认知中继三跳网络联合优化（英文）

发布时间：2018-01-29 16:37

本文关键词： 解码转发三跳认知中继网络时间功率分配叠加编码　出处：《Frontiers of Information Technology & Electronic Engineering》2017年02期 　论文类型：期刊论文

【摘要】：认知中继网络中,传输的吞吐量和传输距离一直是衡量性能的重要指标。现有的研究多数都集中在两跳网络的优化,但其也存在着传输距离不长,只能进行单项传输等缺点。本文提出了一种新的使用认知中继的三跳网络传输方案,通过三阶段的传输过程,实现了次级用户之间的双向传输。同时,引入了叠加编码技术来处理网络中双接收节点的情况。本文将这个三阶段的联合优化问题转化为一个非线性的优化问题,并进行了求解。仿真结果表明,本文提出的优化方法可以在不增加中继跳数的情况下,延长主用户传输距离,并同时提高次级用户的传输吞吐量。
[Abstract]:In cognitive relay networks, the throughput and distance of transmission is always an important indicator of performance. Most of the existing studies focus on the optimization of two-hop networks, but there is also a short transmission distance. In this paper, a new three-hop network transmission scheme using cognitive relay is proposed. Through the three-stage transmission process, the two-way transmission between secondary users is realized. At the same time. The superposition coding technique is introduced to deal with the double receiving nodes in the network. In this paper, the three stage joint optimization problem is transformed into a nonlinear optimization problem and solved. The simulation results show that. The proposed optimization method can extend the transmission distance of primary users and improve the throughput of secondary users without increasing the number of relay hops.
【作者单位】： College
【基金】：Project supported by the Zhejiang Provincial National Natural Science Foundation(No.LQ14F020005) the National Natural Science Foundation of China(Nos.61379123 and 61402414) the Research Program of the Educational Commission of Zhejiang Province,China(No.Y201431815)
【分类号】：TN925
【正文快照】： 1 IntroductionThe frequency spectrum is critical for wirelesscommunications.The Federal CommunicationsCommission(FCC)reports in its survey that the li-censed spectrum is not fully used,with its utilizationranging from 15%to 85%(Spectrum EfficiencyWorking

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