Now showing items 41-60 of 71

  • MATLAB-based Applications for Image Processing and Image Quality Assessment – Part II: Experimental Results 

    Krasula, L.; Klima, M.; Rogard, E.; Jeanblanc, E. (Společnost pro radioelektronické inženýrství, 2012-04)
    The paper provides an overview of some possible usage of the software described in the Part I. It contains the real examples of image quality improvement, distortion simulations, objective and subjective quality assessment ...
  • Measurement and Analysis of Real Imaging Systems 

    Mojzis, F.; Svihlik, J.; Fliegel, K.; Knazovicka, L.; Jerhotova, E. (Společnost pro radioelektronické inženýrství, 2012-04)
    This paper is devoted to statistical analysis of noise generated in real imaging systems and noise suppression methods. The introductory part is focused on description of imaging systems, image degradations, and noise types ...
  • Measurement of the Structure Constant of Refractivity at Optical Wavelengths Using a Scintillometer 

    Grabner, M.; Kvicera, V. (Společnost pro radioelektronické inženýrství, 2012-04)
    The structure constant of the atmospheric refractive index is used for characterizing the turbulence strength and for predicting the scintillation of electromagnetic waves in atmosphere. It is measured continuously in ...
  • The Modelling of Stereoscopic 3D Scene Acquisition 

    Hasmanda, M.; Riha, K. (Společnost pro radioelektronické inženýrství, 2012-04)
    The main goal of this work is to find a suitable method for calculating the best setting of a stereo pair of cameras that are viewing the scene to enable spatial imaging. The method is based on a geometric model of a stereo ...
  • Mutual Interference of Frequency Hopping with Collision Avoidance Systems 

    Pust, R.; Burda, K. (Společnost pro radioelektronické inženýrství, 2012-04)
    The aim of this article is to quantify and analyze mutual interference of Frequency Hopping with Collision Avoidance (FH/CA) systems. The FH/CA system is a frequency hopping system where stations select the least jammed ...
  • New CMOS Realization of Voltage Differencing Buffered Amplifier and Its Biquad Filter Applications 

    Kaçar, F.; Yeşil, A.; Noori, A. (Společnost pro radioelektronické inženýrství, 2012-04)
    In this paper, new biquad filter configuration using a recently introduced active element, namely Voltage Differencing Buffered Amplifier (VDBA), is proposed. This block has high impedance input terminals and low impedance ...
  • New Gain Controllable Resistor-less Current-mode First Order Allpass Filter and its Application 

    Jaikla, W.; Noppakarn, A.; Lawanwisut, S. (Společnost pro radioelektronické inženýrství, 2012-04)
    New first order allpass filter (APF) in current mode, constructed from 2 CCCCTAs and grounded capacitor, is presented. The current gain and phase shift can be electronically /orthogonally controlled. Low input and high ...
  • A New Model of Multiphonon Excitation Trap-Assisted Band-to-Band Tunneling 

    Racko, J.; Mikolasek, M.; Grmanova, A.; Breza, J.; Benko, P.; Gallo, O.; Harmatha, L. (Společnost pro radioelektronické inženýrství, 2012-04)
    The paper describes a new approach to calculating the currents in a pn-diode based on the extension of the Shockley-Read-Hall recombination-generation model. The presented theory is an alternative to Schenk’s model of ...
  • New Universal Current-mode Biquad Using Only Three ZC-CFTAs 

    Singh, B.; Singh, A. K.; Senani, R. (Společnost pro radioelektronické inženýrství, 2012-04)
    The objective of this paper is to present a new universal Current-mode biquad capable of providing all the five basic filter functions, namely, low pass (LP), Band pass (BP), high pass (HP), Band reject (BR) and all pass ...
  • Noise Measurement Setup for Quartz Crystal Microbalance 

    Sedlak, P.; Majzner, J.; Sikula, J.; Hajek, K. (Společnost pro radioelektronické inženýrství, 2012-04)
    Quartz crystal microbalance (QCM) is a high sensitive chemical sensor which has found widespread spectrum of applications. There are several mechanisms that are related to fluctuation phenomena. Since the aim of our research ...
  • Novel Compact and High Selectivity Dual-band BPF with Wide Stopband 

