Asymmetric clipped optical OFDM adaptive indexing modulation scheme under turbulent channels

WANG Huiqin; PEI Yanhao; WANG Zhen; TANG Qihan; RU Hui; ZHANG Hongyan

doi:10.11959/j.issn.1000-436x.2024200

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Asymmetric clipped optical OFDM adaptive indexing modulation scheme under turbulent channels

Papers | 更新时间：2024-12-24

- Asymmetric clipped optical OFDM adaptive indexing modulation scheme under turbulent channels
- Journal on Communications Vol. 45, Issue 11, Pages: 174-183(2024)
- 作者机构：
  
  兰州理工大学计算机与通信学院，甘肃兰州 730050
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(62261033;62265010);Gansu Provincial Key Research and Development Program(22JR5RA278)
- DOI：10.11959/j.issn.1000-436x.2024200
  CLC： TN929.12
- Received：02 September 2024，
  
  Revised：2024-11-06，
  
  Published：25 November 2024
- 稿件说明：
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王惠琴,裴岩浩,王真等.湍流信道下非对称限幅光OFDM自适应索引调制方案[J].通信学报,2024,45(11):174-183.

WANG Huiqin,PEI Yanhao,WANG Zhen,et al.Asymmetric clipped optical OFDM adaptive indexing modulation scheme under turbulent channels[J].Journal on Communications,2024,45(11):174-183.
王惠琴,裴岩浩,王真等.湍流信道下非对称限幅光OFDM自适应索引调制方案[J].通信学报,2024,45(11):174-183. DOI： 10.11959/j.issn.1000-436x.2024200.

WANG Huiqin,PEI Yanhao,WANG Zhen,et al.Asymmetric clipped optical OFDM adaptive indexing modulation scheme under turbulent channels[J].Journal on Communications,2024,45(11):174-183. DOI： 10.11959/j.issn.1000-436x.2024200.

摘要

针对现有光正交频分复用（OFDM）索引调制技术难以适应信道变化，导致系统传输速率受限的问题，构建了一个以最大化传输速率为目标的阈值优化模型。通过动态地寻找最佳M-QAM调制切换阈值，提出一种光OFDM自适应索引调制方案。在详细介绍信号的映射原理后，推导出所提方案在不同湍流强度下的最佳阈值和理论误码率。仿真结果表明，与传统光OFDM索引调制方案相比，所提方案在满足目标误码率的前提下，显著提升了系统的传输速率。

Abstract

Given the issue that existing optical orthogonal frequency division multiplexing (OFDM) with index modulation (OOFDM-IM) struggle to adapt to channel variations

which results in limitations on transmission rate. A threshold optimization model aimed at maximizing transmission rate was constructed. By dynamically identifying the optimal M-QAM modulation switching threshold

an optical OFDM adaptive indexing modulation scheme was proposed. After a detailed introduction to the mapping principle of the signal

the optimal threshold and theoretical bit error rate under different turbulence intensities were derived. The simulation results show that compared with traditional OOFDM-IM schemes

the proposed scheme significantly enhances transmission rate while satisfying the target bit error rate.

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Keywords

references

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