The Frequency Response, Impulse Response, and Transfer Function of an Ocean Waveguide
Abstract
In this thesis, the ocean was modeled as a wave-guide with an ideal pressure - release surface, and an ideal rigid bottom. The ocean wave-guide 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 evaluation the three filter functions for several different test cases.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2004
- Accession Number
- ADA424621
Entities
People
- Walter B. Schulte Iii
Organizations
- Naval Postgraduate School