Secondary code determination in a snapshot receiver based upon transmission time alignment
US11947019B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2021 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Mar 26, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/23
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The carrier phase ready coherent acquisition of a global navigation satellite system (GNSS) snapshot signal includes receiving in a snapshot receiver different GNSS signals from correspondingly different GNSS satellites, and performing multi-hypothesis (MH) acquisition upon each of GNSS signal in order to produce a complete set of secondary code index hypotheses, each hypothesis producing a corresponding acquisition result according to an identified peak at a correct code-phase and Doppler frequency. The secondary code index hypotheses are adjusted for each different GNSS signal based upon a flight time difference determined for each GNSS satellite, so as to produce a new set of hypotheses. Finally, one of the hypotheses in the new set may be selected as a correct hypothesis according to a predominate common index amongst the hypotheses in the new set, and the acquisition results for each of the different GNSS signals may be filtered utilizing the correct hypothesis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.