Optical receiver having transient compensation
US7415213B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 24, 2004 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | May 31, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/695
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical receiver having compensation for signal level transients. The receiver includes an OE converter, a transient threshold compensator, a threshold combiner and a CDR system. The OE converter receives the incoming optical signal and provides a modulated electrical signal having a high speed response for tracking the modulation on the optical signal and an averaged electrical signal having a moderate speed response for tracking changes in the average level of the optical signal. The transient threshold compensator processes the averaged electrical signal for providing a transient feedforward adjustment. The threshold combiner combines the transient feedforward adjustment with a lower speed BER feedback threshold adjustment for providing a decision threshold signal. The CDR system uses the decision threshold signal for recovering a clock, providing the BER feedback threshold adjustment, and estimating the data carried by the modulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.