Article(id=1251457735129252453, tenantId=1146029695717560320, journalId=1251194938327613532, issueId=1251457733048877664, articleNumber=null, orderNo=null, doi=10.14132/j.cnki.1673-5439.2025.05.004, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1731859200000, receivedDateStr=2024-11-18, revisedDate=1734278400000, revisedDateStr=2024-12-16, acceptedDate=null, acceptedDateStr=null, onlineDate=1776300375014, onlineDateStr=2026-04-16, pubDate=null, pubDateStr=null, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1776300375014, onlineIssueDateStr=2026-04-16, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1776300375014, creator=13041195026, updateTime=1776300375014, 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=31, endPage=41, ext={EN=ArticleExt(id=1251457735494156904, articleId=1251457735129252453, tenantId=1146029695717560320, journalId=1251194938327613532, language=EN, title=Sum-rate optimization for RIS-aided cell-free uplink communication systems with RSMA, 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=
To address the challenges of environmental sensitivity in communication links and limited terminal access in cell-free communication systems, this paper introduces reconfigurable intelligent surface (RIS) and rate splitting multiple access (RSMA) technologies to assist communication. A sum-rate optimization algorithm is proposed for RIS-aided cell-free uplink communication systems with RSMA. The algorithm aims to maximize the system sum-rate by jointly optimizing RIS passive beamforming, access point selection, power allocation of sub-messages, and decoding order. Given the non-convex nature of this discrete nonlinear programming problem, we decompose it into multiple subproblems and address them by alternatively using an optimization approach. First, a user-centric matching algorithm based on channel gain is used to obtain the optimal matching scheme. Second, the successive convex approximation (SCA) algorithm is used to solve the sub-message power distribution problem, and the Riemann conjugate gradient algorithm is utilized to solve the RIS passive beamforming problem. Third, a decoding order algorithm is developed based on channel gain and the sub-message allocation ratio. Simulation results demonstrate that the proposed algorithm achieves superior sum-rate performance compared to traditional algorithms.
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针对无蜂窝系统中通信链路易受环境影响、终端接入设备受限的问题,引入智能反射面(Reconfigurable Intelligent Surface,RIS)和速率分割多址(Rate Splitting Multiple Access,RSMA)技术辅助通信,提出了一种基于RIS辅助的RSMA无蜂窝上行通信系统和速率优化算法,通过联合优化RIS的无源波束形成、接入点选择、子消息功率分配和解码顺序,以实现系统和速率最大化。由于该优化问题为非凸的离散非线性规划,考虑将其解耦成多个子问题进行交替优化,首先采用基于信道增益的以用户为中心的匹配算法获取最优匹配方案,接着采用连续凸近似(Successive Convex Approximation,SCA)算法解决子消息的功率分配问题,通过黎曼共轭梯度法优化RIS的无源波束形成,然后提出一种基于信道增益以及用户子消息分配比例的解码顺序算法。仿真结果表明,与传统算法相比,所提算法具有更优的和速率。
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基于RIS辅助的RSMA无蜂窝上行通信系统模型图, figureFileSmall=pNpZf37l2NVR2RXZfst2ww==, figureFileBig=86mfNuhiMUBV4hoSp/ZnNw==, tableContent=null), ArticleFig(id=1251457756323070390, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=EN, label=null, caption=null, figureFileSmall=Fk5ea2+PjtXjNnQQC+QCFA==, figureFileBig=t3hm+h79GY6YEAFAetovLw==, tableContent=null), ArticleFig(id=1251457756440510907, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=CN, label=图2, caption=
基于SCA的子消息功率分配迭代图, figureFileSmall=Fk5ea2+PjtXjNnQQC+QCFA==, figureFileBig=t3hm+h79GY6YEAFAetovLw==, tableContent=null), ArticleFig(id=1251457756520202688, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=EN, label=null, caption=null, figureFileSmall=BNzEdJc6hMEzPWpK80IQcg==, figureFileBig=RpTc2/PT29MbBe9wSxja/Q==, tableContent=null), ArticleFig(id=1251457756608283075, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=CN, label=图3, caption=
