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A Method of Realizing Physical Layer Security Based on Distributed Antenna System

A distributed antenna and physical layer security technology, applied in diversity/multi-antenna systems, radio transmission systems, transmission modification based on link quality, etc., can solve problems such as threats to security processing capabilities, achieve good security performance, improve The effect of safety capacity and applicability improvement

Active Publication Date: 2019-07-16
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional information security is based on key encryption and identity authentication methods used by high-level information sources. Its security effectiveness mainly depends on the computational complexity of cracking cryptography methods, which requires both parties to have the same or associated keys. , and its security is threatened by the increasing processing power of modern computers

Method used

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  • A Method of Realizing Physical Layer Security Based on Distributed Antenna System
  • A Method of Realizing Physical Layer Security Based on Distributed Antenna System
  • A Method of Realizing Physical Layer Security Based on Distributed Antenna System

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Embodiment

[0040] The method for protecting information security transmission in the distributed antenna system described in this embodiment is a solution based on physical layer security technology, which reduces the signal-to-noise ratio of received signals by interfering with potential eavesdroppers in the network, and combines Beamforming technology sends confidential information to legal users to realize the security protection of useful information transmitted in the network and prevent it from being eavesdropped during wireless transmission. In the absence of prior knowledge such as the position of the eavesdropper and its channel characteristics, interfere with all positions where the eavesdropper may be able to intercept information, reduce the signal-to-noise ratio of the received signal, and increase the number of legitimate users in the network as much as possible. Safe capacity when communicating. In addition, in order to confuse eavesdroppers, remote radio units in other lo...

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Abstract

The invention discloses a method for realizing physical layer security based on a distributed antenna system. The method includes: a legal user sends an uplink reference signal through a common channel; radio remote units receive signals and obtain downlink channel coefficients; and according to a signal to noise ratio of the received signals and a signal modulation mode, the channel coding is carried out for a legal user information transmission channel; the radio remote unit in a circular area is selected as a sending unit of the legal user; the radio remote unit performs space-domain precoding according to the obtained legal user channel information, the signal energy is gathered, and an information signal is sent; an artificial interference signal is sent while the information signal is sent; and after the legal user receives the information signal, the signal demodulation is first carried out, and then correct transmission information is obtained through channel decoding. According to the invention, the transmission information of the legal user can be effectively protected without knowing the position of an eavesdropper and eavesdropping channel characteristics, and the confidentiality and reliability of the transmission are maximized.

Description

technical field [0001] The invention relates to the technical field of information security in mobile communication, in particular to a method for realizing physical layer security based on a distributed antenna system. Background technique [0002] With the wide application of wireless communication technology in civilian and military fields, people have put forward higher requirements for the safety and security of information communication. In recent years, with the rise of the 5G concept, in order to achieve wider signal coverage and faster data transmission rates, large-scale distributed antenna systems have begun to emerge. Due to the introduction of more radio remote units, the network of distributed antenna system is more open, the structure is more complex, and in a sense, the degree of freedom is greater, which allows people to obtain better service functions in it . [0003] In a wireless communication system, due to the openness of wireless channels, signals ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/40H04B7/024H04B7/0404H04B7/0456H04B17/336H04L1/00H04L1/06
CPCH04B1/40H04B7/02H04B7/0404H04B7/0456H04B17/336H04L1/0009H04L1/0668
Inventor 冯穗力韩民钊唐玮俊张远见胡应添
Owner SOUTH CHINA UNIV OF TECH
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