Poslední příspěvky

  • Real-Time Guitar Preamp Simulation Using Modified Blockwise Method and Approximations 

    Mačák, Jaromír; Schimmel, Jiří (Springer Nature, 2011-04-07)
    The designing of algorithms for real-time digital simulation of analog effects and amplifiers brings two contradictory requirements: accuracy versus computational efficiency. In this paper, the simulation of a typical ...
  • Goertzel Algorithm Generalized to Non-integer Multiples of Fundamental Frequency 

    Sysel, Petr; Rajmic, Pavel (SpringerOpen, 2012-03-22)
    The paper deals with the Goertzel algorithm, used to establish the modulus and phase of harmonic components of a signal. The advantages of the Goertzel approach over the DFT and the FFT in cases of a few harmonics of ...
  • S-SPADE Done Right: Detailed Study of the Sparse Audio Declipper Algorithms 

    Záviška, Pavel; Mokrý, Ondřej; Rajmic, Pavel (2018-09-26)
    This technical report shows and discusses in detail how Sparse Audio Declipper (SPADE) algorithms are (and should be) derived from the signal model using the ADMM approach. The analysis version (A-SPADE) of Kitic et. al. ...
  • Orthogonality is superiority in piecewise-polynomial signal segmentation and denoising 

    Novosadová, Michaela; Rajmic, Pavel; Šorel, Michal (Springer Open, 2019-01-25)
    Segmentation and denoising of signals often rely on the polynomial model which assumes that every segment is a polynomial of a certain degree and that the segments are modeled independently of each other. Segment borders ...
  • Analysis and Verification of Identical-Order Mixed-Matrix Fractional-Order Capacitor Networks 

    Kartci, Aslihan; Agambayev, Agamyrat; Herencsár, Norbert; Salama, Khaled Nabil (IEEE, 2018-07-02)
    In the open literature while capacitors are introduced with -90 degrees phase angle, here we described our fabricated polymer composite, mixed matrix, as a fractional-order capacitor (FoC). The effect on phase and ...
  • Fractional-Order Hartley Oscillator 

    Agambayev, Agamyrat; Kartci, Aslihan; Hassan, Ali H.; Herencsár, Norbert; Bagci, Hakan; Salama, Khaled Nabil (IEEE, 2018-07-02)
    A fractional-order capacitor (FOC) is developed using a Molybdenum disulfide ferroelectric polymer composite. The fabricated FOC exhibits constant phase over five decades between 100 Hz-10 MHz, which is the broadest operating ...
  • Validation of Fractional-Order Lowpass Elliptic Responses of (1 + )-Order Analog Filters 

    Kubánek, David; Freeborn, Todd; Koton, Jaroslav; Dvořák, Jan (MDPI, 2018-12-13)
    In this paper, fractional-order transfer functions to approximate the passband and stopband ripple characteristics of a second-order elliptic lowpass filter are designed and validated. The necessary coefficients for these ...
  • Changes in Phonation and Their Relations with Progress of Parkinson’s Disease 

    Galáž, Zoltán; Mekyska, Jiří; Zvončák, Vojtěch; Mucha, Ján; Kiska, Tomáš; Smékal, Zdeněk; Eliášová, Ilona; Mráčková, Martina; Košťálová, Miroslava; Rektorová, Irena; Faúndez Zanuy, Marcos; Alonso-Hernandez, Jesus; Gomez-Vilda, Pedro (MDPI, 2019-01-22)
    Hypokinetic dysarthria, which is associated with Parkinson’s disease (PD), affects several speech dimensions, including phonation. Although the scientific community has dealt with a quantitative analysis of phonation in ...
  • Identification and Monitoring of Parkinson’s Disease Dysgraphia Based on Fractional-Order Derivatives of Online Handwriting 

    Mucha, Ján; Mekyska, Jiří; Galáž, Zoltán; Faúndez Zanuy, Marcos; Lopez-de-Ipina, Karmele; Zvončák, Vojtěch; Kiska, Tomáš; Smékal, Zdeněk; Brabenec, Luboš; Rektorová, Irena (MDPI, 2019-01-11)
    Parkinson’s disease dysgraphia affects the majority of Parkinson’s disease (PD) patients and is the result of handwriting abnormalities mainly caused by motor dysfunctions. Several effective approaches to quantitative PD ...
  • Traffic Similarity Observation Using a Genetic Algorithm and Clustering 

