地面干扰随机场中无人机单元上行性能分析
Uplink Performance Analysis of a Drone Cell in a Random Field of Ground Interferers
摘要：
空中基站是一种很有前途的技术，以增加现有的通信网络的能力。然而，现有的分析框架没有充分表征地面干扰对空中基站的影响。为了解决这个问题，我们模拟了来自空中链路上共存的地面网络的干扰的影响，这可能是由无人机基站服务的空中小区的上行链路。通过考虑地面干扰的泊松场，我们表征了无人机所经历的总干扰。该结果包括无人机天线方向图的影响、高度相关阴影以及各种类型的环境。我们表明，无人机在高空从更好的视线（LoS）中获得的好处被来自地面的干扰的高度脆弱性所抵消。然而，通过推导链路覆盖概率和传输速率，我们表明，无人机基站仍然是一种很有前途的技术，如果整个系统是适当的尺寸根据给定的密度和发射功率的发射机。特别是，我们的研究结果说明了如何通过定义最佳无人机高度和信号干扰比（SIR）要求来最大化这种网络的好处。
英文摘要：
Aerial base stations are a promising technology to increase the capabilities of the existing communication networks. However, the existing analytical frameworks do not sufficiently characterize the impact of ground interferers on the aerial base stations. In order to address this issue, we model the effect of interference coming from the coexisting ground networks on the aerial link, which could be the uplink of an aerial cell served by a drone base station. By considering a Poisson field of ground interferers, we characterize the aggregate interference experienced by the drone. This result includes the effect of the drone antenna pattern, the height-dependent shadowing, and various types of environment. We show that the benefits that a drone obtains from a better line-of-sight (LoS) at high altitudes is counteracted by a high vulnerability to the interference coming from the ground. However, by deriving the link coverage probability and transmission rate we show that a drone base station is still a promising technology if the overall system is properly dimensioned according to the given density and transmission power of the interferers. Particularly, our results illustrate how the benefits of such network is maximized by defining the optimal drone altitude and signal-to- interference (SIR) requirement.
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