Local oscillator frequency offset compensation in a coherent optical signal receiver
US8340530B2 · kind B2 · utility
4Cited by
6References
20Claims
0Family size
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Key dates
| Filing date | Mar 5, 2010 |
| Grant date | Dec 25, 2012 |
| Priority date | — |
| Expiry date | Aug 15, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/223
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system and method implementing dual stage carrier frequency offset compensation (FOC) in a coherent receiver for an optical communication system. In the first stage, a feed forward FOC function compensates for relatively slowly drifting frequency offsets. In a second stage, a decision-feedback FOC function compensates for relatively quickly drifting frequency offsets. The feed forward frequency offset compensation may be implemented with a feed forward carrier phase estimation function and the decision-feedback frequency offset compensation may be implemented with a decision-feedback carrier phase estimation function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.