    Oujezský, Václav; Horváth, Tomáš (MDPI, 2018-11-11)
    This article presents a technique of traffic similarity observation based on the statistical method of survival analysis by using a genetic algorithm. The basis comes from the k-means clustering algorithm. The observed ...
  • The Value of Geographic Locations Submitted by Internet Users 

    Komosný, Dan; Mehic, Miralem (IEEE, 2018-10-22)
    Internet users may be asked to manually provide their contact details including city or full postal address. Examples include use of trial/free applications and services, filling out on-line surveys and petitions, and ...
  • Design and Analysis of CCII-Based Oscillator with Amplitude Stabilization Employing Optocouplers for Linear Voltage Control of the Output Frequency 

    Šotner, Roman; Jeřábek, Jan; Langhammer, Lukáš; Dvořák, Jan (MDPI, 2018-08-22)
    This paper shows the topology design of a simple second-order oscillator based on two three-port current conveyors, two resistors, and two grounded capacitors, as well as its modification to a voltage-controlled oscillator ...
  • A Practical Perspective on 5G-Ready Highly Dynamic Spectrum Management with LSA 

    Mašek, Pavel; Mokrov, Evgeny; Zeman, Kryštof; Ponomarenko-Timofeev, Aleksei; Pyattaev, Alexander; Nesterov, Sergey; Andreev, Sergey; Hošek, Jiří; Samouylov, Konstantin; Koucheryavy, Yevgeni (Hindawi, 2018-07-24)
    A diversity of wireless technologies will collaborate to support the fifth-generation (5G) communication networks with their demanding applications and services. Despite decisive progress in many enabling solutions, ...
  • Resistorless Current-Mode First-Order All-Pass Filter with Electronic Tuning Employing Low-Voltage CBTA and Grounded Capacitor 

    Herencsár, Norbert; Koton, Jaroslav; Lahiri, Abhirup; Ayten, Umut E.; Sagbas, Mehmet (World Scientific Publishing Company, 2018-02-01)
    In this paper, a new realization of a current-mode first-order all-pass filter (APF) using a single active building block (ABB) and one grounded capacitor is presented. As the ABB, the current backward transconductance ...
  • Comparative Study of Discrete Component Realizations of Fractional-Order Capacitor and Inductor Active Emulators 

    Tsirimokou, Georgia; Kartci, Aslihan; Koton, Jaroslav; Herencsár, Norbert; Psychalinos, Costas (World Scientific, 2018-02-06)
    Due to the absence of commercially available fractional-order capacitors and inductors, their implementation can be performed using fractional-order differentiators and integrators, respectively, combined with a ...
  • Fractional-Order Low-Pass Filter with Electronic Tunability of Its Order and Pole Frequency 

    Langhammer, Lukáš; Dvořák, Jan; Jeřábek, Jan; Koton, Jaroslav; Šotner, Roman (FEI STU Bratislava, 2018-02-27)
    This paper presents novel solution of a fractional-order low-pass filter (FLPF). The proposed filter operates in the current mode and it is designed using third-order inverse follow-the-leader feedback topology and operational ...
  • Internet Geography and Real Estate Market 

    Komosný, Dan; Bulín, Martin; Ilgner, Petr (IEEE, 2017-11-09)
    This paper introduces a new spatial data resource for Internet geography. The idea is based on merging two up-to-now unrelated fields - the real estate market and Internet networking. The huge real estate market is present ...
  • Electronically Reconfigurable Universal Filter Based on VDTAs 

    Langhammer, Lukáš; Šotner, Roman; Domanský, Ondřej; Hricko, Tomáš (IEEE, 2018-04-19)
    The proposed filter extends features of the previously presented Voltage Differencing Transconductance Amplifiers (VDTAs)-based frequency filter. It brings the new advantage of an electronic reconfiguration of its transfer. ...
  • Fully differential first-order allpass filters using a DDCC 

    Horng, Jiun-Wei; Wu, Chang-Ming; Herencsár, Norbert (NISCAIR-CSIR, 2014-08-01)
    Two voltage-mode high input impedance differential input-differential output first-order allpass filters based on differential difference current conveyor (DDCC) are presented. Each of the proposed circuit uses one plus-type ...
  • A Novel Pseudo-Differential Integer/Fractional-Order Voltage-Mode All-Pass Filter 

    Herencsár, Norbert; Šotner, Roman; Kartci, Aslihan; Vrba, Kamil (IEEE, 2018-05-08)
    The paper presents the first- (integer) and fractional-order case studies of a novel pseudo-differential (P-D) voltage-mode all-pass filter (APF) employing a single differential voltage current conveyor (DVCC), one resistor, ...

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