Paul Adrian Greene

US Patent:

6825714, Nov 30, 2004

Filed:

Jan 22, 2003

Appl. No.:

10/333695

Inventors:

Paul Louis Greene - La Crescenta CA
William Christopher Knaack - West Hills CA
Gregory Alan Gibbons - Thousand Oaks CA

Assignee:

Litton Systems, Inc. - Woodland Hills CA

International Classification:

H04R 144

US Classification:

329304, 367149, 250227

Abstract:

Apparatus for eliminating sign uncertainty in a coherent phase generated carrier demodulator in a multi-channel sensor system has a downconverter array arranged to separate the in-phase component I and the quadrature phase component of the sensor output for each channel. A coordinate transformer uses the in-phase component and quadrature phase component to calculate an arctangent for the phase angle for each channel. A digital signal processor adds 180Â to each arctangent calculation for which the tangent is a negative number.

US Patent:

6847588, Jan 25, 2005

Filed:

Mar 16, 2004

Appl. No.:

10/802655

Inventors:

George Wallace - Granada Hills CA, US
Paul Greene - Glendale CA, US

Assignee:

L-3 Communications Corporation - Sylmar CA

International Classification:

G01S 380

US Classification:

367129, 367119, 367124, 367130

Abstract:

A system and method for processing sonar information from an underwater hydrophone array, at frequencies having wavelengths less than two times a spacing between adjacent hydrophones. The method and system all for processing received underwater waveforms at high frequency limits beyond the mechanical limits of the array.

US Patent:

7339678, Mar 4, 2008

Filed:

Nov 9, 2005

Appl. No.:

11/270058

Inventors:

David B. Hall - La Crescenta CA, US
Paul L. Greene - La Crescenta CA, US

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

G01B 9/02
G01B 9/10

US Classification:

356478, 25022727

Abstract:

A method and system for providing fast interrogation of a signal received from a fiber optic sensor array using a low drive voltage, by modulating the array signal with a phase generated carrier optical signal having an odd harmonic modulation frequency, sending it to an interferometric system, and demodulating the array signal using a demodulation algorithm that is independent of the phase offset. A detector using direct detection method can be used to determine the signal's phase information. The odd harmonic modulation method allows the selection of a desirable odd harmonic PGC frequency with low drive voltage while providing similar performance of the usual PGC frequency that requires a higher drive voltage.

US Patent:

7403712, Jul 22, 2008

Filed:

Feb 22, 2005

Appl. No.:

11/062680

Inventors:

David B. Hall - La Crescenta CA, US
Paul L. Greene - La Crescenta CA, US

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H04J 14/00

US Classification:

398 75, 398 79, 398 82, 398 83, 398182, 398183, 398202, 398169, 398170, 398 33, 398177, 398 45, 398 48, 398 30, 398 31, 398 66, 398 67, 398 68, 398 69, 398 71, 398 72, 385 24, 385 37, 385 16, 385 17, 385 18

Abstract:

Embodiments of present system encompass: a plurality of laser sources that produce a plurality of respectively different optical wavelengths; a matrix switch having a plurality of inputs operatively coupled to the plurality of laser sources, each of the plurality of inputs receiving a respective optical wavelength; and the matrix switch having an output that produces a series of interleaved pulses of the different optical wavelengths.

US Patent:

7554885, Jun 30, 2009

Filed:

Feb 22, 2005

Appl. No.:

11/062649

Inventors:

David B. Hall - La Crescenta CA, US
Paul L. Greene - La Crescenta CA, US

Assignee:

Northrop Grumman Guidance and Electronics Company, Inc. - Woodland Hills CA

International Classification:

G01H 9/00
G01V 1/00

US Classification:

367149, 367 20, 367 76, 398152

Abstract:

At least two light beams with polarization diversity are generated that each carry a representation of the same information. Separate optic fibers carry each of the at least two beams through a region subject to vibration to a remote location where the information is recovered by an optical receiver based on the separate light beams. Using separate fibers to carry polarization diverse information minimizes polarization noise at the optical receiver due to vibration of the fibers.

US Patent:

7876644, Jan 25, 2011

Filed:

May 13, 2009

Appl. No.:

12/454115

Inventors:

David B. Hall - La Crescenta CA, US
Paul L. Greene - La Crescenta CA, US

Assignee:

Northrop Grumman Guidance and Electronics Company, Inc. - Woodland Hills CA

International Classification:

G01V 1/22
H04B 10/12

US Classification:

367 76, 367149, 398152

Abstract:

At least two light beams with polarization diversity are generated that each carry a representation of the same information. Separate optic fibers carry each of the at least two beams through a region subject to vibration to a remote location where the information is recovered by an optical receiver based on the separate light beams. Using separate fibers to carry polarization diverse information minimizes polarization noise at the optical receiver due to vibration of the fibers.

US Patent:

46369988, Jan 13, 1987

Filed:

Apr 18, 1984

Appl. No.:

6/601414

Inventors:

Paul L. Greene - La Crescenta CA
James Appling - Canoga Park CA

Assignee:

Allied Corporation - Morristown NJ

International Classification:

H04R 144

US Classification:

367154

Abstract:

An elongated retaining and electromagnetic shielding member for a towed underwater acoustic array which includes a plurality of interconnected hydrophones and circuit modules protected by a plastic foam cushioning sheath, covered with a tough, essentially acoustically transparent hose-like jacket and containing a plurality of aramid fiber ropes as strength members to carry the tensile loads on the array, wherein the retaining and shielding member consists of an an elongated tube-like electrically conductive fabric member interposed between the sheath and the exterior hose jacket which is longitudinally stitched to provide a plurality of spaced parallel tubes, some of which are of just sufficient diameter to contain said strength members and a larger central tube for containing the hydrophones, circuit modules and interconnecting wires. The strength members are terminated at a connector at each end of the array, and a spacer member is placed near each connector to spread the strength member ropes to the desired diameter. The spacer members and the adjacent ends of the retaining members are each cemented to the strength member ropes.