Joint Power and Discrete Amplitude Allocation for STAR-RIS-Aided NOMA System

被引:21
作者
Yang, Shizhao [1 ]
Zhang, Jun [1 ]
Xia, Wenchao [1 ]
Gao, Hui [2 ]
Zhu, Hongbo [1 ]
机构
[1] Nanjing Univ Posts & Telecommun, Jiangsu Key Lab Wireless Commun, Nanjing 210003, Peoples R China
[2] Beijing Univ Posts & Telecommun, Key Lab Trustworthy Distributed Comp & Serv, Minist Educ, Beijing 100876, Peoples R China
基金
中国国家自然科学基金;
关键词
NOMA; outage probability; STAR-RIS;
D O I
10.1109/TVT.2022.3195815
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper studies a simultaneously transmitting and reflecting reconfigurable intelligent surface aided non-orthogonal multiple access system with two paired users. To ensure the quality of service requirement of the reflected user, we propose a joint power and discrete amplitude allocation scheme, which can reduce channel estimation workload and hardware complexity. To characterize the performance of our proposed scheme, a novel channel statistic over Nagakami-$m$ fading is derived by adopting Beaulieu series. Subsequently, closed-from expressions for outage probability and diversity order of the reflected user are obtained, respectively. Moreover, owing to the complex channel statistic of the transmitted user, we analyze a lower bound of outage probability for the transmitted user. Finally, numerical results confirm that our proposed scheme greatly improves the performance of the reflected user and yields a larger throughput in comparison with the existing work.
引用
收藏
页码:13382 / 13386
页数:5
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