for face recognition using hybrid SPCA-KNN (SIFT-PCA-KNN) approach. The proposed method consists of three parts. The first part is based on preprocessing face images using Graph Based ... -
A New Low Complexity Uniform Filter Bank Based on the Improved Coefficient Decimation Method
(Společnost pro radioelektronické inženýrství, 2013-04)In this paper, we propose a new uniform filter bank (FB) based on the improved coefficient decimation method (ICDM). In the proposed FB’s design, the ICDM is used to obtain different multi-band frequency responses using a ... -
Current and Voltage Mode Multiphase Sinusoidal Oscillators Using CBTAs
(Společnost pro radioelektronické inženýrství, 2013-04)Current-mode (CM) and voltage-mode (VM) multiphase sinusoidal oscillator (MSO) structures using current backward transconductance amplifier (CBTA) are proposed. The proposed oscillators can generate n current or voltage ... -
Notch Filtering Suitable for Real Time Removal of Power Line Interference
(Společnost pro radioelektronické inženýrství, 2013-04)This paper presents a high performance notch filtering for real time suppression of power line interference in a general signal. The disturbing signal is suppressed using an optimal notch FIR filter with tunable notch ... -
Thick-Film and LTCC Passive Components for High-Temperature Electronics
(Společnost pro radioelektronické inženýrství, 2013-04)At this very moment an increasing interest in the field of high-temperature electronics is observed. This is a result of development in the area of wide-band semiconductors’ engineering but this also generates needs for ... -
Acoustic Echo and Noise Cancellation System for Hand-Free Telecommunication using Variable Step Size Algorithms
(Společnost pro radioelektronické inženýrství, 2013-04)In this paper, acoustic echo cancellation with doubletalk detection system is implemented for a hand-free telecommunication system using Matlab. Here adaptive noise canceller with blind source separation (ANC-BSS) system ... -
Implementation of a Two-Channel Maximally Decimated Filter Bank using Switched Capacitor Circuits
(Společnost pro radioelektronické inženýrství, 2013-04)The aim of this paper is to describe the implementation of a two-channel filter bank (FB) using the switched capacitor (SC) technique considering real properties of operational amplifiers (OpAmps). The design procedure is ... -
Design and Modeling of Symmetric Three Branch Polymer Planar Optical Power Dividers
(Společnost pro radioelektronické inženýrství, 2013-04)Two types of polymer-based three-branch symmetric planar optical power dividers (splitters) were designed, multimode interference (MMI) splitter and triangular shape-spacing splitter. By means of modeling the real structures ... -
Comparison of the Intrinsic Characteristics of LTCC and Silicon Pressure Sensors by Means of 1/f Noise Measurements
(Společnost pro radioelektronické inženýrství, 2013-04)A pressure sensor with high resolution is of key importance for precise measurements in the low-pressure range. The intrinsic resolution of piezoresistive ceramic pressure sensors (CPSs) mainly depends on their func¬tional ... -
Simple Solution for Designing the Piecewise Linear Scalar Companding Quantizer for Gaussian Source
(Společnost pro radioelektronické inženýrství, 2013-04)To overcome the difficulties in determining an inverse compressor function for a Gaussian source, which appear in designing the nonlinear optimal companding quantizers and also in the nonlinear optimal companding quantization ... -
A Box-Counting Method with Adaptable Box Height for Measuring the Fractal Feature of Images
(Společnost pro radioelektronické inženýrství, 2013-04)Most of the existing box-counting methods for measuring fractal features are only applicable to square images or images with each dimension equal to the power of 2 and require that the box at the top of the box stack of ... -
Trap-Assisted Tunneling in the Schottky Barrier
(Společnost pro radioelektronické inženýrství, 2013-04)The paper presents a new way how to calculate the currents in a Schottky barrier. The novel phenomeno-logical model extends the Shockley-Read-Hall recombi-nation-generation theory of trap-assisted tunneling. The proposed ...