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首页> 外文期刊>IEEE Transactions on Vehicular Technology >Physical Layer Security of Multiuser Multirelay Hybrid Satellite-Terrestrial Relay Networks
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Physical Layer Security of Multiuser Multirelay Hybrid Satellite-Terrestrial Relay Networks

机译：多用户多中继混合卫星-地面中继网络的物理层安全性

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摘要

In this paper, we study the physical layer security of a downlink hybrid satellite-terrestrial relay network (HSTRN), where a multi-antenna satellite communicates with multiple terrestrial destinations via multiple cooperative relays in the presence of multiple eavesdroppers. We investigate the secrecy performance of the considered HSTRN by employing two classic cooperative protocols, namely, amplify-and-forward and decode-and-forward for two intercepting scenarios at eavesdroppers, i.e., non-colluding and colluding eavesdroppers. For both these cooperative protocols, we present opportunistic user-relay selection criteria and then derive novel and accurate expressions of the secrecy outage probability (SOP) by adopting Shadowed-Rician fading for satellite links and Nakagami-m fading for terrestrial links. Furthermore, in order to extract useful insights on the system design, we obtain the tractable asymptotic SOP expressions at high signal-to-noise ratio regime. Finally, we provide the numerical and simulation results to validate our analysis and highlight the impact of various channel/system parameters on the secrecy performance of the considered HSTRN.
机译：在本文中，我们研究了下行链路混合卫星-地面中继网络（HSTRN）的物理层安全性，其中多天线卫星在存在多个窃听者的情况下通过多个协作中继与多个地面目标进行通信。我们通过采用两种经典的协作协议（即针对窃听者的两个拦截场景的放大转发和解码转发）来研究所考虑的HSTRN的保密性能，即非冲突和共谋的窃听者。对于这两种协作协议，我们提出机会用户中继选择标准，然后通过对卫星链路采用阴影-里斯衰落和对地面链路采用Nakagami-m衰落来推导秘密中断概率（SOP）的新颖且准确的表达式。此外，为了提取有用的系统设计见解，我们获得了在高信噪比条件下易于处理的渐近SOP表达式。最后，我们提供数值和仿真结果以验证我们的分析，并强调各种通道/系统参数对所考虑的HSTRN的保密性能的影响。

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