Power series correction in a linear fiber optic analog transmission system and method
US5528405A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1995 |
| Grant date | Jun 18, 1996 |
| Priority date | — |
| Expiry date | Jan 5, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/6972
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and system for improving the linearity of an analog transmission in a multichannel fiber optic transmission system uses a power series correction derived from a non-information bearing portion of a received transmission. A notch filter reduces the energy in a portion of a guard band between channels before transmission so that the energy in the notch-filtered portion of the received transmission is indicative of the non-linearities introduced by the analog transmission system. The energy of the notch-filtered portion of a received transmission is represented by a power series that is inverted and provided as a correction to the received transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.