Abstract
We proposed a spiral 16-QAM system based on cascaded Kalman filters. The spiral 16-QAM signal has larger Euclidean distance and minimum angular distance than that of the traditional square 16-QAM signal. The cascaded Kalman filters enable us to suppress the phase noise caused by the laser linewidth to a great degree. These advantages enhance the noise tolerance of the proposed system. Simulation are performed on the spiral 16-QAM signal and the traditional square 16-QAM signal to evaluate the system’s robustness of the laser linewidth and the signal and noise ratio.
© 2018 The Author(s)
PDF ArticleMore Like This
Ankita Jain, Pradeep Kumar K., Pascal Landais, and Prince M. Anandarajah
Tu3A.3 International Conference on Fibre Optics and Photonics (Photonics) 2016
Cao Guoliang, Yang Yanfu, Kang Ping Zhong, Cui Lantao, Rong Ning, Jian Gu, and Yao Yong
ATh3A.134 Asia Communications and Photonics Conference (ACP) 2014
Jihong Liu and Gee-Kung Chang
83092J Asia Communications and Photonics Conference and Exhibition (ACP) 2011