Irregular QC-LDPC based multi-level coded modulation scheme for the next generation optical communication systems
Dongdong Wang, Liqian Wang, Xue Chen, Chen Ai Ju, Zhirong Wang, Aimei Fei, Huitao Wang, Qi Zhang · 2017
In this paper, we mainly focus on the optimization of multi-level coded modulation scheme in terms of sub-channel code rate optimal assignment and irregular QC-LDPC code construction with the aid of EXIT chart analysis. Simulation results show that the proposed MLCM scheme can achieve additional 0.1dB NCG compared with the UEP coded modulation scheme.