Localization of acoustic transients in shallow water environments

Determination of an underwater target's position using passive acoustic sensors is of considerable use for the Navy, both for Anti-submarine warfare (ASW) and underwater surveillance. This thesis proposes and develops localization algorithms capable of passively determining the location of a transient source given some broad constraints. In particular, this thesis investigates the effect of the source signal uncertainty on localizer performance. The localization process consists of two parts. First, a time domain propagation modeling code determines the impulse response of the environment from all possible source location to a single hydrophone. This program predicts the signal as it would appear at the receiver from a grid of possible source locations. Second, source localization results from finding the maximum correlation between the positionally dependent, numerical modeled signals and the actual received signal. The position of the maximum cross correlations reveals an estimate of source position. Using model to model correlation, this techniques successfully localized acoustic sources in both Monterey Bay and Barents Sea scenarios.

Department dc:contributor.department

Department of Electrical and Computer Engineering

Grantor dc:publisher

Monterey, CA; Naval Postgraduate School

Year dc:date.issued

1992

Author dc:creator

• Nicholson, Charles Louis

Advisors dc:contributor.advisor

• Miller, James H.
• Chiu, Ching-Sang

Statement dc:rights

• This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.

Language dc:language.iso

en_US

Handle dc:identifier.uri

https://hdl.handle.net/10945/23946

OAI identifier oai:identifier

oai:calhoun.nps.edu:10945/23946