A Note on the RISP Criterion for NOMA Systems

IF 3.7 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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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.

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