Performance Analysis of NOMA-Based Hybrid Satellite-Terrestrial Relay Networks With CCI

被引:5
|
作者
Chai, Rong [1 ]
Liu, Lei [1 ]
Zou, Fei [1 ]
Li, Jinhong [1 ]
Chen, Qianbin [1 ]
机构
[1] Chongqing Univ Posts & Telecommun, Sch Commun & Informat Engn, Chongqing 400065, Peoples R China
来源
IEEE TRANSACTIONS ON NETWORK SCIENCE AND ENGINEERING | 2023年 / 10卷 / 04期
基金
中国国家自然科学基金;
关键词
Hybrid satellite-terrestrial relay network; non-orthogonal multiple access; outage probability; average symbol error rate; mean energy efficiency; POWER ALLOCATION; COMMUNICATION; OUTAGE;
D O I
10.1109/TNSE.2023.3237623
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Hybrid satellite-terrestrial relay networks (HSTRNs) which exploit relay cooperative technology in the integrated system of satellites and terrestrial base stations (BSs) are expected to offer enhanced transmission performance benefited from the spatial gain of independent fading paths. To enable multi-user accessing and resource sharing among users, non-orthogonal multiple access (NOMA) technique can be applied in HSTRNs. In this paper, we consider a NOMA-based HSTRN where a satellite transmits signals to a relay base station (RBS) and a destination ground station (DGS), and RBS also serves a cellular user (CU) and DGS simultaneously by leveraging NOMA scheme. We assume that the satellite shares spectrum with a number of cellular small BSs (SBSs), hence SBSs will cause co-channel interference (CCI) to DGS, RBS and CU. We examine the transmission characteristics of the satellite and terrestrial links, and derive the closed-form expressions of the outage probability (OP) and average symbol error rate (ASER) of DGS and CU, respectively. Specially, we consider the effect of perfect and imperfect successive interference cancellation (SIC) on the ASER performance of CU. Then, considering the stochastic characteristics of satellite links and CCI, we analyze the mean energy efficiency (MEE) of the satellite and propose an optimal power allocation scheme which maximizes the MEE of the satellite and achieves system performance optimization. Simulation results demonstrate the effectiveness of the theoretical analysis and the proposed power allocation scheme.
引用
收藏
页码:2016 / 2029
页数:14
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