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Multitaper Wigner distribution with pre-determined doppler-lag bandwdith and sidelobe suppression

Författare:
Publiceringsår: 2010
Språk: Engelska
Sidor: 1737-1741
Publikation/Tidskrift/Serie: European Signal Processing Conference
Volym: 2010
Dokumenttyp: Konferensbidrag
Förlag: European Association for Signal Processing (EURASIP)

Sammanfattning

Multi taper spectrogram decomposition of the time-lag kernel

of a time-frequency distribution might result in computationally

efficient calculations if the number of multi tapers

to be considered in the spectrogram are small. In this paper,

penalty functions are designed and used in the computation

of multi tapers corresponding to the Wigner distribution

time-lag kernel. The resulting multi taper spectrogram will

approximately fulfill the concentration of the Wigner distribution

but will also suppress the usual Wigner distribution

cross-terms outside a predetermined doppler-lag bandwidth.

The level of the cross-term suppression is determined by a

parameter of the penalty function. The proposedmethod uses

a limited number of multi tapers which is determined by the

decided bandwidth. The time-frequency concentration of the

proposed method is compared to other well-known distributions.

The performance for white noise disturbances are also

evaluated.

Nyckelord

  • Probability Theory and Statistics

Övriga

18th European Signal Processing Conference (EUSIPCO-2010)
Published
  • Statistical Signal Processing-lup-obsolete
  • Statistical Signal Processing Group
  • ISSN: 2219-5491

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