摘要
为了延长无线通信网络的寿命,提高系统的频谱效率和可靠性,扩大信号覆盖范围,对无线携能传输(Simultaneous Wireless Information and Power Transfer,SWIPT)和非正交多址接入(Non-Orthogonal Multiple Access,NOMA)技术进行研究,给出了一种简单的无线携能传输的非正交多址接入(Simultaneous Wireless Information and Power Transfer Non-Orthogonal Multiple Access,SWIPT-NOMA)传输策略。在该策略中,近用户利用功率分割(Power-Splitting,PS)协议收集基站发射信号的能量转发解码数据和自身数据,同时实现基站向远近两用户、近用户向远用户的数据传输。在考虑非线性能量收集(Energy Harvesting,EH)的基础上,推导了系统的中断概率的闭式结果,并进一步给出了高信噪比(Signal-to-Noise Ratio,SNR)下的中断性能下限。最后,通过仿真分析验证了理论推导的正确性,并得出了系统参数对系统性能的影响规律。
In order to prolong the life of wireless communication networks,improve the spectrum efficiency and reliability of the system,and extend the signal coverage,SWIPT(Simultaneous Wireless Information and Power Transfer) and NOMA(Non-Orthogonal Multiple Access) technologies are studied,and a simple SWIPT-NOMA transmission strategy is given in this paper.In the strategy,the near user uses the PS(Power-Splitting) protocol to harvest the energy of the signal transmitted by the base station,and forward the decoded data and its own data,so as to achieve the data transmission from the base station to the far and near users and from the near user to the far user.Considering the nonlinear EH(Energy Harvesting),the closed-form results of the outage probability of the system are derived,and the lower limit of the outage performance under high SNR(Signal-To-Noise Ratio) is further given.Finally,the correctness of the theoretical derivation is verified by simulation analysis,and the influence law of system parameters on system performance is obtained.
作者
张瑞轩
李恩玉
李振敏
ZHANG Ruixuan;LI Enyu;LI Zhenmin(School of Information and Control Engineering,Qingdao University of Technology,Qingdao Shandong 266520,China)
出处
《通信技术》
2024年第8期816-822,共7页
Communications Technology
基金
山东省自然科学基金(ZR2022MF273)
大学生创新创业训练计划项目(S202310429182,S202310429489)。
关键词
非正交多址接入
能量收集
无线携能传输
中断概率
non-orthogonal multiple access
energy harvesting
simultaneous wireless information and power transfer
outage probability
