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dc.creatorKalauzi, Aleksandar
dc.creatorBojić, Tijana
dc.creatorVučković, Aleksandra
dc.date.accessioned2018-03-01T22:34:59Z
dc.date.available2018-03-01T22:34:59Z
dc.date.issued2012
dc.identifier.issn0140-0118
dc.identifier.urihttps://vinar.vin.bg.ac.rs/handle/123456789/4908
dc.description.abstractThe exact mathematical relationship between FFT spectrum and fractal dimension (FD) of an experimentally recorded signal is not known. In this work, we tried to calculate signal FD directly from its Fourier amplitudes. First, dependence of Higuchis FD of mathematical sinusoids on their individual frequencies was modeled with a two-parameter exponential function. Next, FD of a finite sum of sinusoids was found to be a weighted average of their FDs, weighting factors being their Fourier amplitudes raised to a fractal degree. Exponent dependence on frequency was modeled with exponential, power and logarithmic functions. A set of 280 EEG signals and Weierstrass functions were analyzed. Cross-validation was done within EEG signals and between them and Weierstrass functions. Exponential dependence of fractal exponents on frequency was found to be the most accurate. In this work, signal FD was for the first time expressed as a fractal weighted average of FD values of its Fourier components, also allowing researchers to perform direct estimation of signal fractal dimension from its FFT spectrum.en
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/173022/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/41028/RS//
dc.rightsrestrictedAccessen
dc.sourceMedical and Biological Engineering and Computingen
dc.subjectFractal dimensionen
dc.subjectFFT spectraen
dc.subjectEEG signalsen
dc.subjectWeierstrass functionsen
dc.subjectHiguchis methoden
dc.titleModeling the relationship between Higuchis fractal dimension and Fourier spectra of physiological signalsen
dc.typearticleen
dcterms.abstractКалаузи, Aлександар; Вуцковиц, Aлександра; Бојић Тијана;
dc.citation.volume50
dc.citation.issue7
dc.citation.spage689
dc.citation.epage699
dc.identifier.wos000305683500005
dc.identifier.doi10.1007/s11517-012-0913-9
dc.citation.rankM21
dc.identifier.pmid22588703
dc.identifier.scopus2-s2.0-84864339224


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