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Narrowband acoustic Doppler backscattering signal .I. Evolutionary Spectral Analysis

Tao, Xiao-Jiao; Claesson, Ingvar LU and Grbic, Nedelko LU (2002) In IEEE Transactions on Signal Processing 50(11). p.2644-2655
Abstract
This paper examines the statistical properties of the narrowband Doppler volume backscattering process and analyzes its evolutionary spectrum. After clarifying the mechanism of both the finite duration Doppler effect and the continuously space-shifted integration process, the first two order time-varying statistics under a more general assumption, i.e., von Mises distribution, of random phase are derived. The generalization permits nonuniform phase tendency, which occurs in layered medium scattering. Based on the locally stationary process model, the evolutionary spectrum of the signal is derived. It is shown that the variation of the backscattering strength enters the spectrum as an amplitude modulation, whereas the variation of the... (More)
This paper examines the statistical properties of the narrowband Doppler volume backscattering process and analyzes its evolutionary spectrum. After clarifying the mechanism of both the finite duration Doppler effect and the continuously space-shifted integration process, the first two order time-varying statistics under a more general assumption, i.e., von Mises distribution, of random phase are derived. The generalization permits nonuniform phase tendency, which occurs in layered medium scattering. Based on the locally stationary process model, the evolutionary spectrum of the signal is derived. It is shown that the variation of the backscattering strength enters the spectrum as an amplitude modulation, whereas the variation of the random phase distribution acts as both the amplitude modulation and the frequency modulation. Finally, the observability of the average flow speed using the spectral centroid estimate is discussed. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Transactions on Signal Processing
volume
50
issue
11
pages
12 pages
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • Scopus:0036842782
ISSN
1053-587X
DOI
10.1109/TSP.2002.804097
language
English
LU publication?
yes
id
b5344df0-33d0-4b92-93e7-1b90789de8bf
date added to LUP
2016-06-23 13:44:06
date last changed
2016-10-13 05:10:42
@misc{b5344df0-33d0-4b92-93e7-1b90789de8bf,
  abstract     = {This paper examines the statistical properties of the narrowband Doppler volume backscattering process and analyzes its evolutionary spectrum. After clarifying the mechanism of both the finite duration Doppler effect and the continuously space-shifted integration process, the first two order time-varying statistics under a more general assumption, i.e., von Mises distribution, of random phase are derived. The generalization permits nonuniform phase tendency, which occurs in layered medium scattering. Based on the locally stationary process model, the evolutionary spectrum of the signal is derived. It is shown that the variation of the backscattering strength enters the spectrum as an amplitude modulation, whereas the variation of the random phase distribution acts as both the amplitude modulation and the frequency modulation. Finally, the observability of the average flow speed using the spectral centroid estimate is discussed.},
  author       = {Tao, Xiao-Jiao and Claesson, Ingvar and Grbic, Nedelko},
  issn         = {1053-587X},
  language     = {eng},
  number       = {11},
  pages        = {2644--2655},
  publisher    = {ARRAY(0x9aaeaa0)},
  series       = {IEEE Transactions on Signal Processing},
  title        = {Narrowband acoustic Doppler backscattering signal .I.  Evolutionary Spectral Analysis},
  url          = {http://dx.doi.org/10.1109/TSP.2002.804097},
  volume       = {50},
  year         = {2002},
}