Broadband classification of spherical shells in a waveguide

PDF

Authors
  1. Fawcett, J.A.
  2. Sildam, J.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Abstract
In this paper, a multipath expansion method is used to model the scattering from a large set of spheres in a Pekeris waveguide. The spherical shells have different radii, relative thicknesses, and three different materials and are grouped into 6 classes: thick and thin-shelled and 3 different material compositions. The classification of the spheres from their echos is considered, First for the sphere in free space and then for the spheres in the waveguide. The cross-correlations of the observed echos with a library of echos is the basis of the classification. In the case of echos from a sphere in a waveguide, we consider the resulting classifications when using a library of free space echos and then echos modified with increasing accuracy to account for the waveguide propagation. The cross-correlation based classification approach has been chosen because of its common use in sonar target detection applications. It is hoped that the present results can be used as an intuitive baseline for the development of other target/waveguide classification methods.

Il y a un résumé en français ici.

Report Number
DRDC-ATLANTIC-TM-2008-217 — Technical Memorandum
Date of publication
01 Nov 2008
Number of Pages
46
DSTKIM No
CA032169
CANDIS No
531292
Format(s):
CD ROM

Permanent link

Document 1 of 1

Date modified: