Method and apparatus for tone tracking in wireless optical communication systems
US6483621B1 · kind B1 · utility
11Cited by
16References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2000 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Jul 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/1121
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmitted light signal, such as laser light, is modulated by a data signal and by a tracking signal. The tracking signal has a modulation depth that is substantially smaller than a peak-to-peak amplitude of the light signal. At reception, the tracking signal is recovered from the modulated light signal and is used to determine an orientation of a receiver with respect to the transmitted light signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.