公开(公告)号：US09906243B1

公开(公告)日：2018-02-27

申请号：US15080285

申请日：2016-03-24

Applicant: Juniper Networks, Inc.

Inventor： Murat Arabaci ,  Marianna Pepe ,  Philip A. Thomas ,  David Ofelt ,  Massimiliano Salsi

IPC: H03M13/00 ,  H03M13/35 ,  H04B10/40 ,  H03M13/11

CPC classification number: H03M13/116 ,  H03M13/618 ,  H04B10/40

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.

公开(公告)号：US10547333B1

公开(公告)日：2020-01-28

申请号：US15904921

申请日：2018-02-26

Applicant: Juniper Networks, Inc.

Inventor： Murat Arabaci ,  Marianna Pepe ,  Philip A. Thomas ,  David Ofelt ,  Massimiliano Salsi

IPC: H03M13/00 ,  H03M13/35 ,  H03M13/11 ,  H04B10/40

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.