Zero mean carrier recovery
US8315528B2 · kind B2 · utility
9Cited by
7References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2009 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Jan 25, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/65
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of data symbol recovery in a coherent receiver of an optical communications system. Two or more SYNC bursts, having a known symbol sequence and periodicity, are processed to derive an estimate of a frequency offset Δf between a transmit laser and a Local Oscillator (LO) of the receiver. A phase rotation κ(n) is computed based on the estimate of the frequency offset Δf, and applied to a plurality of data symbol estimates to generate corresponding rotated symbol estimates. The rotated symbol estimates are then filtered to generate corresponding decision values of each data symbol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.