Differential Modulation and Phase Noise Compensation of CO-OFDMA-PON System

LIU Ziyue; LI Zhengxuan; YANG Qinyao; GAO Qi; WANG Liang; SONG Yingxiong

doi:10.13756/j.gtxyj.2026.240177

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Differential Modulation and Phase Noise Compensation of CO-OFDMA-PON System

更新时间：2026-03-03

- Differential Modulation and Phase Noise Compensation of CO-OFDMA-PON System
- Study on Optical Communications Issue 1, (2026)
- 作者机构：
  
  上海大学　特种光纤与光接入网省部共建重点实验室，上海　 200444
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2026.240177
  CLC： TN929
- Received：15 August 2024，
  
  Revised：2024-09-10，
  
  Published：10 February 2026
- 稿件说明：
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刘紫玥，李正璇，杨勤尧，等. 差分调制及相干OFDMA-PON系统相位噪声补偿[J]. 光通信研究，2026(1): 240177.

Liu Z Y, Li Z X, Yang Q Y, et al. Differential Modulation and Phase Noise Compensation of CO-OFDMA-PON System[J]. Study on Optical Communications, 2026(1): 240177.
刘紫玥，李正璇，杨勤尧，等. 差分调制及相干OFDMA-PON系统相位噪声补偿[J]. 光通信研究，2026(1): 240177. DOI： 10.13756/j.gtxyj.2026.240177.

Liu Z Y, Li Z X, Yang Q Y, et al. Differential Modulation and Phase Noise Compensation of CO-OFDMA-PON System[J]. Study on Optical Communications, 2026(1): 240177. DOI： 10.13756/j.gtxyj.2026.240177.

摘要

目的

针对多用户的相干光系统上行链路传输场景，文章为提升差分调制在该场景下的可行性，提出了两种改进后的差分方案。

方法

基于16阶差分幅度相移键控（DAPSK）调制能够在准稳态下的正交频分复用（OFDM）传输帧内自动消除相差的特性，文章提出了一种采用不同阶差分相位联合调制的方案，并引入扰码器进一步提升了系统性能。

结果

仿真结果表明，在100 Gbit/s的传输速率下，相比于16DAPSK调制，差分相位联合调制方案和结合扰码器的差分相位联合调制方案分别为系统带来了约2和3 dB的灵敏度提升。

结论

文章所提两种调制方案的误码率（BER）性能优于原始方案，提高了数据传输的可靠性。

Abstract

Objective

Two enhanced differential schemes have been proposed to improve the feasibility of differential modulation in the uplink transmission scenario for multi-user coherent systems.

Methods

Leveraging the inherent capability of 16 Differential Amplitude and Phase Shift Keying (DAPSK) to automatically eliminate phase difference within quasi-steady-state Orthogonal Frequency Division Multiplexing (OFDM) frames

a scheme utilizing different-order differential phase joint modulation is proposed. Further performance enhancements are achieved through the incorporation of a scrambler.

Results

Compared with 16DAPSK modulation

the proposed two modulation schemes bring about 2 and 3 dB sensitivity improvement to the system

respectively.

Conclusion

The Bit Error Rate (BER) performance of both the joint modulation scheme and the joint modulation scheme with scrambler surpasses that of the original one

thereby enhancing the data transmission reliability.

关键词

Keywords

references

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