Trung N Nguyen

Author:

Trung Hieu Nguyen

ISBN #:

0533044316

Author:

Trung Van Nguyen

ISBN #:

0080453945

Address:

2731 Gillespie Ct, Grand Prairie, TX 75052

VIN:

JTHBK262672035856

Make:

LEXUS

Model:

IS 250

Year:

2007

US Patent:

6529162, Mar 4, 2003

Filed:

May 17, 2001

Appl. No.:

09/859927

Inventors:

Irwin L. Newberg - Pacific Palisades CA 90272
Oleg Brovko - Los Angeles CA 90066
Steve I. Hsu - Rancho Palos Verdes CA 90275
Robert A. Kosmala - Playa Del Rey CA 90193
Trung T. Nguyen - Huntington Beach CA 92646
Ricardo Rico, Jr. - Downey CA 90241

International Classification:

H01Q 322

US Classification:

342375, 342372, 342373

Abstract:

A system and technique for phased array antenna beam steering for transmitting and receiving without sending the waveform through an actual (physical) time delay when a time varying frequency is used as the waveform. The inventive system is adapted for use with an antenna having an array of radiating elements and includes a plurality of signal sources. Each source is adapted to provide a signal having a predetermined frequency offset signal for an associated radiating element or set of radiating elements. For transmit a plurality of first mixers is provided. Each of the first mixers is coupled to receive an excitation signal as a first input and the output from a respective one of the sources as a second input. The output of each mixer is coupled to a respective subset of the antenna radiating elements. In effect, each of the sources provides a virtual time delay.

US Patent:

6664920, Dec 16, 2003

Filed:

Nov 18, 1993

Appl. No.:

08/154051

Inventors:

Charles J. Mott - El Segundo CA
Trung T. Nguyen - Huntington Beach CA

Assignee:

Raytheon Company - Lexington MA

International Classification:

G01S 1338

US Classification:

342129, 342 70, 342196

Abstract:

A cancellation technique embodied in a system and a radar signal processing method that is employed to detect near-range targets. The present invention uses a frequency-modulation continuous-wave (FMCW) or stepped frequency waveform and is capable of detecting near-range targets that would normally be obscured by transmitter leakage and internal reflections. This cancellation technique works by transmitting one or more reference ramp signals and then subtracting the coherent average of the transmitted reference ramp signals from a group of succeeding transmitted and received ramp return -signals. The resulting group of FM ramp return signals is noncoherently integrated to achieve more stable target detection statistics. More particularly, the present technique implements the following processing steps. Generating a predetermined number of reference ramp signals.

US Patent:

6888490, May 3, 2005

Filed:

Jul 20, 2004

Appl. No.:

10/894792

Inventors:

Oleg Brovko - Los Angeles CA, US
Eric Wayne Day - Lomita CA, US
Trung T. Nguyen - Huntington Beach CA, US
Jing Zhao - Moreno Valley CA, US
Mark S. Klemens - Los Angeles CA, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

G01S013/90

US Classification:

342 25A, 342 25 R, 342 25 F

Abstract:

A synthetic aperture radar (SAR) image of a wide coverage area is acquired during a frame containing a first plurality of ambiguities induced in the SAR image from radar scatterers within the area. The area is illuminated with radar pulses and a segmented receive antenna oriented towards the area. The segmented receive antenna has a second plurality of sub-apertures, where the second plurality of sub-apertures is larger than the first plurality of ambiguities. Each sub-aperture has its own receiver. The digital stream from each receiver is stored in a computer for the duration of the frame to obtain frame data. A SAR image is extracted from the frame data. The first plurality of ambiguities are identified from analysis of the frame data, and a correction is computed to account for the first plurality of ambiguities contained within the synthetic aperture image. The correction is applied to reduce distortions caused by the ambiguities in the SAR image.

US Patent:

8424126, Apr 23, 2013

Filed:

Mar 30, 2011

Appl. No.:

13/065802

Inventors:

Trung T Nguyen - Plano TX, US

International Classification:

E03D 1/14

US Classification:

4362, 4324, 4411, 4413

Abstract:

A controllable toilet flushing apparatus comprises an activating handle mechanism configured in a hollow housing assembly positioned under a toilet tank to be placed directly or indirectly over a toilet bowl; a hollow housing assembly where the activating handle mechanism and an outlet funnel are configured from within is manufactured to work with a mating sealed toilet tank or an open-top toilet tank; the activating handle mechanism comprises a horizontal shaft loaded with at least one torsion spring, a lift arm positioned under the outlet valve opening is attached to the horizontal shaft at the pivotal end and the other end can be attached to the outlet valve cap, at least one activating handle attached to the horizontal shaft end thereof to activate a flush by forcing the outlet valve cap lifted upwardly which allows water from the toilet tank to be discharged into the toilet bowl.

