Ultra wide-range frequency offset estimation for digital coherent optical receivers
US8463121B2 · kind B2 · utility
4Cited by
2References
20Claims
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Key dates
| Filing date | Oct 12, 2010 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Dec 22, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/6165
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Methods and systems for receiving an optical signal using cascaded frequency offset estimation. Coherently detecting an optical signal includes compensating for a coarse laser frequency offset between a transmitting laser and a local oscillator laser by determining a maximum phase error (MPE) in the optical signal, compensating for a residual laser frequency offset between the transmitting laser and the local oscillator laser, and decoding data stored in the optical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.