The use of multiple source nodes with wireless backhaul is considered for secrecy enhancement through source node selection in future wireless networks. The ergodic secrecy rate (ESR) of optimal source node selection in the presence of multiple eavesdroppers over independent non-identically distributed (INID) Rayleigh fading channels is evaluated in closed-form. At high signal-to-noise ratio (SNR), the ESR is expressed as a simple weighted summation where each term relates to the contribution of an individual source and eavesdropper. An asymptotic analysis shows the effect of the system parameters and backhaul reliability on the performance. The proposed method can provide a generalized solution for the ESR of optimal transmit antenna selection in multi-antenna systems, optimal source node selection, and optimal relay selection with or without unreliable backhaul.

中文翻译：

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不可靠回程多源系统最优源选择的遍历保密率


考虑使用具有无线回程的多个源节点，以通过未来无线网络中的源节点选择来增强保密性。在独立非同分布 (INID) 瑞利衰落信道上存在多个窃听者的情况下，最优源节点选择的遍历保密率 (ESR) 以封闭形式进行评估。在高信噪比 (SNR) 下，ESR 表示为简单的加权求和，其中每一项都与单个源和窃听者的贡献相关。渐近分析显示了系统参数和回程可靠性对性能的影响。所提出的方法可以为多天线系统中最优发射天线选择、最优源节点选择以及有或没有不可靠回程的最优中继选择的ESR提供通用解决方案。