Method and device for chronologically synchronizing a location network
US7616682B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 2002 |
| Grant date | Nov 10, 2009 |
| Priority date | — |
| Expiry date | Sep 14, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/43
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Chronologically synchronizing a unique positing signal generated by a positioning-unit device at a known location with a reference positioning signal generated by a reference transmitter at a known geometric distance. The positioning-unit device receives and interprets a reference positioning signal. It then generates and transmits a unique positioning signal, wherein the unique positioning signal is aligned with a frequency steerable clock. The positioning-unit device then receives the unique positioning signal. The positioning-unit device then adjusts the frequency of the frequency steerable clock by an amount derived from a measured frequency difference. The positioning-unit device then determines a reference positioning signal propagation delay between the reference transmitter and the positioning-unit device. At this stage, a time difference is measured between the received reference positioning signal and the received unique positioning signal. Finally, the frequency steerable clock is offset for a period of time derived from the measured time difference and the determined propagation delay and the unique positioning signal is consequently adjusted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.