基于飞行轨迹的无人机通信信道仿真

Simulation of UAV Communication Channel Based on Flight Trajectory

通过分析无人机之间无线链路的传播损耗、多普勒频率和多径时延等特征参数,提出一种基于三射线的无人机通信信道模型,并给出了无人机飞行轨迹在不同坐标系中的转换公式及已知飞行轨迹求解信道模型参数的方法。最后针对两种不同的典型飞行场景,对无人机通信链路的多径时延、传输损耗及多普勒频率算法进行了仿真验证,并获得了基于飞行轨迹的无人机空空数据链信道模型。该模型对无人机数据链系统参数选取、物理层算法设计和性能分析等具有重要意义。

By analyzing the wireless communication hnk＇ s features between two unmanned aerial vehicles （UAV） such as propagation loss, Doppler frequency and multipath delay, a new dynamic channel model based on three- rays is proposed. Then, the transformation method for UAV＇s flight trajectory between different coordinate sys- tems is given and how to get the dynamic channel features from the specified flight trajectories is discussed. Fi- nally, two typical simulation scenarios are used to validate the proposed method in calculating muhipath delay, propagation loss and Doppler frequency and the dynamic air-air data link channel between UAVs is simulated. These results are very helpful for UAV＇s data link system parameters selection, physical layer algorithm design and system performance evaluation.