NOMA下行链路的FD中继系统性能研究  

Performance analysis of the FD relay system for downlink NOMA

作　　者：梁赞阳 李恩玉 郑美娟 王晔 区东生 LIANG Zanyang;LI Enyu;ZHENG Meijuan;WANG Ye;OU Dongsheng(School of Information and Control Engineering,Qingdao University of Technology,Qingdao 266525,China)

机构地区：[1]青岛理工大学信息与控制工程学院,青岛266525

出　　处：《青岛理工大学学报》2024年第5期154-162,共9页Journal of Qingdao University of Technology

基　　金：山东省自然科学基金资助项目(ZR2022MF273);大学生创新创业训练计划项目(202110429240,202110429243,S202210429170,S202110429249)。

摘　　要：非正交多址接入(Non-Orthogonal Multiple Access,NOMA)和带内全双工(Full-Duplex,FD)技术都可以有效地提升无线频谱资源的利用率。现有针对NOMA下行链路的FD中继通信系统的研究,都是采用固定的解码顺序,并没有全面考虑信道的随机性影响,存在着其他解码顺序的可能。采用了自适应的解码策略,对NOMA-FD中继系统的下行链路中断性能进行了全面的分析。在分析过程中充分考虑了非理想串行干扰消除技术下的系统精确中断性能,并推导了高信噪比下的近似结果。结果表明,本文采用的解码策略相比同模型的相关文献采用的策略具有较大的中断性能提升。Both non-orthogonal multiple access(NOMA)and in-band full-duplex(FD)technologies can effectively improve the utilization of wireless spectrum resources.The existing studies on FD relay communication systems for downlink NOMA use a fixed decoding order and do not fully consider the randomness effect of the channel and the possibility of other decoding orders.An adaptive decoding strategy is used and a comprehensive analysis of the outage performance of the downlink NOMA-FD relay system is derived.The exact outage performance of the system under the imperfect successive interference cancellation technique is fully considered in the analysis,and the approximate results under a high signal-to-noise ratio are derived.The results show that the decoding strategy used in this study has a considerable outage performance improvement,compared with the related studies of the same model.

关 键 词：非正交多址接入 全双工 协作中继 串行干扰消除 中断概率 

分 类 号：TN929.5[电子电信—通信与信息系统]