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Wyszukujesz frazę "impulse line" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Impulse Noise Suppression Based on Power Iterative ICA in Power Line Communication
Autorzy:
Zhang, Wei
Luo, Zhongqiang
Xiong, Xingzhong
Powiązania:
https://bibliotekanauki.pl/articles/226439.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
power line communication(PLC)
orthogonal frequency division multiplexing(OFDM) signal
independent component analysis(ICA)
impulse noise
Opis:
To overcome the detrimental influence of impulse noise in power line communication and the trap of scarce prior information in traditional noise suppression schemes , a power iteration based fast independent component analysis (PowerICA) based noise suppression scheme is designed in this paper. Firstly, the pseudo-observation signal is constructed by weighted processing so that single-channel blind separation model is transformed into the multi-channel observed model. Then the proposed blind separation algorithm is used to separate noise and source signals. Finally, the effectiveness of the proposed algorithm is verified by experiment simulation. Experiment results show that the proposed algorithm has better separation effect, more stable separation and less implementation time than that of FastICA algorithm, which also improves the real-time performance of communication signal processing.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 4; 651-656
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of flow pulsations on the accuracy of differential pressure flowmeters
Autorzy:
Kostyk, I.
Matiko, F.
Fedoryshyn, R.
Powiązania:
https://bibliotekanauki.pl/articles/115923.pdf
Data publikacji:
2017
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
flow
pulsations
impulse line
resonance
error
differential pressure flowmeter
przepływ
pulsacje
linia impulsu
rezonans
błąd
przepływomierz różnicowy
Opis:
This work deals with investigation of influence of flow pulsation on the accuracy of gas flow rate and volume measurement by means of the differential pressure flow meters. Experimental studies of the step response curves of an impulse line with a pressure transducer (PT) were carried out with application of a high-frequency analog-to-digital converter of the pressure signal in the PT chamber. Mathematical model of an impulse line with a PT was built. This model provides simulation and investigation of the transient processes with high accuracy. The influence of the impulse line design (length, diameter) on the step response curves and on the frequency response curves as well as on the resonant frequency of the oscillating system (an impulse line with a PT chamber) was studied. The systematic errors of flow rate and volume measurement due to the resonance in the impulse lines which was caused by flow pulsation were simulated and studied for an acting differential pressure natural gas metering system. On the basis of the calculation results it was defined that amplification of the amplitude of the oscillating signal of the differential pressure due to the resonance may lead to a negative systematic error of gas volume measurement. The systematic errors of gas flow rate and volume measurement caused by the flow pulsation can be reduced by choosing the correct design of the impulse lines in order to avoid the resonance.
Źródło:
Challenges of Modern Technology; 2017, 8, 1; 23-31
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative Modelling Studies of 400 MHz ST-X Quartz SAW Delay Lines for Potential Gas Sensing Applications
Autorzy:
Thirumal, V.
Raju, B.
Gandhi, P.
Pandya, H. M.
Powiązania:
https://bibliotekanauki.pl/articles/177740.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
surface acoustic wave
SAW delay line
impulse response model
equivalent circuit model
coupling-of-modes
COM model
SAW sensors
Opis:
Surface Acoustic Wave (SAW) devices like delay lines, filters, resonators etc., are nowadays extensively used as principal solid state components in many electronic applications and chemical vapour sensors. To bring out the best from these SAW devices, computational design and modelling are resorted too. The present paper proposes the modelling of 400 MHz ST-X Quartz based SAW delay line, by three models namely, Impulse Response Model (IRM), Crossed-field Equivalent Circuit Model (ECM) and Coupling-of-Modes (COM) model. MATLAB® is employed as a computational tool to model the experimental output of the SAW device. A comparative discussion of the modelled device results is also provided.
Źródło:
Archives of Acoustics; 2018, 43, 2; 153-161
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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