Infrastructure-aiding for satellite navigation receiver and method
US6473030B1 · kind B1 · utility
102Cited by
3References
16Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 28, 2001 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Feb 28, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/41
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A navigation system comprises a cell-phone, a base cellular telephone site, and a webserver. Each is paired with a GPS receiver. The GPS receiver associated with the cell-phone is aided with information received from the cell-site and webserver that help reduce satellite search uncertainty. Time difference and/or frequency difference measurements are taken with data collected from what the cell-phone and its GPS receiver assume to be accurate time and frequency. Correction information is used in post-processing of the velocity solutions computed by the cell-phone to arrive at more precise determinations for the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.