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The scaled reassigned spectrogram adapted for detection and localisation of transient signals

Reinhold, Isabella LU ; Starkhammar, Josefin LU and Sandsten, Maria LU (2017) 25th European Signal Processing Conference, EUSIPCO 2017 p.937-941
Abstract
The reassigned spectrogram can be used to improve the readability of a time-frequency representation of a non-stationary and multi-component signal. However for transient signals the reassignment needs to be adapted in order to achieve good localisation of the signal components. One approach is to scale the reassignment. This paper shows that by adapting the shape of the time window used with the spectrogram and by scaling the reassignment, perfect localisation can be achieved for a transient signal component. It is also shown that without matching the shape of the window, perfect localisation is not achieved. This is used to both identify the time-frequency centres of components in a multi-component signal, and to detect the shapes of the... (More)
The reassigned spectrogram can be used to improve the readability of a time-frequency representation of a non-stationary and multi-component signal. However for transient signals the reassignment needs to be adapted in order to achieve good localisation of the signal components. One approach is to scale the reassignment. This paper shows that by adapting the shape of the time window used with the spectrogram and by scaling the reassignment, perfect localisation can be achieved for a transient signal component. It is also shown that without matching the shape of the window, perfect localisation is not achieved. This is used to both identify the time-frequency centres of components in a multi-component signal, and to detect the shapes of the signal components. The scaled reassigned spectrogram with the matching shape window is shown to be able to resolve close components and works well for multi-components signals with noise. An echolocation signal from a beluga whale (Delphinapterus leucas) provides an example of how the method performs on a measured signal. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Hermite functions, non-stationary signals, time-frequency analysis, reassignment, signal resolution
host publication
European Signal Processing Conference
pages
5 pages
publisher
European Association for Signal Processing (EURASIP)
conference name
25th European Signal Processing Conference, EUSIPCO 2017
conference location
Kos, Greece
conference dates
2017-08-28 - 2017-09-02
external identifiers
  • scopus:85041393597
ISBN
978-0-9928626-7-1
DOI
10.23919/EUSIPCO.2017.8081339
language
English
LU publication?
yes
id
16f5ca49-9347-4fdf-a44c-8b9c39f4582a
date added to LUP
2017-11-02 14:18:33
date last changed
2019-01-20 05:51:07
@inproceedings{16f5ca49-9347-4fdf-a44c-8b9c39f4582a,
  abstract     = {The reassigned spectrogram can be used to improve the readability of a time-frequency representation of a non-stationary and multi-component signal. However for transient signals the reassignment needs to be adapted in order to achieve good localisation of the signal components. One approach is to scale the reassignment. This paper shows that by adapting the shape of the time window used with the spectrogram and by scaling the reassignment, perfect localisation can be achieved for a transient signal component. It is also shown that without matching the shape of the window, perfect localisation is not achieved. This is used to both identify the time-frequency centres of components in a multi-component signal, and to detect the shapes of the signal components. The scaled reassigned spectrogram with the matching shape window is shown to be able to resolve close components and works well for multi-components signals with noise. An echolocation signal from a beluga whale (Delphinapterus leucas) provides an example of how the method performs on a measured signal.},
  author       = {Reinhold, Isabella and Starkhammar, Josefin and Sandsten, Maria},
  isbn         = {978-0-9928626-7-1},
  keyword      = {Hermite functions, non-stationary signals,time-frequency analysis,reassignment,signal resolution},
  language     = {eng},
  location     = {Kos, Greece},
  pages        = {937--941},
  publisher    = {European Association for Signal Processing (EURASIP)},
  title        = {The scaled reassigned spectrogram adapted for detection and localisation of transient signals},
  url          = {http://dx.doi.org/10.23919/EUSIPCO.2017.8081339},
  year         = {2017},
}