A Prony Algorithm for Shallow Water Waveguide Analysis
Abstract
This thesis examines the application of signal processing techniques to low frequency acoustic propagation in a shallow water wave guide from a normal mode context. By modelling the far field pressure field as a modal sum, propagating mode characteristics of wavenumber , initial phase, attenuation and amplitude may be estimated using a high resolution parameter modeling technique. The advantages of such an algorithm are the resolution of closely spaced modes in a range independent environment and the ability to analyze range dependent waveguides. This thesis presents the application of a Prony algorithm to the shallow water environment. The algorithm operates directly on the signal matrix. Synthetically generated, range-independent pressure fields are used to analyze the technique's performance and to observe its sensitivity to variations in model specifications. Noise is added to determine the threshold of acceptable performance. As a consequence of field data tests, further enhancements to the algorithm are suggested. Range dependent performance is evaluated on a coastal wedge example and geoacoustic parameter shift example. Keywords: Underwater acoustics waveguides; Acoustic channels; Acoustic attenuation. Theses.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1987
- Accession Number
- ADA208820
Entities
People
- Ferdinand J. Diemer
Organizations
- Woods Hole Oceanographic Institution