Bidirectional transmission system, especially one using optical fiber, employing a single carrier for both transmission directions
US5408350A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1994 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Sep 21, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2587
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
This bidirectional transmission system, especially one using optical fiber, between a source terminal and a user terminal employing a single carrier for both transmission directions obtained from a source in the source terminal characterized in that it comprises for each transmission direction means for modulating one parameter of said carrier, this parameter being intensity for the two directions and subject in all cases to the condition that the modulation applied first for transmission in the downward direction from the source terminal to the user terminal the depth of modulation is sufficiently high to leave sufficient power for application of the second modulation to which that applied second can be applied for transmission in the upward direction from the user terminal to the source terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.