Robust Source Localization and Environmental Characterization in the Ocean
Abstract
The proposed work involves studying, understanding, and exploiting the novel properties of the acoustic field autoproducts, quadrat"ic products of complex acoustic field amplitudes at two different frequencies (F1,F2) within a recorded signal~s bandwidth. When averaged through this bandwidth, the frequency-difference and frequency-sum autoproducts have been shown ~ via theory, simulation, and experiments in a simple multipath environment ~ to closely mimic (greater than 95% cross correlation) genuine acoustic fields at the difference (F2 ~ F1) and sum (F2 + F1) frequencies even when these frequencies lie outside the original signal~s bandwidth. However, this genuine-acoustic-field mimicry by the autoproducts is imperfect because of artifacts stemming from the quadratic product. The remote sensing limitations resulting from these imperfections are not yet understood, and are therefore a primary focus of this ef"fort.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 13, 2019
- Source ID
- N000141912459
Entities
People
- David J. Dowling
Organizations
- Board of Regents of the University of Michigan
- Office of Naval Research
- United States Navy