Time-warping in underwater acoustics: theory and applications
Abstract
The proposed work focuses on a signal processing technique known as time-warping. Time-warping is used to extract fixed mode number contributions from transient wavefield measurements made on a single hydrophone, i.e., without performing traditional mode filtering. The time-warping transform is environmentally dependent. Work to date has focused on application of a particular time-warping transform, the ideal shallow water waveguide transform, whose derivation assumes the ocean is homogeneous and overlies a flat rigid bottom. Recently, the proposer derived a time-warping transform that can be applied to a large class of underwater acoustic waveguides; the new general time-warping transform reduces to the ideal shallow water waveguide transform as a special case. In the proposed work we seek to expand on the theoretical development of the general time-warping algorithm, focusing on applications, and further explore its use on a variety of underwater acoustic data sets. The applications that we will focus on are sound speed structure recovery and source function recovery/underwater communication.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 05, 2021
- Source ID
- N000142112511
Entities
People
- Michael C Brown
Organizations
- Office of Naval Research
- United States Navy
- University of Miami