Flexible DAML phase estimation algorithm in coherent optical M-PSK systems

Ping Wang; Jian Chen; Xiaodi You; Xue Liu; Zhaohui Ma; Changyuan Yu

doi:10.1360/N092016-00119

Flexible DAML phase estimation algorithm in coherent optical M-PSK systems

Ping Wang, Jian Chen, Xiaodi You, Xue Liu, Zhaohui Ma, Changyuan Yu

Research output: Journal article publication › Journal article › Academic research › peer-review

Abstract

Decision-aided maximum likelihood (DAML) phase estimation has been applied in coherent optical communication systems due to its high computational efficiency. However, conventional DAML algorithm only considers constant laser phase noise over the entire block length, thus causing block length effect. Given time-varying laser phase noise, a flexible DAML phase estimation algorithm is proposed in coherent optical M-PSK systems, which can eliminate the block length effect of conventional DAML. Weighted coefficients are introduced to estimate carrier phase more accurately than the conventional algorithm. Meanwhile, the phase estimation error is derived and simulations justify its validity. Simulation results also show that the flexible DAML algorithm can eliminate the block length effect of conventional DAML and relax the requirement of laser linewidth in coherent optical M-PSK systems.

Original language	English
Pages (from-to)	1271-1278
Number of pages	8
Journal	Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica
Volume	46
Issue number	12
DOIs	https://doi.org/10.1360/N092016-00119
Publication status	Published - 1 Dec 2016

Keywords

Block length effect
Carrier phase estimation
Coherent optical communications
Decision-aid maximum likelihood (DAML)
M-PSK

ASJC Scopus subject areas

Control and Systems Engineering
Computer Networks and Communications

More information

10.1360/N092016-00119

Cite this

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title = "Flexible DAML phase estimation algorithm in coherent optical M-PSK systems",

abstract = "Decision-aided maximum likelihood (DAML) phase estimation has been applied in coherent optical communication systems due to its high computational efficiency. However, conventional DAML algorithm only considers constant laser phase noise over the entire block length, thus causing block length effect. Given time-varying laser phase noise, a flexible DAML phase estimation algorithm is proposed in coherent optical M-PSK systems, which can eliminate the block length effect of conventional DAML. Weighted coefficients are introduced to estimate carrier phase more accurately than the conventional algorithm. Meanwhile, the phase estimation error is derived and simulations justify its validity. Simulation results also show that the flexible DAML algorithm can eliminate the block length effect of conventional DAML and relax the requirement of laser linewidth in coherent optical M-PSK systems.",

keywords = "Block length effect, Carrier phase estimation, Coherent optical communications, Decision-aid maximum likelihood (DAML), M-PSK",

author = "Ping Wang and Jian Chen and Xiaodi You and Xue Liu and Zhaohui Ma and Changyuan Yu",

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T1 - Flexible DAML phase estimation algorithm in coherent optical M-PSK systems

AU - Wang, Ping

AU - Chen, Jian

AU - You, Xiaodi

AU - Liu, Xue

AU - Ma, Zhaohui

AU - Yu, Changyuan

PY - 2016/12/1

Y1 - 2016/12/1

N2 - Decision-aided maximum likelihood (DAML) phase estimation has been applied in coherent optical communication systems due to its high computational efficiency. However, conventional DAML algorithm only considers constant laser phase noise over the entire block length, thus causing block length effect. Given time-varying laser phase noise, a flexible DAML phase estimation algorithm is proposed in coherent optical M-PSK systems, which can eliminate the block length effect of conventional DAML. Weighted coefficients are introduced to estimate carrier phase more accurately than the conventional algorithm. Meanwhile, the phase estimation error is derived and simulations justify its validity. Simulation results also show that the flexible DAML algorithm can eliminate the block length effect of conventional DAML and relax the requirement of laser linewidth in coherent optical M-PSK systems.

AB - Decision-aided maximum likelihood (DAML) phase estimation has been applied in coherent optical communication systems due to its high computational efficiency. However, conventional DAML algorithm only considers constant laser phase noise over the entire block length, thus causing block length effect. Given time-varying laser phase noise, a flexible DAML phase estimation algorithm is proposed in coherent optical M-PSK systems, which can eliminate the block length effect of conventional DAML. Weighted coefficients are introduced to estimate carrier phase more accurately than the conventional algorithm. Meanwhile, the phase estimation error is derived and simulations justify its validity. Simulation results also show that the flexible DAML algorithm can eliminate the block length effect of conventional DAML and relax the requirement of laser linewidth in coherent optical M-PSK systems.

KW - Block length effect

KW - Carrier phase estimation

KW - Coherent optical communications

KW - Decision-aid maximum likelihood (DAML)

KW - M-PSK

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Flexible DAML phase estimation algorithm in coherent optical M-PSK systems

Abstract

Keywords

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