摘要
提高认知中继通信系统的能量效率(EE)和频谱效率(SE)是近些年研究的热点。经典AF协议只在目的端只合并时隙2接收到的信号。而改进型放大转发(RAF)协议在目的端合并时隙1和时隙2接收到的信号。推导并分析了RAF中继系统的SE和EE,并分析了SE和EE之间的关系。提出了一种中继功率优化方案,利用中继节点两端的信噪比(SNR)的大小,来决定中继节点的发射功率。仿真证明该方案提高了RAF中继系统的SE和EE。
The improvement of energy efficiency (EE) and spectrum efficiency (SE) of cognitive relay communication system now becomes a research hotspot in recent years. The classic amplify and forward (AF) protocol only merges the signals received by slot 2 at the destination end, while the modified amplify-andforward (RAF) protocol merges the signals received by slot 1 and slot 2 at the destination end. SE and EE of the RAF relay system are deduced and analyzed, including the relationship of between SE and EE.Meanwhile a relay power optimization scheme is proposed, in which the signal-to-noise ratio (SNR) of the both ends of relay node is used to determine the transmit power of relay node.Simulation indicates that the proposed scheme could improve SE and EE of the RAF relay system.
作者
桂纾
仇润鹤
GUI Shu;QIU Run-he(College of Information Sciences and Technology,Donghua University,Shanghai,201620,China;ME Engineering Research Center of Digitized Textile & Apparel Technology,Donghua University,Shanghai 201620,China)
出处
《通信技术》
2019年第4期878-884,共7页
Communications Technology
基金
国家自然科学基金面上项目(No.61671143)~~
关键词
放大转发协议
能量效率
频谱效率
功率分配
AF protocol
energy efficiency
spectrum efficiency
power allocation
