RIS辅助太赫兹频段车载网络容量优化

TN92; 为缓解当前无线系统的频谱稀缺和容量限制,引入太赫兹频段并以可重构智能反射面(RIS)进行辅助通信构建一个下行链路车载网络.考虑系统总功率有限约束、蜂窝移动用户服务质量约束、车辆和用户位置随机性约束,以最大化车辆用户总速率建立最优功率分配和RIS最佳部署的混合优化模型.基于平衡法、线性变换法和消元法将原NP-hard问题转化为具有复相关约束多变量耦合的凸优化问题,内层迭代基于拉格朗日乘子法求解最优功率分配,外层迭代基于改进式遗传算法求解RIS最佳部署.仿真结果表明,基于最优功率分配下合理部署RIS节点个数与分布密度能在获得较高目标总容量的同时节约成本....

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Published in通信学报 Vol. 44; no. 10; pp. 103 - 111
Main Authors 陈发堂, 刘小玲, 王丹, 张若凡
Format Journal Article
LanguageChinese
Published 重庆邮电大学通信与信息工程学院,重庆 400065 2023
Subjects
IoV
可重构智能反射面
功率分配
terahertz
太赫兹
车联网
power distribution
RIS
Online AccessGet full text
ISSN1000-436X
DOI10.11959/j.issn.1000-436x.2023176

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Abstract TN92; 为缓解当前无线系统的频谱稀缺和容量限制,引入太赫兹频段并以可重构智能反射面(RIS)进行辅助通信构建一个下行链路车载网络.考虑系统总功率有限约束、蜂窝移动用户服务质量约束、车辆和用户位置随机性约束,以最大化车辆用户总速率建立最优功率分配和RIS最佳部署的混合优化模型.基于平衡法、线性变换法和消元法将原NP-hard问题转化为具有复相关约束多变量耦合的凸优化问题,内层迭代基于拉格朗日乘子法求解最优功率分配,外层迭代基于改进式遗传算法求解RIS最佳部署.仿真结果表明,基于最优功率分配下合理部署RIS节点个数与分布密度能在获得较高目标总容量的同时节约成本.
AbstractList TN92; 为缓解当前无线系统的频谱稀缺和容量限制,引入太赫兹频段并以可重构智能反射面(RIS)进行辅助通信构建一个下行链路车载网络.考虑系统总功率有限约束、蜂窝移动用户服务质量约束、车辆和用户位置随机性约束,以最大化车辆用户总速率建立最优功率分配和RIS最佳部署的混合优化模型.基于平衡法、线性变换法和消元法将原NP-hard问题转化为具有复相关约束多变量耦合的凸优化问题,内层迭代基于拉格朗日乘子法求解最优功率分配,外层迭代基于改进式遗传算法求解RIS最佳部署.仿真结果表明,基于最优功率分配下合理部署RIS节点个数与分布密度能在获得较高目标总容量的同时节约成本.
Author 王丹
张若凡
刘小玲
陈发堂
AuthorAffiliation 重庆邮电大学通信与信息工程学院,重庆 400065
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ZHANG Ruofan
LIU Xiaoling
CHEN Fatang
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可重构智能反射面
功率分配
terahertz
太赫兹
车联网
power distribution
RIS
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Title RIS辅助太赫兹频段车载网络容量优化
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