Open AccessStokes space modulation format classification based on non-iterative clustering algorithm for coherent optical receivers
Author(s) -
Xiaofeng Mai,
Jie Liu,
Xiong Wu,
Qun Zhang,
Changjian Guo,
Yanfu Yang,
Zhaohui Li
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.002038
Subject(s) - quadrature amplitude modulation , phase shift keying , cluster analysis , computer science , modulation (music) , algorithm , signal to noise ratio (imaging) , optics , bit error rate , physics , telecommunications , artificial intelligence , decoding methods , acoustics
A Stokes-space modulation format classification (MFC) technique is proposed for coherent optical receivers by using a non-iterative clustering algorithm. In the clustering algorithm, two simple parameters are calculated to help find the density peaks of the data points in Stokes space and no iteration is required. Correct MFC can be realized in numerical simulations among PM-QPSK, PM-8QAM, PM-16QAM, PM-32QAM and PM-64QAM signals within practical optical signal-to-noise ratio (OSNR) ranges. The performance of the proposed MFC algorithm is also compared with those of other schemes based on clustering algorithms. The simulation results show that good classification performance can be achieved using the proposed MFC scheme with moderate time complexity. Proof-of-concept experiments are finally implemented to demonstrate MFC among PM-QPSK/16QAM/64QAM signals, which confirm the feasibility of our proposed MFC scheme.