NDLI: A Multistage CPE Scheme Based on Crossed Constellation Transformation for M-QAM

Content Provider	IEEE Xplore Digital Library
Author	Xiaofei Su Lixia Xi Xianfeng Tang Zhaomin Zhang Shunchang Bai Wenbo Zhang Xiaoguang Zhang
Copyright Year	1989
Abstract	A multistage carrier phase estimation (CPE) scheme for any m-ary quadrature amplitude modulation (QAM) formats is proposed and analyzed in coherent optical communication systems. The scheme is based on the crossed constellation transformation algorithm that is transparent to all modulation formats whose constellations are on the square grid. Simulation results show that the hardware complexity of the proposed CPE scheme can be significantly reduced by the group factors of 6.1/8.6, 4.7/6, and 2.6/3.3 (in the form of multipliers/adders) for 32-QAM, 64-QAM, and 128-QAM compared with the singlestage blind phase search algorithm. In 32-QAM, 64-QAM, and 128-QAM, coherent optical communication systems with 1-dB SNR penalty at bit error rate is 1 × 10^-2, the comparable linewidth symbol duration can be reached with the values of 6 × 10^-5, 4 × 10^-5, and 8 × 10^-6, respectively.
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	77
Ending Page	80
Page Count	4
File Size	2533016
File Format	PDF
ISSN	10411135
Volume Number	27
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase shift keying Phase noise Complexity theory Phase estimation Partitioning algorithms Signal to noise ratio Constellation diagram quadrature amplitude modulation Optical communications phase noise coherent detection carrier phase estimation
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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