    Wang, L.; Guan, B.-R. (Společnost pro radioelektronické inženýrství, 2012-04)
    A novel type of compact and high selectivity dual-band bandpass filter (BPF) incorporating a dual-mode defected ground structure resonator (DDGSR) and a dual-mode open-stub loaded stepped impedance resonator (DOLSIR) is ...
  • Novel Floating General Element Simulators Using CBTA 

    Ayten, U. E.; Sagbas, M.; Herencsar, N.; Koton, J. (Společnost pro radioelektronické inženýrství, 2012-04)
    In this study, a novel floating frequency dependent negative resistor (FDNR), floating inductor, floating capacitor and floating resistor simulator circuit employing two CBTAs and three passive components is proposed. The ...
  • A Novel Variable Step Size Adjustment Method Based on Autocorrelation of Error Signal for the Constant Modulus Blind Equalization Algorithm 

    Demir, M. A.; Ozen, A. (Společnost pro radioelektronické inženýrství, 2012-04)
    Blind equalization is a technique for adaptive equalization of a communication channel without the use of training sequence. Although the constant modulus algorithm (CMA) is one of the most popular adaptive blind equalization ...
  • Opportunistic Relaying in Time Division Broadcast Protocol with Incremental Relaying 

    Xu, K.; Gao, Y.; Yi, X.; Pan, Y.; Zhang, Y.; Su, S. (Společnost pro radioelektronické inženýrství, 2012-04)
    In this paper, we investigate the performance of time division broadcast protocol (TDBC) with incremental relaying (IR) when there are multiple available relays. Opportunistic relaying (OR), i.e., the “best” relay is select ...
  • Optimal Piecewise-Linear Approximation of the Quadratic Chaotic Dynamics 

    Petrzela, J. (Společnost pro radioelektronické inženýrství, 2012-04)
    This paper shows the influence of piecewise-linear approximation on the global dynamics associated with autonomous third-order dynamical systems with the quadratic vector fields. The novel method for optimal nonlinear ...
  • Overview of Parallel Platforms for Common High Performance Computing 

    Fryza, T.; Svobodova, J.; Adamec, F.; Marsalek, R.; Prokopec, J. (Společnost pro radioelektronické inženýrství, 2012-04)
    The paper deals with various parallel platforms used for high performance computing in the signal processing domain. More precisely, the methods exploiting the multicores central processing units such as message passing ...
  • Performance Analysis of SSC Diversity Receiver over Correlated Hoyt Fading Channels 

    Bandjur, M.; Bandjur, D. (Společnost pro radioelektronické inženýrství, 2012-04)
    An infinite-series-based approach for the performance analysis of a dual-branch switched-and-stay combining (SSC) diversity receiver operating over correlated Hoyt fading channels is presented. The performance analysis is ...
  • Print-Scan Resilient Text Image Watermarking Based on Stroke Direction Modulation for Chinese Document Authentication 

    Tan, L.; Sun, X.; Sun, G. (Společnost pro radioelektronické inženýrství, 2012-04)
    Print-scan resilient watermarking has emerged as an attractive way for document security. This paper proposes an stroke direction modulation technique for watermarking in Chinese text images. The watermark produced by the ...
  • Realization of Resistorless Lossless Positive and Negative Grounded Inductor Simulators Using Single ZC-CCCITA 

    Herencsar, N.; Lahiri, A.; Koton, J.; Vrba, K.; Metin, B. (Společnost pro radioelektronické inženýrství, 2012-04)
    This paper is in continuation with the very recent work of Prasad et al. [14], wherein new realizations of grounded and floating positive inductor simulator using current differencing transconductance amplifier (CDTA) are ...
  • Reliable and Efficient Procedure for Steady-State Analysis of Nonautonomous and Autonomous Systems 

    Dobes, J.; Biolková, Viera (Společnost pro radioelektronické inženýrství, 2012-04)
    The majority of contemporary design tools do not still contain steady-state algorithms, especially for the autonomous systems. This is mainly caused by insufficient accuracy of the algorithm for numerical integration, but ...