无人机隐蔽通信资源分配研究综述OA

With the wide application of Unmanned Aerial Vehicle(UAV)in wireless communication,the research on physical layer security technology in UAV systems has become a hot topic in academia.Compared with traditional ground communication,UAV communication has advantages such as enhanced mobility,on-demand deployment capability and reduced costs.However,UAVs are vulnerable to security threats arising from the broadcast characteristics of air-to-ground Line of Sight(LoS)communication link during information transmission.In contrast to the encryption and physical layer security technology aiming at preventing eavesdropping,covert communication aims to conceal the existence of information transmission,providing better confidentiality and security protection.By reviewing relevant literature,the approaches of resource allocation for UAV covert communication are summarized from five aspects,including resource allocation of UAV base station,resource allocation in UAV relay system,resource allocation for UAV surveillance,resource allocation for UAV cooperative interference,and resource allocation in Intelligent Reflective Surface(IRS)enhanced UAV Communication.Finally,main issues in current research are summarized,and future research trends of the UAV covert communication system are discussed.