Method and apparatus for correlating signals received from a navigation satellite system
US9178561B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2014 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Sep 10, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/708
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A plurality of samples of a signal are stored in a buffer, the signal corresponding to a navigation system. A plurality of starting locations in the buffer are determined, the plurality of starting locations corresponding to a plurality of correlations to be calculated. A plurality of correlations are calculated using i) a plurality of local replica signals, and ii) data read from the buffer using the plurality of starting locations, the local replica signals corresponding to pseudo random number (PRN) codes utilized by transmitting devices in the navigation system. The plurality of correlations are utilized to one or more of i) detect PRN codes in the signal, ii) detect one or more phase shifts associated with PRN codes, or iii) detect one or more frequency shifts associated with PRN codes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.