Countering Pilot Attack In Millimeter Wave Multi Antenna Communication System

With the rapid development of wireless communication networks and the rapid development and iteration of new technology applications in the rapidly changing society,their applications have blurred the boundary between the ideal world and real life,and profoundly changed the way we touch and recognize the world.With the increase in the number of mobile communication devices such as mobile phones and the expansion of mobile range,the task of ensuring the security of wireless communication has become more and more arduous.Therefore,ensuring that the wireless communication process is not eavesdropped by malicious users has become an important part of the construction of modern communication infrastructure.This paper intends to study the physical layer security technology of millimeter wave multi antenna communication system,and will examine the communication security when malicious users carry out pilot attacks.The pilot attack will make the communication base station receive the pilot signal from the malicious user and mislead the base station to misestimate the status information of the legitimate channel,resulting in information leakage in the communication system.In order to illustrate the damage to the security of wireless communication system caused by malicious users’ pilot attack,and to reduce the danger caused by it as much as possible,this paper proposes a resistance scheme for two different network structures of millimeter wave multi antenna communication system.Specifically,the main work of this paper includes:(1)This paper discusses the security damage of the traditional millimeter wave multi antenna communication system and the relay assisted millimeter wave multi antenna ground communication system after the pilot attack,and draws a conclusion that the pilot attack will indeed reduce the security achievable rate of the communication system through computer matlab simulations.(2)In order to detect whether there is a pilot attack in the traditional millimeter wave multi antenna communication system,this paper proposes a scheme using dual pilots to detect the pilot attack.The base station uses two pilot sequences sent by the user to assist in the detection.Computer matlab simulation verifies the feasibility and superiority of the detection scheme.In addition,this paper also mentions that the base station improves its precoding vector acquisition scheme based on the channel estimation value in order to reduce the harm of pilot attack.Computer simulation verifies that this measure is helpful to improve the security and achievable rate of millimeter wave multi antenna communication system.(3)In order to detect whether there is pilot attack in millimeter wave multi antenna ground communication system,a relay assisted pilot attack detection scheme is proposed in this paper.Computer matlab simulations show that the proposed scheme has good detection performance.