Procedure for the independent reduction of acquisition thresholds and tracking of spread spectrum codes received in orbit
US6014404A · kind A · utility
3Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 28, 1997 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | Jul 28, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70715
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A procedure for independently reducing acquisition thresholds and tracking spread spectrum codes received in orbit by a receiver accessing an orbital navigator (internal or external to said receiver), wherein the receiver includes a phase loop and a code loop. The code loop that tracks the pseudo-random codes is "impelled" by a fine velocity aid and corrects the error between the real and calculated velocities. The code loop receiving pseudo-random codes is similarly "impelled" by the fine velocity aid, the code phase search being based on a phase prediction maintained by the fine velocity aid provided by the orbital navigator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.