Abstract

We consider probabilistic amplitude shaping (PAS) as a means of increasing the spectral efficiency of fiber-optic communication systems. In contrast to previous works in the literature, we consider probabilistic shaping with hard decision decoding (HDD). In particular, we apply the PAS recently introduced by Böcherer et al. to a coded modulation (CM) scheme with bit-wise HDD that uses a staircase code as the forward error correction code. We show that the CM scheme with PAS and staircase codes yields significant gains in spectral efficiency with respect to the baseline scheme using a staircase code and a standard constellation with uniformly distributed signal points. Using a single staircase code, the proposed scheme achieves performance within 0.57–1.44 dB of the corresponding achievable information rate for a wide range of spectral efficiencies.

© 2017 IEEE

Probabilistically shaped coded modulation for IM/DD system

Zonglong He, Tianwai Bo, and Hoon Kim
Opt. Express 27(9) 12126-12136 (2019)

Experimental and numerical comparison of probabilistically shaped 4096 QAM and a uniformly shaped 1024 QAM in all-Raman amplified 160 km transmission

Seiji Okamoto, Masaki Terayama, Masato Yoshida, Keisuke Kasai, Toshihiko Hirooka, and Masataka Nakazawa
Opt. Express 26(3) 3535-3543 (2018)

Polar coded probabilistic amplitude shaping for the free space optical atmospheric turbulence channel

Jiafei Fang, Meihua Bi, Shilin Xiao, Hang Yang, Zhiyu Chen, Zhiyang Liu, Fan Yang, and Weisheng Hu
Opt. Express 28(22) 33208-33219 (2020)

Polar coded probabilistic shaping PAM8 based on many-to-one mapping for short-reach optical interconnection

Honghang Zhou, Yan Li, Xiaoshuo Jia, Chao Gao, Yuyang Liu, Jifang Qiu, Xiaobin Hong, Hongxiang Guo, Yong Zuo, and Jian Wu
Opt. Express 29(7) 10209-10220 (2021)

On line rates, information rates, and spectral efficiencies in probabilistically shaped QAM systems

Junho Cho, Xi Chen, Sethumadhavan Chandrasekhar, and Peter Winzer
Opt. Express 26(8) 9784-9791 (2018)