Abstract
This Letter proposes a nonlinear-tolerant two-dimensional distribution matcher (2D-DM) scheme. It removes the corner points of probabilistically shaped quadrature amplitude modulation (QAM) to obtain better nonlinear tolerance. Because the remaining number of points is not a power of 2, we propose to divide constellation points into different layers and symbols. Then, the proposed 2D-DM performs matching using one-dimensional shapers, which generates the in-phase and quadrature components of QAM together. In fact, it realizes two-dimensional shapers from one-dimensional shapers. Simulation results show that two-dimensional shapers generated by the proposed 2D-DM have higher tolerance to power amplifier nonlinearity and fiber nonlinearity compared to one-dimensional shapers.
© 2024 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Mengfan Fu, Yicheng Xu, Xiaomin Liu, Yu Guo, Weisheng Hu, and Qunbi Zhuge
Opt. Lett. 49(4) 943-946 (2024)
Xishuo Wang, Qi Zhang, Jianjun Yu, Xiangjun Xin, Kai Lv, Ran Gao, Jianxin Ren, Feng Tian, Qinghua Tian, Chuxuan Wang, Xiaolong Pan, Yongjun Wang, Dong Guo, and Leijing Yang
Opt. Lett. 45(17) 4883-4886 (2020)
Can Zhao, Bin Chen, Yi Lei, Shen Li, Jiaqi Cai, Daohui Hu, Wenkai Fang, and Lin Sun
Opt. Lett. 49(8) 1997-2000 (2024)