无人机中继广播通信系统航迹优化方法

Trajectory optimization method for the UAV relaying broadcast communication system

为了提高固定翼无人机中继广播通信系统链路传输的连通性,提出中继无人机航迹优化方法.首先分析了无人机中继广播通信系统单用户节点的中断概率近似计算公式,并以此为基础推导出了服务区域内所有用户节点平均中断概率的近似计算公式;然后基于服务区域内用户节点平均中断概率最小化准则提出了中继无人机的航迹优化方法,并进一步给出了最优航迹下单个用户节点的精确中断概率计算公式;最后通过计算机仿真验证了所提出方法的有效性.

In order to improve the connectivity of the fixed-wing unmanned aerial vehicle （UAV） relayingbroadcast communication system, a UAV trajectory optimization method is proposed. First, the approximate expression for the outage probability for a single user node in the UAV broadcast communication system isobtained. Based on this, the approximate calculation formula for the average outage probability for all user nodes inthe service area is deduced. Then, the trajectory optimization method is given based on the criterion of minimizing the average outage probability of all user nodes in the service area. outage probability for the single user node is derived to evaluate the system performance. Finally, the validity ofthe proposed scheme is proved by computer simulation.