Multi-level modulation receiving device
US7630650B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2007 |
| Grant date | Dec 8, 2009 |
| Priority date | — |
| Expiry date | Jun 22, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/677
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multi-level modulation receiving device for adaptively compensating for chromatic dispersion and polarization mode dispersion with high precision. Each equalizing filter has at least one variable parameter as a weight therefor and equalizes the waveform of a corresponding channel signal in accordance with an averaged variable parameter value. A signal quality monitor monitors the signal quality of the filter output signal, and a variable parameter value calculator calculates a variable parameter value to be set as the variable parameter, in accordance with the signal quality. A variable parameter averaging unit averages the variable parameter values calculated for respective channels, to generate an averaged variable parameter value, and sends the averaged variable parameter value to the equalizing filters such that the same weight is set in the equalizing filters associated with the n channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.