无人机巡检系统中高频效的混合波束赋形方法

随着智能电网的发展,无人机巡检输电线路应用越来越广泛.为了有效实施输电线路故障定位和类型判断,要求无人机回传视频图像的分辨率越高越好.在带宽有限的条件下,需要尽可能提高无人机回传通信链路的频谱效率,以满足高分辨率视频图像对传输速率的需求.提出基于Mesh网络的视频图像回传通信方法.通过在杆塔上部署无线接入节点并构建Me...

Hybrid beamforming method with high spectral efficiency for unmanned aerial vehicle patrol system

With the development of smart power grid， Unmanned Aerial Vehicles （UAVs） are more and more widely used for inspection of transmission lines. In order to effectively implement fault location and type judgment of transmission lines， UAVs are required to transmit videos and images with high resolution. Under the condition of limited bandwidth， it is necessary to improve the spectral efficiency of UAV return communication link as much as possible to meet the transmission rate requirements of high-resolution videos and images. A video image transmission communication method based on mesh network was proposed. By deploying the wireless access nodes on tower and building Mesh network， the communication devices carried by UAVs could communicate with the built Mesh network as the network nodes at any time. After capturing a video of the failure on transmission lines， the video could be quickly transmitted to the data center by UAVs. For this purpose， the communication module of the patrol UAV was equipped with a large-scale antenna array， in millimeter wave frequency band， a heuristic point-to-point directional hybrid beamforming method was adopted to improve the spectral efficiency of receiving communication link. The simulation results show that the performance of the proposed method is better than that of the Orthogonal Matching Pursuit （OMP） method and is closer to that of the fully digital beamforming method.