Xiang Chen

US Patent:

6859466, Feb 22, 2005

Filed:

Nov 7, 2000

Appl. No.:

09/707362

Inventors:

Xiang Chen - Gaithersburg MD, US
Anthony Noerpel - Lovettsville VA, US
Enrique Laborde - Gaitherburg MD, US
David Roos - Boyds MD, US

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

H04J003/06

US Classification:

370509, 370350, 370315

Abstract:

An approach for is provided for adapting to a variety of link propagation conditions is disclosed. A source terminal generates a packet data burst that includes a header and an optional payload. The header is modulated using a default modulation scheme and is coded using a default coding scheme. A switch is configured to receive and to forward the packet data burst. A destination terminal is configured to demodulate the header using the default modulation scheme and the default coding scheme, and to examine the header to determine a particular coding scheme and a particular modulation scheme associated with the payload. The protocol can be applied to any radio communication system, particularly, to a satellite communication system with multiple satellite terminals.

US Patent:

20030129943, Jul 10, 2003

Filed:

Dec 18, 2001

Appl. No.:

10/023777

Inventors:

Yunsang Park - Rockville MD, US
Doug Wasson - Olney MD, US
Xiang Chen - Gaithersburg MD, US

International Classification:

H04B007/185

US Classification:

455/013400, 455/522000

Abstract:

A system and method is provided for adapting communications links in a satellite system. A quality parameter of a communications link is continuously monitored, wherein the link provides satellite-based packet data service to a user terminal. The method further provides for reducing a short-term sensitivity of the quality parameter such that a modified quality parameter results. An operating parameter of the link is adapted based on the modified quality parameter. By adapting the operating parameter, transmission throughput can be optimized according to the unique channel environment of each user without sacrificing reliability.

US Patent:

20040203393, Oct 14, 2004

Filed:

Mar 13, 2002

Appl. No.:

10/096600

Inventors:

Xiang Chen - Gaithersburg MD, US

International Classification:

H04B015/00

US Classification:

455/063100, 455/454000, 455/012100

Abstract:

A system and method for operating two components of a communication system within the same spectrum is provided. A first component is associated with a first set of channels and a second component is associated with a second set of channels. The center frequencies of the first set of channels are offset from the center frequencies of the second set of channels and rolloff filtering is employed in order to minimize interference between channels in the first component and overlapping channels in the second component.

US Patent:

20130257777, Oct 3, 2013

Filed:

May 28, 2013

Appl. No.:

13/903944

Inventors:

Xiang Chen - Pittsburgh PA, US
Kenneth Paul Hinckley - Redmond WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 3/0354

US Classification:

345173

Abstract:

A “Motion and Context Sharing Technique” uses a pen or stylus enhanced to incorporate multiple sensors, i.e., a “sensor pen,” and a power supply to enable various input techniques and gestures. Various combinations of pen stroke, pressure, motion, and other sensor pen inputs are used to enable various hybrid input techniques that incorporate simultaneous, concurrent, sequential, and/or interleaved, sensor pen inputs and touch inputs (i.e., finger, palm, hand, etc.) on displays or other touch sensitive surfaces. This enables a variety of motion-gesture inputs relating to the context of how the sensor pen is used or held, even when the pen is not in contact or within sensing range of the computing device digitizer. In other words, any particular touch inputs or combinations of touch inputs are correlated with any desired sensor pen inputs, with those correlated inputs then being used to initiate any desired action by the computing device.

US Patent:

20180281275, Oct 4, 2018

Filed:

Oct 31, 2016

Appl. No.:

15/772193

Inventors:

- Pittsburgh PA, US
Christopher Harrison - Pittsburgh PA, US
Xiang Chen - Mountain View CA, US

Assignee:

CARNEGIE MELLON UNIVERSITY - Pittsburgh PA

International Classification:

B29C 64/118
B33Y 10/00
B33Y 80/00

Abstract:

Embodiments disclosed herein describe a method of fabricating soft, flexible fibers using a 3D printer having an extrusion head. Embodiments of the method further include termination techniques to allow a series of fibers to be fabricated on the same object. Aspects of the certain embodiments offer a range of design parameters for controlling the properties of single strands and also of bundles of fibers. The method extends the capabilities of 3D printing without requiring any new hardware.

US Patent:

20170052700, Feb 23, 2017

Filed:

Aug 21, 2015

Appl. No.:

14/832983

Inventors:

- San Rafael CA, US
Xiang Anthony CHEN - Pittsburgh PA, US
George FITZMAURICE - Toronto, CA

International Classification:

G06F 3/0488
G06F 3/041
G06F 3/01

Abstract:

In one embodiment of the present invention, a gesture recognition application enables interactive entry via a touch pad. In operation, the gesture recognition application partitions the touch pad into multiple zones. Upon detecting a gesture via the touch pad, the gesture recognition application determines whether the gesture is zone-specific. If the gesture is zone-specific, then the gesture recognition application determines the zone based on the location of the gesture and then selects an input group based on the zone and the type of gesture. If the gesture is zone-agnostic, then the gesture recognition application selects an input group based on the type of gesture, irrespective of the location of the gesture. Advantageously, by providing zone-specific gesture recognition, the gesture recognition application increases the usability of touch pads with form factors that limit the type of gestures that can be efficiently performed via the touch pad.

US Patent:

20150153952, Jun 4, 2015

Filed:

Dec 4, 2014

Appl. No.:

14/560385

Inventors:

- San Rafael CA, US
Xiang Anthony CHEN - Pittsburgh PA, US
George FITZMAURICE - Toronto, CA

International Classification:

G06F 3/0488

Abstract:

In one embodiment of the present invention, at least a portion of a keyboard is displayed on a touch-screen display. A first action performed via the touch-screen display is detected. Based on the detected first action, a region of the at least a portion of the keyboard is displayed on the touch-screen display. A second action performed via the touch-screen display is detected. Based on the second action, a character may be selected or the full keyboard may be re-displayed. The first action and the second action may be performed anywhere on the touch display.