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Search results for: WIDEBAND SIGNALS

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Search results for: WIDEBAND SIGNALS

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    * technologie archiwizacji, rekonstrukcji i dostępu do nagrań archiwalnych * technologie inteligentnego monitoringu wizyjnego i akustycznego * multimedialne technologie telemedyczne * multimodalne interfejsy komputerowe

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Search results for: WIDEBAND SIGNALS

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Search results for: WIDEBAND SIGNALS

  • Laboratory Stand for Wideband Analysis Radiocommunication Signals

    Publication

    - Year 2012

    A laboratory stand for wideband analysis radiocommunication signals is presented in the paper. The stand is designed for signals acquisition in wide spectrum and research a field of digital signal processing. Procedures used for simultaneous acquiring many frequency channels in selected wide band are described. The method of detection of direct sequence spread spectrum signals (DS SS) which power spectral density is lower than...

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  • Laboratory stand for wideband analysis radiocommunication signals

    Publication

    - Year 2011

    A laboratory stand for wideband analysis radiocommunication signals is presented in the paper. The stand is designed for signals acquisition in wide spectrum and research a field of digital signal processing. Procedures used for simultaneous acquiring many frequency channels in selected wide band are described. The method of detection of direct sequence spread spectrum signals (DS SS) which power spectral density is lower than...

    Full text to download in external service

  • Ultra-Wideband Vivaldi Antenna with an Integrated Noise-Rejecting Parasitic Notch Filter for Online Partial Discharge Detection

    Publication
    • S. M. Kameli
    • S. S. Refaat
    • H. Abu-Rub
    • A. Darwish
    • A. Ghrayeb
    • M. Olesz

    - IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT - Year 2024

    Power transformers and gas-insulated switchgear (GIS) play crucial roles in electrical power grids. However, they may suffer from degradation of insulation material due to wear and tear, leading to their imminent failure. Partial discharges (PDs) are an initial sign of insulation materials degradation which emit signals spanning various physical domains, including electromagnetic. PDs are temporally narrow, high-frequency, stochastic...

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  • Estimation of Coherence Bandwidth for Underwater Acoustic Communication Channel

    Publication

    A shallow underwater acoustic communication channel is characterized by strong multipath propagation. The signal reaching the receiver consists of a direct waveform and a number of its delayed and suppressed replica. A significant time dispersion of the transmitted signal and selective fading of its spectrum are observed. Coherence bandwidth defines maximal bandwidth, wherein the channel amplitude characteristic remains constant...

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  • Ultrawideband transmission in physical channels: a broadband interference view

    Publication

    The superposition of multipath components (MPC) of an emitted wave, formed by reflections from limiting surfaces and obstacles in the propagation area, strongly affects communication signals. In the case of modern wideband systems, the effect should be seen as a broadband counterpart of classical interference which is the cause of fading in narrowband systems. This paper shows that in wideband communications, the time- and frequency-domain...

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