高速移动下飞行器稳定通信技术研究

Research on High Speed Vehicle Stable Communication Technology

飞行器在高速飞行时,与地面站或其他飞行器径向之间存在高速相对运动,致使接收信号带有极大的多普勒频偏及多普勒一次变化率。大动态多普勒给现有通信传输的稳定性带来巨大挑战,进而导致信息正确解调和飞行器执行任务的失败,因此亟待研究高速移动环境下的稳定通信技术。通过分析新作战模式对高速移动通信系统的能力需求,对飞行器高速移动通信的信道衰落特征进行研究。在此基础上,针对PCM-FM调制方法抗多普勒效应进行研究,进一步基于惯导提供的信息,提出飞行器高速移动通信的多普勒估计算法,通过仿真结果分析,该传输技术能够有效提升飞行器通信的稳定性。

When high speed vehicle is flying at high speed,there is high speed relative motion between ground station and other aircraft’s radial,so the receiving signal has great Doppler frequency deviation and Doppler change rate.Large dynamic Doppler brings great challenges to the stability of communication transmission,which leads to the correct demodulation of information and the failure of aircraft to perform tasks.Therefore,it is urgent to study the stable communication technology in high speed mobile environment.In this paper,the capability requirement of the new combat mode to the high-speed mobile communication system is analyzed,and the channel fading characteristics of the high-speed mobile communication are studied.On this basis,the anti-Doppler effect of pcm-fm modulation method is studied.Based on the information provided by the inertial navigation system,the Doppler estimation algorithm of the vehicle high-speed mobile communication is proposed.The simulation results show that the communication stability can be improved by this transmission technology.