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Physical layer safety communication method and device based on time reversal technology

A physical layer security, time reversal technology, applied in the field of communication, can solve the problem of being eavesdropped

Active Publication Date: 2018-10-09
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the airspace AN signal cover technology is used for secure communication, there is still the risk of being eavesdropped

Method used

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  • Physical layer safety communication method and device based on time reversal technology
  • Physical layer safety communication method and device based on time reversal technology
  • Physical layer safety communication method and device based on time reversal technology

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Embodiment Construction

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described implementation Examples are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] The following firstly introduces the physical layer security communication method based on the time reversal technology according to an embodiment of the present invention.

[0031] The physical layer security communication method based on the time reversal technology provided by the embodiment of the present invention can be applied to ...

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Abstract

The embodiment of the invention provides a physical layer safety communication method and device based on time reversal technology. The method is applied to a signal sending end in a communication system, and comprises the following steps: obtaining a noise signal with the preset time point of 0 by using the time reversal technology according to channel information of each path communicated with atarget receiving end; overlapping the noise signal into a to-be-transmitted signal to obtained an encrypted signal; and sending the encrypted signal to the target receiving end. When the target receiving end collects the encrypted signal at the preset time point, the noise in the encrypted signal is 0; since the channel information of the illegal receiving end is different from the target receiving end, the noise signal in the encrypted signal cannot be 0 whenever the encrypted signal is collected; therefore, the illegal receiving end cannot identify the to-be-transmitted signal from the collected encrypted signal due to the interference of the noise signal, and the safety communication under the cover of the time domain AN signal is realized.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a physical layer security communication method and device based on time reversal technology. Background technique [0002] With the development of communication technology, people can transmit all kinds of information more conveniently through wireless communication systems without being limited by the area of ​​traditional wired communication systems. Wireless communication technology transmits communication information through electromagnetic waves, and electromagnetic waves may be collected by eavesdroppers who do not belong to the communication parties, so there is a risk of communication information being eavesdropped by eavesdroppers. For this reason, the characteristics of the physical layer of the wireless communication system are usually used for secure communication to prevent the risk of eavesdropping. [0003] Commonly used physical layer security comm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W12/02H04L9/08H04K1/02
CPCH04K1/02H04L9/0875H04W12/02
Inventor 李娜李思刘尊宁徐瑨陶小峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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