多中继与多用户选择的中继系统安全性能分析

doi:10.11959/j.issn.1000-0801.2019153

Abstract

Abstract:

The exact expressions for the non-zero secrecy capacity probability,secrecy outage probability of AF relay systems with transmit antenna selection and receive maximal ratio combining and its asymptotic secrecy outage probability at high signal to noise ratios over Rayleigh fading channel were derived respectively.The numerical results of the non-zero secrecy capacity probability and secrecy outage probability of AF relay systems with multi-relay and multi-user selection match well with their corresponding simulations,which proves the correctness of the above theoretical analysis.The analysis result of the asymptotic secrecy outage probability of AF relay systems with multi-relay and multi-user selection indicates that its secrecy diversity gain is the minimum value between the product of the number of transmit antennas at source,the number of receive antennas at the optimal relay node,and the number of relay nodes,and the product of the number of transmit antennas at the optimal relay node,the number of receive antennas at the optimal destination node,and the number of destination nodes,which is independent of the eavesdropper channel.

Key words: transmit antenna selection, maximal ratio combining, amplify-and-forward, relay selection, physical layer security

CLC Number:

TN918

Tingjie REN,Guangqiu LI,Ying CHENG. Secure performance analysis of relay systems with multi-relay and multi-user selection[J]. Telecommunications Science, 2019, 35(8): 111-119.

Figures/Tables 5

	图2	图3	图4
S发射天线数N₁	2	{1,2}	2
R_m收发天线数N₂	{1,2}	{1,2}	{1,2}
D_n接收天线数N₃	{1,4}	2	{1,2}
E接收天线数N₄	2	1	{1,2}
中继节点数M₁	2	{1,2}	2
目的节点（用户）数M₂	{1,2}	1	{1,2}
目标安全速率R_S/(bit·(s·Hz)^-1)	1	1	1
窃听信道平均信噪比 ${\bar{γ}}_{3} / d B$	{10,15}	5	5

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