By Topic

Acoustic imaging of underwater embedded objects: signal simulation for three-dimensional sonar instrumentation

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Palmese, M. ; Dept. of Biophys. & Electron. Eng., Univ. of Genoa ; Trucco, A.

This paper presents a method able to emulate the signals received by a sonar system exploring a submerged environment. The simulation of the response of an underwater scene insonified by a wideband pulse has been based on the reproduction of the interactions of the acoustic field with a buried object, with the seabed surface, and with the sediment volume. The signals gathered by the sonar array are emulated by modeling the surfaces of both the seabed and objects as a dense random grid of small discrete scatterers, by following Rayleigh's law, and by integrating the responses of the scatterers. The roughness effects are simulated by allowing random distances from the actual scatterer positions to their nominal positions on the surface. Sediment-volume inhomogeneities are modeled by a random distribution of the small asymmetrical scattering volumes, characterized by their three-dimensional (3-D) dimensions, densities, and sound velocities. In general, the simulator is very flexible in defining the object, the related scenario, and the major physical parameters involved. A voxel-based beamforming to generate the 3-D images starting with the simulated signals is also presented and briefly discussed. The 3-D images obtained appear very realistic and contain all the expected elements in the right relationships, including the typical speckle noise

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:55 ,  Issue: 4 )