Navigation data prediction for GPS and GLONASS weak signal tracking
US6731701B2 · kind B2 · utility
21Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2001 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Sep 3, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70715
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Prediction methods for navigation message symbols of satellite systems, such as GPS (Global Positioning System) and GLONASS (Global Orbiting Navigation System), that use information repetition in navigation data messages are disclosed. The methods enable one to eliminate the impact of symbol modulation for a received signal on the threshold performance of any navigation receiver, thereby permitting its operation in severe environments when the carrier-to-noise ratio C/N0 of “weak” satellite signals falls to levels below C/N0=20 dB*Hz.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.