可重构智能表面辅助多用户NOMA网络鲁棒资源分配
Robust Resource Allocation for Reconfigurable Intelligent Surface-Assisted Multi-User NOMA Networks
查看参考文献22篇
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文摘
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在不完美信道状态信息(Channel State Information,CSI)和不完美串行干扰消除(Successive Interference Cancellation,SIC)的场景下,研究了可重构智能表面(Reconfigurable Intelligent Surface,RIS)辅助多用户非正交多址接入(Non-Orthogonal Multiple Access,NOMA)网络的鲁棒资源分配问题.在考虑两类用户(信息用户和能量用户)服务质量(Quality of Service,QoS)和信息用户SIC约束下,建立了基站发射功率最小化的优化问题.该问题是一个多变量耦合的非凸优化问题.为了求解该问题,本文使用松弛变量、线性近似、S-程序、符号定性法转化该问题的非凸约束.然后将优化问题分解为两个子问题,最后使用交替优化方法迭代求解两个子问题,直到发送功率收敛.仿真结果表明:该文算法具有较好的收敛性,实现了资源的鲁棒分配,同时有效地降低基站发射功率. |
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其他语种文摘
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In the scenario of imperfect channel state information (CSI) and imperfect successive interference cancellation (SIC), the problem of robust resource allocation in reconfigurable intelligent surface (RIS) assisted multi-user non-orthogonal multiple access (NOMA) is studied. Considering the constraints of two types of users (information user and energy user) quality of service (QoS) and information user SIC, a transmit power minimization problem is formulated. This optimization problem is a multi-variable coupled non-convex optimization problem. In this paper, the non-convex constraints of the problem are transformed by using relaxation variables, linear approximation, S-procedure, and sign-definiteness methods. Then, the optimization problem is decomposed into two sub-problems, Finally, the alternate optimization method is used to iteratively solve the above sub-problems. The simulation results show that the proposed approach has a good convergence behavior, realizes the robust allocation of resources and can effectively reduce the transmit power of the base station. |
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来源
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电子学报
,2024,52(10):3359-3367 【核心库】
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DOI
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10.12263/DZXB.20240456
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关键词
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可重构智能表面
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非正交多址接入
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不完美信道状态信息
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不完美串行干扰消除
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传输功率优化
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功率最小化
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地址
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1.
重庆邮电大学通信与信息工程学院, 重庆, 400065
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重庆邮电大学, 移动通信技术重庆市重点实验室, 重庆, 400065
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0372-2112 |
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学科
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电子技术、通信技术 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:7849325
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