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On Time-Frequency Resolution of Signal Properties using Parametric Techniques
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
1993 (English)Report (Other academic)
Abstract [en]

The problem to track time-varying properties of a signal is studied. The somewhat contradictory notion of “time-varying spectrum” and how to estimate the “current” spectrum in an on-line fashion is discussed. The traditional concepts and relations between time- and frequency resolution are crucial for this problem. An adaptive estimation algorithm is used to estimate the parameters of a time-varying autoregressive model of the signal. It is shown how this algorithm can be equipped with a feature such that the time-frequency resolution trade-off favors quick detection of changes at higher frequencies and has slower adaptation at lower frequencies. This should be an attractive feature and similar to, for example, what wavelet transform techniques achieve for the same problem.

Place, publisher, year, edition, pages
Linköping: Linköping University , 1993. , 25 p.
Series
LiTH-ISY-R, ISSN 1400-3902 ; 1511
Keyword [en]
Spectrum estimation, Parametric methods, Time-frequency, Algorithms
Keyword [sv]
Elektronik Kretsar
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:liu:diva-55604ISRN: LiTH-ISY-R-1511OAI: oai:DiVA.org:liu-55604DiVA: diva2:316310
Available from: 2010-04-30 Created: 2010-04-30 Last updated: 2014-09-17Bibliographically approved

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Gustafsson, FredrikGunnarsson, SvanteLjung, Lennart

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CiteExportLink to record
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Citation style
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