Determining the change in time at a mobile terminal
US8103294B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2008 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Sep 10, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/256
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a terminal 106 having a receiver 202 for receiving the signals from plural transmission sources 101-105 whose positions and transmission time offsets are unknown within the terminal, a method is provided for determining the change in the time (elapsed time) at the terminal between two instants. At a first position of the terminal a first set of measurements, aligned to a first instant, of a signal parameter representative of the time or phase of receipt of said signals from said plural transmission sources relative to one or more of them, or to a reference, or to a terminal clock is obtained. Then at a second position of the terminal a corresponding second set of measurements, aligned to a second instant, of a signal parameter representative of the time or phase of receipt of said signals from said plural transmission sources relative to one or more of them, or to the reference, or to the terminal clock is also obtained. The aligned measurements of the first and second sets are combined, and the time elapsed between the first and second instants is calculated from the change in the combined aligned measurements of the first and second sets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.