US Patent:

56231954, Apr 22, 1997

Filed:

Jun 22, 1994

Appl. No.:

8/263971

Inventors:

Norma K. Bullock - Rockwall TX
Douglas G. Fent - Mesquite TX
Trung V. Nguyen - Dallas TX

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H01M 1046

US Classification:

320 22

Abstract:

A battery charging system controls and modifies the output voltage of the charging rectifier in response to differing temperature ranges of the battery. At a low range of temperatures starting at a low temperature (e. g. within a range of 0 to 25. degree. C. to about 53. degree. C. ) the rectifier voltage decreases as the temperature increases to prevent charging current from rising as the battery temperature increases. This change is performed in accord with a linear graphical slope relating the change of charging voltage to temperature. A suitable charging voltage decrease rate may be 3 mV/. degree. C. /cell with a range of 1. 5 mV/. degree. C. /cell to 5 mV/. degree. C. /cell being acceptable. Reduction of the charging voltage within this range reduces the aging effect of high temperature operation of the battery. The charging voltage applied to the battery is held at a constant value over a subsequent range of temperatures (e. g. 53. degree. C. to 75. degree. C.

US Patent:

57422524, Apr 21, 1998

Filed:

Aug 26, 1996

Appl. No.:

8/703310

Inventors:

Trung T. Nguyen - Huntington Beach CA
Loan Taree Bui - Rosemead CA

Assignee:

Raytheon Company - Lexington MA

International Classification:

G01S 502

US Classification:

342156

Abstract:

An apparatus for reducing the computational requirements for resolving ambiguity in interferometer measurements where the interferometer elements are arranged arbitrarily. Each of a plurality of interferometer elements each measures the phase of the incoming electromagnetic signal. The interferometer elements are each separated by lengths defined as baselines, which are sorted and processed in ascending order. Following initialization, for each baseline (92, 108), the phase measurements of the next baseline (92, 108) to be processed are estimated. If the measured phases (94-100, 110-118) of the next baseline (92, 108) falls within a predetermined range (104, 106) of the estimated phases, the phase is retained for estimating the phases of the next baseline. After a sufficient number of baselines have been processed, the angle of the incoming electromagnetic signal may be determined in accordance with the retained phases.

US Patent:

51913372, Mar 2, 1993

Filed:

Feb 25, 1992

Appl. No.:

7/841133

Inventors:

Oleg Brovko - Los Angeles CA
Trung T. Nguyen - Huntington Beach CA

Assignee:

Hughes Aircraft Company - Los Angeles CA

International Classification:

G01S 1353
G01S 13532

US Classification:

342200

Abstract:

A maximum likelihood estimator and range-only-initialization target detection method employed to detect and resolve targets in a multislope linear frequency modulated waveform radar. The method resolves a large number of target returns without a large amount of signal processing and without creating a significant number of false alarms, or ghosts. The method simultaneously estimates range and doppler for each target. The method rejects undesired long-range targets that fold into target regions, and processes target regions of interest around a nearest target to reduce signal processing throughput requirements. Using a K out of N detection rule, the method detects targets that compete with mainlobe rain clutter, mainlobe ground clutter, and receiver leakage. The method simultaneously estimates target parameters and optimally resolves any number of targets. The method is limited only by the number of frequency modulation ranging slopes, the slope values, and the doppler filter resolution set by the radar waveform design.

US Patent:

57013993, Dec 23, 1997

Filed:

Dec 20, 1996

Appl. No.:

8/771311

Inventors:

S. Daniel Lee - San Gabriel CA
Trung D. Nguyen - Tomball TX
Mary P. Czerwinski - The Woodlands TX

Assignee:

Inference Corporation - El Segundo CA

International Classification:

G06F 1518

US Classification:

395 51

Abstract:

A system in which a case-based search engine is integrated into a "help" database. The help database may be organized in a predetermined manner and converted by a computer program into a case-based format. An operator of a "help" program (e. g. , a user who desires on-line help) may request a case-based search of the case-base using case-based methods. The case-based search provides a set of likely cases, i. e. , help topics, from among which the operator may select the next help topic to view. The system may also present matched objects in response to the query, may respond to iterative refinement of the query (in similar manner to known iterative case-based methods) and may order matched objects by quality of match.