DWDM系统中的前向纠错级联码  

Concatenated forward error correction code in DWDM systems

作　　者：袁建国[1] 蒋泽[2] 毛幼菊[2] 叶文伟[2] 王巍[2] 

机构地区：[1]重庆大学光电工程学院,重庆400044 [2]重庆邮电学院光纤通信研究所,重庆400065

出　　处：《激光杂志》2007年第2期67-69,共3页Laser Journal

基　　金：国家863计划项目(2005AA123730);重庆邮电大学自然(A2006-53)

摘　　要：本文通过对DWDM光通信系统的发展趋势和级联码的理论进行分析后,对DWDM系统中现有的前向纠错(FEC)编码技术提出了内外型、并行型和连续型的三种级联码改进方案。通过理论分析与仿真结果表明:内外型级联码冗余度过大,并行型级联码的译码实现过于复杂,而连续型级联码是一种纠错性能优良,冗余度适中、易于实现的码型,更适用于高速DWDM系统。In this paper, the three concatenated coding schemes of the inner - outer type, the parallel type and the consecutive type on improving the current Forward Error Correction （FEC） ceding technologies for DWDM systems are proposed after the development trend of DWDM optical communication systems and the theory of the concatenated - cede are analyzed. The theoretical analyses and simulation results show that the inner - outer concatenated - code has the greater redundancy and the decoding of the parallel concatenated- cede are too complex, however, the consecutive concatenated - codes are a superior coding scheme with the advantages such as the better error correction performance, moderate redundancy and easy implementation, therefore, it can better be used in high - speed DWDM systems.

关 键 词：DWDM系统 超强前向纠错(Super-FEC) 级联码 净编码增益(NCG) 

分 类 号：TN929.11[电子电信—通信与信息系统]