A Note on the RISP Criterion for NOMA Systems

IF 4.4 3区计算机科学 Q2 TELECOMMUNICATIONS IEEE Communications Letters Pub Date : 2024-12-09 DOI:10.1109/LCOMM.2024.3513939

Zhen Chen;Zizhuo Fang;Zhangling Duan;Mang Ou;Xiang Bi

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Abstract

As a paradigm shift in the scheme of wireless access, non-orthogonal multiple access (NOMA) can achieve massive connectivity and improve spectral efficiency, but introduces high complexity at the successive-interference-cancelation (SIC) receiver. In order to ensure low implementation complexity, SIC decoding has been designed by using a single criterion. The instantaneous-signal-power (ISP) criterion has been widely applied in NOMA, and the user with stronger ISP is first decoded. However, the ISP criterion ignores the impact caused by the data rate requirements in NOMA systems. Recently, we have proposed a new SIC criterion, namely the Relative ISP (RISP) criterion, to improve the ISP criterion to consider the impact of the target-data-rate (TDR) of each user. RISP is defined as a form of the ratio of ISP to TDR. In this letter, for the general multiple-user case at high signal-to-noise ratio, we mathematically prove that the RISP criterion has the better outage performance than the ISP criterion. Our conclusion provides a basic guidance for the design and implementation of NOMA systems in the next generation of wireless communication networks.

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关于NOMA系统的RISP准则的注解

非正交多址（NOMA）作为无线接入方案中的一种范式转换，可以实现大规模连接并提高频谱效率，但在连续干扰消除（SIC）接收器处引入了较高的复杂性。为了保证较低的实现复杂度，SIC译码采用了单准则设计。瞬时信号功率（ISP）准则在NOMA中得到了广泛的应用，ISP较强的用户首先被解码。但是，ISP标准忽略了NOMA系统中数据速率要求所带来的影响。最近，我们提出了一种新的SIC标准，即相对ISP （Relative ISP， RISP）标准，以改进ISP标准，考虑每个用户的目标数据速率（TDR）的影响。RISP被定义为ISP与TDR的比值形式。在本文中，我们从数学上证明了在高信噪比的一般多用户情况下，RISP准则比ISP准则具有更好的中断性能。研究结果为下一代无线通信网络中NOMA系统的设计与实现提供了基础指导。

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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来源期刊

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.