全双工窃听下的无人机通信保密性能分析

针对无人机能量受限且通信易受到窃听攻击的问题,提出一种基于能量采集的无人机无线供电通信模型,并分析其在全双工主动窃听下的保密性能.首先,采用基于仰角的视距和非视距路径损耗模型对地空无线信道进行建模.然后,将无人机的传输中断概率限制在一个可容忍的最大阈值内,得到基站的最优编码速率,进而推导出无人机的保密中断概率的解析闭合...

Secrecy performance analysis of UAV-based communications against full-duplex eavesdropping

Focusing on the problem of unmanned aerial vehicle (UAV) energy limitation and communication vulnerability to eavesdropping attack, a wireless powered UAV communication model based on energy harvesting is proposed, and its secrecy performance under full-duplex proactive eavesdropping is analyzed. Firstly, the line-of-sight (LoS) and non-line-of-sight (NLoS) path loss probabilistic model based on elevation is used to model the ground-air wireless channel. Secondly, the transmission outage probabilities of UAV is limited to a maximum tolerable threshold and the optimal coding rate of the base station is obtained, and then the analytical closed-form expression of UAV's secrecy outage probability is derived. Finally, Monte-Carlo simulations verify the validity of the theoretical derivation, and analyze the influence of base station's transmission power, time factor of energy harvesting, environments and other factors on the security of UAV communication, which provides a guide and basis for the design of actual system.