Broad-band satellite communication is an indispensable method to provide seamless connectivity for people especially in remote areas. This paper analyzes the performance of the forward link of a multiuser satellite system operating in Ka band, where a gateway delivers signal to a satellite that forwards the amplified signal to multiple users on the ground. By assuming that satellite links experience double lognormal fading due to rain attenuation and taking the effects of antenna pattern and path loss into account, we first exploit the opportunistic user scheduling (OUS) scheme to obtain the maximal output signal-to-noise ratio (SNR) expression of the satellite system. Then, the analytical expressions for both outage probability (OP) and ergodic capacity (EC) of the considered satellite system are derived. Finally, simulation results demonstrate the validity of the theoretical analysis and the superiority of the OUS scheme in comparison with round-robin scheme.

中文翻译：

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多用户卫星通信系统前向链路性能分析

宽带卫星通信是为人们尤其是偏远地区的人们提供无缝连接的不可或缺的方法。本文分析了工作在 Ka 频段的多用户卫星系统前向链路的性能，其中网关将信号传送到卫星，卫星将放大的信号转发给地面上的多个用户。通过假设卫星链路由于雨衰而经历双对数正态衰落，并考虑天线方向图和路径损耗的影响，我们首先利用机会用户调度（OUS）方案获得最大输出信噪比（SNR） ) 卫星系统的表达。然后，推导出所考虑的卫星系统的中断概率（OP）和遍历容量（EC）的解析表达式。最后，