《计算机应用研究》|Application Research of Computers

一种基于叠加编码的协作传输协议

Cooperative transmission protocol based on superposition coding

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作者 芮雄丽,曹雪虹
机构 1.南京邮电大学 通信与信息工程学院,南京 210003;2.南京工程学院 信息与通信工程学院,南京 210067
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文章编号 1001-3695(2020)12-043-3736-03
DOI 10.19734/j.issn.1001-3695.2019.09.0551
摘要 针对传统三节点协作通信模型虽简单易行,但其中两阶段协作传输过程中中继节点通常无偿为源节点转发数据,存在频谱效率低的缺点,基于解码转发(decode and forward,DF)协作协议,以提高系统传输速率为目标,利用链路层控制信息的交换获得链路状态信息(channel statue information,CSI),提出一种基于叠加编码的协作通信机制。协作中,允许中继节点在转发源节点数据的同时,利用叠加编码进行自身数据的发送,通过灵活调整叠加编码时的功率分配,保证系统的传输速率。仿真结果表明,该机制能有效提高系统的传输速率。
关键词 协作传输; 叠加编码; 功率分配; 速率; 解码转发
基金项目 江苏省自然科学基金资助项目(BK20160781)
江苏省普通高校研究生科研创新计划资助项目(CXZZ12_0475)
本文URL http://www.arocmag.com/article/01-2020-12-043.html
英文标题 Cooperative transmission protocol based on superposition coding
作者英文名 Rui Xiongli, Cao Xuehong
机构英文名 1.College of Telecommunications & Information Engineering,Nanjing University of Posts & Telecommunications,Nanjing 210003,China;2.School of Information & Communication Engineering,Nanjing Institute of Technology,Nanjing 210067,China
英文摘要 The traditional three-node cooperative communication model is simple and feasible, but in the two-stage cooperative transmission process, relay nodes usually help source nodes forward data for free. It reduces the efficient spectrum utilization when the links are of different qualities. Based on the decode-and-forward(DF) cooperative protocol, this paper proposed a new cooperative forwarding scheme. It could improve the transmission rate of the system by using superposition coding. The scheme used the CSI to process the relay selection and power optimal allocation. In collaboration, relay nodes transmitted their own data by superposition coding while forwarding the data of source nodes. By flexibly adjusting the power allocation during superposition coding, the proposed transmission scheme could guarantee the transmission rate of the system. Simulation results show that the proposed scheme can effectively improve the transmission rate of the system.
英文关键词 cooperative transmission; superposition coding; power allocation; rate; DF
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收稿日期 2019/9/7
修回日期 2019/10/24
页码 3736-3738
中图分类号 TN929.5
文献标志码 A