The estimation of the impulse response (IR) of a propagation channel may be of great interest for a large number of underwater applications: underwater communications, sonar detection and localization, marine mammal monitoring, etc. It quantifies the distortions of the transmitted signal in the underwater channel and enables geoacoustic inversion. The propagating signal is usually subject to additional and undesirable distortions due to the motion of the transmitter-channel-receiver configuration. This paper shows the effects of the motion while estimating the IR by matched filtering between the transmitted and the received signals. A methodology to compare IR estimation with and without motion is presented. Based on this comparison, a method for motion effect compensation is proposed in order to reduce motion-induced distortions. The proposed methodology is applied to real data sets collected in 2007 by the Service Hydrographique et Océanographique de la Marine in a shallow water environment, proving its interest for motion effect analysis. Motion compensated estimation of IRs is computed from sources transmitting broadband linear frequency modulations moving at up to in the shallow water environment of the Malta plateau, South of Sicilia.
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October 2009
October 01 2009
On the consideration of motion effects in the computation of impulse response for underwater acoustics inversion Available to Purchase
Nicolas F. Josso;
Nicolas F. Josso
a)
GIPSA-lab,
Grenoble Institute of Technology (GIT)
, 961 rue de la Houille Blanche, 38402 St Martin d’Hères, France
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Cornel Ioana;
Cornel Ioana
GIPSA-lab,
Grenoble Institute of Technology (GIT)
, 961 rue de la Houille Blanche, 38402 St Martin d’Hères, France
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Jérôme I. Mars;
Jérôme I. Mars
GIPSA-lab,
Grenoble Institute of Technology (GIT)
, 961 rue de la Houille Blanche, 38402 St Martin d’Hères, France
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Cédric Gervaise;
Cédric Gervaise
E3I2, EA3876, ENSIETA,
Université Européenne de Bretagne
, 2 rue Francois Verny, 29806 Brest Cedex, France
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Yann Stéphan
Yann Stéphan
SHOM
, CS52817, 13 rue du Chatellier 29228 Brest Cedex 2, France
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Nicolas F. Josso
a)
Cornel Ioana
Jérôme I. Mars
Cédric Gervaise
Yann Stéphan
GIPSA-lab,
Grenoble Institute of Technology (GIT)
, 961 rue de la Houille Blanche, 38402 St Martin d’Hères, Francea)
Author to whom correspondence should be addressed. Electronic mail: [email protected]
J. Acoust. Soc. Am. 126, 1739–1751 (2009)
Article history
Received:
January 14 2009
Accepted:
July 09 2009
Citation
Nicolas F. Josso, Cornel Ioana, Jérôme I. Mars, Cédric Gervaise, Yann Stéphan; On the consideration of motion effects in the computation of impulse response for underwater acoustics inversion. J. Acoust. Soc. Am. 1 October 2009; 126 (4): 1739–1751. https://doi.org/10.1121/1.3203308
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