Performance enhanced HD-MMIM-OFDM based on geometric shaping

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2024-08-09 DOI:10.1016/j.yofte.2024.103938

Jie Ma , Zhixin Qi , Jia Lu , Jianfei Liu , Nan Jia , Mingming Luo

{"title":"Performance enhanced HD-MMIM-OFDM based on geometric shaping","authors":"Jie Ma , Zhixin Qi , Jia Lu , Jianfei Liu , Nan Jia , Mingming Luo","doi":"10.1016/j.yofte.2024.103938","DOIUrl":null,"url":null,"abstract":"<div><p>A high-dimensional multi-mode index modulation orthogonal frequency division multiplexing (HD-MMIM-OFDM) based on geometric shaping is proposed and demonstrated in cost-effective and power efficient intensity modulation direct detection (IM/DD) systems. Four geometrically shaped three-dimensional (3D-GS) constellation schemes are compared and evaluated in terms of minimum Euclidean distance (MED) and constellation figure of merit (CFM). We select the 3D constellation C3 with the optimal performance as the basis and construct three HD constellation schemes by stacking low-dimensional constellations, namely 4D, 5D, and 6D. To further improve the spectral efficiency (SE) of the system, a multi-mode index modulation (MMIM) based on OFDM is proposed and validated at different fiber lengths. The result shows that compared with traditional 2D-OFDM, the receiver sensitivity of 4D-MMIM-OFDM under the same SE increases by 0.46 dB, and the pseudo-Gray coding scheme further improves the receiver sensitivity by 0.16 dB. When the fiber length increases from 50 km to 80 km, the receiver sensitivity of 6D-MMIM-OFDM increases by 0.97 dB compared to 4D-MMIM-OFDM. It has been demonstrated that as the dimension of the constellation increases, the designed scheme exhibits enhanced tolerance to nonlinearity.</p></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"87 ","pages":"Article 103938"},"PeriodicalIF":2.6000,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optical Fiber Technology","FirstCategoryId":"94","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1068520024002839","RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}

引用次数: 0

Abstract

A high-dimensional multi-mode index modulation orthogonal frequency division multiplexing (HD-MMIM-OFDM) based on geometric shaping is proposed and demonstrated in cost-effective and power efficient intensity modulation direct detection (IM/DD) systems. Four geometrically shaped three-dimensional (3D-GS) constellation schemes are compared and evaluated in terms of minimum Euclidean distance (MED) and constellation figure of merit (CFM). We select the 3D constellation C3 with the optimal performance as the basis and construct three HD constellation schemes by stacking low-dimensional constellations, namely 4D, 5D, and 6D. To further improve the spectral efficiency (SE) of the system, a multi-mode index modulation (MMIM) based on OFDM is proposed and validated at different fiber lengths. The result shows that compared with traditional 2D-OFDM, the receiver sensitivity of 4D-MMIM-OFDM under the same SE increases by 0.46 dB, and the pseudo-Gray coding scheme further improves the receiver sensitivity by 0.16 dB. When the fiber length increases from 50 km to 80 km, the receiver sensitivity of 6D-MMIM-OFDM increases by 0.97 dB compared to 4D-MMIM-OFDM. It has been demonstrated that as the dimension of the constellation increases, the designed scheme exhibits enhanced tolerance to nonlinearity.

查看原文本刊更多论文

基于几何形状的性能增强型 HD-MMIM-OFDM

提出了一种基于几何形状的高维多模式指数调制正交频分复用（HD-MMIM-OFDM），并在经济高效的强度调制直接检测（IM/DD）系统中进行了演示。从最小欧氏距离（MED）和星座优越性（CFM）的角度对四种几何形状三维（3D-GS）星座方案进行了比较和评估。我们选择了性能最佳的三维星座 C3 作为基础，并通过堆叠低维星座构建了三种高清星座方案，即 4D、5D 和 6D。为了进一步提高系统的频谱效率（SE），我们提出了一种基于 OFDM 的多模索引调制（MMIM），并在不同光纤长度下进行了验证。结果表明，与传统的 2D-OFDM 相比，在相同 SE 条件下，4D-MMIM-OFDM 的接收灵敏度提高了 0.46 dB，而伪灰色编码方案则进一步提高了接收灵敏度 0.16 dB。当光纤长度从 50 千米增加到 80 千米时，6D-MMIM-OFDM 的接收灵敏度比 4D-MMIM-OFDM 提高了 0.97 dB。研究表明，随着星座维度的增加，所设计的方案对非线性的耐受性也会增强。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.