Karol Abratkiewicz - Publications - Bridge of Knowledge

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Year 2019
Year 2017
  • Estimation of time-frequency complex phase-based speech attributes using narrow band filter banks
    Publication

    - Year 2017

    In this paper, we present nonlinear estimators of nonstationary and multicomponent signal attributes (parameters, properties) which are instantaneous frequency, spectral (or group) delay, and chirp-rate (also known as instantaneous frequency slope). We estimate all of these distributions in the time-frequency domain using both finite and infinite impulse response (FIR and IIR) narrow band filers for speech analysis. Then, we present...

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  • Sonar Pulse Detection Using Chirp Rate Estimation and CFAR Algorithms
    Publication

    This paper presents a new approach to sonar pulse detection. The method uses chirp rate estimators and algorithms for the adaptive threshold, commonly used in radiolocation. The proposed approach allows detection of pulses of unknown parameters, which may be used in passive hydrolocation or jamming detection in underwater communication. Such an analysis is possible thanks to a new kind of imaging, which presents signal energy in...

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