Autonomous data aided GPS signal acquisition method and system
US6295024A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1999 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Feb 19, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A data-aided system and method of GPS signal acquisition from a plurality of broadcasted GPS signals includes receiving (401) the GPS signals and providing a digitized signal. Then, a first portion (407) of the digitized signal is correlated to a code replica and a real-time code phase delay is determined. A capture start time is determined (411) dependent on a Time Of Arrival (409) based on the determined real-time code phase delay. Next, a second portion of the digitized signal is captured into a memory (413) commencing coincident with the determined capture start time. Then the second portion of the digitized signal is extracted from the memory and correlated to the code replica (411) to determine an off-line code phase delay. A position fix is calculated (417) and includes the off-line code phase delay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.