TY - JOUR
T1 - Probabilistic Shaping Four-dimensional Modulation with Soft Decision for Self-Homodyne Coherent Detection Systems
AU - Wu, Tianze
AU - Tian, Feng
AU - Li, Yutian
AU - Zhang, Qi
AU - Gao, Ran
AU - Yao, Haipeng
AU - Dong, Ze
AU - Tian, Qinghua
AU - Wang, Fu
AU - Xin, Xiangjun
N1 - Publisher Copyright:
IEEE
PY - 2024
Y1 - 2024
N2 - We demonstrate a probabilistic shaping (PS) four-dimensional (4D) modulation in self-homodyne coherent transmission system. The 4D modulation is based on inter-symbol amplitude translation (AT) to perform set partitioning. The distribution of constellation points after AT is optimized by de-DC. The parity bits produced by the AT are transmitted with the pilot tone by remapping. In addition, a soft decision for this 4D-PS signal is proposed. An experiment of self-homodyne coherent ultra-high order 4D signal transmission based on two cores of a 7-core fiber is demonstrated with a spectral efficiency of 16.37 bit/s/Hz. The 4D signals with soft decision can provide up to 0.78 bit/symbol and 1.85 bit/symbol gain compared to normal polarization division multiplexing signals and hard-decision 4D signals.
AB - We demonstrate a probabilistic shaping (PS) four-dimensional (4D) modulation in self-homodyne coherent transmission system. The 4D modulation is based on inter-symbol amplitude translation (AT) to perform set partitioning. The distribution of constellation points after AT is optimized by de-DC. The parity bits produced by the AT are transmitted with the pilot tone by remapping. In addition, a soft decision for this 4D-PS signal is proposed. An experiment of self-homodyne coherent ultra-high order 4D signal transmission based on two cores of a 7-core fiber is demonstrated with a spectral efficiency of 16.37 bit/s/Hz. The 4D signals with soft decision can provide up to 0.78 bit/symbol and 1.85 bit/symbol gain compared to normal polarization division multiplexing signals and hard-decision 4D signals.
KW - Four dimensional modulation
KW - Modulation
KW - Optical fiber communication
KW - Optical fiber devices
KW - Optical fiber networks
KW - Optical fiber polarization
KW - Optical transmitters
KW - Symbols
KW - optical communication
KW - probabilistic shaping
KW - quadrature amplitude modulation
KW - self-homodyne coherent detection
KW - set partitioning
KW - soft decision
UR - http://www.scopus.com/inward/record.url?scp=85189332032&partnerID=8YFLogxK
U2 - 10.1109/TCOMM.2024.3381664
DO - 10.1109/TCOMM.2024.3381664
M3 - Article
AN - SCOPUS:85189332032
SN - 1558-0857
SP - 1
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
ER -
