【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。更多还原

【Abstract】 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) coding technologies for DWDM systems are proposed after the development trend of DWDM optical communication systems and the theory of the concatenated-code 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-code 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.更多还原