分布式认知协同无线网络物理层安全理论与传输方法研究

项目名称： 分布式认知协同无线网络物理层安全理论与传输方法研究

项目编号： No.61501507

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 黄育侦

作者单位： 中国人民解放军军事科学院国防科技创新研究院

项目金额： 23万元

中文摘要： 随着无线通信的飞速发展和无线数据业务的爆发式增长，频谱资源短缺的问题日益凸显。与此同时，无线传播环境的开放性和用户终端的移动性等因素使得无线通信系统面临着更多的安全威胁。本项目以改善无线频谱资源利用效率与信息传输安全为目标，着重研究了认知协同无线网络物理层安全理论与传输方法。通过建立中继窃听信道模型，利用物理层安全信息理论，分析了认知协同无线网络的物理层安全性能，揭示系统参数影响物理层安全性能的作用机理；以此为基础，着力解决不同信道状态信息条件下的分布式预编码设计问题和人工干扰设计方案，实现认知用户信息的安全与可靠传输；最后，致力于设计增强物理层安全性能的协作传输策略，通过在主次用户之间引入合作机制，解决频谱资源共享和网络的物理层安全问题，为下一代无线通信网络的发展提供理论指导与技术支撑。

中文关键词： 认知无线电；物理层安全；协同通信；窃听信道；预编码设计

英文摘要： With the rapid development of wireless communications, the amount of data of wireless communication services has explosively increased, which results in the problem of spectrum scarcity being more serious. Meanwhile, due to the broadcast nature of wireless medium and the mobility of user terminals, security is a critical concern in wireless communication systems. Hence, this project aims at investigating the fundamental theorem and transmission techniques of physical-layer security for cognitive cooperative wireless networks with the emphasis on improving the spectral efficiency and the data of secure transmission. Taking this into mind, we firstly design the channel model of relay-eavesdropping for spectrum sharing networks, utilize the information-theoretic security to analyze the secrecy performance, and seek to extract key design insights by investigating the impact of system parameters on the secrecy performance. Based on these fundamental results, distributed precoder and artificial jamming strategies are respectively designed to guarantee the security and reliability of transmission for cognitive user’s data under different channel state information scenarios. Finally, we aim to develop cooperative transmission algorithms between primary users and secondary users to enhance the physical-layer security and solve the problem of spectrum sharing in distributed cognitive cooperative networks. All in all, the results of this project provide both design guidelines and technical support for next generation wireless communication networks.

英文关键词： Cognitive Radio;Physical-Layer Security;Cooperative Communication;Wiretap Channel;Precode Design