Steve C Hsu, 68931 Callahan Ln, Placentia, CA 92870

6529162, Mar 4, 2003

May 17, 2001

09/859927

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

H01Q 322

342375, 342372, 342373

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.

6985620, Jan 10, 2006

Mar 7, 2001

09/800550

Harpreet Singh Sawhney - West Windsor NJ, US
Rakesh Kumar - Monmouth Junction NJ, US
Steve Hsu - Cranbury NJ, US
Supun Samarasekera - Princeton NJ, US

Sarnoff Corporation - Princeton NJ

G06K 9/00

382154, 382103, 382190, 382294, 348 42, 348169, 345419

The present invention is embodied in a video flashlight method. This method creates virtual images of a scene using a dynamically updated three-dimensional model of the scene and at least one video sequence of images. An estimate of the camera pose is generated by comparing a present image to the three-dimensional model. Next, relevant features of the model are selected based on the estimated pose. The relevant features are then virtually projected onto the estimated pose and matched to features of the image. Matching errors are measured between the relevant features of the virtual projection and the features of the image. The estimated pose is then updated to reduce these matching errors. The model is also refined with updated information from the image. Meanwhile, a viewpoint for a virtual image is selected. The virtual image is then created by projecting the dynamically updated three-dimensional model onto the selected virtual viewpoint.

5555106, Sep 10, 1996

Apr 4, 1994

8/223094

Steve H. Hsu - Torrance CA

H04N 146

358512

A method and apparatus for digitizing color images on photographic and other media insures accurate registration between color planes and provides a digitization capability substantially equivalent to the dynamic range of photographic film.

5495202, Feb 27, 1996

Jun 30, 1993

8/089066

Steve I. Hsu - Rancho Palos Verdes CA

Hughes Aircraft Company - Los Angeles CA

H03B 1900
H03L 700
G06G 728

327113

A digital waveform synthesizer, using a direct digital synthesizer and a digital frequency divider. The direct digital synthesizer provides a digitally synthesized input frequency signal. An upconverter and frequency divider circuit upconverts and divides the synthesized input frequency signal to provide an divided synthesized frequency signal. An output upconverter circuit is coupled to the upconverter and divider circuit for providing an upconverted output frequency signal. A reference frequency generator is coupled to the direct digital synthesizer, to the upconverter and divider circuit, and to the output upconverter, for providing clock and frequency reference signals thereto. The waveform generator is coupled to the direct digital synthesizer for commanding a desired waveform. The frequency divider is used to improve the inherently poor spurious signal performance of the direct digital synthesizer.

5625324, Apr 29, 1997

Jun 7, 1995

8/482334

Steve I. Hsu - Rancho Palos Verdes CA
Stephen D. Taylor - Agoura CA

Hughes Electronics - Los Angeles CA

H03L 707

331 2

The frequencies of N oscillators are summed to provide a signal generator output signal. Because the phase noise power spectral densities of the oscillators add as power, the frequency summed output exhibits a noise degradation over a single oscillator of only 10 log(N). The signal generator is implemented to assure independence of the oscillator noise contributions, with phase locking the oscillators to a common frequency for ease of spurious signal control.

5673051, Sep 30, 1997

Dec 21, 1995

8/576325

Howard S. Nussbaum - Los Angeles CA
William P. Posey - Palos Verdes Estates CA
Steve I. Hsu - Rancho Palos Verdes CA
Stephen D. Taylor - Agoura CA

Hughes Electronics - Los Angeles CA

G01S 1300

342202

Discrete phase modulation for modulating the transmit and receive radar signal waveforms in order to control distortion. The signal is modulated by discrete phases which change from pulse-to-pulse. A digital frequency division circuit accurately generates the modulation signals, and allows the discrete phases to be generated with precise accuracy. The discrete phase changes can be a quadratic phase progression for target Doppler and range detection.

5225840, Jul 6, 1993

Jun 8, 1992

7/894898

Steve Hsu - Rancho Palos Verdes CA

Hughes Aircraft Company - Los Angeles CA

G01S 7282
H03L 700

342175

An efficient wideband low noise microwave signal generator for active radars. Separate transmit drive (TD) and receiver local oscillator (LO) signals are generated by use of a single programmable reference generator and two frequency synthesized signals separated in frequency by an offset precisely equal to the transmit drive offset. The frequency synthesized signals are respectively summed and subtracted in frequency with the reference generator signal to obtain signals which may be selected as the TD and LO signals.