Article(id=1251457735934558830, tenantId=1146029695717560320, journalId=1251194938327613532, issueId=1251457733048877664, articleNumber=null, orderNo=null, doi=10.14132/j.cnki.1673-5439.2025.05.006, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1741190400000, receivedDateStr=2025-03-06, revisedDate=1748793600000, revisedDateStr=2025-06-02, acceptedDate=null, acceptedDateStr=null, onlineDate=1776300375207, onlineDateStr=2026-04-16, pubDate=null, pubDateStr=null, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1776300375207, onlineIssueDateStr=2026-04-16, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1776300375207, creator=13041195026, updateTime=1776300375207, updator=13041195026, issue=Issue{id=1251457733048877664, tenantId=1146029695717560320, journalId=1251194938327613532, year='2025', volume='45', issue='5', pageStart='1', pageEnd='118', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1776300374519, creator=13041195026, updateTime=1776311882923, updator=13041195026, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1251506002898661500, tenantId=1146029695717560320, journalId=1251194938327613532, issueId=1251457733048877664, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1251506002898661501, tenantId=1146029695717560320, journalId=1251194938327613532, issueId=1251457733048877664, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=50, endPage=56, ext={EN=ArticleExt(id=1251457738140762759, articleId=1251457735934558830, tenantId=1146029695717560320, journalId=1251194938327613532, language=EN, title=Sum rate maximization for RRS-assisted downlink NOMA systems, columnId=1251457734420411100, journalTitle=Journal of Nanjing University of Posts and Telecommunications(Natural Science Edition), columnName=Reconfigurable Intelligent Surface Empowered 6th Generation Broadband Wireless Communication Technology, runingTitle=null, highlight=null, articleAbstract=
Reconfigurable refractive surface (RRS) is regarded as a prospective technology for optimizing signal paths and enhancing directional propagation in complex environments, while non-orthogonal multiple access (NOMA) serves as an empowering technology to meet the high spectrum efficiency and large capacity requirements of the next-generation cellular communications. This paper investigates the problem of maximizing the sum rate of the downlink NOMA system assisted by RRS deployed in the near field of the base station (BS). The sum rate is maximized by alternately optimizing the power distribution and the phase shift matrix of the RRS. The Lagrange dual decomposition method is used to optimize the power allocation and then a phase shift rotation in turn (PSRT) method is proposed to optimize the phase shifts of RRS. Simulation results show that the sum rate of RRS-assisted NOMA systems is higher than that of RRS-assisted orthogonal multiple access (OMA) systems, NOMA systems and OMA systems.
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可重构折射面(Reconfigurable Refractive Surface,RRS)是一种能在复杂环境中优化信号路径和增强定向传播的前瞻性技术,非正交多址接入(Non-Orthogonal Multiple Access,NOMA)则是解决下一代蜂窝通信高频谱效率和高容量需求的使能技术。研究了基于RRS辅助的下行NOMA系统和速率最大化问题,其中RRS位于基站的近场。通过交替优化功率分配和RRS的相移矩阵以最大化系统的和速率。利用拉格朗日对偶分解法优化功率分配,并提出了一种依次旋转相移(Phase Shift Rotation in Turn,PSRT)方法来优化RRS的相移矩阵。仿真结果表明,RRS辅助NOMA系统的和速率高于RRS辅助的正交多址(Orthogonal Multiple Access,OMA)系统、NOMA系统和OMA系统。
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, authorsList=李碧玲, 宋荣方)}, authors=[Author(id=1251457758604771869, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735934558830, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1251457758684463649, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735934558830, authorId=1251457758604771869, language=EN, stringName=Biling LI, firstName=Biling, middleName=null, lastName=LI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=School of Communications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1251457758751572516, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735934558830, authorId=1251457758604771869, language=CN, stringName=李碧玲, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=南京邮电大学 通信与信息工程学院,江苏 南京 210003, bio={"content":"
李碧玲,女,硕士研究生
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李碧玲,女,硕士研究生
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RRS辅助NOMA系统示意图, figureFileSmall=950GpQuebeA3QnVYp9YRDw==, figureFileBig=cedpLLX5vqEACj/JZEuHgg==, tableContent=null), ArticleFig(id=1251457759972115022, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735934558830, language=EN, label=null, caption=null, figureFileSmall=VuYH/Xm8imUcR2JKQTKoPQ==, figureFileBig=+Wcv8Zv2bJggpOcQjAaZvQ==, tableContent=null), ArticleFig(id=1251457760051806801, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735934558830, language=CN, label=图2, caption=
和速率与基站发射功率的关系, figureFileSmall=VuYH/Xm8imUcR2JKQTKoPQ==, figureFileBig=+Wcv8Zv2bJggpOcQjAaZvQ==, tableContent=null), ArticleFig(id=1251457760127304275, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735934558830, language=EN, label=null, caption=null, figureFileSmall=/hqWJSuBeh9vdWwG3p4kTg==, figureFileBig=vFMSiVkNVCoEcIM4O6hQzg==, tableContent=null), ArticleFig(id=1251457760206996054, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735934558830, language=CN, label=图3, caption=
和速率与折射单元数的关系, figureFileSmall=/hqWJSuBeh9vdWwG3p4kTg==, figureFileBig=vFMSiVkNVCoEcIM4O6hQzg==, tableContent=null), ArticleFig(id=1251457760316047960, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735934558830, language=EN, label=null, caption=null, figureFileSmall=MHPaFK3K0/QEICzol1mbbA==, figureFileBig=YaQLYuex08r8ApI7ipjEtA==, tableContent=null), ArticleFig(id=1251457760391545434, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735934558830, language=CN, label=图4, caption=
和速率与用户最低速率要求的关系, figureFileSmall=MHPaFK3K0/QEICzol1mbbA==, figureFileBig=YaQLYuex08r8ApI7ipjEtA==, tableContent=null), ArticleFig(id=1251457760534151773, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735934558830, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 |
|---|
| 馈源数量V | 2 |
| 用户数量L | 3 |
| RRS的覆盖半径Rs/m | 300 |
| 馈源增益α | 2~6 |
| RRS的反射单元数N | 225~525 |
| RRS的振幅β | 0.8 |
| RRS到馈源的距离jv/m | 0.1~0.2 |
| 波长λ/cm | 1.15 |
| Rician因子K1、K2 | [5,3] |
| 噪声功率σ2/dBm | -56 |
| 发射功率P/dBm | -8~8 |
| 分辨率位数B | 3,4 |
| 用户最低速率要求/(bit·s-1·Hz-1) | 2~4 |
), ArticleFig(id=1251457760659980896, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735934558830, language=CN, label=表1, caption=
仿真参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 |
|---|
| 馈源数量V | 2 |
| 用户数量L | 3 |
| RRS的覆盖半径Rs/m | 300 |
| 馈源增益α | 2~6 |
| RRS的反射单元数N | 225~525 |
| RRS的振幅β | 0.8 |
| RRS到馈源的距离jv/m | 0.1~0.2 |
| 波长λ/cm | 1.15 |
| Rician因子K1、K2 | [5,3] |
| 噪声功率σ2/dBm | -56 |
| 发射功率P/dBm | -8~8 |
| 分辨率位数B | 3,4 |
| 用户最低速率要求/(bit·s-1·Hz-1) | 2~4 |
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