Wireless communication physical layer authentication method

Abstract

The invention discloses a wireless communication physical layer authentication method. The method comprises the following steps of S1, data acquisition, wherein channel estimation is carried out on signals from a sending end through a receiving end to obtain multi-path time delay information, the sending end belongs to a legal user or an illegal user, and the receiving end belongs to an authentication party and performs identity authentication on the authentication party; S2, SVM authentication model obtaining; S3, multi-path time delay feature training; S4, multi-path time delay feature detection. By using a support vector machine, good tracking learning can be carried out on continuously changing channel multi-path time delay features, and newly estimated multi-path time delay information is judged and detected. By using the channel multi-path time delay features and an SVM model, classified learning is carried out on the multi-path time delay features of users, and therefore the authentication efficiency in the wireless communication environment is improved.

Description

technical field [0001] The invention relates to a safety authentication method in the field of wireless transmission, in particular to a wireless communication physical layer authentication method. Background technique [0002] The wireless communication system has the characteristics of open broadcasting, which makes it vulnerable to eavesdropping and imitation attacks. As a commonly used security method, identity authentication is used to judge the legitimacy of user identities, which can effectively prevent unauthorized users from accessing and accessing. In recent years, physical layer authentication technology has gradually become a research hotspot and has been widely used in wireless communication network security. A search of prior art documents reveals that an identity tag can be superimposed on the sent signal and transmitted together, and authenticated through the tag. This method needs to coordinate the energy between the tag and the signal, which has a great i...

AI Technical Summary

Problems solved by technology

This method needs to coordinate the energy between the tag and the signal, which has a great influence on the transmission signal itself, the calculation is complicated, and the characteristics of the wireless channel are not fully utilized.

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