Secrecy Rate of Two-Hop AF Relaying Networks with an Untrusted Relay

被引：12

作者：

Zhou, Nanrun ^{[1
,2
]}

Chen, Xun ^{[1
,2
]}

Li, Chisheng ^{[1
]}

Xue, Zhi ^{[2
]}

机构：

[1] Nanchang Univ, Dept Elect Informat Engn, Nanchang 330031, Peoples R China

[2] Shanghai Jiao Tong Univ, Shanghai Key Lab Integrate Adm Technol Informat S, Shanghai 200240, Peoples R China

来源：

WIRELESS PERSONAL COMMUNICATIONS | 2014年 / 75卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Relaying protocol; Physical layer security; Amplify-and-forward mode; Untrusted relay; Cooperative communication; WIRE-TAP CHANNEL; PERFORMANCE;

D O I：

10.1007/s11277-013-1351-1

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

Two cooperative communication protocols, two-way and one-way half-duplex relayings, are investigated and then compared in the amplify-and-forward (AF) mode. The relay is assumed to play the roles of eavesdropper and relay (i.e., an untrusted relay). With a fair power constraint at each node, the secrecy rate of the one-way relaying protocol is proved to be zero strictly. For the two-way relaying protocol, the signal-to-noise ratio (SNR) threshold is derived, above which the secrecy rate is non-zero. Defining a parameter, namely mistrust level, and non-zero secrecy rate can be achieved for the one-way relaying protocol in certain range of the mistrust level at high SNR. With a fair total power constraint, no matter how unreliable the relay is, the two-way AF half-duplex relaying protocol is proved to be a better choice under high SNR.

引用

页码：119 / 129

页数：11

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