GPS receiving system
US6480787B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2001 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Jul 13, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64G1/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A global positioning system (GPS) receiving system which achieves an equivalent synchronization in time measurement of GPS signals utilizing software without requiring highly accurate synchronization for receiver clocks with time information embedded in the GPS signals. The GPS receiving system performs a relative navigation process after correcting a pseudorange with a time tag error which is attributable to inaccuracy of receiver clocks of first and second moving objects. A relative navigation process correcting an absolute error of a time tag with a clock bias is also described. A differential computation unit calculates a difference between the first pseudorange and the second pseudorange commonized by the time tag commonizing unit. Correction in a time tag error correction unit is performed for the selected GPS data with a common GPS satellite identification number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.