High spectral efficiency SSB-PAM-DD scheme with high linewidth tolerance

Dongxu LU; Xian ZHOU; Fei LIU; Jiahao HUO; Jinhui YUAN; Keping LONG

doi:10.11959/j.issn.1000-436x.2022100

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High spectral efficiency SSB-PAM-DD scheme with high linewidth tolerance

Papers | 更新时间：2024-06-05

- High spectral efficiency SSB-PAM-DD scheme with high linewidth tolerance
- Journal on Communications Vol. 43, Issue 5, Pages: 36-44(2022)
- 作者机构：
  
  1. 北京科技大学计算机与通信工程学院，北京 100083
  2. 北京科技大学顺德研究生院，广东佛山 528300
- 作者简介：
- 基金信息：
  
  The National Key Research and Development Program of China(2019YFB1803905);The National Natural Science Foundation of China(61871030);The National Natural Science Foundation of China(62171022);Guangdong Basic and Applied Basic Research Foundation(2021B1515120057);Beijing Natural Science Foundation(4222009);The Scientific and Technological Innovation Foundation of Shunde Graduate School, USTB(BK19AF005)
- DOI：10.11959/j.issn.1000-436x.2022100
  CLC： TN913
- Online First：2022-05，
  
  Published：25 May 2022
- 稿件说明：
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Dongxu LU, Xian ZHOU, Fei LIU, et al. High spectral efficiency SSB-PAM-DD scheme with high linewidth tolerance[J]. Journal on Communications, 2022, 43(5): 36-44.
DOI：

Dongxu LU, Xian ZHOU, Fei LIU, et al. High spectral efficiency SSB-PAM-DD scheme with high linewidth tolerance[J]. Journal on Communications, 2022, 43(5): 36-44. DOI： 10.11959/j.issn.1000-436x.2022100.

摘要

针对低成本下的高色散（CD）稳健性单边带（SSB）直接检测（DD），对3种单边带脉冲幅度调制方案进行了分析，其中在发射端加入下变频的方案可获得最大频谱利用率，但恶化了系统对激光器线宽的容忍度。鉴于此，根据单边带脉冲幅度调制信号的特性，提出了一种包含相位损伤免疫均衡算法和改进盲相位补偿算法的数字信号处理方案。仿真结果表明，针对112 Gbit/s的单边带脉冲幅度直接检测，无论是背靠背还是传纤80 km场景，在同一误码率阈值下改进方案可容忍线宽为1 MHz，而原始方案仅为100 kHz，实现了高谱效、高线宽容忍度的低成本单边带脉冲幅度调制信号传输。

Abstract

For low-cost and high chromatic dispersion (CD) robustness single sideband (SSB) with direct detection (DD)

three schemes of SSB with pulse amplitude modulation (PAM) were investigated.Among that

the highest spectral efficiency was achieved by the scheme of adding the frequency down-conversion at the transmitter.However

that scheme reduces the tolerance for laser linewidth.Hence

based on the character of the SSB-PAM signal

a DSP scheme was proposed

including a modified equalization algorithm with phase distortion immunity and blind phase search algorithm.The simulation results show that the modified scheme can tolerate 1 MHz linewidth for 112 Gbit/s SSB-PAM-DD

while the original scheme for SSB-PAM was only 100 kHz at the same bit error rate (BER) threshold.Therefore

the proposed scheme can achieve a high frequency efficiency

high linewidth tolerance

and low-cost SSB-PAM signaling transmission.

关键词

Keywords

references

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