Physical layer security of multi-antenna receiver for vehicular communication

Abstract

As wireless networks continue to flourish worldwide and play an increasingly promi nent role, it has become crucial to provide effective solutions to the inherent secu rity issues associated with a wireless transmission medium. It becomes more crucial to provide security and maintain privacy when the users are mobile. In intelligent transportation systems, as the data exchange need increases between the vehicle, the possibility of eavesdropping also increases. In addition to that, traditional cryptog raphy may not be a feasible option to provide security due to their time-consuming operation while exchanging keys. It becomes even severe for low latency infotainment applications. Therefore, physical layer security is a prominent approach to enhance security and maintain privacy for vehicular networks. The primary concern of this thesis is to analyze secrecy performance for 5G and beyond vehicular networks and develop solutions for restricting eavesdropping. First, the secrecy performance over non-relay-based vehicular communication is analyzed. The dual antenna with vehicular to infrastructure scenario has been consid ered. A single legitimate transmitter, legitimate receiver, and eavesdropper have been considered. As a performance measure, secrecy outage probability, outage probability, and secrecy rate were analyzed. Second, to consider the shadowing and non-line of sight impact, the relay-based vehicular network was analyzed. For that, the amplify and-forward relay was considered with single antenna systems. The initial position of the relay has been considered with far and nearer distance from the legitimate trans mitter. Third, to gain insight over seamless link establishment between legitimate receiver and transmitter, multiple primary users have been considered and secrecy performance analyzed considering second-order statistics. The average secrecy out age rate and average secrecy outage duration have been achieved for the vehicular networks having a single eavesdropper. Finally, the solution to restrict eavesdropping has been provided using a convex optimization approach. Furthermore, for low-power backup devices, secrecy performance for 6G vehicular networks has been covered. The outcomes of the thesis will enhance the understanding of developing solutions against passive attacks for vehicular networks.