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Wireless Communication Network Combined Signal Feedback and Artificial Noise Physical Layer Security Communication Method

A wireless communication network and physical layer security technology, applied in wireless communication, secure communication, security devices, etc., can solve problems such as deciphering legitimate users and unreliable helpers

Active Publication Date: 2019-07-19
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In practice, there is probably no external helper, perhaps the helper itself is unreliable, and it may decipher the legitimate user's information

Method used

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  • Wireless Communication Network Combined Signal Feedback and Artificial Noise Physical Layer Security Communication Method
  • Wireless Communication Network Combined Signal Feedback and Artificial Noise Physical Layer Security Communication Method
  • Wireless Communication Network Combined Signal Feedback and Artificial Noise Physical Layer Security Communication Method

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Embodiment Construction

[0044] The invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it is not used as a basis for any limitation on the invention.

[0045]The wireless communication network joint signal feedback and artificial noise physical layer security communication method of the present invention firstly provides the system model of the present invention, the model diagram is shown in the appendix figure 1 Shown:

[0046] There are three nodes in the system, a sender, a legal receiver and an eavesdropper. All devices have only a single antenna. The eavesdropping end can receive the signal sent by the sending end to the legal receiving end, and can also receive the signal fed back to the sending end by the legal receiving end. h AB , h BA , h AE and h BE . Among them, h AB and h BA is a cyclic symmetric complex Gaussian channel with zero mean and unit variance, and undergoes quasi-static fading, that is, the channel re...

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Abstract

The invention discloses a physical layer safe communication method designed by combining signal feedback and artificial noise in a wireless communication network. The method comprises a first stage that a sending end sends information needing to be kept secret to a legal receiving end; a second stage that after the legal receiving end receives the information, a certain amount of artificial noise is mixed in the received information, and the mixed signal is fed back to the sending end; and a third stage that the sending end sends feedback signal to the receiving end. The legal receiving end knows the artificial noise mixed in the second stage, so that the legal receiving end can eliminate the artificial noise; an eavesdropping end cannot eliminate the noise, so that the performance is weakened by the artificial noise; and the safe communication between the sending end and the receiving end is realized. According to the scheme, the safe communication between the legal devices can be realized under the condition that the legal communication devices have no antenna, no external helper and no any channel information of the eavesdropping end. The method has superiority in the communication safety aspect.

Description

technical field [0001] The invention belongs to the field of wireless communication and relates to a safe transmission scheme, in particular to a physical layer safe communication scheme designed in combination with signal feedback and artificial noise in a wireless communication network. Background technique [0002] Due to the broadcast characteristics of wireless communication, the communication between devices is easy to be eavesdropped by eavesdroppers. Although the traditional physical layer security scheme can effectively improve communication security to a certain extent, it still has some shortcomings. For example, 1. The transmitting end knows the instantaneous channel information or statistical channel information of the eavesdropping end. But in fact, for a completely passive eavesdropper (that is, the eavesdropper does not send any information, but only receives information), it is difficult for a legitimate user to obtain its channel information. Second, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W12/02H04K1/02H04L25/03
CPCH04K1/02H04L25/03993H04W12/02
Inventor 任品毅贺宏亮孙黎王熠晨杜清河
Owner XI AN JIAOTONG UNIV
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