Unscented Kalman Filter with Joint Decision Scheme for Phase Estimation in Probabilistically Shaped QAM Systems

被引：1

作者：

Gao, Yuan ^{[1
,2
,3
]}

Li, Zhipei ^{[4
]}

Guo, Dong ^{[4
]}

Dong, Ze ^{[4
]}

Zhu, Lei ^{[4
]}

Chang, Huan ^{[4
]}

Zhou, Sitong ^{[1
,2
,3
]}

Wang, Yongjun ^{[1
,2
,3
]}

Tian, Qinghua ^{[1
,2
,3
]}

Tian, Feng ^{[1
,2
,3
]}

Yang, Leijing ^{[1
,2
,3
]}

机构：

[1] Beijing Univ Posts & Telecommun BUPT, Sch Elect Engn, Beijing 100876, Peoples R China

[2] Beijing Univ Posts & Telecommun, Key Lab Space Ground Interconnect & Convergence, Beijing 100876, Peoples R China

[3] Beijing Univ Posts & Telecommun BUPT, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China

[4] Beijing Inst Technol BIT, Sch Informat & Elect, Beijing, Peoples R China

来源：

ELECTRONICS | 2023年 / 12卷 / 19期

基金：

中国国家自然科学基金; 国家重点研发计划; 中国博士后科学基金;

关键词：

unscented Kalman filter; coherent optical communications; carrier phase recovery; MAP detection; probabilistic shaping; CARRIER RECOVERY; NOISE;

D O I：

10.3390/electronics12194075

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

A carrier phase estimation method based on the unscented Kalman filter (UKF) is proposed for probabilistically shaped (PS) quadrature amplitude modulation (QAM) systems. We further integrate a joint decision scheme into the proposed UKF-based algorithm to prevent the correlated erroneous decisions in the phase recovery scheme caused by the impact of PS. The proposed method achieves the performance benefit for PS constellations in optical transmissions by partitioning the constellation symbols suitably and utilizing both the maximum a posterior probability (MAP) and maximum likelihood (ML) detection. The results of numerical simulation and experimental verification reveal that the proposed method performs better than the conventional CPR algorithms in PS systems.

引用

页数：13

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