Radiolocalization receiver and signal processor
US7474261B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 20, 2006 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Oct 20, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/23
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Pseudo-range processor (20) for a satellite radiolocalization receiver (100) having access to an auxiliary clock (38) used to clock an auxiliary reference timer (40). The auxiliary reference timer (40) is periodically sampled (170) during tracking, in relation to the GPS time kept by the main clock. The processor allows intermittent operations, between periods in a low-power sleep mode during which correlators (25) and main clock (37) are inactive. On wake-up a new sample is taken of the auxiliary reference timer (40), which allows an estimation of the most likely position of the correlation peaks (123a-c). The correlation engine can therefore directly start to search for peaks in appropriate code phase windows, with a high probability of immediate reacquisition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.