Article(id=1251458153519464536, tenantId=1146029695717560320, journalId=1251194880429441115, issueId=1251458153020342360, articleNumber=null, orderNo=null, doi=10.3979/j.issn.1673-825X.202412140311, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1734105600000, receivedDateStr=2024-12-14, revisedDate=1758124800000, revisedDateStr=2025-09-18, acceptedDate=null, acceptedDateStr=null, onlineDate=1776300474767, onlineDateStr=2026-04-16, pubDate=null, pubDateStr=null, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1776300474767, onlineIssueDateStr=2026-04-16, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1776300474767, creator=13041195026, updateTime=1776300474767, updator=13041195026, issue=Issue{id=1251458153020342360, tenantId=1146029695717560320, journalId=1251194880429441115, year='2025', volume='37', issue='5', pageStart='627', pageEnd='780', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1776300474648, creator=13041195026, updateTime=1776311939434, updator=13041195026, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1251506239914586238, tenantId=1146029695717560320, journalId=1251194880429441115, issueId=1251458153020342360, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1251506239914586239, tenantId=1146029695717560320, journalId=1251194880429441115, issueId=1251458153020342360, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=658, endPage=667, ext={EN=ArticleExt(id=1251458153934700636, articleId=1251458153519464536, tenantId=1146029695717560320, journalId=1251194880429441115, language=EN, title=Channel estimation algorithm for IRS-OTFS systems via sparse signal recovery, columnId=1251458153846620250, journalTitle=Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition), columnName=New-Generation Mobile Communication, runingTitle=null, highlight=null, articleAbstract=
This study focuses on the problem of fractional channel parameters affecting channel estimation performance in intelligent reflecting surface-orthogonal time frequency space(IRS-OTFS)communication systems. A channel estimation method for IRS-OTFS systems is proposed by leveraging the sparsity of OTFS channels in the delay-Doppler(DD)domain. First, the joint sparsity channel estimation problem among channel parameters is transformed into a sparse signal recovery problem. Next, the fast iterative shrinkage/thresholding algorithm(FISTA)is introduced to solve this problem. The inputoutput relationship of the IRS-OTFS communication system is then derived. To address the issue of manual parameter tuning in traditional FISTA, a network architecture based on the FISTA algorithm is proposed. This architecture unfolds the iterative process of the sparse signal recovery algorithm into a neural network. The network is designed to automatically learn the optimal hyperparameters and nonlinear functions within the algorithm. Theoretical analysis and simulation results demonstrate that, under the same channel transmission conditions, the proposed algorithm achieves lower estimation error com pared to the benchmark algorithm.
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针对智能反射表面-正交时频空间(intelligent reflecting surface orthogonal time frequency space,IRS-OTFS)通信系统中分数信道参数影响信道估计性能的问题,利用OTFS在延迟-多普勒(delay Doppler,DD)域信道的稀疏性,提出一种IRS-OTFS通信系统信道估计方法。将信道参数之间的联合稀疏性信道估计问题转为稀疏信号恢复问题。引入快速迭代收缩/阈值算法(fast iterative shrinkage thresholding algorithm,FISTA)进行求解,推导了IRS-OTFS通信系统的输入输出关系。提出一个基于FISTA算法的网络架构,将稀疏信号恢复算法的迭代过程展开为神经网络,自动学习算法中的最优超参数和非线性函数,解决传统FISTA需要手动调参的问题。理论分析和仿真结果表明,在信道传输条件相同的情况下,该算法与基准算法相比具有较低的估计误差。
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1三明学院 信息工程学院,福建 三明 365004
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周建萍,博士研究生,主要研究方向为无线通信、语义通信、智能反射表面。E-mail: jianping_zhou2021@163.com。
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周建萍,博士研究生,主要研究方向为无线通信、语义通信、智能反射表面。E-mail: jianping_zhou2021@163.com。
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NMSE comparison of different algorithms under different signal-to-noise ratios, figureFileSmall=EpRMz4JNR1L5c1FrOsMkEQ==, figureFileBig=UINWecTBPGX5Ro4EgXaWEw==, tableContent=null), ArticleFig(id=1251458193143054370, tenantId=1146029695717560320, journalId=1251194880429441115, articleId=1251458153519464536, language=CN, label=图3, caption=
不同信噪比下不同算法的NMSE对比, figureFileSmall=EpRMz4JNR1L5c1FrOsMkEQ==, figureFileBig=UINWecTBPGX5Ro4EgXaWEw==, tableContent=null), ArticleFig(id=1251458193218551843, tenantId=1146029695717560320, journalId=1251194880429441115, articleId=1251458153519464536, language=EN, label=Fig.4, caption=
NMSE comparison of different algorithms under different numbers of antennas, figureFileSmall=MTNDAs94q9hj0tLg6yofUQ==, figureFileBig=LwcjG6KtnjrdNsIBO22cfQ==, tableContent=null), ArticleFig(id=1251458193281466404, tenantId=1146029695717560320, journalId=1251194880429441115, articleId=1251458153519464536, language=CN, label=图4, caption=
不同天线数下不同算法的NMSE对比, figureFileSmall=MTNDAs94q9hj0tLg6yofUQ==, figureFileBig=LwcjG6KtnjrdNsIBO22cfQ==, tableContent=null), ArticleFig(id=1251458193352769573, tenantId=1146029695717560320, journalId=1251194880429441115, articleId=1251458153519464536, language=EN, label=Fig.5, caption=
Comparison of NMSE of different algorithms under different training architectures and SNR, figureFileSmall=WqrRKcUSqwYtkYNFD77WhQ==, figureFileBig=nk7KB7l1K2GnR6LXzM536w==, tableContent=null), ArticleFig(id=1251458193419878438, tenantId=1146029695717560320, journalId=1251194880429441115, articleId=1251458153519464536, language=CN, label=图5, caption=
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Simulation parameter table
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| 参数 | 值 |
|---|
| 载波中心频率/GHz | 28 |
| 子载波间隔/kHz | 15 |
| 子载波数M | 256 |
| 符号数N | 128 |
| 最大多普勒扩展/kHz | 2.6 |
| 最大延迟/s | 2.6×10-6 |
| BS端天线数 | 32 |
| IRS无源反射元件数 | 32 |
| 批大小 | 20 |
| 内循环学习率 | 10-3 |
| 外优化学习率 | 10-4 |
| 卷积层数目 | 16 |
), ArticleFig(id=1251458193566679080, tenantId=1146029695717560320, journalId=1251194880429441115, articleId=1251458153519464536, language=CN, label=表1, caption=
仿真参数表
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| 参数 | 值 |
|---|
| 载波中心频率/GHz | 28 |
| 子载波间隔/kHz | 15 |
| 子载波数M | 256 |
| 符号数N | 128 |
| 最大多普勒扩展/kHz | 2.6 |
| 最大延迟/s | 2.6×10-6 |
| BS端天线数 | 32 |
| IRS无源反射元件数 | 32 |
| 批大小 | 20 |
| 内循环学习率 | 10-3 |
| 外优化学习率 | 10-4 |
| 卷积层数目 | 16 |
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