Low power GPS receiver system and method of using same
US6212133A · kind A · utility
Inventors
Key dates
| Filing date | Jul 26, 1999 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Jul 26, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04R60/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A new and improved low power GPS signal receiver system includes a GPS signal receiver device and control processor for powering up the signal receiver device for a first sufficient period of time to locate and acquire a time signal from a single GPS satellite and then powering down the GPS signal receiver device after establishing a local time and for waiting another sufficient period of time after receiving a user request to update time before powering up the signal receiver device to facilitate about an immediate sync on another GPS navigation message subframe indicative of the time maintained by said single GPS satellite vehicle. Once the second sufficient period of time has elapsed, the control processor powers up the GPS signal receiver device for a third sufficient period of time to acquire and process 29 bits of subframe message information indicative of time maintained by the GPS satellite vehicle. Once the time maintained by such a single GPS satellite vehicle has been obtained and processed, the control processor powers downs the GPS signal receiver device to a low power standby mode to wait for another user request to update time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.