Narrowband acoustic Doppler backscattering signal .I. Evolutionary Spectral Analysis
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/b5344df0-33d0-4b92-93e7-1b90789de8bf
- author
- Tao, Xiao-Jiao ; Claesson, Ingvar LU and Grbic, Nedelko LU
- organization
- publishing date
- 2002-11
- 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
- 2024-01-04 08:51:55
@article{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 = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, 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}}, doi = {{10.1109/TSP.2002.804097}}, volume = {{50}}, year = {{2002}}, }