Jin Chun Dai

US Patent:

7092725, Aug 15, 2006

Filed:

Oct 22, 2002

Appl. No.:

10/278502

Inventors:

Jon J. Anderson - Boulder CO, US
Jin Dai - San Diego CA, US
Francis M. Ngai - Louisville CO, US
Edward B. Victor - Louisville CO, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04Q 7/20

US Classification:

4554566, 455427, 455 121, 455 6711

Abstract:

A system and method for determining timing offset errors in a low earth orbit satellite system based upon Doppler and Doppler rate of change is provided. A user terminal determines first and second timing offsets respectively associated with first and second satellite beams from respective first and second satellites. Next, the user terminal determines the Doppler and Doppler rate of change associated with the first and second satellite beams. A timing offset is estimated from the measured Doppler and Doppler rate of change and is then compared with the user terminal's own determined timing offset. If the comparison does not produce a value within a predetermined threshold, a beam identification error is declared.

US Patent:

7260411, Aug 21, 2007

Filed:

Dec 7, 2005

Appl. No.:

11/297557

Inventors:

Jon J. Anderson - Boulder CO, US
Jin Dai - San Diego CA, US
Francis M. Ngai - Louisville CO, US
Edward B. Victor - Louisville CO, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04Q 7/20

US Classification:

4554566, 455427, 455 121, 455 6711

Abstract:

A system and method for determining timing offset errors in a low earth orbit satellite system based upon Doppler and Doppler rate of change is provided. A user terminal determines first and second timing offsets respectively associated with first and second satellite beams from respective first and second satellites. Next, the user terminal determines the Doppler and Doppler rate of change associated with the first and second satellite beams. A timing offset is estimated from the measured Doppler and Doppler rate of change and is then compared with the user terminal's own determined timing offset. If the comparison does not produce a value within a predetermined threshold, a beam identification error is declared.

US Patent:

7324815, Jan 29, 2008

Filed:

Apr 15, 2003

Appl. No.:

10/413702

Inventors:

David J. Ross - San Diego CA, US
Jason B. Kenagy - San Diego CA, US
Jin Dai - San Diego CA, US
Tia M. Cassett - San Diego CA, US
Daniel H. Agre - San Diego CA, US
Mazen Chmaytelli - San Diego CA, US
Arne Croizat Joseph Mortensen - San Diego CA, US
Ravinder Chandhok - Poway CA, US
Patrick Tierney - San Diego CA, US
Paul M. Seckendorf - San Diego CA, US
Mo Ip - San Diego CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04Q 7/20

US Classification:

455425, 455423, 455419

Abstract:

A system, method, and program for remotely interacting with a diagnostic interface resident on wireless computer devices. The wireless device provides an accessible diagnostic interface that allows reads and/or writes to device resident diagnostic data and tools. Through use of the interaction, wireless device status data and network status data can be gathered and utilized, and if so embodied, the diagnostic tools resident on the wireless devices can be manipulated to alter wireless device operation.

US Patent:

8539918, Sep 24, 2013

Filed:

Feb 12, 2010

Appl. No.:

12/658696

Inventors:

James U. Lemke - La Jolla CA, US
Gordon E. Rado - Carlsbad CA, US
Michael H. Wahl - Bonita CA, US
Patrick R. Lee - San Diego CA, US
Eric P. Dion - Encinitas CA, US
Jin Dai - San Diego CA, US
Louis F. Medeiros - Oceanside CA, US
Tristan M. Burton - San Diego CA, US
Ryan G. MacKenzie - San Diego CA, US
Brendan M. Lenski - Carlsbad CA, US
Todd R. Rose - San Diego CA, US
Clark A. Klyza - San Diego CA, US

Assignee:

Achates Power, Inc. - San Diego CA

International Classification:

F02B 75/18

US Classification:

123 522, 123 51 R, 123 4181, 123 4183, 123 4184

Abstract:

Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The unitary support structure includes cooling manifolds that provide liquid coolant to the cylinder liners. Exhaust and intake manifolds attached to the support structure to serve respective ports in the cylinder liner. The engine constructions may also include certain improvements in the construction of cooled pistons with flexible skirts, and in the construction of cylinders with sealing structures mounted outside of exhaust and inlet ports to control lubricant in the cylindrical interstice between the through bore and the pistons.

US Patent:

7263351, Aug 28, 2007

Filed:

Jul 1, 2002

Appl. No.:

10/187760

Inventors:

David J. Ross - San Diego CA, US
Jason B. Kenagy - San Diego CA, US
Jin Dai - San Diego CA, US
Tia M. Cassett - San Diego CA, US
Daniel H. Agre - San Diego CA, US
Mazen Chmaytelli - San Diego CA, US
Arne Croizat Joseph Mortensen - San Diego CA, US
Ravinder Chandhok - Poway CA, US

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H04M 3/00

US Classification:

455419, 455420, 455423, 455 6711

Abstract:

A system, method, and program for optimizing a wireless network having at least data communication between computer devices selectively connected thereto, and at least one of the computer devices is a remotely located wireless device. The wireless device has a resident network optimization application that causes the selective transmission of network status data to at least one other computer device on the wireless network, and either the data-receiving computer device or another computer device on the wireless network optimizes the wireless network based upon the received network status data.

US Patent:

62982389, Oct 2, 2001

Filed:

Sep 9, 1998

Appl. No.:

9/150077

Inventors:

Jin Dai - San Diego CA

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

G01S 502
H04B 7185

US Classification:

455456

Abstract:

An apparatus, method, and process for quickly and accurately determining the position of a user terminal in a satellite communications system. An initial coarse estimate of the radius of the Earth at a terminal position is made. The geometry of satellites being used and the user terminal is then determined. When only one satellite is used, the satellite-user terminal geometry includes the range and range rate of the satellite with respect to the user terminal. When two satellites are used, the satellite-user terminal geometry includes the range of each satellite with respect to the user terminal. An initial position estimate is determined based on the radius and the satellite-user terminal geometry. The coarse radius estimate can then be formed into a fine estimate and the initial position estimate further refined.

US Patent:

61374415, Oct 24, 2000

Filed:

Sep 9, 1998

Appl. No.:

9/150500

Inventors:

Jin Dai - San Diego CA
Nadav Levanon - Ramat-Gan, IL
Bill Ames - Poway CA
Ed Victor - Louisville CO
Jim Determan - Encinitas CA

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H04B 7185
G01S 502

US Classification:

34235716

Abstract:

The present invention is a system and method for accurately determining the distance (range) between one or more satellites and a user terminal and the rate of change (range rate) of that distance. When accurately determined according to the present invention, these quantities can be used to determine the location of the user terminal with a high degree of accuracy. When one satellite is available, the present invention determines the range and range rate based on the Doppler frequency shift that a signal experiences between the satellite and the user terminal, the round trip delay a signal experiences during transmission from the satellite to the user terminal and back via a satellite to a gateway, the Doppler frequency shift a signal experiences between the satellite and the gateway, and the timestamps of the measurements. When a second satellite is available, the present invention determines the range and range rate between the second satellite and the user terminal based on the round trip delay, the Doppler frequency shift that a signal experiences between the second satellite and the user terminal, and the difference in arrival times at the user terminal of the signals from the satellites.