Performance Analysis and Power Allocation for NOMA-assisted Cloud Radio Access Network

被引：0

作者：

Xu, Fangcheng ^{[1
]}

Yu, Xiangbin ^{[1
]}

Xu, Weiye ^{[2
]}

Cai, Jiali ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Elect & Informat Engn, Nanjing 210016, Peoples R China

[2] Nanjing Inst Technol, Sch Informat & Commun Engn, Nanjing 211167, Peoples R China

来源：

KSII TRANSACTIONS ON INTERNET AND INFORMATION SYSTEMS | 2021年 / 15卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Cloud Radio Access Networks; Ergodic Sum Rate; Non-Orthogonal Multiple Access; Power Allocation; Outage Probability; NONORTHOGONAL MULTIPLE-ACCESS; 5G; CHALLENGES; SYSTEMS; OUTAGE;

D O I：

10.3837/tiis.2021.03.019

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

With the assistance of non-orthogonal multiple access (NOMA), the spectrum efficiency and the number of users in cloud radio access network (CRAN) can be greatly improved. In this paper, the system performance of NOMA-assisted CRAN is investigated. Specially, the outage probability (OP) and ergodic sum rate (ESR), are derived for performance evaluation of the system, respectively. Based on this, by minimizing the OP of the system, a suboptimal power allocation (PA) scheme with closed-form PA coefficients is proposed. Numerical simulations validate the accuracy of the theoretical results, where the derived OP has more accuracy than the existing one. Moreover, the developed PA scheme has superior performance over the conventional fixed PA scheme but has smaller performance loss than the optimal PA scheme using the exhaustive search method.

引用

页码：1174 / 1192

页数：19

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