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Chin. Opt. Lett.
 Home  List of Issues    Issue 11 , Vol. 14 , 2016    10.3788/COL201614.110601


Decision-free radius-directed Kalman filter for universal polarization demultiplexing of square M-QAM and hybrid QAM signals
Yanfu Yang1, Qun Zhang1, Yong Yao1, Guoliang Cao1, Kangping Zhong2, Xian Zhou2, Alan Pak Tao Lau2, and Chao Lu3
1 Department of Electronic and Information Engineering, Shenzhen Graduate School, [Harbin Institute of Technology], Shenzhen 51 8055, China
2 Photonics Research Center, Department of Electrical Engineering, [The Hong Kong Polytechnic University], Hong Kong, China
3 Photonics Research Center, Department of Electronic and Information Engineering, [The Hong Kong Polytechnic University], Hong Kong, China

Chin. Opt. Lett., 2016, 14(11): pp.110601

DOI:10.3788/COL201614.110601
Topic:Fiber optics and optical communication
Keywords(OCIS Code): 060.1660  120.3930  

Abstract
We propose and experimentally demonstrate a universal and blind polarization-state tracking scheme for M-quadrature amplitude modulation (QAM) signals based on a decision-free radius-directed linear Kalman filter (RD-LKF). The polarization tracking performance is investigated through simulation and experiments for both quadrature phase-shift keying (QPSK) and 16-QAM signals. The influence of the filter parameters on the static polarization demultiplexing performance and dynamic tracking capability are discussed via simulation. The optimization strategy of the filter parameters in modulation-format-independent scenarios is proposed and simulations are carried out to evaluate the polarization demultiplexing penalty for QPSK, 16QAM, and hybrid QPSK/16QAM signals. Finally, the proposed decision-free RD-LKF is experimentally compared to the respective algorithms of constant modulus algorithm and multimodulus algorithm for QPSK and 16-QAM and the advantage of ultrafast polarization tracking ability is confirmed.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Received:2016/5/18
Accepted:2016/9/9
Posted online:2016/10/14

Get Citation: Yanfu Yang, Qun Zhang, Yong Yao, Guoliang Cao, Kangping Zhong, Xian Zhou, Alan Pak Tao Lau, and Chao Lu, "Decision-free radius-directed Kalman filter for universal polarization demultiplexing of square M-QAM and hybrid QAM signals," Chin. Opt. Lett. 14(11), 110601(2016)

Note: This work was supported by the National Natural Science Foundation of China (Nos. 61205046, 61401020, and 61575051), the Shenzhen Municipal Science and Technology Plan Project (Nos. JCYJ20150327155705357, KQCX2015032409501296, and JSGG20150529153336124, and JCYJ20150529114045265), and the Hong Kong Government General Research Fund (GRF) (No. PolyU 152079/14E).



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