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

Författare

Summary, in English

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.

Avdelning/ar

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)

Ämne

  • Probability Theory and Statistics

Conference name

18th European Signal Processing Conference (EUSIPCO-2010)

Conference date

2010-08-23 - 2010-08-27

Conference place

Aalborg, Denmark

Status

Published

Forskningsgrupp

  • Statistical Signal Processing
  • Statistical Signal Processing Group

ISBN/ISSN/Övrigt

  • ISSN: 2219-5491