This paper studies an unmanned aerial vehicle (UAV) based intelligent reflecting surface (IRS) assisted low altitude passive aerial relaying system. This ensures that more users can be served with better wireless channels. The flexibility of the UAV-based relay carrying the IRS can passively provide better signal-to-noise ratio (SNR) to compensate the performance degradation at the edge of cells or in the period of heavy traffic. In particular, the UAV-based IRS can generate an equivalent line-of-sight (ELoS) channel to transform the conventional Rayleigh fading channel into a Rician fading channel, which will significantly improve the performance of urban mobile communications. Closed-form expression for the outage is derived, and numerical results are presented to demonstrate the performance of the proposed UAV-IRS passive relaying scheme.

本文研究了一种基于无人机（UAV）的智能反射面（IRS）辅助低空无源空中中继系统。这样可以确保更好的无线频道可以服务于更多用户。带有IRS的基于UAV的中继的灵活性可以被动地提供更好的信噪比（SNR），以补偿小区边缘或繁忙时段的性能下降。特别是，基于UAV的IRS可以生成等效视线（ELoS）信道，以将传统的Rayleigh衰落信道转换为Rician衰落信道，这将显着提高城市移动通信的性能。推导了停运的闭式表达式，并给出了数值结果，以证明所提出的UAV-IRS无源中继方案的性能。