Niejednoznaczności transformacji Wignera w analizie sygnałów niestacjonarnych

• Autorzy: Gonera M. , Opara T.

Warianty tytułu

EN

The Winger transformation of the analysis of nonstationary signals

• Języki publikacji: PL

Abstrakty

PL

Stosowanie transformacji Wignera w analizie sygnałów generuje nowe częstotliwości, które w analizowanym sygnale nie występują. Przedstawiono przykłady ilustrujące to niekorzystne zjawisko. Jest ono charakterystyczne dla większości powszechnie stosowanych transformacji i stanowi źródło niejednoznaczności w interpretacji wyników. Powstawanie pozornych częstotliwości nasila się dla sygnałów niestacjonarnych. Omówiono możliwości ich identyfikacji oraz ograniczenia ich wpływu.

EN

Using the Wigner transformation for the noise analysis cause new spurious frequencies, which are absent in the observed signal. Examples illustrating this disadvantage are presented. This disadvantage proves to be an ambiguity source in the interpretation of results and is typical for whole commonly used transformations. The spurious frequencies appearing escalate for the nonstationary signals. The abilities of their identification and reducing are discussed.

Słowa kluczowe

PL

analiza sygnałów niestacjonarnych; transformacja Page'a; transformacja Rihaczka; transformacja Wignera

EN

analysis of nonstationary signals; Page'a transformation; Rihaczka transformation; Wigner transformation

• Wydawca: Przemysłowy Instytut Elektroniki
• Czasopismo: Prace Przemysłowego Instytutu Elektroniki
• Rocznik: 2004
• Tom: nr 149
• Strony: 38--47
• Opis fizyczny: Bibliogr. 34 poz., rys.

Twórcy

autor

Gonera M.

• Przemysłowy Instytut Elektroniki

autor

Opara T.

• Politechnika Radomska

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