Sample timing control in an optical receiver
US7894728B1 · kind B1 · utility
62Cited by
13References
7Claims
0Family size
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Key dates
| Filing date | Oct 17, 2006 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Nov 26, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0004
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of compensating phase error between parallel digital signals of a received optical signal, in a coherent optical receiver. A phase differential between the digital signals is determined. A digital skew is imposed between the digital signals, an amount of skew imposed being an integer number of sample periods calculated to most nearly compensate the phase differential. The skewed digital signals are then digitally processed, in the frequency domain, to compensate a residual portion of the phase differential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.