Gang Ziqian Z Xu

US Patent:

7154941, Dec 26, 2006

Filed:

Jun 28, 2002

Appl. No.:

10/186319

Inventors:

Anand Kannan - Irving TX, US
Gang Xu - Denton TX, US
Sridhar Rajagopal - Houston TX, US

Assignee:

Nokia Corporation - Espoo

International Classification:

H04B 1/38

US Classification:

375222

Abstract:

Apparatus, and an associated method, for operating upon data communicated during operation of a communication system. A vector processor is provided for a modem (MOdulator/DEModulator), and the modem functionality is effectuated through the execution of algorithms at the vector processor. The algorithms are vectorized and stored at a memory device. The algorithms are accessed and provided to parallel processing devices of the vector processor and are executed thereat. The modifiability and scalability of the modem is significantly improved relative to conventional modem devices.

US Patent:

20100142590, Jun 10, 2010

Filed:

Dec 8, 2006

Appl. No.:

12/448037

Inventors:

Thomas Höhne - Helsinki, FI
Gang Xu - Allen TX, US

International Classification:

H04B 1/707

US Classification:

375141, 375E01002

Abstract:

A method comprising: selecting an available orthogonal spreading code from a set of orthogonal spreading codes that are used for separating overlapping radio transmissions in a spread spectrum multiple access communication system; spreading a predetermined sequence using the selected spreading code; transmitting the spread predetermined sequence as a calibrating radio transmission; detecting a calibration signal corresponding to the calibrating radio transmission; and using the detected calibration signal to modify subsequent radio transmissions within the spread spectrum multiple access communication system.

US Patent:

20120257682, Oct 11, 2012

Filed:

Apr 9, 2012

Appl. No.:

13/442248

Inventors:

ANAND G. DABAK - PLANO TX, US
GANG XU - ALLEN TX, US

Assignee:

TEXAS INSTRUMENTS INCORPORATED - Dallas TX

International Classification:

H04B 3/54

US Classification:

375257

Abstract:

A method of power line communications includes obtaining timing information for an AC mains signal transmitted on a power line in a power line communication (PLC) system that includes at least one receiver and at least one other device connected on the power line which provides variable loading during cycles of the AC mains signal. A first loading interval within at least a first cycle of the cycles having lower loading and at least a second loading interval within said first cycle having higher loading are identified using the timing information. At least one data packet is transmitted only during the first loading interval over the power line to the receiver.

US Patent:

20120320932, Dec 20, 2012

Filed:

Jun 20, 2012

Appl. No.:

13/528667

Inventors:

GANG XU - ALLEN TX, US
RAMANUJA VEDANTHAM - ALLEN TX, US
KUMARAN VIJAYASANKAR - DALLAS TX, US
ANAND G. DABAK - PLANO TX, US
TARKESH PANDE - DALLAS TX, US
IL HAN KIM - DALLAS TX, US
XIAOLIN LU - PLANO TX, US

Assignee:

TEXAS INSTRUMENTS INCORPORATED - Dallas TX

International Classification:

H04L 29/02
H04B 3/54

US Classification:

370474

Abstract:

A method of powerline communications including a first node and at least a second node on a PLC channel in a PLC network. The first node sends a physical layer (PHY) data frame on the PLC channel including a preamble, PHY header, a MAC header and a MAC payload. The PHY header includes a destination address field having a destination address therein. The second node receives the data frame. The second node compares its network address to the destination address before decoding the MAC header and MAC payload, providing power savings by allowing the second node to not decode the MAC header or MAC payload if its network address does not match the destination address in the PHY header of the data frame.

US Patent:

20120320996, Dec 20, 2012

Filed:

Jun 18, 2012

Appl. No.:

13/526227

Inventors:

ANAND G. DABAK - PLANO TX, US
TARKESH PANDE - DALLAS TX, US
IL HAN KIM - DALLAS TX, US
RAMANUJA VEDANTHAM - ALLEN TX, US
KUMARAN VIJAYASANKAR - DALLAS TX, US
GANG XU - ALLEN TX, US

Assignee:

TEXAS INSTRUMENTS INCORPORATED - Dallas TX

International Classification:

H04B 3/00

US Classification:

375257

Abstract:

A method of powerline communications between a plurality of nodes on a powerline communications (PLC) channel including a first node and a second node. At least one communication quality measure is determined for the PLC channel. Based on the communication quality measure, a preamble of a data frame is dynamically switched between a reference preamble having a reference symbol length including a reference number of syncP symbols and a reference number of syncM symbols and at least a first extended preamble having an extended symbol length that is greater than (>) the reference symbol length. The data frame is then transmitted on the PLC channel.

