Feng Chen

US Patent:

6763032, Jul 13, 2004

Filed:

Feb 10, 2000

Appl. No.:

09/501892

Inventors:

Theodore F. Rabenko - Duluth GA
James C. H. Thi - Irvine CA
Thomas J. Quigley - Lawrenceville GA
Lisa V. Denney - Suwanee GA
Jonathan S. Min - Buena Park CA
Christopher R. Jones - Newport Beach CA
Henry Samueli - San Juan Capistrano CA
Fang Lu - Irvine CA
Feng Chen - Irvine CA
Sean F. Nazareth - Anaheim Hills CA

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04B 7212

US Classification:

370442, 370488

Abstract:

A method for communicating information is disclosed wherein a time slot is allocated in a time division multiple access system for a transmission from a subscriber to a headend. Synchronization of a clock of the subscriber with respect to a clock of the headend is enhanced using a message transmitted from the headend to the subscriber which is indicative of an error in a subscriber transmission time with respect to the time slot. A feedback loop process is used to determine at least one of fractional symbol timing correction and carrier phase correction of a transmission from the subscriber to the headend. Filter coefficients are generated at the headend from a ranging signal transmitted from the subscriber to the headend and transmitting the filter coefficients from the headend to the subscriber, the filter coefficients being used by the subscriber to compensate for noise in a transmission from the subscriber to the headend.

US Patent:

7190704, Mar 13, 2007

Filed:

Feb 17, 2004

Appl. No.:

10/780362

Inventors:

Theodore F. Rabenko - Duluth GA, US
James C. H. Thi - Irvine CA, US
Thomas J. Quigley - Lawrenceville GA, US
Lisa V. Denney - Suwanee GA, US
Jonathan S. Min - Buena Park CA, US
Christopher R. Jones - Newport Beach CA, US
Henry Samueli - San Juan Capistrane CA, US
Fang Lu - Irvine CA, US
Feng Chen - Irvine CA, US
Sean F. Nazareth - Anaheim Hills CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04J 3/06

US Classification:

370508, 370350, 375229

Abstract:

A method for communicating information is disclosed wherein a time slot is allocated in a time division multiple access system for a transmission from a subscriber to a headend. Synchronization of a clock of the subscriber with respect to a clock of the headend is enhanced using a message transmitted from the headend to the subscriber which is indicative of an error in a subscriber transmission time with respect to the time slot. A feedback loop process is used to determine at least one of fractional symbol timing correction and carrier phase correction of a transmission from the subscriber to the headend. Filter coefficients are generated at the headend from a ranging signal transmitted from the subscriber to the headend and transmitting the filter coefficients from the headend to the subscriber, the filter coefficients being used by the subscriber to compensate for noise in a transmission from the subscriber to the headend.

US Patent:

20130116939, May 9, 2013

Filed:

Nov 3, 2011

Appl. No.:

13/288716

Inventors:

Jing D. Dai - White Plains NY, US
Feng Chen - Falls Church VA, US
Milind R. Naphade - Fishkill NY, US
Sambit Sahu - Hopewell Junction NY, US

Assignee:

INTERNATIONAL BUSINESS MACHINES CORPORATION - Armonk NY

International Classification:

G06F 19/00
G01F 1/74
G06F 17/18
G01R 21/00

US Classification:

702 45, 702188, 702 62, 702181

Abstract:

A computer program product includes a tangible storage medium readable by a processing circuit and on which instructions are stored for execution by the processing circuit for performing a method. The method includes, upon receiving utility consumption data of a group of elements, defining clusters of elements by like geography and like utility consumption, evaluating a significance of each cluster by comparing an average utility consumption within the cluster with utility consumption of elements neighboring the cluster and determining from a result of the evaluating which clusters exhibit significant differences in utility consumption from the neighboring elements and defining those clusters as regional outliers.