无人蜂群分布式相干协作通信系统

Distributed Coordinated Coherent Communication System for UAV Swarm Application

为了解决无人(UAV)蜂群数据链系统受机载端发射功率及天线口径限制,空地通信距离受限的问题,提出了一种分布式相干协作通信系统的设计方法。基于信道反馈的校正补偿信息,蜂群节点可同时发送通信信号,在地面节点处实现相干协作信号增强。在实验室内搭建原型测试系统,通过理论分析和实测对比,验证了多节点相干协作传输的通信能力。4节点协作时,相干协作能力实测可增加10.58 dB。该方法使得在保持无人蜂群数据链端机及全向天线不变基础上,实现通信距离扩展、抗干扰能力提升变得可行。

In order to solve the problem of air-to-ground communication distance due to the limitation of transmitted power and antenna size in Unmanned Aerial Vehicle(UAV) swarm data link system,a method of distributed coordinated coherent communication system is proposed.Based on the adjusting and compensation of channel feedback,the UAV swarm nodes can transmit the communication signal simultaneously,and then the coherent received signal can be obtained in the ground node.A prototype system is built in the laboratory.Comparison of the theoretical analysis and measured data,the capacity of multi-node coordinated coherent transmission is verified.Experimental results show that the power gain is increased 10.58 dB when 4 nodes are coordinated.The proposed method makes it possible to expand communication distance and improve anti-jamming ability while the UAV swarm data link terminal and omnidirectional antenna remain unchanged.