Multitaper Wigner distribution with pre-determined doppler-lag bandwdith and sidelobe suppression
Author
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.
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.
Department/s
- Mathematical Statistics
- Statistical Signal Processing Group
Publishing year
2010
Language
English
Pages
1737-1741
Publication/Series
European Signal Processing Conference
Volume
2010
Links
Document type
Conference paper
Publisher
European Association for Signal Processing (EURASIP)
Topic
- 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
Research group
- Statistical Signal Processing
- Statistical Signal Processing Group
ISBN/ISSN/Other
- ISSN: 2219-5491