Methods and apparatus for flexible overhead forward error correction (FEC) sub-system for optical fiber communication systems
US9906243B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2016 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Mar 24, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/516
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In some embodiments, an apparatus includes an optical transceiver which includes a rate-adaptive forward error correction (FEC) encoder and a rate-adaptive FEC decoder. The rate-adaptive FEC encoder is configured to adjust a number of a set of known symbols associated with a codeword to achieve rate adaption. A length of the codeword is fixed. The rate-adaptive FEC encoder is configured to generate the codeword based on (1) a set of information symbols including the set of known symbols and a set of data symbols, and (2) a fixed number of a set of parity symbols generated using information symbols. The rate-adaptive FEC decoder is configured to receive a set of reliability values associated with a channel word, and expand the set of reliability values to produce an expanded set of reliability values. The rate-adaptive FEC decoder is further configured to decode the expanded set of reliability values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.