Aiding in a satellite positioning system
US7236883B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2003 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Dec 4, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/254
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.