High-sensitivity satellite positioning system receivers and reception methods
US6683564B1 · kind B1 · utility
Assignees
Inventor
Key dates
| Filing date | Nov 19, 2002 |
| Grant date | Jan 27, 2004 |
| Priority date | — |
| Expiry date | Nov 19, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/25
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A navigation satellite receiver method determines what navData is on-hand, what level of time uncertainty exists, and what position uncertainty there is for the receiver at turn-on. Indoor and outdoor search engines are used that can vary their search windows and dwell times to increase receiver sensitivity. Received signals are stored in several playback loops that can be operated in parallel to increase search sensitivity in the face of large uncertainties in time ad frequency, and still reduce the time-to-first-fix. Satellite acquisition can be achieved even when the navData is too weak to be read by requesting help from a server.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.