Experimental study of capacity approaching general LDPC coded non-uniform shaping modulation format
Changyu Lin, Zhen Qu, Tao Liu, Ding Zou, Ivan B. Djordjević · 2016
We experimentally demonstrate the efficiency of nonbinary GF(3)/GF(32) LPDC-coded non-uniform 9-QAM. We propose the non-uniform design method and low-complexity decoder. The proposed 9-QAM has >3dB gain in symbol OSNR compared to traditional binary LDPC-coded star-8-QAM.