Publication:
The frequency response, impulse response, and transfer function of an ocean waveguide

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Authors
Schulte, Walter B., III
Subjects
Antisubmarine warfare
Ideal pressure - release surface, rigid bottom ocean waveguide model
Linear, time - invariant, space - variant filters
Complex frequency response
Impulse response, and transfer function of the ocean
Target localization
Advisors
Ziomek, Lawrence J.
Date of Issue
2004-06
Date
June 2004
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
In this thesis, the ocean was modeled as a waveguide with an ideal pressure - release surface, and an ideal rigid bottom. The ocean waveguide was then treated as a linear, time - invariant, space - variant (TISV) filter or communication channel. The filter is time - invariant because no motion was modeled and because the properties of the ocean were assumed to be constant. The filter is space - variant because of the presence of the two boundaries, that is, the ocean surface and ocean bottom. This thesis investigates the ocean as a linear TISV filter by evaluating 1) the complex frequency response, 2) the impulse response, and 3) the transfer function of the ocean with respect to depth. It is shown that the TISV impulse response of the ocean contains information that can be used to help localize a target in range and whether the target is above or below the receiver. Computer simulation results were obtained by evaluating the three filter functions for several different test cases.
Type
Thesis
Description
Series/Report No
Department
Undersea Warfare Academic Committee
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
xiv, 49 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
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.
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