智能反射面辅助的无线网络加权和速率优化设计
TN92; 针对智能反射面(intelligent reflecting surface,IRS)辅助的无线网络传输设计的目标是通过联合设计基站处的发送波束形成向量和IRS的反射系数,在满足基站发射功率和IRS单位模约束的条件下,使多个地面用户的加权和速率最大化.为了求解非凸的目标函数,提出一种交替优化方法,其中采用黎曼流形梯度(Riemannian manifold gradient,RMG)方法来优化反射系数,使用二分搜索法优化发送波束形成向量.此外,为了降低RMG方法的复杂度,设计了一种智能元素块坐标下降方法.仿真结果验证了所提算法的有效性,并且表明通过优化设计反射系数,IRS可显著提高...
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| Published in | 国防科技大学学报 Vol. 45; no. 6; pp. 56 - 63 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
国防科技大学电子对抗学院,安徽合肥 230037
01.12.2023
国防科技大学电子制约技术安徽省重点实验室,安徽合肥 230037 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-2486 |
| DOI | 10.11887/j.cn.202306008 |
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| Abstract | TN92; 针对智能反射面(intelligent reflecting surface,IRS)辅助的无线网络传输设计的目标是通过联合设计基站处的发送波束形成向量和IRS的反射系数,在满足基站发射功率和IRS单位模约束的条件下,使多个地面用户的加权和速率最大化.为了求解非凸的目标函数,提出一种交替优化方法,其中采用黎曼流形梯度(Riemannian manifold gradient,RMG)方法来优化反射系数,使用二分搜索法优化发送波束形成向量.此外,为了降低RMG方法的复杂度,设计了一种智能元素块坐标下降方法.仿真结果验证了所提算法的有效性,并且表明通过优化设计反射系数,IRS可显著提高无线网络的频谱效率. |
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| AbstractList | TN92; 针对智能反射面(intelligent reflecting surface,IRS)辅助的无线网络传输设计的目标是通过联合设计基站处的发送波束形成向量和IRS的反射系数,在满足基站发射功率和IRS单位模约束的条件下,使多个地面用户的加权和速率最大化.为了求解非凸的目标函数,提出一种交替优化方法,其中采用黎曼流形梯度(Riemannian manifold gradient,RMG)方法来优化反射系数,使用二分搜索法优化发送波束形成向量.此外,为了降低RMG方法的复杂度,设计了一种智能元素块坐标下降方法.仿真结果验证了所提算法的有效性,并且表明通过优化设计反射系数,IRS可显著提高无线网络的频谱效率. |
| Abstract_FL | For the transmission design problem in an IRS(intelligent reflecting surface)-enabled network,by jointly designing the transmit beamforming and IRS reflecting coefficient,the goal of this paper was to maximize the weighted sum rate for multiply ground users,subject to the transmit power and the unit modulus constraint.To solve the non-convex objective,we developed an alternating optimization method,where the phase shifter optimization was solved by the RMG(Riemannian manifold gradient)method,and the beamforming was obtained by the bisection search method.Furthermore,an element-wise block coordinate descent-based method was proposed to reduce the complexity of the RMG method.Simulation results verify the effectiveness of the proposed algorithm,and demonstrate that IRS can significantly improve the spectrum efficiency,when the reflecting coefficients are properly optimized. |
| Author | 王磊 王勇 赵青松 林志 牛和昊 |
| AuthorAffiliation | 国防科技大学电子对抗学院,安徽合肥 230037;国防科技大学电子制约技术安徽省重点实验室,安徽合肥 230037 |
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| Author_FL | NIU Hehao ZHAO Qingsong LIN Zhi WANG Yong WANG Lei |
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| DOI | 10.11887/j.cn.202306008 |
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| DocumentTitle_FL | Weighted sum rate optimization for intelligent reflecting surface-aided wireless network |
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| Keywords | 智能元素块坐标下降方法 intelligent reflecting surface 智能反射面 Riemannian manifold gradient algorithm weighted sum rate optimization 加权和速率优化 黎曼流形梯度算法 element-wise block coordinate descent method |
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| Snippet | TN92; 针对智能反射面(intelligent reflecting surface,IRS)辅助的无线网络传输设计的目标是通过联合设计基站处的发送波束形成向量和IRS的反射系数,在满足基站发射功率... |
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| Title | 智能反射面辅助的无线网络加权和速率优化设计 |
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