无人机衰落信道扩频通信性能研究

无人机的广泛应用吸引了越来越多的关注,组成无人机系统的关键部分是无人机和地面控制站的通信系统。重点关注中程无人机的通信链路,阐述和解决了扩频技术在无人机通信系统中的应用,分析中程无人机信道的衰落模型,理论推导了扩频通信在该无人机信道中误码概率的上边界函数,建立了衰落信道的QPSK直接扩频系统的MonteCarlo仿真模型,得到的该信道下扩频通信的误码率仿真结果与理论值相吻合,对于设计中程无人机系统,改善无人机通信数据链有效性和可靠性具有重要意义。

Study of the performance of spread spectrum communicationunder fanding UAV channel

Within the last years, unmanned aerial vehicles (UAVs) for a wide variety of applications have enjoyed growing in-terest. One of the most critical components of an UAV system is the datalink between the UAV itself and the ground control sta-tion. This paper special emphasis is the datalink of a medium-range UAV. Solved the application of spread spectrum techniques in UAV fading channel. A model of UAV fading channel is analyzed. On the basis of an analysis of the channel characteristics, the upper bound function of error probability of spread spectrum communication system is derived in the UAV channel. The method of monte carlo simulation is applied to it and the system performance is studied. It has significance to improve validity and reliability of the UAV communication channel.