Study on multi-symbol differential detection techniques for high-rate coherent optical communications

Li Wei; Jin Xin; Dang Qian; Wang Wenjin; Liao Wei; Gao Guanjun

doi:10.13756/j.gtxyj.2015.03.004

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Study on multi-symbol differential detection techniques for high-rate coherent optical communications

- Study on multi-symbol differential detection techniques for high-rate coherent optical communications
- Study on Optical communication Issue 3, Pages: 12-15(2015)
- 作者机构：
  
  1. 国网甘肃省电力公司信息通信公司
  2. 北京邮电大学信息光子学与光通信国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2015.03.004
  CLC： TN929.1
- Published：2015，
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[1]李炜,金鑫,党倩,汪文晋,廖伟,高冠军.高速相干光通信中的多符号差分检测技术研究[J].光通信研究,2015(03):12-15.

Li Wei, Jin Xin, Dang Qian, et al. Study on multi-symbol differential detection techniques for high-rate coherent optical communications. [J]. (3):12-15(2015)
[1]李炜,金鑫,党倩,汪文晋,廖伟,高冠军.高速相干光通信中的多符号差分检测技术研究[J].光通信研究,2015(03):12-15. DOI： 10.13756/j.gtxyj.2015.03.004.

Li Wei, Jin Xin, Dang Qian, et al. Study on multi-symbol differential detection techniques for high-rate coherent optical communications. [J]. (3):12-15(2015) DOI： 10.13756/j.gtxyj.2015.03.004.

摘要

针对高速相干光通信系统中激光器相位噪声和频偏估计的补偿问题

设计了基于MSDD（多符号差分检测）的相位恢复算法

研究了在ASE（自激发射放大）噪声、激光器线宽和频偏等因素影响下的系统性能和MSDD算法的补偿能力。仿真结果表明

自适应MSDD算法对激光器线宽和频偏的补偿效果显著

对线宽为1 MHz、频偏为100 MHz的20GBaud QPSK（正交相移键控）系统

误码率为10-3时的OSNR（光信噪比）代价仅为0.6dB。

Abstract

For the compensation of the laser phase noise and frequency offset estimation in high-rate coherent optical communication systems

a Multi-Symbol Differential Detection（MSDD）-based phase recovery algorithm is designed and the system performances and MSDD compensation capabilities under the influence of ASE noise

laser linewidth and frequency offset are studied.Simulation results show that this algorithm produces significant compensation effects on the laser linewidth and frequency offset.Specifically

for a 20 GBaud QPSK modulated system with 1MHz linewidth and 100 MHz frequency offset

the OSNR penalty is only 0.6dB when its BER is 10-3.

关键词

相干光通信激光器相位噪声相位恢复多符号差分检测

Keywords

coherent optical communicationlaser phase noisephase recoveryMSDD

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