Physical Layer Authentication Based on Secret Pilot

In mobile communication system, traditional authentication mechanism is to test the sender at the higher level by using cipher algorithm to compare the result. The purpose is to prevent counterfeit behaviors of the attacker. This paper brings forward a new method of authentication on physical layer. Using the private pilot signal and hypothesis testing, the user of wireless channel is identified. In the view of signal transmission model and information theory, this paper analyzes security and puts forward the methods to generate and update private pilot. Under the typical channel model of 3GPP, simulation is carried out to verify the proposed method. Simulation results show that this method has characteristics of good performance, low computation complexity and simple practice.