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    Wyświetlanie 1-4 z 4
    Tytuł:
    New Synchronization Method for Transmission Systems with Variable Length of Bits
    Autorzy:
    Godek, J.
    Golański, R.
    Kołodziej, J.
    Stępień, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/226590.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    delta modulation
    adaptation
    non-uniform sampling
    synchronization
    codec
    Opis:
    Based on the Spartan 3E evaluation module, a flexible platform for the implementation of different algorithms for A/D conversion was developed. The aim of presented work was to improve the concept of the sampling rate adaptation to the input signal rate of change in terms of practical issues including synchronization of delta codecs. The new, original synchronization method, useful in systems dedicated for transmission of variable duration of bits was proposed and experimentally verified. Performed measures and observations have shown elimination of the synchronization lose phenomenon.
    Źródło:
    International Journal of Electronics and Telecommunications; 2015, 61, 1; 31-36
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synchronization of transmission systems with ANS-DM codecs
    Autorzy:
    Godek, Juliusz
    Golański, Ryszard
    Powiązania:
    https://bibliotekanauki.pl/articles/2014241.pdf
    Data publikacji:
    2021
    Wydawca:
    Państwowa Wyższa Szkoła Zawodowa w Tarnowie
    Tematy:
    delta modulation
    non-uniform sampling
    Adaptive Delta Modulation with Non-uniform Sampling (ANS-DM)
    ANS-DM
    digital PLL
    digital transmission
    one-bit codec delta
    modulacja delta
    nierównomierne próbkowanie
    cyfrowy PLL
    transmisja cyfrowa
    jednobitowy kodek delta
    Opis:
    Adaptive Delta Modulation with Non-uniform Sampling (ANS-DM) is one of the waveform coding techniques, where a sampling instant and a quantization step size are adapted to the signal. The ANS-DM modulator produces an output binary stream, that carries information about the signal and includes necessary data of coder parameters (sampling instant and quantization step). In the demodulator, these values are recovered for proper signal reconstruction. The paper reports the problem of synchronizing clocks (transmitting and receiving) in the (ANS-DM) delta codecs systems. The original synchronization method, valuable in systems dedicated to the transmission of the bits with variable time duration was projected and experimentally verified. Performed measurements and observations have shown the elimination of the synchronization loss phenomenon.
    Źródło:
    Science, Technology and Innovation; 2021, 12, 1; 37-44
    2544-9125
    Pojawia się w:
    Science, Technology and Innovation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ANSDM converters dynamic range design process
    Autorzy:
    Golański, Ryszard
    Godek, Juliusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1402376.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowa Wyższa Szkoła Zawodowa w Tarnowie
    Tematy:
    delta modulation
    non-uniform sampling
    SNR
    dynamic range
    Lambert W function
    sampling interval
    Maple
    modulacja delta
    nierównomierne próbkowanie
    zakres dynamiczny
    funkcja Lamberta
    odstęp próbkowania
    Opis:
    The results of analytic and simulating works proved that for nonstationary sources, the delta converters with adaptive sampling expose higher coding efficiency than the former proposals, based on uniform sampling methods. The knowledge of the sampling interval range and the algorithm of the Nonuniform Sampling Delta Modulation and Adaptive Nonuniform Sampling Delta Modulation allows finding the necessary number of the sampling intervals and their values that maximizes SNR. The total dynamic range of the ANSDM modulator is the product of the dynamic range both from sampling interval and step size adaptation. Due to the high complexity of the calculations, the ANSDMsoft program was developed to support computing. All computational works were carried out using the Maple environment. Maple allows to solve complex mathematical functions and display their results in a simple way. Most importantly, it supports the LambertW function, used in the computing of NSDM or ANSDM modulators parameters. Graphic illustrations of the NSDM and ANSDM modulator dynamic range as a function of the minimum and maximum sampling frequency are presented.
    Źródło:
    Science, Technology and Innovation; 2020, 10, 3; 1-7
    2544-9125
    Pojawia się w:
    Science, Technology and Innovation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Decomposition of Gaussian processes, and factorization of positive definite kernels
    Autorzy:
    Jorgensen, Palie E. T.
    Tian, Feng
    Powiązania:
    https://bibliotekanauki.pl/articles/255819.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    reproducing kernel Hilbert space frames
    generalized Ito-integration
    the measurable category analysis/synthesis
    interpolation
    Gaussian free fields
    non-uniform sampling
    optimization
    transform
    covariance
    feature space
    Opis:
    We establish a duality for two lactorization questions, one for general positive definite (p.d.) kernels K, and the other for Gaussian processes, say V. The latter notion, for Gaussian processes is stated via Ito-integration. Our approach to factorization for p.d. kernels is intuitively motivated by matrix factorizations, but in infinite dimensions, subtle measure theoretic issues must be addressed. Consider a given p.d. kernel K, presented as a covariance kernel for a Gaussian process V. We then give an explicit duality for these two seemingly different notions of factorization, for p.d. kernel K, vs for Gaussian process V. Our result is in the form of an explicit correspondence. It states that the analytic data which determine the variety of factorizations for K is the exact same as that which yield factorizations for V. Examples and applications are included: point-processes, sampling schemes, constructive discretization, graph-Laplacians, and boundary-value problems.
    Źródło:
    Opuscula Mathematica; 2019, 39, 4; 497-541
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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