Performance-enhanced orthogonal time frequency space system based on probabilistic shaping

IF 2.5 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-09-26 DOI:10.1016/j.optcom.2025.132498

Yanyi Wang , Heng Lin , Yingxiong Song , Jianjun Yu

{"title":"Performance-enhanced orthogonal time frequency space system based on probabilistic shaping","authors":"Yanyi Wang , Heng Lin , Yingxiong Song , Jianjun Yu","doi":"10.1016/j.optcom.2025.132498","DOIUrl":null,"url":null,"abstract":"<div><div>In this paper, a probabilistically shaped orthogonal time frequency space (PS-OTFS) modulation is proposed and experimentally demonstrated in a photonics-assisted millimeter-wave system. The probabilistic amplitude shaping (PAS) architecture is employed to generate PS quadrature amplitude modulation (PS-QAM) symbols, which are subsequently mapped into the delay-Doppler (DD) domain for OTFS modulation. At the receiver, pilot-assisted channel estimation is utilized to estimate the channel, and a message passing (MP) detector is adopted for symbol detection. Under the condition of a normalized generalized mutual information (NGMI) threshold of 0.92, the experimental results show that PS-16QAM achieves a 0.3 dB improvement in receiver sensitivity compared to uniform 16QAM, while PS-64QAM achieves a 0.5 dB improvement over uniform 64QAM. Furthermore, a net rate of 13.82 Gbit/s is achieved in the experiment over a 0.8-meter wireless link under delay and Doppler spread channels, demonstrating the potential of the proposed system for future 6G wireless communication networks.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"596 ","pages":"Article 132498"},"PeriodicalIF":2.5000,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics Communications","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0030401825010260","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}

引用次数: 0

Abstract

In this paper, a probabilistically shaped orthogonal time frequency space (PS-OTFS) modulation is proposed and experimentally demonstrated in a photonics-assisted millimeter-wave system. The probabilistic amplitude shaping (PAS) architecture is employed to generate PS quadrature amplitude modulation (PS-QAM) symbols, which are subsequently mapped into the delay-Doppler (DD) domain for OTFS modulation. At the receiver, pilot-assisted channel estimation is utilized to estimate the channel, and a message passing (MP) detector is adopted for symbol detection. Under the condition of a normalized generalized mutual information (NGMI) threshold of 0.92, the experimental results show that PS-16QAM achieves a 0.3 dB improvement in receiver sensitivity compared to uniform 16QAM, while PS-64QAM achieves a 0.5 dB improvement over uniform 64QAM. Furthermore, a net rate of 13.82 Gbit/s is achieved in the experiment over a 0.8-meter wireless link under delay and Doppler spread channels, demonstrating the potential of the proposed system for future 6G wireless communication networks.

查看原文本刊更多论文

基于概率整形的性能增强正交时频空间系统

本文提出了一种概率形正交时频空间（PS-OTFS）调制方法，并在光子辅助毫米波系统中进行了实验验证。采用概率幅度整形（PAS）架构生成PS正交幅度调制（PS- qam）符号，然后将其映射到延迟多普勒（DD）域进行OTFS调制。在接收端，采用导频辅助信道估计估计信道，采用消息传递检测器进行符号检测。在归一化广义互信息（NGMI）阈值为0.92的条件下，实验结果表明，PS-16QAM比均匀16QAM的接收机灵敏度提高了0.3 dB， PS-64QAM比均匀64QAM的接收机灵敏度提高了0.5 dB。此外，在延迟和多普勒传播信道下，实验在0.8米无线链路上实现了13.82 Gbit/s的净速率，证明了该系统在未来6G无线通信网络中的潜力。

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

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.