Physical layer secure transmission method and system based on 4-WFRFT in channel related scene, and electronic equipment

Abstract

The invention provides a physical layer secure transmission method and system based on 4-WFRFT in a channel related scene and electronic equipment. The method is applied to the scene that a transmitting end is provided with NA antennas, a legal receiving end is provided with NB antennas, and an eavesdropping end is provided with one antenna. The main channel adopts an antenna selection technology, and one channel with the best channel state is selected from NA * NB independent channels for information transmission; the eavesdropping end is in a passive eavesdropping state and does not generate any form of interference on a main channel; the main channel and the eavesdropping channel are both subjected to slow fading, and the method makes full use of the change of the signal characteristics of the communication signal by the 4-WFRFT technology, so that the signal-to-noise ratio of the eavesdropping end is reduced while the signal-to-noise ratio of the legal receiving end is not affected, and the effect of improving the traversal secrecy capacity is achieved.

Description

technical field [0001] The invention belongs to the technical field of secure communication, and in particular relates to a 4-WFRFT-based physical layer secure transmission method, system and electronic equipment in channel-related scenarios. Background technique [0002] In the process of social development, information security has always been a hot topic. Traditional information security relies on encryption algorithms at the application layer, which corresponds to computing security. But as new computing power increases, the encryption algorithm will be at risk of being cracked. Physical layer security aims to use the random characteristics of wireless channels to establish secure communication, and it is absolute security based on information theory. [0003] Due to the reflection and refraction of the signal or the eavesdropper actively approaches the legal receiving end, there will be a correlation between the main channel and the eavesdropping channel. When the 4-...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the traversal security capacity improvement effect is limited in the scenario where there is channel correlation between the main channel and the eavesdropping channel, and proposes a physical layer security transmission method, system and electronic device based on 4-WFRFT in the channel correlation scenario

Images