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Bandlimited signals, their properties and extrapolation capabilities
Mihálik, Ondrej ; Havránek, Zdeněk (oponent) ; Jura, Pavel (vedoucí práce)
The work is concerned with the band-limited signal extrapolation using truncated series of prolate spheroidal wave function. Our aim is to investigate the extent to which it is possible to extrapolate signal from its samples taken in a finite interval. It is often believed that this extrapolation method depends on computing definite integrals. We show an alternative approach by using the least squares method and we compare it with the methods of numerical integration. We also consider their performance in the presence of noise and the possibility of using these algorithms for real-time data processing. Finally all proposed algorithms are tested using real data from a microphone array, so that their performance can be compared.
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Application of Legendre basis for spectral analysis
Mesárošová, Michaela ; Jirgl, Miroslav (oponent) ; Mihálik, Ondrej (vedoucí práce)
The thesis focuses on the possibilities of using Legendre polynomials in order to obtain a spectrum of signals. It examines their properties in the time and frequency domain such as generating methods, root position, and orthogonality. Another goal was to implement the Legendre transform and to verify the quality of the obtained spectra and signal approximations in comparison with various methods. Finally, it deals with the choice of a suitable approximation order as well as the analytical possibilities of spectrum calculation.
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Hermiteova ortogonální báze a její využití pro získání spektra signálů
Mihálik, Ondrej ; Tůma, Martin (oponent) ; Jura, Pavel (vedoucí práce)
Práca je zameraná na využitie Hermiteovych funkcií pre účely aproximácie signálov. Cieľom práce je preskúmať ich vlastnosti v časovej a vo frekvenčnej oblasti, konkrétne ich ortogonalitu, Fourierovu transformáciu, korene a asymptotické správanie pre vysoké rády. Ďalším predmetom práce je otázka voľby mierky týchto funkcií s cieľom minimalizovať kvadratickú chybu aproximácie signálov. Porovnáva niekoľko metód od rôznych autorov. Na záver sú navrhnuté algoritmy overené pri aproximácii jednoduchých signálov, aby bolo tieto metódy možné porovnať.
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Application of Legendre basis for spectral analysis
Mesárošová, Michaela ; Jirgl, Miroslav (oponent) ; Mihálik, Ondrej (vedoucí práce)
The thesis focuses on the possibilities of using Legendre polynomials in order to obtain a spectrum of signals. It examines their properties in the time and frequency domain such as generating methods, root position, and orthogonality. Another goal was to implement the Legendre transform and to verify the quality of the obtained spectra and signal approximations in comparison with various methods. Finally, it deals with the choice of a suitable approximation order as well as the analytical possibilities of spectrum calculation.
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Bandlimited signals, their properties and extrapolation capabilities
Mihálik, Ondrej ; Havránek, Zdeněk (oponent) ; Jura, Pavel (vedoucí práce)
The work is concerned with the band-limited signal extrapolation using truncated series of prolate spheroidal wave function. Our aim is to investigate the extent to which it is possible to extrapolate signal from its samples taken in a finite interval. It is often believed that this extrapolation method depends on computing definite integrals. We show an alternative approach by using the least squares method and we compare it with the methods of numerical integration. We also consider their performance in the presence of noise and the possibility of using these algorithms for real-time data processing. Finally all proposed algorithms are tested using real data from a microphone array, so that their performance can be compared.
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|
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Hermiteova ortogonální báze a její využití pro získání spektra signálů
Mihálik, Ondrej ; Tůma, Martin (oponent) ; Jura, Pavel (vedoucí práce)
Práca je zameraná na využitie Hermiteovych funkcií pre účely aproximácie signálov. Cieľom práce je preskúmať ich vlastnosti v časovej a vo frekvenčnej oblasti, konkrétne ich ortogonalitu, Fourierovu transformáciu, korene a asymptotické správanie pre vysoké rády. Ďalším predmetom práce je otázka voľby mierky týchto funkcií s cieľom minimalizovať kvadratickú chybu aproximácie signálov. Porovnáva niekoľko metód od rôznych autorov. Na záver sú navrhnuté algoritmy overené pri aproximácii jednoduchých signálov, aby bolo tieto metódy možné porovnať.
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