智能反射表面辅助CR-NOMA系统的速率分裂

IF 2.9 3区计算机科学 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS

Journal of Communications and Networks Pub Date : 2023-01-09 DOI:10.23919/JCN.2022.000053

Haoyu You;Zhiquan Bai;Hongwu Liu;Theodoros A. Tsiftsis;Kyung Sup Kwak

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引用次数: 2

摘要

智能反射面（IRS）被认为是提高无线通信系统性能的一种很有前途的技术。在本文中，我们提出了一种用于IRS辅助认知无线电启发的非正交多址（CR-NOMA）系统的速率分割（RS）方案，其中必须保证主用户（PU）的服务质量（QoS）要求与正交多址相同。在IRS的帮助下，PU的可容忍干扰功率的阈值得到了提高，这反过来又使得可以增加二次用户（SU）的可实现速率。针对所提出的RS方案，联合设计了最优发射功率分配、目标速率分配和连续干扰消除（SIC）解码顺序。考虑到直接链路和IRS反射信道的统计，分别推导了PU和SU中断概率的闭合表达式。给出了各种仿真结果，以阐明所提出的RS方案相对于现有的CR-NOMA和IRS辅助的CR-NOMA方案所实现的增强的中断性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Rate-splitting for intelligent reflecting surface-assisted CR-NOMA systems

Intelligent reflecting surface (IRS) has been regarded as promising technique to improve system performance for wireless communications. In this paper, we propose a rate-splitting (RS) scheme for an IRS-assisted cognitive radio-inspired non-orthogonal multiple access (CR-NOMA) system, where the primary user's (PU's) quality of service (QoS) requirements must be guaranteed to be same as in orthogonal multiple access. Assisted by IRS, the threshold for the PU's tolerable interference power is improved, which in turn makes it possible to increase the achievable rate for the secondary user (SU). The optimal transmit power allocation, target rate allocation, and successive interference cancellation (SIC) decoding order are jointly designed for the proposed RS scheme. Taking into account the statistics of the direct link and IRS reflecting channels, closed-form expression for the PU's and SU's outage probabilities are respectively derived. Various simulation results are presented to clarify the enhanced outage performance achieved by the proposed RS scheme over the existing CR-NOMA and IRS-assisted CR-NOMA schemes.

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来源期刊

Journal of Communications and Networks 工程技术-电信学

CiteScore

6.60

自引率

5.60%

发文量

审稿时长

14.4 months

期刊介绍： The JOURNAL OF COMMUNICATIONS AND NETWORKS is published six times per year, and is committed to publishing high-quality papers that advance the state-of-the-art and practical applications of communications and information networks. Theoretical research contributions presenting new techniques, concepts, or analyses, applied contributions reporting on experiences and experiments, and tutorial expositions of permanent reference value are welcome. The subjects covered by this journal include all topics in communication theory and techniques, communication systems, and information networks. COMMUNICATION THEORY AND SYSTEMS WIRELESS COMMUNICATIONS NETWORKS AND SERVICES.