Secure Transmission with Optimal Power Allocation in Untrusted Relay Networks

被引：128
|
作者：
Wang, Lifeng [1 ]
Elkashlan, Maged [1 ]
Huang, Jing [2 ]
Tran, Nghi H. [3 ]
Duong, Trung Q. [4 ]
机构：
[1] Queen Mary Univ London, London, England
[2] Univ Calif Irvine, Irvine, CA USA
[3] Univ Akron, Akron, OH 44325 USA
[4] Queens Univ Belfast, Belfast, Antrim, North Ireland
来源：
IEEE WIRELESS COMMUNICATIONS LETTERS | 2014年 / 3卷 / 03期
关键词：
Cooperative jamming; optimal power allocation; physical layer security; untrusted relay;
D O I：
10.1109/WCL.2014.031114.140018
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
We consider the problem of secure transmission in two-hop amplify-and-forward untrusted relay networks. We analyze the ergodic secrecy capacity (ESC) and present compact expressions for the ESC in the high signal-to-noise ratio regime. We also examine the impact of large scale antenna arrays at either the source or the destination. For large antenna arrays at the source, we confirm that the ESC is solely determined by the channel between the relay and the destination. For very large antenna arrays at the destination, we confirm that the ESC is solely determined by the channel between the source and the relay.
引用
收藏
页码：289 / 292
页数：4
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