S.M. Jesus sjesus@ualg.pt
UCEH - Universidade do Algarve, Faro, Portugal
M.B. Porter porter@mpl.ucsd.edu
Dep. of Applied Mathematics, New Jersey Institute of Technology, NJ, USA
Y. Stephan stephan@shom.fr
Centre Militaire Oceanographique - SHOM, Brest, France
E. Coelho oceanografia@hidrografico.pt
Instituto Hidrografico, Lisboa, Portugal
O.C. Rodriguez orodrig@ualg.pt
UCEH - Universidade do Algarve, Faro, Portugal
X. Demoulin demoulin@shom.fr
Centre Militaire Oceanographique - SHOM, Brest, France
Comments: download pdf file .
Ref.: Proc. MTS/IEEE Oceans'00, (ISBN 0-7803-6554-2),
p.865-868, Providence, (USA), October 2000.
Abstract : Source localization with a single sensor explores the time spread of the received signal as it travels from the emitter to the receiver. In shallow water, and for ranges larger than a few times the water depth, the received signal typically exhibits a large number of closely spaced arrivals. However, not all the arrivals are equally important for estimating the source position since a number of them convey redundant information. Theoreticaly, identifying the non-redundant arrivals is feasible in a isovelocity range independent waveguide. In previous work, the number of non-redundant arrivals and the dimension of the data sample signal subspace have been related in a range-independent case. This paper addresses the problem of determining the number of significant arrivals for localizing a sound source over a range-dependent environment off the West coast of Portugal during the INTIMATE'96 sea trial.
ACKNOWLEDGMENT: this work was partially supported by project INTIMATE from FCT (Portugal).