高速光通信的前向纠错技术研究
Research on Super-FEC technology for high-rate optical communications
高速光通信 超级前向纠错 博斯-查德胡里-霍昆格姆 低密度单奇偶校验 级联码 high-rate optical communication Super-FEC BCH LDPC concatenated code
摘要
根据高速光通信系统对于OSNR (光信噪比)的要求, 提出了一种基于非规则LDPC(低密度单奇偶校验)长码的Super-FEC(超级前向纠错)方案。Super-FEC方案采用以不同进制的BCH(博斯-查德胡里-霍昆格姆)码为外码, LDPC码为内码的级联方式。针对系统不同的码率需求, 分别设计了不同的级联构造形式。仿真结果表明, 这些Super-FEC方案的净编码增益为6.18~7.63 dB, 高于传统方案。
Abstract
In line with the requirements of high-rate optical communication systems for Optical Signal-to-Noise-Ratio (OSNR), this paper proposes a Super-FEC scheme based on an irregular Low-Density Parity-Check (LDPC) long code. This scheme uses the BCH code in different systems as the outer code and the LDPC code as the concatenated way of the inner code. In view of the needs of the systems for different bit rates, it designs different concatenated structural forms. In the simulation, the net coding gains of these Super-FEC schemes are in the range of 6.18~7.63 dB, which are higher than those of the traditional schemes.
陈昶, 邱琪, 苏君, 郭勇. 高速光通信的前向纠错技术研究[J]. 光通信研究, 2012, 38(5): 5. Chen Chang, Qiu Qi, Su Jun, Guo Yong. Research on Super-FEC technology for high-rate optical communications[J]. Study On Optical Communications, 2012, 38(5): 5.
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