Location determination system and method therefor
US6972719B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2004 |
| Grant date | Dec 6, 2005 |
| Priority date | — |
| Expiry date | Sep 30, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A location determination system (100) utilizes a low accuracy timing infrastructure (106) to synchronize a personal tracking device (120) having high accuracy timing location determination devices integrated therein. The PTD (120) includes a radio frequency (RF) location unit (102) and integrated sensors, such as altimeter (132), GPS receiver (134) and inertial navigation unit (IMU) (136). The RF location unit (102) receives a synchronization command from the low accuracy timing infrastructure (106) and provides timing data representing range information in response thereto. The range information is used by the high accuracy timing infrastructure (180) to compute updated X, Y, Z coordinates of the PTD (120).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.