Physical layer secure communication method based on multi-radio cooperative precoding

Abstract

The invention discloses a physical layer secure communication method based on multi-radio cooperative precoding, which is suitable for secure information transmission between a user terminal and a base station in a heterogeneous wireless network. In the heterogeneous wireless network environment, the user terminal fully utilizes the multi-radio access technology to realize the cooperative secure information transmission between different communication modes. The physical layer secure communication method considers two situations that instantaneous channel state information of an eavesdropping channel between a source node and an eavesdropping node is known and unknown separately, preprocesses a source node signal by means of multi-mode cooperative precoding, and transmits data information after precoding to a destination node. Compared with the traditional multi-mode switching selection method, the multi-mode cooperative method provided by the invention significantly improves the secure transmission rate of wireless transmission, and is conductive to solving the security problem caused by the eavesdropping node existing in the multi-mode communication scene.

Description

technical field [0001] The invention relates to a method for resisting eavesdropping attacks, in particular to a physical layer secure communication method based on multi-radio cooperative precoding, which belongs to the technical field of wireless communication. Background technique [0002] With the continuous development of wireless network communication technology, in order to meet the communication needs of different wireless terminals, today's wireless communication network has developed into a heterogeneous wireless network in which multiple radio access technologies coexist, such as wireless personal area network (such as Bluetooth), wireless Local area network (such as Wi-Fi), public mobile communication network (2G, 3G, 4G), satellite communication network and Ad Hoc network, etc. If these heterogeneous networks cannot be interconnected and interoperable, it is difficult for wireless user terminals to perform corresponding network mode switching according to their ...

AI Technical Summary

Problems solved by technology

At present, more consideration is given to using the difference between the legal transmission channel capacity and the eavesdropping channel capacity to express the confidentiality performance of wireless communication, that is, the larger the difference, the better the confidentiality, and vice versa.

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