重庆邮电大学学报（自然科学版）2023，Vol.35Issue(6)：1038-1046,9.DOI:10.3979/j.issn.1673-825X.202208080209
IRS-OFDMA系统中基于用户QoS的下行资源分配方案
Downlink resource optimization scheme based on user's QoS for IRS-assisted OFDMA system
摘要
Abstract
Aiming to improve the downlink system throughput in intelligent reflecting surface(IRS)assisted orthogonal fre-quency division multiple access(OFDMA),this paper proposes a resource allocation scheme based on user's quality of service(QoS),which jointly optimizes the subcarrier allocation,power allocation and the phase shifts of the IRS.Firstly,with fixed reflection phases,subcarriers are allocated based on a user priority criterion,followed by distributing power a-mong user subcarriers using a water-filling algorithm.Secondly,with fixed subcarrier and power allocation,the phase solu-tion is derived through successive convex approximation.Finally,we obtain the approximate solutions of the subcarrier dis-tribution factor,power distribution coefficient and reflection phase after serval times of alternate optimization,satisfying the requirements of iteration times and convergence accuracy.Simulation results show that compared with other schemes,the proposed scheme can effectively improve OFDMA system throughput and guarantee user's QoS.关键词
智能反射面/正交频分多址/服务质量/资源分配Key words
intelligent reflecting surface/orthogonal frequency division multiple access/quality of service/resource alloca-tion分类
信息技术与安全科学引用本文复制引用
周子恒,朱江..IRS-OFDMA系统中基于用户QoS的下行资源分配方案[J].重庆邮电大学学报（自然科学版）,2023,35(6):1038-1046,9.基金项目
国家自然科学基金项目(61771084)The National Natural Science Foundation of China(61771084) （61771084）
