基于自适应功率分裂的协作非正交多址接入无线携能通信网络性能分析  

Performance analysis for cooperative NOMA networks based SWIPT with adaptive power splitting

作　　者：杨正 郑云 余月好 吴怡 董志诚[2] 邢松 YANG Zheng;ZHENG Yun;YU Yuehao;WU Yi;DONG Zhicheng;XING Song(College of Photonic and Electronic Engineering,Fujian Normal University,Fuzhou 350117,China;School of Engineering,Tibet University,Lhasa 850000,China;Department of Information Systems,California State University,Los Angeles,CA90032,USA)

机构地区：[1]福建师范大学光电与信息工程学院,福建福州350117 [2]西藏大学工学院,西藏拉萨850000 [3]加州州立大学洛杉矶分校信息系统系,美国洛杉矶CA90032

出　　处：《通信学报》2023年第1期177-188,共12页Journal on Communications

基　　金：国家自然科学基金资助项目(No.U1805262);福建省自然科学基金资助项目(No.2022J01169);福建省中央引导地方科技发展资金资助项目(No.2021L3010);福建省科技创新重点基金资助项目(No.2021G02006)。

摘　　要：为了提高无线通信系统的频谱利用率、降低功耗,针对双向协作非正交多址接入携能网络,提出了一种自适应功率分裂的无线携能准则。中继利用译码转发协议和用户的距离信息执行串行干扰消除,检测用户的信息并从发送端收割能量。发送端设计自适应功率分裂准则,使中继可以成功检测用户的信息,然后把剩余的能量全部用于能量传输,进而中继可以收割到最多的能量并将所解码的信息转发给接收端。基于所提的自适应功率分裂准则,分析网络的全局中断概率、端到端中断概率,以及高信噪比条件下的分集增益。与基于固定功率分裂的协作三级正交多址接入携能网络相比,基于自适应功率分裂的协作两级非正交多址接入携能网络可以获得更优的中断性能。In order to improve the spectrum effectiveness, decrease the power consumption of wireless communication system, for a two-way cooperative non-orthogonal multiple access(NOMA) network with simultaneous wireless information and power transfer(SWIPT), an adaptive power splitting scheme of SWIPT was proposed. Based on the decode-and-forward protocol and the users’ distance information, the successive interference cancellation was carried out at the relay to decode the users’ messages and harvest the energy from the sources. An adaptive power splitting scheme was proposed based on users’ channel state information, which the relay could successfully decode the users’ information and harvest the most energy from the sources. Based on the harvested energy, the relay forwarded the decoded information of the users in the next time slot. According to the proposed adaptive power splitting scheme, the overall outage probability,end-to-end outage probability, and the diversity gain at high signal-to-noise ratio were derived. Compared with three-way cooperative orthogonal multiple access network with fixed power splitting of SWIPT, the proposed adaptive power splitting of SWIPT for two-way cooperative NOMA networks can achieve much better outage performance.

关 键 词：自适应功率分裂 无线携能通信 非正交多址接入 中断概率 分集增益 

分 类 号：TN92[电子电信—通信与信息系统]