Počet záznamů: 1  

Noise properties of Hilbert transform evaluation

  1. 1.
    0455229 - FZÚ 2016 RIV GB eng J - Článek v odborném periodiku
    Pavlíček, Pavel - Svak, V.
    Noise properties of Hilbert transform evaluation.
    Measurement Science and Technology. Roč. 26, č. 8 (2015), s. 085207. ISSN 0957-0233. E-ISSN 1361-6501
    Grant CEP: GA ČR GA13-12301S
    Institucionální podpora: RVO:68378271
    Klíčová slova: Hilbert transform * noise * measurement uncertainty * white-light interferometry * fringe-pattern analysis
    Kód oboru RIV: BH - Optika, masery a lasery
    Impakt faktor: 1.492, rok: 2015

    The Hilbert transform is a standard method for the calculation of the envelope and phase of a modulated signal in optical measurement methods. Usually, the intensity of light is converted into an electric signal at a detector. Therefore the actual spatially or temporally sampled signal is always affected by noise. Because the noise values of individual samples are independent, the noise can be considered as white. If the envelope and phase are calculated from the noised signal, they will also be affected by the noise. We calculate the variance and spectral density of both the envelope noise and the phase noise. We determine which parameters influence the variance and spectral density of both the envelope noise and the phase noise. Finally, we determine the influence of the noise on the measurement uncertainty in white-light interferometry and fringe-pattern analysis.

    Trvalý link: http://hdl.handle.net/11104/0255879

     
     
Počet záznamů: 1  

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