Wireless secure transmission method based on random frequency array and intelligent reflecting surface

A transmission method and wireless security technology, applied in the directions of reducing energy consumption, space transmit diversity, interference to communication, etc., can solve the problem of wasting channel spectrum bandwidth resources, etc.

Active Publication Date: 2021-04-20
FUZHOU UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

In the work where only random frequency arrays participate, the directional modulation technology with artificial noise is often used to assist in the safe tr

Method used

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  • Wireless secure transmission method based on random frequency array and intelligent reflecting surface
  • Wireless secure transmission method based on random frequency array and intelligent reflecting surface
  • Wireless secure transmission method based on random frequency array and intelligent reflecting surface

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Embodiment Construction

[0097] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0098] Please refer to figure 1 , the present invention provides a wireless secure transmission method based on a random frequency array and an intelligent reflector, and provides a multi-user system including a transmitting antenna connected in sequence, an intelligent reflector controller and an intelligent reflector, specifically comprising the following steps:

[0099] Build a multi-user system model, and select the weighted sum of the maximum signal-to-noise ratio of all expected users in the system as the objective function of the system;

[0100] By combining the corresponding convex optimization theory and using the idea of ​​alternate iterative optimization, the corresponding active beamforming vector and passive beamforming matrix are obtained, that is, the reflection matrix of the intelligent reflective surface is obtained.

[0101] In this ...

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Abstract

The invention relates to a wireless secure transmission method based on a random frequency array and an intelligent reflecting surface, and provides a multi-user system which comprises a transmitting end antenna, an intelligent reflecting surface controller and an intelligent reflecting surface which are connected in sequence, and specifically comprises the following steps: constructing a multi-user system model, selecting the maximum signal to leakage and noise ratio weighted sum of all expected users in the system as a target function of the system; by combining a corresponding convex optimization theory and applying an idea of alternate iterative optimization, a corresponding active beamforming vector and a passive beamforming matrix are obtained, i.e., a reflection matrix of the intelligent reflecting surface is obtained. Based on the random frequency array and the intelligent reflecting surface, safe transmission of a multi-user system can be achieved, and it is guaranteed that a private signal reaches the safety performance of an expected user and is not intercepted by an eavesdropping user.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a wireless security transmission method based on a random frequency array and an intelligent reflection surface. Background technique [0002] In recent years, the application of wireless communication has penetrated into every aspect of people's life, and the rapid development of mobile communication network has greatly changed people's way of life. With the surge of mobile data traffic in the fifth generation wireless communication system, the issue of secure transmission of information flow has attracted more and more attention. With the surge of data flow, the information transmitted in the wireless communication system also has a greater possibility of leakage and eavesdropping, so in order to ensure the security of information transmission, we also need to use new technologies to improve the physical layer of the new generation communication system safety pe...

Claims

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Application Information

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IPC IPC(8): H04K3/00H04B7/06
CPCY02D30/70
Inventor 胡锦松吕胜苹赖靓玲颜世豪陈由甲许志猛
Owner FUZHOU UNIV
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