波束赋形
预编码
计算机科学
信道状态信息
接头(建筑物)
遍历理论
频道(广播)
传输(电信)
计算复杂性理论
算法
上下界
数学优化
无线
计算机网络
数学
多输入多输出
电信
工程类
数学分析
建筑工程
作者
Peibo Han,Zheng–Yi Zhou,Lajos Hanzo
标识
DOI:10.1109/lcomm.2021.3093362
摘要
In this letter, the joint design of user association (UA) and passive beamforming (PBF) has been investigated for heterogeneous networks equipped with reconfigurable intelligent surfaces. Firstly, a closed-form lower bound of ergodic rate is derived using statistical channel state information and adopting the maximum ratio transmission precoding. After that, a joint UA and PBF problem is formulated to maximize the weighted sum-rate (WSR), which is then decomposed into UA and PBF subproblems and solved by our proposed priority-based swapping and fixed-point iteration algorithms. Simulation results demonstrate that our proposed scheme achieves significant WSR performance gain when compared to the state-of-the-art methods.
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