Frequency-Difference Source Localization and Blind Deconvolution in Shallow Ocean Environments

Abstract

The overall long-term goal for this project is to develop engineering tools that are useful to the Navy as it operates in uncertain, partially known, or unknown ocean environments. During the last year, this project has focused on (i) extending the synthetic time reversal (STR) blind deconvolution technique to dynamic multipath environments, and (ii) determining the utility of the frequency difference concept within matched field processing (MFP) as a means of robust source localization with sparse arrays and high frequency signals in imperfectly known environments. If successful, the STR work might make underwater acoustic communications more efficient and reliable since sound-channel calibration would not be necessary. Successful frequency difference MFP might extend the Navy's current sound source localization and tracking capabilities.