Secure Transmission with Optimal Power Allocation in Untrusted Relay Networks
Secure Transmission with Optimal Power Allocation in Untrusted Relay Networks
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DOI：
10.1109/wcl.2014.031114.140018
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发表时间：
2014-03
影响因子：
6.3
通讯作者：
Lifeng Wang;M. Elkashlan;Jing Huang;N. Tran;T. Duong
中科院分区：
文献类型：
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作者：
Lifeng Wang;M. Elkashlan;Jing Huang;N. Tran;T. Duong
研究了两跳放大转发不可信中继网络的安全传输问题。我们分析了遍历保密容量（ESC），并提出了紧凑的ESC在高信噪比制度的表达式。我们还研究了在源或目的地的大规模天线阵列的影响。对于源处的大型天线阵列，我们确认ESC仅由中继站和目的地之间的信道确定。对于非常大的天线阵列在目的地，我们确认，ESC是完全由源和中继之间的通道。
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.