title: Green's function estimation using secondary sources in a shallow water environment.
abstract: This work provides a new way to measure the Green's function between two points in an acoustic channel without emitting a pulse by any of the two points. The Green's function between A and B is obtained from a set of secondary sources in the guide by averaging either the correlation or the convolution of the signals received in A and B. A theoretical approach based on mode propagation in a monochromatic regime is presented. Results are then extended to the time domain. Estimation of the Green's function is performed numerically in a range-independent and a range-dependent environment. Application to discreet acoustic communications is discussed.
authors.affiliation: Laboratoire Ondes et Acoustique, ESPCI, Université Paris VII, 10 rue Vauquelin, 75005 Paris, France. philippe.roux@espci.fr
authors.forename: Philippe
authors.initials: P
authors.lastname: Roux
authors.forename: Mathias
authors.initials: M
authors.lastname: Fink