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A relay physical layer security transmission method

A technology of physical layer security and transmission method, applied in the field of relay physical layer security transmission, can solve problems such as strong self-interference signals in full-duplex transmission, and achieve the effect of resisting eavesdropping behavior and improving security performance

Active Publication Date: 2018-10-26
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

FDR overcomes the inherent spectral efficiency of HDR, but there is a relatively strong self-interference signal in full-duplex transmission

Method used

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  • A relay physical layer security transmission method
  • A relay physical layer security transmission method
  • A relay physical layer security transmission method

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Embodiment Construction

[0036] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the implementation process of how to apply technical means to solve technical problems and achieve corresponding technical effects in the present invention. The embodiments of the present application and the various features in the embodiments can be combined with each other under the premise of no conflict, and the formed technical solutions are all within the protection scope of the present invention.

[0037] figure 1It is a model diagram of the physical layer security of the relay system in the embodiment of the present invention. The relay system includes a single-antenna source node S, a M-antenna relay node R, a single-antenna eavesdropping node E, and a single-antenna destination node D; M is an integer greater than 1. Assume that all channels experience block fading, that is, the chann...

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Abstract

The invention provides a relay physical layer security transmission method, which belongs to the communication field. The relay node of the present invention works in a full-duplex mode, is equipped with multiple antennas, and adopts a decoding and forwarding protocol. The present invention designs a precoding matrix as artificial noise, so that the relay node sends the mixed signal of expected signal and artificial noise to the destination node at the same time in each time slot. An eavesdropping node can eavesdrop on the mixed signal. The destination node can remove the designed artificial noise from the mixed signal to decode the desired signal, but the eavesdropping node cannot do this. The invention also deduces and obtains the safe rate of the system, and obtains the optimal power distribution strategy between the expected signal and the artificial noise. Through the method of the invention, the eavesdropping behavior can be effectively resisted, and the security performance of the system can be significantly improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a relay physical layer security transmission method. Background technique [0002] The application of physical layer security in wireless communication has attracted considerable attention recently, because from the point of view of information theory, it can prevent eavesdropping without encrypting the upper layer data. With the deepening of the research on physical layer security, the research model becomes more complex, and the physical layer security of the relay system is one of the hot spots in recent years. [0003] Cooperative relay communication is one of the effective ways to increase the security rate. Cooperative relaying (CR) can enhance the security performance from the source node to the destination node, while cooperative jamming (CJ) jams the eavesdropping node through artificial noise (AN). The relevant literature proposes a mixed CR and CJ scheme, and allocates the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04K3/00H04W12/00H04W12/122
CPCH04K3/825H04W12/00Y02D30/70
Inventor 王强齐航王怡杨丽娜董敏华韦伟胡鑫黄健欧
Owner BEIJING UNIV OF POSTS & TELECOMM