基于黎曼流形梯度法的RIS相移迭代图, figureFileSmall=BNzEdJc6hMEzPWpK80IQcg==, figureFileBig=RpTc2/PT29MbBe9wSxja/Q==, tableContent=null), ArticleFig(id=1251457756683780551, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=EN, label=null, caption=null, figureFileSmall=2XZACsoSTdsymNA7b2Q49w==, figureFileBig=CvpxnLYaHW28+KZ5Ynt2kQ==, tableContent=null), ArticleFig(id=1251457756776055244, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=CN, label=图4, caption=
基于交替迭代算法的整体求解迭代图, figureFileSmall=2XZACsoSTdsymNA7b2Q49w==, figureFileBig=CvpxnLYaHW28+KZ5Ynt2kQ==, tableContent=null), ArticleFig(id=1251457756843164111, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=EN, label=null, caption=null, figureFileSmall=pnBO70FO9BkLa+ktEID+6A==, figureFileBig=c1/wWyECpCaM4u9O7ugb7Q==, tableContent=null), ArticleFig(id=1251457756931244501, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=CN, label=图5, caption=
和速率与UE最大发射功率Pmax关系图, figureFileSmall=pnBO70FO9BkLa+ktEID+6A==, figureFileBig=c1/wWyECpCaM4u9O7ugb7Q==, tableContent=null), ArticleFig(id=1251457757006741976, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=EN, label=null, caption=null, figureFileSmall=zziVIeAZoVUw4qqu6iIwKA==, figureFileBig=NokJ97evaEbv0ffpWm/Edg==, tableContent=null), ArticleFig(id=1251457757082239452, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=CN, label=图6, caption=
和速率与RIS发射单元数的关系图, figureFileSmall=zziVIeAZoVUw4qqu6iIwKA==, figureFileBig=NokJ97evaEbv0ffpWm/Edg==, tableContent=null), ArticleFig(id=1251457757174514144, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=EN, label=null, caption=null, figureFileSmall=uwApg4rAwM97WHvuMpOlnQ==, figureFileBig=PO5ih0K4voNavHa4tsEcNw==, tableContent=null), ArticleFig(id=1251457757241623011, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=CN, label=图7, caption=
和速率与用户子消息数关系图, figureFileSmall=uwApg4rAwM97WHvuMpOlnQ==, figureFileBig=PO5ih0K4voNavHa4tsEcNw==, tableContent=null), ArticleFig(id=1251457757342286310, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=EN, label=null, caption=null, figureFileSmall=BXdV59jtP2wJBcBJ3oDEJw==, figureFileBig=+efZF7U8McC6sDYjUin5kw==, tableContent=null), ArticleFig(id=1251457757430366699, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=CN, label=图8, caption=
和速率与子消息解码顺序关系图, figureFileSmall=BXdV59jtP2wJBcBJ3oDEJw==, figureFileBig=+efZF7U8McC6sDYjUin5kw==, tableContent=null), ArticleFig(id=1251457757514252784, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=EN, label=null, caption=null, figureFileSmall=sC3xq589qxxSIAkP6EnA1A==, figureFileBig=dUIRE6C0jT/LfBbYfVVQ0w==, tableContent=null), ArticleFig(id=1251457757635887605, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=CN, label=图9, caption=
非完美CSI条件下性能对比图, figureFileSmall=sC3xq589qxxSIAkP6EnA1A==, figureFileBig=dUIRE6C0jT/LfBbYfVVQ0w==, tableContent=null), ArticleFig(id=1251457757719773689, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 解码方案 | 信道增益 | 比例指数 | 描述 |
|---|
| ζ1 | 上升 | 上升 | ζ11 < ζ12 <…< ζ1K<…< ζK1 < ζK2 <…< ζKK |
| ζ2 | 上升 | 下降 | ζK1 < ζK2 <…< ζKK<…< ζ11 < ζ12 <…< ζ1K |
| ζ3 | 下降 | 上升 | ζ1K<…< ζ12 < ζ11 <…< ζKK<…< ζK2 < ζK1 |
| ζ4 | 下降 | 下降 | ζKK<…< ζK2 < ζK1 <…< ζ1K<…< ζ12 < ζ1K |
), ArticleFig(id=1251457757828825598, tenantId=1146029695717560320, journalId=1251194938327613532, articleId=1251457735129252453, language=CN, label=表1, caption=
四种解码方案说明
, figureFileSmall=null, figureFileBig=null, tableContent=
| 解码方案 | 信道增益 | 比例指数 | 描述 |
|---|
| ζ1 | 上升 | 上升 | ζ11 < ζ12 <…< ζ1K<…< ζK1 < ζK2 <…< ζKK |
| ζ2 | 上升 | 下降 | ζK1 < ζK2 <…< ζKK<…< ζ11 < ζ12 <…< ζ1K |
| ζ3 | 下降 | 上升 | ζ1K<…< ζ12 < ζ11 <…< ζKK<…< ζK2 < ζK1 |
| ζ4 | 下降 | 下降 | ζKK<…< ζK2 < ζK1 <…< ζ1K<…< ζ12 < ζ1K |
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