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Secrecy outage analysis for underlay cognitive radio networks over correlated channels

下垫式认知无线电网络在相关信道中的保密中断性能分析

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Abstract

This paper investigates the secrecy outage performance of underlay cognitive radio networks, in which a source in a secondary system transmits its confidential information to a legitimate destination in the presence of an eavesdropper. Specifically, the main (the source-to-destination) and eavesdropping (the sourceto- eavesdropper) channels are assumed to be correlated. Moreover, it is also assumed that the main channel and the channel from the source to the primary user’s receiver are correlated. Tight closed-form analytical expression for secrecy outage probability and the closed-form analytical expression for the probability of non-zero secrecy capacity are derived and validated by simulation results when the interference temperature limit is comparably large.

摘要

创新点

  1. 1)

    在相关瑞利衰落信道中, 我们推导出保密中断概率的紧凑闭合表达式. 从仿真结果中, 我们发现当干扰温度阀值相对较大时, 所推导出的近似表达式是准确的.

  2. 2)

    同时, 我们也推导出非零安全容量概率的解析表达式。

中文摘要

本文研究了下垫式认知无线电网络的保密中断性能. 在此系统中, 次级系统的信源发送保密信息到合法用户, 同时此信息被窃听者窃听. 在考虑了主信道 (信源到信宿) 和窃听信道 (信源到窃听者) 具有一定的相关性和主信道与信源到主用户接收端的信道也具有相关性的场景下, 推导出保密中断概率和非零安全容量概率的紧凑闭合表达式. 同时, 用仿真结果验证了在干扰温度阀值相对较大时所推导的表达式的正确性.

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Correspondence to Gaofeng Pan.

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Zhang, J., Zhao, H. & Pan, G. Secrecy outage analysis for underlay cognitive radio networks over correlated channels. Sci. China Inf. Sci. 60, 022307 (2017). https://doi.org/10.1007/s11432-015-0973-8

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Keywords

  • cognitive radio networks
  • correlated fading channels
  • probability of non-zero secrecy capacity
  • secrecy outage probability

关键词

  • 认知无线电网络
  • 相关衰落信道
  • 非零安全容量概率
  • 保密中断概率