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Secure transmission scheme based on time reversal technology

A technology of time inversion and safe transmission, applied in security devices, transmission systems, transmission monitoring, etc., can solve the problems of unexplored time inversion technology and application of beamforming technology, etc.

Inactive Publication Date: 2019-02-22
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing research combines time reversal technology and beamforming technology, it does not explore the application of time reversal technology and beamforming technology in physical layer security

Method used

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  • Secure transmission scheme based on time reversal technology
  • Secure transmission scheme based on time reversal technology
  • Secure transmission scheme based on time reversal technology

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Embodiment Construction

[0101] In order to express the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation cases.

[0102] figure 1 The present invention's proposed downlink multi-user MISO eavesdropping channel model diagram specifically includes:

[0103] Aiming at the information leakage problem of the multi-user downlink, the present invention comprehensively considers the inter-antenna correlation and the channel state, takes maximizing the security capacity as the multi-user communication criterion, and models the system as a downlink MISO eavesdropping channel model. A security transmission scheme optimized by beamforming technology based on time reversal technology is proposed to reduce the risk of information being eavesdropped by eavesdropping users. The design idea of ​​the scheme is as follows: First, in a downlink multi-us...

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Abstract

Wireless communication depends on open free space, and an interception user may steal information in a communication process. Aiming at a problem of information leakage of a multi-user downlink, a secure transmission scheme based on a time reversal (TR) technology and optimized with a beam forming (BF) technology is provided. In the scheme, maximizing secure capacity is taken as a multi-user communication criterion, and a multi-input single-output (MISO) interception channel model is built. On one hand, a base station enhances signals in a specified direction through the beam forming technology, and sends needed signals for expected users; and on the other hand, since the time reversal technology is adaptive to environment, the signals of the base station all pass through a time reversal chamber before being transmitted, spatial and temporal focusing property of the time reversal chamber enables energy to be focused at a legal receiving party, and thus, secrecy performance is more excellent. Theoretical analysis and simulation results show that, compared with the existing physical layer security scheme, the scheme provided by the invention has higher secure capacity and lower bit error rate

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a safe transmission scheme based on time reversal technology. Background technique [0002] In recent years, physical layer technology has been continuously explored and innovated, and a large number of technical foundations for the study of secure transmission of physical layer information have been accumulated. Therefore, research on wireless physical layer security has attracted the attention of many research institutions and scholars, and has become a research hotspot in the field of wireless communication. Physical layer security transmission technology is a way to improve system security capacity, and ensuring the maximum security capacity in wireless transmission is one of the important goals of secure communication. The security capacity indicates the maximum rate at which the base station can safely transmit information to the desired user, and is an impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/391H04B7/06H04B17/336H04L27/34H04W12/00H04W12/03
CPCH04B7/0617H04B17/336H04B17/391H04L27/34H04W12/00
Inventor 李方伟汪苹张海波
Owner CHONGQING UNIV OF POSTS & TELECOMM
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