Bruce E Bates

US Patent:

57814600, Jul 14, 1998

Filed:

Jun 28, 1996

Appl. No.:

8/682896

Inventors:

Chung T. Nguyen - Bristol RI
Francis J. O'Brien - Newport RI
Sherry E. Hammel - Little Compton RI
Bruce J. Bates - Portsmouth RI
Steven C. Nardone - Narragansett RI

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G06F 1710
H04B 102

US Classification:

364724011

Abstract:

A chaotic signal processing system receives an input signal provided by a nsor in a chaotic environment and performs a processing operation in connection therewith to provide an output useful in identifying one of a plurality of chaotic processes in the chaotic environment. The chaotic signal processing system comprises an input section, a processing section and a control section. The input section is responsive to input data selection information for providing a digital data stream selectively representative of the input signal provided by the sensor or a synthetic input representative of a selected chaotic process. The processing section includes a plurality of processing modules each for receiving the digital data stream from the input means and for generating therefrom an output useful in identifying one of a plurality of chaotic processes. The processing section is responsive to processing selection information to select one of the plurality of processing modules to provide the output. The control module generates the input data selection information and the processing selection information in response to inputs provided by an operator.

US Patent:

53574842, Oct 18, 1994

Filed:

Oct 22, 1993

Appl. No.:

8/147237

Inventors:

Bruce J. Bates - Portsmouth RI
Susan M. Bates - Portsmouth RI

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01S 380

US Classification:

367118

Abstract:

An apparatus and method for determining the range and depth to an acoustic ource from a sampling site in a medium. A linear array of pressure transducers monitors the acoustic field produced by the acoustic source. A measurement processor utilizes the measured acoustic field to produce an initial field condition for each member of the array. An environmental model includes environmental data in the form of acoustically pertinent variables that define acoustic energy transfer characteristics through the medium at different ranges and depths. A backpropagation processor utilizes the initial field condition and the acoustically pertinent variables to produce, for each incremental range and depth, an amplitude function. An index processor normalizes the amplitude functions for each incremental range and depth, and an index extreme value processor selects the amplitude function with the maximum amplitude. The range and depth of that extreme value amplitude function is used to determine the range and depth for the acoustic source.