By Topic

On the use of time-frequency methods in a passive acoustic monitoring system

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

3 Author(s)
Gervaise, C. ; DTN Lab., ENSIETA, Brest, France ; Stephan, Y. ; Simard, Y.

A modern method for discrete underwater channel characterization is the passive tomography concept which takes advantage of the generated signals by the natural sources (opportunity sources). The main difficulty which appears in this field is due to the lack of any information about the received signals. In this paper, we present a method for underwater channel characterization, supposing that the received signal is a sum of shifted chirps, having the same chirp rate and start frequency. Hence, using the fractional Fourier transform, it is possible to express the received signal as a sum of sinusoids whose frequencies are directly related to the times of arrival. In order to distinguish the closed arrivals, we apply a high resolution spectral estimation method, providing also the time of arrivals.

Published in:

Acoustics Speech and Signal Processing (ICASSP), 2010 IEEE International Conference on

Date of Conference:

14-19 March 2010