无人机通信网络物理层安全传输技术

下一代通信网络可利用无人机的高移动性满足其高覆盖、低延迟等通信需求,但安全传输的问题也由于无线信道的广播特性与日益增加的通信节点数量亟待解决.因为无人机是资源受限的空中平台,上层加密技术难以在无人机通信网络中发挥同等有效的作用.物理层安全的本质是对信道进行人为设计从而实现合法信道与窃听信道的差异最大化,在无人机通信网络...

Time Delay Estimation Using Cross-power Spectrum Phase

The high mobility of Unmanned Aerial Vehicles (UAVs) can be utilized to meet requirements of the next-generation communication networks such as high coverage and low latency, while due to the broadcast nature of wireless channels and the increasing number of nodes, the problem of secure transmission also needs to be urgently addressed. Since UAVs are resource-constrained aerial platforms, upper-layer encryption techniques can hardly play an equally effective role in UAV communication networks. The essence of physical layer security is to design artificially the communication channel so as to maximize the difference between the legitimate and eavesdropping channel, and the application of physical layer security technology to UAV communication networks can assist to achieve a compromise between confidential transmission and energy efficiency. This paper reviews the current researches on physical layer security transmission technology of UAV communication networks. Specifically, typical physical layer security transmission technologies are firstly introduced in scenarios, and then the challenges in their applications into UAV communication networks are analyzed. Finally, new scenarios, technologies, and methods for the development of physical layer security transmission technologies in UAV communication networks are prospected to provide a new perspective for the research on physical layer security transmission technology of UAV communication networks.