智能反射面辅助的STBC-NOMA系统性能分析
Performance Analysis on Intelligent Reflecting Surfaces Assisted STBC-NOMA Systems
- 电子学报 2023年51卷第8期 页码：2058-2066
- 作者机构：
太原科技大学电子信息工程学院，山西太原 030024
- 作者简介：
[ "李素月 女，1980年生，河南周口人.2013年于上海交通大学获博士学位.太原科技大学教授.研究方向为5G和6G通信系统信号处理、智能反射面、NOMA技术、UAV技术、全双工FD技术等.E-mail: lsy@ tyust.edu.cn" ]
孟凡一 男，1996年生，山东济宁人.太原科技大学硕士研究生毕业.主要研究方向为空时分组码、NOMA和智能反射面技术.E-mail: 768122631@qq.com
王安红 女，1972年生，山西闻喜人.2009年于北京交通大学获博士学位.太原科技大学教授.主要研究方向为图像视频编码与传输、深度学习、3D点云等.E-mail: ahwang@tyust.edu.cn
- 基金信息：国家自然科学基金(61501315;62072325);山西省基础研究计划面上项目(20210302123205);山西省回国留学人员科研资助项目(2022-162);校级研究生创新项目(SY2022024)
DOI：10.12263/DZXB.20220410
中图分类号： TN911.1;收稿：2022-04-15，
修回：2022-10-20，
纸质出版：2023-08-25
- 稿件说明：
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李素月,孟凡一,王安红.智能反射面辅助的STBC-NOMA系统性能分析[J].电子学报,2023,51(08):2058-2066.
LI Su-yue,MENG Fan-yi,WANG An-hong.Performance Analysis on Intelligent Reflecting Surfaces Assisted STBC-NOMA Systems[J].ACTA ELECTRONICA SINICA,2023,51(08):2058-2066.
李素月,孟凡一,王安红.智能反射面辅助的STBC-NOMA系统性能分析[J].电子学报,2023,51(08):2058-2066. DOI： 10.12263/DZXB.20220410.
LI Su-yue,MENG Fan-yi,WANG An-hong.Performance Analysis on Intelligent Reflecting Surfaces Assisted STBC-NOMA Systems[J].ACTA ELECTRONICA SINICA,2023,51(08):2058-2066. DOI： 10.12263/DZXB.20220410.
摘要
智能反射面（Intelligent Reflecting Surface，IRS）技术以其低成本、灵活部署、易于融合其他关键技术的优势吸引了无线通信学术界和工业界的极大关注.传统的空时分组码（Space-Time Block Coding，STBC）与非正交多址接入（Non-Orthogonal Multiple Access，NOMA）方案的巧妙结合（STBC-NOMA）已被证明能够有效地提高系统的鲁棒性和吞吐量.鉴于此，本文提出一种新的IRS辅助的STBC-NOMA系统的传输框架（IRS-STBC-NOMA）.IRS辅助系统给远近不同的两个用户传输信号.采用两个分割的IRS实现STBC传输并利用IRS的相移设计实现发射信号控制，分别推导了所提出传输框架下每个用户的中断概率和遍历速率的闭合表达式；基于所得的分析表达式，给出了渐近或单调的理论分析，之后通过蒙特卡洛仿真进行了对比验证.与现有的STBC-NOMA方案相比，所提IRS-STBC-NOMA方案的中断性能和遍历速率均获得显著提升.
Abstract
Intelligent reflecting surface (IRS) technology has attracted a great deal of attention from both academia and industry in wireless communications for its low cost
flexible deployment
and ease of integration with other key technologies. An ingenious combination of traditional space-time block coding (STBC) and non-orthogonal multiple access (NOMA) schemes (STBC-NOMA) has been proven to be effective in improving system robustness and throughput. In view of this
this paper proposes a novel transmission framework for IRS-assisted STBC-NOMA system
named IRS-STBC-NOMA
which transmits signals to two users with different distances with the assistance of IRS. We consider two segmented IRSs for STBC transmission and utilize the phase shift design of IRS to control transmit signals. We derive the outage probability and ergodic rate for each user under the proposed transmission framework
respectively. Based on the obtained analytical expressions
an asymptotic or monotonic theoretical analysis is offered
followed by a comparative verification through Monte Carlo simulations. Compared with the existing STBC-NOMA scheme
the proposed IRS-STBC-NOMA scheme achieves significant improvement in both outage performance and ergodic rate.
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references
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