基于能量收集全双工中继的NOMA系统性能研究  

Performance Analysis of Noma System Based on Energy Harvesting Full-duplex Relay

作　　者：任宇灿 康琳[1] 董增寿[1] 杨颜璐 REN Yu-can;KANG Lin;DONG Zeng-shou;YANG Yan-lu(School of Electronics and Information,Taiyuan University of Science and Technology,Taiyuan 030024,China;Shanxi Natural Gas Co.,Ltd.,Taiyuan 030032,China)

机构地区：[1]太原科技大学电子信息工程学院,太原030024 [2]山西天然气有限公司,太原030032

出　　处：《太原科技大学学报》2023年第6期504-508,共5页Journal of Taiyuan University of Science and Technology

基　　金：山西省重点研发计划(201903D121023,201903D321012);国家大学生创新项目(2019950)。

摘　　要：针对全双工中继转发信号时存在的自干扰现象会降低系统性能的问题,在一个双用户下行链路全双工(FD)非正交多址(NOMA)中继网络中,从中断概率的角度分析了全双工中继的自干扰因素对系统中断性能的影响。其中,FD中继使用能量收集(EH)技术来辅助基站和远端用户之间的通信。整个通信过程分为两个阶段——能量收集阶段与信息传输阶段,即采用的是功率分配方案。通过推导,得到了远、近用户中断概率的闭式表达式,并利用蒙特卡洛仿真验证了理论分析的正确性。分析了FD中继干扰消除系数对远、近用户的影响,得到了远用户中断概率最小时功率分配比的最佳值。In order to solve the problem that self-jamming can reduce the system performance when full-duplex relay is transmitting signals,this paper analyzes the influence of self-interference of full-duplex relay on the system outage performance in a full-duplex(FD)non-orthogonal multiple access(NOMA)relay network with two-user downlink from the point of view of interruption probability.The FD relay uses energy harvesting(EH)technology to assist communication between the base station and the far user.The whole communication process is divided into two stages-energy collection stage and information transmission stage,that is,the power splitting relaying is adopted.Through the derivation,the closed expressions of the interrupt probability of near and far users are obtained,and the correctness of the theoretical analysis is verified by Monte Carlo simulation.The influence of the interference elimination coefficient of FD relay on the far and near users is analyzed,and the optimal value of the power allocation ratio of the minimum interrupt probability of the far users is obtained.

关 键 词：NOMA 能量收集 功率分割协议 全双工 中断概率 

分 类 号：TN92[电子电信—通信与信息系统]