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
CN107359892BActive Publication Date: 2019-07-16SOUTH CHINA UNIV OF TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2019-07-16

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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.
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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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