超远距离数据链信息传输技术在无人机上的应用

Application of Information Transmission Technocogy of Ultra Long Distance Data Link in UAV

针对目前输电线路巡线无人机通信距离短的问题,提出一种无人机超远距离数据链信息实时传输技术。无人机超距离通信数据链平台基于软件无线电技术、自适应编码调制技术及天线自动对准技术,应用MAC(物理)层设计、抗多径均衡算法及计算机软件进行搭建。现场实际测试结果表明,主链业务上行、下行速率分别达25.6 kbit/s、2 Mbit/s,满足高清视频回传需求;副链业务上行、下行速率均可达25.6 kbit/s,满足飞控通信需求;主、副链通信试验距离为80 km,满足远距离巡线需要。进一步通过数据推算分析,认为主、副链通信距离可达150 km以上。

Aiming at the problem of short communication distance of unmanned aerial vehicle(UAV)in transmission line patrol inspection,a real-time transmission technology of UAV long-distance data link information is proposed.The UAV remote communication data link platform is based on software radio,adaptive coding modulation and antenna automatic alignment technology,and is built by using MAC(physical)layer design,anti-multipath equalization algorithm and computer software.The field test results show that the uplink and downlink rates of the main chain service are 25.6 kbit/s and 2 Mbit/s respectively,which meets the demand of high-definition video return.The uplink and downlink rates of the secondary chain service can reach 25.6 kbit/s,which can meet the needs of flight control communication.The communication test distance of the main and the second link is 80 km,meeting the needs of long-distance line inspection.The further data analysis proves that the communication distance of the main link and the secondary link can reach more than 150 km.