基于SWIPT NOMA的星地系统性能分析

兰州理工大学学报 ›› 2021, Vol. 47 ›› Issue (6): 94-99.

• 自动化技术与计算机技术 • 上一篇下一篇

基于SWIPT NOMA的星地系统性能分析

赵进龙^*1,2,霍明明³,谭等泰¹

1.甘肃政法大学人工智能学院, 甘肃兰州 730070;
2.北京航空航天大学电子信息工程学院, 北京 100191;
3.兰州理工大学档案馆, 甘肃兰州 730050

收稿日期:2020-12-23 出版日期:2021-12-28 发布日期:2021-12-28
通讯作者: 赵进龙(1985-),男,河北井陉人,硕士,讲师.Email:zhaojinlong0010@163.com

Performance analysis of SWIPT NOMA based satellite-terrestrial system

ZHAO Jin-long^1,2, HUO Ming-ming³, TAN Deng-tai¹

1. School of Artificial Intelligence, Gansu University of Political Science and Law, Lanzhou 730070, China;
2. School of Electronic and Information Engineering, Beihang University, Beijing 100191, China;
3. Archives Center, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2020-12-23 Online:2021-12-28 Published:2021-12-28

摘要/Abstract

摘要： 为了提高星地系统的资源利用率和用户公平性,提出一种无线携能(simultaneous wireless information and power transfer,SWIPT) 非正交多址接入(non-orthogonal multiple access,NOMA)技术辅助星地系统的传输方案.首先,在非理想信道状态信息(channel state information,CSI)条件下研究了系统的中断性能,并推导了中断概率表达式.其次,通过分析渐近中断概率,发现由于存在非理想CSI导致中断概率在高信噪比区域出现了错误平层.此外,还研究了不同程度的信道估计误差和阴影衰落对系统吞吐量和能量效率的影响.最后,通过数值仿真结果验证了理论推导的正确性和SWIPT NOMA技术引入星地系统所获得的性能增益.

关键词: 星地系统, NOMA, SWIPT, 系统性能, 非理想CSI

Abstract: In order to improve the resource utilization and user fairness of satellite-terrestrial system, a simultaneous wireless information and power transfer (SWIPT) non-orthogonal multiple access (NOMA) technology assisted satellite-terrestrial system transmission scheme is proposed. Firstly, the outage performance of the system is investigated in the presence of imperfect channel state information (CSI), and the outage probability expression is derived. Secondly, by analyzing the asymptotic outage probability, it is observed that there is an error floor in the high SNR region due to the existence of imperfect CSI. In addition, the effects of channel estimation errors and shadow fading on system throughput and energy efficiency are studied. Finally, the numerical simulation results are provided to validate theoretical derivation and the performance gains obtained by introducing SWIPT NOMA technology into the satellite-terrestrial system.

Key words: satellite-terrestrial system, NOMA, SWIPT, system performance, imperfect CSI

中图分类号:

TN911

赵进龙,霍明明,谭等泰. 基于SWIPT NOMA的星地系统性能分析[J]. 兰州理工大学学报, 2021, 47(6): 94-99.

ZHAO Jin-long, HUO Ming-ming, TAN Deng-tai. Performance analysis of SWIPT NOMA based satellite-terrestrial system[J]. Journal of Lanzhou University of Technology, 2021, 47(6): 94-99.

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基于SWIPT NOMA的星地系统性能分析

Performance analysis of SWIPT NOMA based satellite-terrestrial system

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