Ning Z Lu

US Patent:

8615190, Dec 24, 2013

Filed:

May 31, 2011

Appl. No.:

13/149277

Inventors:

Ning Hsing Lu - Clifton NJ, US

Assignee:

Exelis Inc. - McLean VA

International Classification:

H04K 3/00

US Classification:

455 1, 4554561, 455513, 4551153, 4554042, 455456, 342 14, 342 16, 342 17

Abstract:

According to an embodiment of the present invention jamming energy is allocated to a plurality of emitters based on a three-dimensional (3-D) emitter geolocation technique that determines the geolocation of radio frequency (RF) emitters based on energy or received signal strength (RSS) and/or time differences of arrival (TDOAs) of transmitted signals. The three-dimensional (3-D) emitter geolocations are used to rank emitters of interest according to distance and available radio frequency (RF) jamming energy is allocated to the emitters in rank order. The techniques may be employed with small unmanned air vehicles (UAV), and obtains efficient use of jamming energy when applied to radio frequency (RF) emitters of interest.

US Patent:

20120235864, Sep 20, 2012

Filed:

Mar 16, 2011

Appl. No.:

13/049443

Inventors:

Ning Hsing Lu - Clifton NJ, US

Assignee:

ITT MANUFACTURING ENTERPRISES, INC. - Wilmington DE

International Classification:

G01S 5/02

US Classification:

342451

Abstract:

According to an embodiment of the present invention, a three-dimensional (3-D) energy-based emitter geolocation technique determines the geolocation of a radio frequency (RF) emitter based on energy or received signal strength (RSS) of transmitted signals. The technique may be employed with small unmanned air vehicles (UAV), and obtains reliable geolocation estimates of radio frequency (RF) emitters of interest.

US Patent:

20120293371, Nov 22, 2012

Filed:

May 19, 2011

Appl. No.:

13/111379

Inventors:

Ning Hsing Lu - Clifton NJ, US

Assignee:

ITT MANUFACTURING ENTERPRISES, INC. - Wilmington DE

International Classification:

G01S 1/24

US Classification:

342387

Abstract:

According to an embodiment of the present invention, geolocations of multiple unknown radio frequency (RF) signal sources are determined using three-dimensional (3-D) geolocation techniques. The three-dimensional (3-D) geolocation techniques obtain reliable geolocation estimates of radio frequency (RF) emitters based on energy or received signal strength (RSS) of emitter transmitted signals and based on their time differences of arrival (TDOAs) at various sensor locations. The energy based geolocations and the time difference of arrival (TDOA) geolocations are combined to determine an overall set of geolocations for multiple unknown radio frequency (RF) signal sources. The geolocation information is used to track and monitor the locations of the multiple emitters.

US Patent:

20130027251, Jan 31, 2013

Filed:

Jul 27, 2011

Appl. No.:

13/191696

Inventors:

Ning Hsing Lu - Clifton NJ, US
Chi Chiu Chan - Wayne NJ, US
Qun Shi - Plainsboro NJ, US

Assignee:

ITT MANUFACTURING ENTERPRISES, INC. - Wilmington DE

International Classification:

G01S 5/02

US Classification:

342451

Abstract:

According to an embodiment of the present invention an emitter geolocation technique determines the geolocation of a radio frequency (RF) emitter using pair-wise line-of-bearing intersections that are derived from signal-to-noise ratios of transmitted signals received at a sensor. The technique may be employed with ground based vehicle or small unmanned air vehicles (UAV), and obtains reliable geolocation estimates of radio frequency (RF) emitters of interest.

US Patent:

20130070814, Mar 21, 2013

Filed:

Sep 15, 2011

Appl. No.:

13/233445

Inventors:

Ning Hsing Lu - Clifton NJ, US

Assignee:

ITT MANUFACTURING ENTERPRISES, INC. - Wilmington DE

International Classification:

H04B 1/38

US Classification:

375219

Abstract:

Enhanced reception in a communication system is achieved by applying a time domain generated time-reversed channel response to signals transmitted from a group of transmitter to a group of receivers. The time-reversed channel response is generated from a radio frequency channel response derived from signals previously received from the group of receivers, but reversed in the time domain. The time-reversed channel response is convolved with an information signal that when transmitted in a coordinated fashion from the group of transmitters, the signals arrive at each receiver in the group of distant receiving communication devices at approximately the same time where the signals coherently combine, thereby increasing signal power at the receivers. This permits detection at a greater range or with a lower bit error rate. In addition, the many-to-many configuration enables signal power from each transmitter to be focused temporarily and spatially on each receiver.

US Patent:

52587207, Nov 2, 1993

Filed:

Mar 2, 1984

Appl. No.:

6/585651

Inventors:

William J. Tanis - Wayne NJ
Ning H. Lu - Parsippany NJ
Alan N. Schenberg - Kinnelon NJ

Assignee:

ITT Corporation - New York NY

International Classification:

H03D 1300

US Classification:

328133

Abstract:

The digital sample and hold phase detector to compare the phase relationship between input pulses and a high frequency reference clock comprises a digital counter arrangement coupled to count the high frequency reference clock to produce a digital ramp signal and a digital sampling arrangement coupled to at least the input pulses and an output of the counter arrangement to enable the input pulses to sample the digital ramp signal and produce a digital phase difference signal.

US Patent:

52587240, Nov 2, 1993

Filed:

Dec 30, 1983

Appl. No.:

6/566947

Inventors:

William J. Tanis - Wayne NJ
Ning H. Lu - Parsippany NJ
Alan N. Schenberg - Kinnelon NJ

Assignee:

ITT Corporation - New York NY

International Classification:

H03L 722
H03B 1900

US Classification:

331 1A

Abstract:

The fractional division frequency synthesizer comprises a digital ramp generator producing a digital correction ramp controlled by a frequency control programmer; a divide by N divider coupled to an output of a voltage controlled oscillator with the divider being controlled by the program, where N is a selected one of an integer and a fraction one or greater; a digital phase detector coupled to a reference clock and the output of the divider to provide a digital phase error signal; a digital adder coupled to an output of the ramp generator and the phase detector to produce a ramp corrected digital phase error signal; and circuit arrangement coupled to an output of the adder and a control input of the controlled oscillator to convert the ramp corrected digital phase error signal to a ramp corrected analog phase error signal to control the controlled oscillator and thereby provide a controlled frequency signal at the output thereof.

US Patent:

45596069, Dec 17, 1985

Filed:

Jul 11, 1983

Appl. No.:

6/512280

Inventors:

Maurice L. Jezo - Cedar Grove NJ
Ning H. Lu - Parsippany NJ

Assignee:

International Telephone and Telegraph Corporation - New York NY

International Classification:

G06F 15336

US Classification:

364728

Abstract:

The arrangement comprises a plurality of correlation means coupled to the received signal with the received signal being clocked into each of the plurality of correlation means by a different one of a plurality of different phased clocks with the different phased clocks occurring at a predetermined different time uniformly spaced over a given time interval and integration means coupled to each of the plurality of correlation means to provide the indication of the time of arrival of the received signals. The plurality of correlation means includes a plurality of shift registers into which the received signals are shifted by a different one of the plurality of phased clocks, a reference signal register and a plurality of comparison means each coupled to each stage of a different one of the plurality of shift registers and each stage of the common reference signal shift register to compare the contents of the associated stages of the plurality of signal shift registers and the single common reference signal shift register and to produce an output signal indicative of the results of each of the comparisons.