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An Adaptive Optimal-Kernel Time-Frequency Representation

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dc.contributor.author Jones, Douglas L.
Baraniuk, Richard G.
dc.creator Jones, Douglas L.
Baraniuk, Richard G.
dc.date.accessioned 2007-10-31T00:48:22Z
dc.date.available 2007-10-31T00:48:22Z
dc.date.issued 1995-10-01
dc.date.submitted 2004-01-09
dc.identifier.uri http://hdl.handle.net/1911/19985
dc.description Journal Paper
dc.description.abstract Time-frequency representations with fixed windows or kernels figure prominently in many applications, but perform well only for limited classes of signals. Representations with signal- dependent kernels can overcome this limitation. However, while they often perform well, most existing schemes are block-oriented techniques unsuitable for on-line implementation or for tracking signal components with characteristics that change with time. The time-frequency representation developed here, based on a signal-dependent radially Gaussian kernel that adapts over time, overcomes these limitations. The method employs a short-time ambiguity function both for kernel optimization and as an intermediate step in computing constant-time slices of the representation. Careful algorithm design provides reasonably efficient computation and allows on-line implementation. Certain enhancements, such as cone-kernel constraints and approximate retention of marginals, are easily incorporated with little additional computation. While somewhat more expensive than fixed-kernel representations, this new technique often provides much better performance. Several examples illustrate its behavior on synthetic and real-world signals.
dc.subject Temporary
dc.subject.other Time Frequency and Spectral Analysis
dc.title An Adaptive Optimal-Kernel Time-Frequency Representation
dc.type Journal Paper
dc.citation.bibtexName article
dc.citation.journalTitle IEEE Transactions on Signal Processing
dc.date.modified 2006-07-24
dc.contributor.center Digital Signal Processing (http://dsp.rice.edu/)
dc.subject.keyword Temporary
dc.citation.volumeNumber 43
dc.citation.pageNumber 2361-2371
dc.citation.issueNumber 10
dc.identifier.citation D. L. Jones and R. G. Baraniuk, "An Adaptive Optimal-Kernel Time-Frequency Representation," IEEE Transactions on Signal Processing, vol. 43, no. 10, pp. 2361-2371, 1995.
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  • ECE Publications [1028 items]
    Publications by Rice University Electrical and Computer Engineering faculty and graduate students
  • DSP Publications [512 items]
    Publications by Rice Faculty and graduate students in digital signal processing.