System, method, apparatus and means for constructing building tomography and timing information
US6900758B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2002 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | Feb 3, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/41
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A server provides GPS aiding data to mobile GPS receivers are provided with an enclosed environment (e.g., within a large building) where the received GPS signal is likely to be weak or suffer multipath signal interference. The server receives GPS signals from one or more antennas within the enclosed environment and measures the multipath error in the vicinity of each antenna. Using the multipath error data for various satellite positions at various times, the server creates a delay model for the enclosed environment to generate GPS aiding data for the mobile GPS receivers. A generic delay model can be created that is applicable to similarly constructed buildings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.