JAMES BARKER, PA-C
Physician Assistant in Alpharetta, GA

7991044, Aug 2, 2011

Nov 22, 2000

09/722168

Clifford Brown - Alpharetta GA, US
James E. Barker - Lawrenceville GA, US

Sunrise Telecom Incorporated - San Jose CA

H04B 3/46

375226

A device and methods for automatically diagnosing impairments in a digital quadrature amplitude modulated signal is disclosed. The impairments include phase noise, compression, coherent interference, and non-coherent interference. The device comprises a phase noise detector, a compression detector, and an interference detector. The phase noise detector detects phase noise by analyzing data points of an amplitude quadrature modulated constellation for orthogonal deviations from ideal points. The compression detector detects compression by analyzing the magnitudes of vectors from the constellation's origin to data points of the constellation. The interference detector detects coherent and non-coherent interference by detecting error signals in the data points and then analyzing the distribution of the error signals.

7010730, Mar 7, 2006

Nov 1, 2000

09/704888

Richard C. Jaworski - Alpharetta GA, US
Robert L. Richards - Roswell GA, US
James E. Barker - Lawrenceville GA, US
Herman B. Elliott - Duluth GA, US

Sunrise Telecom Incorporated - San Jose CA

G06F 11/00

714704

A system and method for testing a portion of a cable network provides a pattern generator, addresser, forward error corrector, and comparator. The system and method is particularly adapted to testing the upstream channel in a cable network. The pattern generator generates a test signal. The addresser addresses the signal to a known server and also instructs the known server to return the test signal to the test system. The forward error corrector corrects errors introduced in the test signal in transmission from the known server to the test system. The comparator then compares the returned test signal to the originally transmitted test signal to determine the performance of the back channel. Preferably, the comparator uses a bit error rate test to determine the performance of the back channel.

7509542, Mar 24, 2009

Nov 15, 2005

11/164247

Richard C. Jaworski - Alpharetta GA, US
Robert L. Richards - Roswell GA, US
James E. Barker - Lawrenceville GA, US
Herman B. Elliott - Duluth GA, US

Sunrise Telecom Incorporated - San Jose CA

G06F 11/00

714704

A system and method for testing a portion of a cable network provides a pattern generator, addresser, forward error corrector, and comparator. The system and method is particularly adapted to testing the upstream channel in a cable network. The pattern generator generates a test signal. The addresser addresses the signal to a known server and also instructs the known server to return the test signal to the test system. The forward error corrector corrects errors introduced in the test signal in transmission from the known server to the test system. The comparator then compares the returned test signal to the originally transmitted test signal to determine the performance of the back channel. Preferably, the comparator uses a bit error rate test to determine the performance of the back channel.

6052819, Apr 18, 2000

Apr 11, 1997

8/835966

James E Barker - Lawrenceville GA
Roy A. Bowcutt - Alpharetta GA
Scott E. Hrastar - Duluth GA
Todd A. Merrill - Alpharetta GA
David A. Sedacca - Atlanta GA

Scientific-Atlanta, Inc. - Norcross GA

H03M 1300

714776

A method for transporting digital data from a sender to a receiver in a system where the digital data is broken into data packets for transmission over radio frequency channels, each data packet including forward error-correcting code, the method comprising the steps of receiving the data packets at the receiver; reconstructing the data packets to the digital data, the forward error-correcting code for fixing corrupted data packets; and halting the data packet reconstructing step if a data packet is uncorrectable.

7721162, May 18, 2010

Feb 13, 2009

12/371505

Richard C. Jaworski - Alpharetta GA, US
Robert L. Richards - Roswell GA, US
James E. Barker - Lawrenceville GA, US
Herman B. Elliott - Johns Creek GA, US

Sunrise Telecom Incorporated - San Jose CA

G06F 11/00

714704

A system for testing a portion of a cable network provides a pattern generator, Addresser, forward error corrector, and comparator. The system is particularly adapted to testing the upstream channel in a cable network. The pattern generator generates a test signal. The addresser addresses the signal to a known server and also instructs the known server to return the test signal to the test system. The forward error corrector corrects errors introduced in the test signal in transmission from the known server to the test system. The comparator then compares the returned test signal to the originally transmitted test signal to determine the performance of the back channel. Preferably, the comparator uses a bit error rate test to determine the performance of the back channel.

2010014, Jun 10, 2010

Feb 10, 2010

12/703519

Richard C. Jaworski - Alpharetta GA, US
Robert L. Richards - Roswell GA, US
James E. Barker - Lawrenceville GA, US
Herman B. Elliott - Johns Creek GA, US

SUNRISE TELECOM INCORPORATED - San Jose CA

H03M 13/05

714752, 714E11032

A system for testing a portion of a cable network provides a pattern generator, addresser, forward error corrector, and comparator. The system is particularly adapted to testing the upstream channel in a cable network. The pattern generator generates a test signal. The addresser addresses the signal to a known server and also instructs the known server to return the test signal to the test system. The forward error corrector corrects errors introduced in the test signal in transmission from the known server to the test system. The comparator then compares the returned test signal to the originally transmitted test signal to determine the performance of the back channel. Preferably, the comparator uses a bit error rate test to determine the performance of the back channel.