GPS receiving apparatus and GPS satellite signal receiving method
US7209514B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2003 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | Apr 2, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/35
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a GPS receiving apparatus including a synchronous acquisition unit and a synchronous hold unit. The synchronous acquisition unit detects a correlation between a spread code of a received signal from a GPS satellite and a spread code provided by the apparatus in order to detect a phase of the spread code of the received signal and a carrier frequency of the received signal. The synchronous hold unit has a plurality of channels and allocates one of the channels to one of a plurality of GPS satellites. The synchronous hold unit also establishes initial values based on the spread code phase of the received signal following detection by the synchronous acquisition unit as well as on the likewise-detected carrier frequency of the received signal, before starting synchronous hold of the spread code and the carrier frequency regarding the signal from the GPS satellite in question while decoding the signal from the GPS satellite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.