电子学报2024，Vol.52Issue(12)：3994-4001,8.DOI:10.12263/DZXB.20230837
基于阵列滑窗和波束路由的智能反射面辅助太赫兹通信
Intelligent Reflecting Surface Assisted Terahertz Communications Based on Array Sliding Window and Beam Routing
摘要
Abstract
Considering the system sum rate decrease resulting from inter-user interference in the intelligent reflective surface(IRS)-assisted multi-user terahertz(THz)communications,a scheme combining sliding window and IRS is pro-posed to assist THz communications.Firstly,an array sliding window with an equal number of active users is constructed and connected to each active user in a one-to-one manner.Secondly,the mathematical expressions of the channel and rate provided by the sliding window to its corresponding associated active user are defined based on routing theory to derive the optimal active-passive beamforming and reformulate the beamforming problem into an equivalent graph optimization prob-lem.Finally,given the constraints of the minimum user rate and total base station transmission power,alternating optimiza-tion algorithm is introduced to optimize sliding window parameters and maximize the system sum rate.Simulation results show that in the same channel scenarios,the system sum rate of our proposed scheme is increased by 5 bps/Hz compared to the conventional single IRS-assisted multi-user communications.关键词
智能反射面/滑动窗口/太赫兹/波束形成Key words
intelligent reflecting surface/sliding window/terahertz/beamforming分类
信息技术与安全科学引用本文复制引用
张祖凡,陆坤江,张晨璐..基于阵列滑窗和波束路由的智能反射面辅助太赫兹通信[J].电子学报,2024,52(12):3994-4001,8.基金项目
国家自然科学基金(No.62202077) National Natural Science Foundation of China(No.62202077) （No.62202077）
