Beacon multiplexing for alignment of free space optical communication terminals
US11387899B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2021 |
| Grant date | Jul 12, 2022 |
| Priority date | — |
| Expiry date | Sep 24, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A local free space optical (FSO) terminal senses an external environment that includes at least two beacons transmitted from a remote FSO terminal. The local terminal is configured to sense the beacons at a frame rate. Each beacon comprises a pulse train with pulses that are transmitted at a pulse rate. The pulse trains are temporally offset relative to each other so that pulses from at least one of the pulse trains do not fall across frame boundaries during sensing, regardless of a temporal location of the frame boundaries. In addition to detecting the at least two beacons, the local terminal is configured to identity the beacon that contains pulses that do not fall across the frame boundaries, and adjust its orientation based on the identified beacon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.