Chun Ping Lee

Address:

6509 Washington Blvd, Arlington, VA 22205

VIN:

2FMDK36C87BB59061

Make:

FORD

Model:

EDGE

Year:

2007

US Patent:

6727512, Apr 27, 2004

Filed:

Nov 5, 2002

Appl. No.:

10/289005

Inventors:

Stan Stokowski - Danville CA
Damon F. Kvamme - San Jose CA
Chun Shen Lee - Cupertino CA
Donald W. Pettibone - San Jose CA

Assignee:

KLA-Tencor Technologies Corporation - Milpitas CA

International Classification:

G01B 902

US Classification:

25055945, 348125

Abstract:

Provided are apparatus and methods for detecting phase defects. The invention relies generally on the distortion of light as it passes through defects in phase shift masks to detect these defects. Light traveling through a defect, such as a bump in an etched area will travel at a different angle than light traveling through air. In order to enhance the signals generated from the defects, the invention in several embodiments provides a multiple element detector having at least four elements, arranged in a radially symmetric configuration. Individual elements of the detector are selected to form a differential signal based on the configuration of pattern lines in the area proximate to the defect. The resulting differential signal is used to generate an image signal and to identify phase defects.

US Patent:

8374286, Feb 12, 2013

Filed:

Jun 19, 2008

Appl. No.:

12/142770

Inventors:

Chun Woo Lee - San Ramon CA, US
Jong Hyeon Park - San Jose CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H03K 9/00
H04L 27/00

US Classification:

375316, 455130

Abstract:

A method and apparatus for decoding encoded data bits of a wireless communication transmission are provided. A set of a-priori bit values corresponding to known bit values of a response message expected to be transmitted in response to a previously transmitted message. Example expected response messages include clear to send (CTS) messages transmitted in response to request to send (RTS) messages and positive acknowledgement (ACK) messages transmitted in response to messages with data payloads.

US Patent:

8392811, Mar 5, 2013

Filed:

Jan 7, 2008

Appl. No.:

11/970373

Inventors:

Chun Woo Lee - San Ramon CA, US
Jong Hyeon Park - San Jose CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H03M 13/00
H03M 13/03
H04L 27/06

US Classification:

714799, 714795, 714794, 714792, 714811, 375341

Abstract:

A method and apparatus for decoding encoded data bits of a wireless communication transmission are provided. A set of a-priori bit values corresponding to known bit values of the encoded data bits may be generated. Decoding paths that correspond to decoded data bits that are inconsistent with the a-priori bit values may be removed from the possible decoding paths to consider, and decoding the encoded data bits by selecting a decoding path from remaining decoding paths of the possible decoding paths that were not removed. A-priori bit values may be extracted from various messages, such as DL-MAP, UL-MAP, RNG-REQ, and BW-REQ messages.

US Patent:

8406342, Mar 26, 2013

Filed:

Jun 19, 2008

Appl. No.:

12/142770

Inventors:

Chun Woo Lee - San Ramon CA, US
Jong Hyeon Park - San Jose CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H03K 9/00
H04L 27/00

US Classification:

375316, 455130

Abstract:

A method and apparatus for decoding encoded data bits of a wireless communication transmission are provided. A set of a-priori bit values corresponding to known bit values of a response message expected to be transmitted in response to a previously transmitted message. Example expected response messages include clear to send (CTS) messages transmitted in response to request to send (RTS) messages and positive acknowledgement (ACK) messages transmitted in response to messages with data payloads.

US Patent:

8411638, Apr 2, 2013

Filed:

Jun 23, 2008

Appl. No.:

12/144586

Inventors:

Chun Woo Lee - San Ramon CA, US
Shan Qing - San Diego CA, US
Tom Chin - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04W 4/00

US Classification:

370331, 455438

Abstract:

Certain embodiments provide techniques for background scanning in a wireless communication device receiving signals from multiple base stations using a background scanning processor separate from a receive processor. The techniques generally include buffering raw signal data from multiple base stations, forwarding the raw signal data to a receive baseband processor for decoding data from a first one of the base stations that is currently designated as a serving base station with an active connection to the wireless communications device, forwarding the raw signal data to a background scanning processor, separate from the receive baseband processor, and generating channel characteristics corresponding to the multiple base stations with the background scanning processor without interrupting the exchange of data with the first base station designated as the serving base station.

US Patent:

8483041, Jul 9, 2013

Filed:

Jun 12, 2008

Appl. No.:

12/137540

Inventors:

Chun Woo Lee - San Ramon CA, US
Doo Seok Kim - Pleasanton CA, US
Je Woo Kim - Cupertino CA, US

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H04J 11/00

US Classification:

370208, 370310, 370328, 370329, 370330, 455403, 4554221, 455450

Abstract:

Methods and apparatus for allocating a data region (termed “sticky region allocation”) in an orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) frame so that a user terminal can receive/send data bursts for multiple OFDM/OFDMA frames, rather than inserting a MAP information element (MAP IE) for each user terminal in every frame, are provided. In this manner, the size of the control overhead, such as the downlink (DL) and uplink (UL) MAP messages, may be reduced. The reduced control overhead may increase the frame resources available for data traffic and thus, may boost the overall efficiency and performance of wireless systems using OFDM/OFDMA.

US Patent:

8498607, Jul 30, 2013

Filed:

Jun 12, 2008

Appl. No.:

12/137978

Inventors:

Jong Ro Park - San Ramon CA, US
Chun Woo Lee - San Ramon CA, US
Kyoung Cheol Oh - Pleasanton CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04B 1/16
H04B 1/38
H04M 1/00

US Classification:

4553431, 4553432, 455574, 370311, 370349

Abstract:

Techniques for signaling a mobile communications device in a special operating state that data bursts contain messages relevant to the special operating state. The signaling may be implemented using one or more bits in a frame control header (FCH). As a result, the mobile communication device may be decode the FCH first and decode data bursts only if there is an indication the data bursts contain a relevant message. Power savings may be achieved at the mobile communications device by avoiding decoding data bursts with no relevant messages.

US Patent:

8526390, Sep 3, 2013

Filed:

Jul 18, 2008

Appl. No.:

12/176276

Inventors:

Doo Seok Kim - Pleasanton CA, US
Guangming Carl Shi - San Diego CA, US
Chun Woo Lee - San Ramon CA, US

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H04W 4/00

US Classification:

370330, 375259, 375260

Abstract:

Methods and apparatus for allocating, modifying, and terminating a fixed data region (termed “sticky region allocation”) in an orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) frame are provided. With sticky region allocation, the sticky region may be negotiated during the establishment of a connection between a base station and a user terminal, and a single MAP information element (MAP IE) may inform the user terminal of the location of the sticky region. Then, a user terminal can receive/send data bursts for a certain connection in multiple OFDM/OFDMA frames without needing a MAP IE for locating each burst in subsequent frames. Accordingly, the size of the control overhead, such as the downlink (DL) and uplink (UL) MAP messages, may be reduced. The reduced control overhead may increase the frame resources available for data traffic and thus, may boost the overall efficiency and performance of OFDM/OFDMA wireless systems.