Chun H Lee

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:

8238280, Aug 7, 2012

Filed:

Feb 6, 2009

Appl. No.:

12/367492

Inventors:

Kuo-Chun Lee - San Diego CA, US
Patrick Lim - San Diego CA, US
Yu Wang - San Diego CA, US
Chun Woo Lee - San Ramon CA, US
Guangming Carl Shi - San Diego CA, US
Jong Ro Park - San Ramon CA, US
Tom Chin - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

G08C 17/00

US Classification:

370311, 4553431, 455574

Abstract:

Certain embodiments of the present disclosure allow data for a second connection to be exchanged while the second connection is in a low power state that overlaps with a listening interval of a first connection.

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:

8385261, Feb 26, 2013

Filed:

Jan 22, 2009

Appl. No.:

12/358043

Inventors:

Kuo-Chun Lee - San Diego CA, US
Patrick Lim - San Diego CA, US
Tom Chin - San Diego CA, US
Wei Zhang - San Diego CA, US
Yu Wang - San Diego CA, US
Chun Woo Lee - San Ramon CA, US
Fangqi Hu - San Diego CA, US
Guangming Shi - San Diego CA, US
Feng Guo - San Diego CA, US
Ta Yan Siu - San Diego CA, US
Doo Seok Kim - San Diego CA, US
Jong Ro Park - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04W 28/00

US Classification:

370328, 3703953, 714748

Abstract:

Methods and apparatus for setting the connection identifier (CID) mask length of a Hybrid Automatic Repeat-Request (HARQ)-MAP or a SUB-MAP pointer information element (IE) in a compressed downlink map (DL-MAP) of an orthogonal frequency-division multiple access (OFDMA) frame are provided in an effort to reduce the number of false indications in the CID mask, while also striving, as a secondary concern, to reduce the CID mask length. In this manner, an individual mobile station (MS) may not waste processing, battery power, or time interpreting a HARQ-MAP message or a sub downlink/uplink map (SUB-DL-UL-MAP) message that was not intended for this particular MS. For some embodiments where the CID mask length is set to be small, the control overhead (i. e. , the size of the HARQ-MAP or the SUB-MAP pointer IE) may be decreased, and more of the OFDMA frame may be available for data traffic.

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:

8443247, May 14, 2013

Filed:

Oct 13, 2009

Appl. No.:

12/577778

Inventors:

Quanzhu Duan - San Diego CA, US
Chun Woo Lee - San Diego CA, US
Jong Ro Park - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

G08C 25/02

US Classification:

714748

Abstract:

Embodiments of the present disclosure allow a HARQ transmitter to provide a receiver an indication of the protocol data units (PDUs) that should not be expected because they are part of a data burst that has been retransmitted a maximum allowable number of times. The indication message may contain a maximum serial number contained in the data burst that has reached the maximum number of retransmissions, or the serial number of a first PDU in the next data burst.