电信线路
诺玛
计算机科学
发射机功率输出
单天线干扰消除
水准点(测量)
干扰(通信)
功率(物理)
传输(电信)
缩小
相(物质)
基站
电子工程
计算机网络
电信
发射机
工程类
解码方法
大地测量学
地理
程序设计语言
化学
有机化学
频道(广播)
物理
量子力学
作者
Hong Wang,Haitao Zhao,Zheng Shi,Yaru Fu
标识
DOI:10.1109/lcomm.2023.3277623
摘要
A brand-new framework for cascaded-reconfigurable intelligent surface (RIS) empowered multi-antenna non-orthogonal multiple access (NOMA) system is conceived, wherein RISs are deployed to serve their associated users and assist data transmission for the farther RISs as well. A new concept of RIS-level successive interference cancellation (RSIC) is developed to eliminate the inter-RIS interference. With the devised framework, a transmit power minimization problem is formulated by collaboratively designing each user’s transmit power, the RISs’ phase shifts, and the BS’s equalizers. Specifically, a parallel iteration method is developed to solve the subproblem of jointly optimizing transmit power and equalizers, whereas a sequential phase-rotation algorithm is proposed to address the subproblem of phase shift optimization. It is showed by simulations that the proposed scheme outperforms the existing benchmark schemes in terms of total transmit power.
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