US Patent:

20120324322, Dec 20, 2012

Filed:

Jun 20, 2012

Appl. No.:

13/528191

Inventors:

RAMANUJA VEDANTHAM - ALLEN TX, US
GANG XU - ALLEN TX, US
KUMARAN VIJAYASANKAR - DALLAS TX, US
ANAND G. DABAK - PLANO TX, US
TARKESH PANDE - DALLAS TX, US
IL HAN KIM - DALLAS TX, US
XIAOLIN LU - PLANO TX, US

Assignee:

TEXAS INSTRUMENTS INCORPORATED - Dallas TX

International Classification:

H03M 13/09
G06F 11/10

US Classification:

714807, 714E11032

Abstract:

A method of powerline communications including a first node and at least a second node on a powerline communications (PLC) channel in a PLC network. The first node sends a physical layer (PHY) data frame on the PLC channel including a preamble, a PHY header, a MAC header and a MAC payload. The MAC header includes a Cyclic Redundancy Check (CRC) field (MH-CRC field). The second node receives the data frame, parses the MAC header to reach the MH-CRC field, and performs CRC verification using the MH-CRC field to verify the MAC header. If the CRC verification is successful, (i) the second node parses another portion of the MAC header to identify a destination address of the data frame and (ii) to determine whether the data frame is intended for the second node from the destination address.

US Patent:

20130094552, Apr 18, 2013

Filed:

Oct 11, 2012

Appl. No.:

13/650125

Inventors:

TEXAS INSTRUMENTS INCORPORATED - Dallas TX, US
Gang Gary Xu - Allen TX, US
Donald P. Shaver - Dallas TX, US

Assignee:

TEXAS INSTRUMENTS INCORPORATED - Dallas TX

International Classification:

H04B 1/38

US Classification:

375222

Abstract:

Systems and methods are disclosed for communicating on a pilot wire between Electric Vehicle Service Equipment (EVSE) and an Electric Vehicle (EV). In an example embodiment, a modem is coupled to the pilot wire that couples the EVSE and the EV. The modem transmits both pulse width modulation (PWM) command signals and power line communication (PLC) signals to a remote device via the pilot wire. The modem interleaves the PWM and PLC signals on the pilot wire so that latency requirements for the PWM signals are maintained. The modem supports parallel protocol stacks in which PLC signals are processed in a first path and PWM signals are processed in a second path that bypasses the first path and provides the PWM signals directly to a MAC layer. The modem may create a modified frame for the PLC signals to maintain the latency requirements.

US Patent:

20130188670, Jul 25, 2013

Filed:

Jul 19, 2012

Appl. No.:

13/553204

Inventors:

Yanjun SUN - Richardson TX, US
Gang Xu - Allen TX, US
Bhadra Sandeep - Dallas TX, US
Xiaolin Lu - Plano TX, US
Ariton E. Xhafa - Plano TX, US
Minghua Fu - Plano TX, US
Robert Liang - Frisco TX, US
Susan Yim - Plano TX, US

Assignee:

TEXAS INSTRUMENTS INCORPORATED - Dallas TX

International Classification:

H04B 3/58
H04B 3/54

US Classification:

375211, 375219

Abstract:

An electronic communication device comprises a first transceiver capable of a bi-directional communication session on a first communication medium; a second transceiver capable of a bi-directional communication session on a second communication medium; and a control logic coupled to the first transceiver and the second transceiver, wherein the control logic is configured to receive, from the first transceiver, a first signal, and cause, in response to the first signal, data transmitted by the first transceiver on the first communication medium as part of a communication session to be transmitted instead by the second transceiver on the second communication medium while the first transceiver continues to receive data as part of the communication session.