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Physical layer safety communication method based on weak signal detection

A weak signal detection and physical layer security technology, applied in the field of wireless communication, can solve the problem of not considering the influence of the transmit power of the interferer

Inactive Publication Date: 2016-04-20
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the fact that the existing physical layer security communication method does not consider the influence of the interference party's transmission power, the present invention provides a physical layer security communication method based on weak signal detection

Method used

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  • Physical layer safety communication method based on weak signal detection
  • Physical layer safety communication method based on weak signal detection
  • Physical layer safety communication method based on weak signal detection

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Embodiment Construction

[0009] In order to better understand the present invention, the present invention will be further described in detail below through the accompanying drawings and examples.

[0010] Such as figure 1 As shown, the transmitter T of the legitimate user sends an information signal s(t) to the receiver R, and the jamming transmitter J sends a strong artificial noise signal n(t), the receiver R of the legitimate user and the receiver E of the illegal user The received signals are expressed as:

[0011] x ( t ) = P T h T R s ( t ) + P J h J R n ( t ) + ...

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Abstract

The invention discloses a physical layer safety communication method based on weak signal detection. The method comprises the following steps that a legal user transmitter sends an information signal to a legal user receiver while an interfering transmitter sends an artificial noise signal; and the legal user receiver adopts a chaos-based weak signal detection method to extract the information signal overwhelmed by the nose from a receiving signal according to prior information of the information signal. The method does not change the existing physical layer safety communication method and allows an interference party to send the artificial noise signal at very high power, so that wiretapping of an illegal user is effectively intervened and communication of the legal user is guaranteed to go on wheels; and the method is suitable for a wireless communication system without data encryption.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a physical layer security communication method based on weak signal detection. Background technique [0002] Information security is related to national territorial sovereignty and the safety of people's lives and property, and plays a very important role in daily production and life. Nowadays, the physical layer security of wireless communication has attracted more and more attention and attention. The wireless communication medium is open, and any illegal user may Eavesdropping on the information of legitimate users, thereby disrupting the normal communication of legitimate users. [0003] In the past, information security mainly started from computer network protocols and data encryption. In order to prevent information signals from being eavesdropped, many physical layer security communication models and methods have been proposed. The usual method is that the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/00
CPCH04W24/00Y02D30/70
Inventor 陈宏滨赵峰李春海苗彦涛陈泓渊常怡亮
Owner GUILIN UNIV OF ELECTRONIC TECH