直升机机载卫通系统抗旋翼遮挡方法研究

摘要

For manned/unmanned helicopter satellite communication system,the signal is shielded by rotor resulting in link interruption,a method of anti rotor shielding is proposed according to the different requirements of data rate and reliability for forward link and reverse link.The forward link uses time transmit diversity technique to ensure the reliability of data transmission;and the reverse link uses the way of based-on signal power detection to determine unobstructed range,and transmits data through unobstructed range,therefore the communication efficiency is improved.Simulation results show that the method can effectively resist the rotor shielding,the technique is feasible and effective,and has broad prospects for application.%针对有人/无人直升机卫星通信系统信号被旋翼遮挡导致链路中断的问题,根据对前向链路和返向链路数据速率、可靠性等方面的不同要求,分别提出一种对抗旋翼遮挡的方法.即前向链路采用时间发射分集技术,保证了数据传输的可靠性;返向链路采用基于信号功率的缝隙检测方法确定无遮挡区间,利用无遮挡缝隙进行数据回传,提高了通信效率.仿真结果表明,这种方法可以有效地对抗旋翼遮挡,技术方案可行有效,具有广阔的示范应用前景.