Tradeoff Maximization Scheme of the IRS-Aided Downlink NOMA Systems

被引：0

作者：

Tian X. ^{[1
]}

Wang K. ^{[1
]}

机构：

[1] Institute of Physics and Electronic Information, Henan Polytechnic University, Jiaozuo

来源：

Beijing Youdian Daxue Xuebao/Journal of Beijing University of Posts and Telecommunications | 2023年 / 46卷 / 05期

关键词：

intelligent reflecting surface; non-orthogonal multiple access; phase shift; power; resource allocation;

D O I：

10.13190/j.jbupt.2022-226

中图分类号：

学科分类号：

摘要：

Aiming at the problem that the signal transmission rate and energy efficiency cannot be taken into account for single cluster downlink non-orthogonal multiple access (NOMA) systems assisted by intelligent reflecting surface (IRS), a resource allocation scheme is proposed to maximize the tradeoff between signal transmission rate and energy efficiency. First, the tradeoff problem between the rate and energy efficiency is formulated, with power of each user and IRS phase shifts as the optimization parameters. Secondly, the optimization problem is simplified, after which the optimization parameters become total power and IRS phase shifts. Then, the IRS phase shifts are solved by maximizing the sum of the equivalent channel gains, and with given IRS phase shifts, the total power that maximizes the rate and energy efficiency tradeoff is found by the function extremum method. Finally, the power of each user is calculated based on the obtained IRS phase shifts and the total power. The simulation results show that the tradeoff of the proposed scheme is higher than that of existing schemes in the same scenario and rate requirement. © 2023 Beijing University of Posts and Telecommunications. All rights reserved.

引用

页码：118 / 124

页数：6

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