Warping based lag-Doppler filtering applied to motion effect compensation in acoustical multipath propagation.

• Main Authors: Josso, Nicolas, Ioana, Cornel, Mars, Jerome, Gervaise, Cedric
• Other Authors: GIPSA - Signal Images Physique (GIPSA-SIGMAPHY), Département Images et Signal (GIPSA-DIS), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Stendhal - Grenoble 3-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Développement des Technologies Nouvelles (DTN), École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne), MODE
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2009
• Subjects: [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing; [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing; Malta Plateau; Marine Mammal Monitoring
• Online Access: https://hal.science/hal-00386482

Résumé publié in The Journal of Acoustical Society of America, 125 (4) 2541. lien sur Acoustical Society of America http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JASMAN000125000004002541000004&idtype=cvips&gifs=yes International audience The estimation of an impulse response of a propagation channel is necessary for a large number of underwater applications: underwater communication, sonar detection and localization, marine mammal monitoring, etc. Basically it informs us about the distortions of transmitted signal in underwater channels and enables geoacoustic inversion. The propagated signal is usually subject to additional and undesirable distortions due to the motion of the transmitter-channel-receiver configuration. This paper points out the effects of the motion while estimating the IR by matching filtering between the transmitted and the received signals. A methodology to compare the IR estimation in motionless and motion contexts is presented. Based on this comparison, a warping-based lag-Doppler filtering method in the wideband ambiguity plane for motion effect compensation is proposed. It aims at reducing the distortions due to the motion phenomena and accurately estimating the IR of the channel. The proposed methodology is applied to real data sets issued from BASE'07 campaign (NURC, SHOM, and FWG, South of Sicilia, 2007). Motion compensated estimations of IRs are computed from sources transmitting broadband linear frequency modulations moving up to 12 knots in the shallow water environment of the Malta plateau.