Chun Hua Wang

US Patent:

7639181, Dec 29, 2009

Filed:

Dec 29, 2006

Appl. No.:

11/618131

Inventors:

Chun Wang - San Mateo CA, US
Shaowei Han - Palo Alto CA, US

Assignee:

SiRF Technology Holdings, Inc. - San Jose CA

International Classification:

H01S 1/00

US Classification:

34235712

Abstract:

A Global Navigation Satellite System (GNSS) receiver and associated method capable of tracking weak GNSS signals from a plurality of GNSS satellites. In a preferred embodiment, code and carrier tracking loops are initially closed around the code phase, carrier frequency, and data bit edge estimates handed over from an acquisition mode. In subsequent tracking, early, prompt, and late copies of the code replica are correlated with the incoming signal. The prompt correlations are coherently integrated over an extended updating interval for data bit edge and sign estimation as well as for carrier phase and frequency error discrimination whereas the early and late correlations are used for code error discrimination. Code delay and carrier phase and frequency errors are used to update the code and carrier tracking loop filters. Together with data bits, they form observables of a GNSS signal's time and frequency parameters for timing and position fixing.

US Patent:

20110003175, Jan 6, 2011

Filed:

Jan 7, 2010

Appl. No.:

12/684070

Inventors:

Bogdan Florin Valcu - Fremont CA, US
Qixu Chen - Milpitas CA, US
Connie Chunling Liu - San Jose CA, US
Chun Wang - Fremont CA, US
Shoutao Wang - Fremont CA, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/33
G11B 5/84

US Classification:

428800, 427127

Abstract:

A perpendicular magnetic recording layer may include a hard granular layer, an exchange break layer formed on the hard granular layer, and a soft granular layer formed on the exchange break layer. In some embodiments, the exchange break layer may consist essentially of ruthenium. In some embodiments, the perpendicular magnetic recording layer may include n magnetic layers and n−1 exchange break layers, where n is greater than or equal to three, and where the n−1 exchange break layers alternate with the n magnetic layers in the magnetic recording layer.

US Patent:

20120135274, May 31, 2012

Filed:

Nov 30, 2010

Appl. No.:

12/957372

Inventors:

CHUN WANG - Fremont CA, US
Connie Liu - San Jose CA, US
Xiaoding Ma - Fremont CA, US
Li Tang - Fremont CA, US

International Classification:

G11B 5/66
B05D 5/12

US Classification:

4288281, 427131, 428800, 428827

Abstract:

A magnetic film or layer includes a non-hexagonal close pack (non-hcp) structure.

US Patent:

20220221976, Jul 14, 2022

Filed:

Jan 13, 2021

Appl. No.:

17/148366

Inventors:

- Palo Alto CA, US
Yu Lou - Palo Alto CA, US
Anandram Sundar - Santa Clara CA, US
Chun Kai Wang - Sunnyvale CA, US
Jack Mousseau - Palo Alto CA, US
Kevin May - Oakland CA, US
Xing Zhang - Santa Clara CA, US
Geng Yan - San Carlos CA, US

International Classification:

G06F 3/0481
G06F 3/0486
G06F 3/0484

Abstract:

A virtual vertical surface in a three-dimensional space that represents a physical room may be detected. Responsive to a first user input gesture, movement of a virtual object within the three-dimensional space may be displayed. The movement may be to a first location in which a portion of the virtual object intersects a portion of the virtual vertical surface. A virtual vertical surface designator may be displayed corresponding to the virtual vertical surface based at least in part on the portion of the virtual object intersecting the portion of the virtual vertical surface. Upon determining that a second user input gesture meets or exceeds a movement threshold, movement of the three-dimensional object from the first location to a second location within the three-dimensional space may be displayed. The second location may appear beyond the virtual vertical surface.