应用于40Gb/s DQPSK光通信系统的LDPC译码算法研究

Decoding Algorithm of LDPC for 40 Gb/s Decoding Algorithm in DQPSK Optical Communication System

针对40Gb/s差分正交相移键控(DQPSK)光通信传输系统,提出了低密度奇偶校验(low-density parity-check,LDPC)码译码算法的信息初始化公式,改进了基于置信度传播(belief propagation,BP)的译码算法,并进行了相应的数值仿真和性能分析比较,得到了兼顾性能和译码复杂度的改进型译码算法。

For 40 Gb/s DQPSK optical communication transmission system, an information initial formula of decoding algorithm for low-density parity-check （LDPC） codes is proposed, and the decoding algorithm based on belief propagation （BP） is improved. Furthermore, the numerical simulation and the performance analysis and comparison are implemented. Then the advanced decoding algorithm which has a good tradeoff between performance and complexity is obtained.