In this paper, we analyze the performance of a reconfigurable intelligent surface (RIS)-assisted unmanned aerial vehicle (UAV) wireless system that is affected by mixture-gamma small-scale fading, stochastic disorientation, and misalignment, as well as transceivers hardware imperfections. First, we statistically characterize the end-to-end channel for both cases, i.e., in the absence as well as in the presence of disorientation and misalignment, by extracting closed-form formulas for the probability density function (PDF) and the cumulative distribution function (CDF). Building on the aforementioned expressions, we extract novel closed-form expressions for the outage probability (OP) in the absence and the presence of disorientation and misalignment as well as hardware imperfections. In addition, high signal-to-noise ratio OP approximations are derived, leading to the extraction of the diversity order. Finally, an OP floor due to disorientation and misalignment is presented.
翻译:在本文中,我们分析了可重新配置的智能表面(RIS)辅助无人驾驶飞行器(UAV)无线系统的性能,这种系统受到混合物-伽马小型衰减、沙沙失常和不匹配以及收发机硬件缺陷的影响。首先,我们从统计角度对两种情况,即在不存在和存在偏差和不匹配的情况下,对终端至终端通道的性能进行了定性,方法是提取概率密度函数(PDF)和累积分布函数(CDF)的封闭式公式。在上述表达方式的基础上,我们为在不存在和存在偏差和不匹配以及硬件缺陷的情况下的失常概率(OP)提取了新型封闭式表达方式。此外,还得出了高信号-噪音比率的OP近似值,从而导致多样性的提取。最后,还介绍了由于偏差和错配错的OP楼层。