天地一体化网络中无人机通信链路选择策略研究

摘要

本文在研究无人机通信多种信道模型和特征的基础上，提出了一种基于天地一体化网络的无人机通信链路选择策略。该策略通过分析不同飞行环境下无人机通信链路影响因素选择最佳通信链路，解释了无人机系统中不同通信链路的适用场景，并根据所提出的策略，设计了一种多无人机在近地面观测站的编队飞行方式。仿真研究了基于该策略的多无人机编队飞行时通信链路的误码率性能，以及多普勒频移、传输时延和阴影衰落等影响因素。研究结果表明无人机在长时间多场景飞行过程中，根据所提出的策略切换不同的通信链路能够将误码率保持在满足通信需求的水平。%This paper proposes a communication link selection strategy in the earth integrated network, based on a variety of channel models and features of UAV Communication. The strategy is to select the best communication link through analyzing the influence factors of UAV communication links under different flight conditions, explain the ap-plication scenarios of different communication links in the UAV system, and propose a formation flying mode of mul-ti-UAVs in the near surface observation station. Simulated and studied the BER performance of the communication link in multi-UAVs formation flight from this strategy, and the influence factors such as Doppler shift, transmission delay shadow fading, etc. The results show that different communication links can be switched to keep the bit-error-rate at the level of the communication requirements during long time multi-scene flight according to the proposed strategy.