FD-SWIPT双向中继系统中基于天线选择与波束成形联合优化的高能效和吞吐量最大化方案  

Energy efficiency and throughput maximization scheme based on joint antenna selection and beamforming optimization in FD-SWIPT bidirectional relay systems

作　　者：谢显中[1] 扶渝茜 陈九九[1] Xianzhong XIE;Yuxi FU;Jiujiu CHEN(Institute of Personal Communications,Chongqing University of Posts and Telecommunications,Chonqing 400065,China)

机构地区：[1]重庆邮电大学个人通信研究所

出　　处：《中国科学：信息科学》2019年第9期1217-1230,共14页Scientia Sinica(Informationis)

基　　金：国家自然科学基金(批准号:61271259,61471076,61601070);重庆市教委科学技术研究项目(批准号:KJZD1801012,KJ1600411);重庆市基础与前沿研究计划(批准号:CSTC2016jcyjA0455);长江学者和创新团队发展计划(批准号:IRT1299);重庆市科委重点实验室专项经费(批准号:CQJK)资助项目

摘　　要：本文考虑了一个利用full-duplex simultaneous wireless information and power transfer (FDSWIPT)双向中继提供移动通信蜂窝网络中小区覆盖,同时改进吞吐量和能量效率的应用场景.针对FD-SWIPT双向中继研究存在问题,提出了FD-SWIPT双向中继系统中基于天线选择与波束成形联合优化的高能效和吞吐量最大化方案.首先,给出了一种低复杂度次优天线分组算法,在中继接收端使用天线分组策略,将信道条件好的接收信号用于传输,剩下的信号用于能量采集.进一步,在中继发送端设计了波束成形方案,并利用最大广义特征值方法优化波束成形矢量,达到优化接收端信干噪比的目的.仿真结果表明,所提出的联合优化方案能有效提升系统的和吞吐量与能量效率,且天线选择方案起到了重要的作用.FD-SWIPT two-way relay is used to provide cell coverage in mobile cellular networks and improve the throughput and energy efficiency of the system.To address the problem in FD-SWIPT bidirectional relay research,an efficient and throughput maximization scheme based on joint optimization antenna selection and beamforming in the FD-SWIPT bidirectional relay system is proposed in this study.First,a sub-optimal antenna grouping algorithm with low complexity is presented.The strategy of antenna grouping is used at the relay receiver to transmit the received signal with great channel CSI to the destination node,and then the remaining signal is used for energy harvest.Second,the beamforming scheme is designed at the relay transmitter,and the maximum generalized eigenvalue method is used to optimize the beamforming vector and enhance the signalto-interference-plus-noise ratio of the system.The simulation results show that the proposed joint optimization scheme can effectively improve the throughput and energy efficiency of the system,and the antenna selection scheme plays an important role in the system.

关 键 词：全双工中继 信息与能量同传 波束成形 天线选择 吞吐量 能量效率 

分 类 号：TN929.5[电子电信—通信与信息系统]