公开(公告)号：US20140195878A1

公开(公告)日：2014-07-10

申请号：US14122290

申请日：2012-06-15

Applicant: ALCATEL LUCENT

Inventor： Luca Razzetti ,  Carlo Costantini ,  Marianna Pepe ,  Andreas Leven ,  Stephan Ten Brink ,  Laurent Schmalen

IPC: H04L1/00

CPC classification number: H04L1/0045 ,  H04B10/6165 ,  H04L1/0047 ,  H04L1/005 ,  H04L1/0054 ,  H04L1/0057

Abstract: Proposed is a method of decoding a differentially encoded PSK modulated optical data signal carrying FEC encoded data values. The optical signal is corrected by an estimated phase offset. From the corrected signal, respective likelihood values for the FEC encoded data values are derived, using an estimation algorithm which accounts for a differential encoding rule used for differentially encoding the optical signal. The derived likelihood values are limited to a predetermined range of values. From the limited likelihood values, FEC decoded data values are derived, using an algorithm which accounts for a FEC encoding rule used for FEC encoding the FEC encoded data values.

Abstract translation: 提出了对携带FEC编码数据值的差分编码的PSK调制光数据信号进行解码的方法。 光信号通过估计的相位偏移来校正。 从校正的信号中，使用考虑用于对光信号进行差分编码的差分编码规则的估计算法，导出FEC编码数据值的相应似然值。 导出的似然值被限制在预定的值范围内。 从有限似然值中，使用考虑用于FEC编码FEC编码数据值的FEC编码规则的算法导出FEC解码数据值。