无人机在植被与湖泊区域的传播信道：一阶与二阶统计分析
Unmanned Aerial Vehicle Propagation Channel over Vegetation and Lake Areas: First- and Second-Order Statistical Analysis
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中文总结 AI 辅助
本文通过无人机测量实验，在植被与湖泊环境中表征射频信道，识别最优信道模型，分析大尺度与小尺度衰落，并利用多普勒频率估算飞行器速度。
中文摘要 AI 辅助
近年来，使用无人机（UAV）提供互联网、货物配送和空中出租车等服务已成为现实。这些飞行器的使用要求控制站与无人机之间具备安全通信，而这需要对通信信道进行表征。本文旨在提出一种使用无人驾驶飞机采集数据的测量装置，用于在具有特定植被（卡廷加群落）和湖泊的传播环境中表征射频信道。本文的贡献如下：识别最能描述通信特性的通信信道模型；表征大尺度衰落效应，如路径损耗和对数正态阴影；表征小尺度衰落（多径和多普勒）；以及根据识别出的多普勒频率估算飞行器速度。
英文摘要
The use of unmanned aerial vehicles (UAV) to provide services such as the Internet, goods delivery, and air taxis has become a reality in recent years. The use of these aircraft requires a secure communication between the control station and the UAV, which demands the characterization of the communication channel. This paper aims to present a measurement setup using an unmanned aircraft to acquire data for the characterization of the radio frequency channel in a propagation environment with particular vegetation (Caatinga) and a lake. This paper presents the following contributions: identification of the communication channel model that best describes the characteristics of communication; characterization of the effects of large-scale fading, such as path loss and log-normal shadowing; characterization of small-scale fading (multipath and Doppler); and estimation of the aircraft speed from the identified Doppler frequency.
