Larry W Freeman

US Patent:

7330399, Feb 12, 2008

Filed:

Sep 1, 2006

Appl. No.:

11/514872

Inventors:

Donald Lerro - Colchester CT, US
Larry Freeman - Potomac MD, US
John Green - Jewett City CT, US
David Ashworth - McLean VA, US

Assignee:

AC Capital Management, Inc. - Wilmington DE

International Classification:

G01S 15/32

US Classification:

367 99

Abstract:

A sonar system and method of use capable of discriminating a direct acoustic signal present at 60 dB or more above the acoustic echo signal.

US Patent:

7852709, Dec 14, 2010

Filed:

Dec 21, 2007

Appl. No.:

11/963077

Inventors:

Donald Lerro - Colchester CT, US
Larry Freeman - Potomac MD, US
John Green - Jewett City CT, US
David Ashworth - McLean VA, US

Assignee:

General Dynamice Information Technology - Fairfax VA

International Classification:

G01S 15/06

US Classification:

367100

Abstract:

A sonar system and method of use capable of discriminating a direct acoustic signal present at 60 dB or more above the acoustic echo signal.

US Patent:

20060007784, Jan 12, 2006

Filed:

Sep 29, 2004

Appl. No.:

10/953300

Inventors:

Donald Lerro - Colchester CT, US
Larry Freeman - Potomac MD, US
John Green - Jewett City CT, US
David Ashworth - McLean VA, US

International Classification:

G01S 15/32

US Classification:

367098000

Abstract:

A sonar system and method of use capable of discriminating a direct acoustic signal present at 60 dB or more above the acoustic echo signal.

US Patent:

20110002191, Jan 6, 2011

Filed:

Dec 7, 2007

Appl. No.:

12/000097

Inventors:

Martin Paul DeMaio - Ledyard CT, US
John T. Green - Lisbon CT, US
Larry Freeman - Potomac MD, US
Donald T. Lerro - Colchester CT, US
Atul R. Shah - Waterford CT, US

Assignee:

Alion Science & Technology - McLean VA

International Classification:

H04K 3/00
G01S 15/00

US Classification:

367 1, 367 87

Abstract:

An active sonar detection system may include a transmitter, which may project into the transmissive medium signals of any frequency, amplitude or phase using one or more transducers. A transmit beamformer to provide transmission directionality may also be included. Generated transmit waveforms may have different temporal and frequency spectra that are adapted for different purposes. Such purposes may include, individually or in combination: detection of stationary or moving objects and surfaces and the ability to describe, classify and/or localize them; the ability to interrogate the environment for its reverberation and propagation features and/or to discern fronts and eddies; the ability to mislead third parties and their apparatuses either by making the transmitted signal unobtrusive, or provide for stealth operations by making the signals appear to be radiating from a source other than the one from which the signals are actually radiating, or by giving the signals or an object, such as a submarine, the appearance of having a purpose other than that for which they are actually intended.