07236883 is referenced by 111 patents and cites 184 patents.

The invention relates to an aided Global Positioning System (GPS) subsystem within a wireless device. The wireless device includes a wireless processing section capable of receiving signals from a wireless network and a GPS subsystem having a radio frequency (RF) front-end capable of receiving a GPS satellite signal. The wireless processing section of the wireless device receives an external clock and determines the offset between the clock in the wireless processing section and that of the external clock. The GPS subsystem then receives the offset information from the wireless processing section, information related to the nominal frequency of the wireless processing section clock and the wireless processing section clock. Using this information and the GPS clock in the GPS subsystem, the GPS subsystem determines an acquiring signal, which is related to a frequency offset between the GPS clock and the network clock. The GPS subsystem then acquires GPS satellite signals in an acquiring unit though the use of the acquiring signal.

Title
Aiding in a satellite positioning system
Application Number
10/515808
Publication Number
7236883 (B2)
Application Date
December 4, 2003
Publication Date
June 26, 2007
Inventor
Nicolas Patrick Vantalon
Nice
FR
Gengsheng Zhang
Cupertino
CA, US
Leon Kuo Liang Peng
Mountain View
CA, US
Lionel Jacques Garin
Palo Alto
CA, US
Agent
The Eclipse Group
Assignee
Sirf Technology
CA, US
IPC
G01C 21/00
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