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Relay physical layer safe transmission method

A technology of physical layer security and transmission method, which is applied in the field of relay physical layer security transmission, and can solve the problems of full-duplex transmission of strong self-interference signals and the like

Active Publication Date: 2016-10-26
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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AI Technical Summary

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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  • Relay physical layer safe 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 level safe transmission method and belongs to the field of communication. According to the invention, a relay node is, while under a full duplex working mode, is configured with a plurality of antennas, and adopts decode-and-forward protocol. The method designs a pre-coded array to be an artificial noise, and allows the relay node to transmit a hybrid signal of an expectation signal and the artificial noise to an object node at each time slot. A bugging node can bug the hybrid signal. The object node can eliminate the designed artificial noise from the hybrid signal so as to decode the expectation signal, while the bugging node fails to do the decoding. According to the invention, the method also derives and acquires the safety rate of the system, acquires the optimal power allocation polity between the expectation signal and the artificial noise. According to the invention, the method can effectively deal with bugging behavior and explicitly increase safety property of the system.

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 ...

Claims

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Application Information

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Patent Type & Authority Applications(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
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