Performance of NOMA-Enabled Cognitive Satellite-Terrestrial Networks With Non-Ideal System Limitations

被引:21
作者
Akhmetkaziyev, Yerassyl [1 ]
Nauryzbayev, Galymzhan [1 ]
Arzykulov, Sultangali [2 ]
Eltawil, Ahmed M. [2 ]
Rabie, Khaled M. [3 ]
Li, Xingwang [4 ]
机构
[1] Nazarbayev Univ, Sch Engn & Digital Sci, Nur Sultan 010000, Kazakhstan
[2] King Abdullah Univ Sci & Technol, Comp Elect & Math Sci & Engn Div, Thuwal 23955, Saudi Arabia
[3] Manchester Metropolitan Univ, Dept Engn, Manchester M15 6BH, Lancs, England
[4] Henan Polytech Univ, Sch Phys & Elect Informat Engn, Jiaozuo 454000, Henan, Peoples R China
关键词
NOMA; Satellites; Relays; Resource management; Performance evaluation; Hardware; 5G mobile communication; Cognitive radio (CR); coverage probability; non-orthogonal multiple access (NOMA); optimization; satellite-terrestrial network (STN); NONORTHOGONAL MULTIPLE-ACCESS; POWER ALLOCATION; RELAY NETWORKS; HARDWARE IMPAIRMENTS; OUTAGE;
D O I
10.1109/ACCESS.2021.3061278
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Satellite-terrestrial networks (STNs) have received significant attention from research and industry due to their capability of providing a stable connection to rural and distant areas, where the allocation of terrestrial infrastructures is uneconomical or difficult. Moreover, the STNs are considered as a promising enabler of fifth-generation communication networks. However, expected massive connectivity in future communication networks will face issues associated with spectrum scarcity. In this regard, the integration of cognitive radio and non-orthogonal multiple access (NOMA) techniques into STNs is considered as a promising remedy. Thereafter, in this article, we investigate NOMA-assisted cognitive STN under practical system conditions, such as transceiver hardware impairments, channel state information mismatch, imperfect successive interference cancellation, and interference noises. Generalized coverage probability formulas for NOMA users in both primary and secondary networks are derived considering the impact of interference temperature constraint and its correctness is verified through Monte Carlo simulation. Furthermore, to achieve performance fairness among the users, power allocation factors based on coverage fairness for primary and secondary NOMA users are provided. Moreover, the numerical results demonstrate superior performance compared to the ones obtained from an orthogonal multiple access scheme and examine the imperfection's impact on the system performance in terms of coverage and throughput.
引用
收藏
页码:35932 / 35946
页数:15
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