针对超强前向纠错(FEC)技术在先纤通信系统中的应用。文章提出了一种构造简单、编码容易实现的低密度奇偶校验(LDPC)码的构造方法。并仿真验证了该LDPC码在先纤信道环境下的译码性能。与常用的RS(255,239)码相比,在相同的码效率下。所构造的码长为4080的LDPC码能够获得比RS码高2dB的编码增益。
This paper proposes a Low-Density Parity-Check (LDPC) code, which is simple in structure and easy m encoding, as a Super Forward Error Correction (FEC) code for fiber-optic communication systems. Its decoding performance in fiber paths is simulated and verified. Compared with the commonly used RS (255, 239) FEC code, the proposed LDPC code with the same code efficiency can achieve about 2 dB coding gain at a code length of 4 080 higher than RS code.