In this article, we consider an overlay satellite-terrestrial network (OSTN) where an opportunistically selected terrestrial Internet-of-Things (IoT) network assists the primary satellite communications as well as accesses the spectrum for its own communications under hybrid interference received from extra-terrestrial sources (ETSs) and terrestrial sources (TSs). Herein, the IoT network adopts power-domain multiplexing to amplify-and-forward the superposed satellite and IoT signals. Considering a unified analytical framework for shadowed-Rician fading with integer/non-integer Nakagami- ${m}$ parameter for satellite and interfering ETSs links along with the integer/non-integer Nakagami- ${m}$ fading for terrestrial IoT and interfering TSs links, we derive the outage probability (OP) of both satellite and IoT networks. Further, we derive the respective asymptotic OP expressions to reveal the diversity order of both satellite and IoT networks at high signal-to-noise ratio (SNR). We show that the proposed OSTN with adaptive power-splitting factor benefits the IoT network while guaranteeing certain quality-of-service (QoS) of satellite network. We verify the numerical results by simulations.

中文翻译：

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基于物联网的重叠卫星地面网络在干扰下的性能分析

在本文中，我们考虑覆盖卫星-地面网络 (OSTN)，其中机会主义选择的地面物联网 (IoT) 网络协助主要卫星通信，并在从外部接收到的混合干扰下访问自己的通信频谱。 - 地面源 (ETS) 和地面源 (TS)。其中，物联网网络采用功率域复用对叠加的卫星和物联网信号进行放大转发。考虑使用整数/非整数 Nakagami 的阴影-Rician 衰落的统一分析框架 ${m}$ 卫星和干扰 ETS 链路的参数以及整数/非整数 Nakagami- ${m}$ 地面物联网衰落和干扰 TS 链路，我们推导出卫星和物联网网络的中断概率 (OP)。此外，我们推导出各自的渐近 OP 表达式，以揭示卫星和物联网网络在高信噪比 (SNR) 下的分集顺序。我们表明，所提出的具有自适应功率分配因子的 OSTN 有利于物联网网络，同时保证卫星网络的某些服务质量 (QoS)。我们通过模拟验证了数值结果。