《计算机应用》唯一官方网站 ›› 2022, Vol. 42 ›› Issue (3): 980-984.DOI: 10.11772/j.issn.1001-9081.2021030445

• 网络与通信 • 上一篇    

无人机巡检系统中高频效的混合波束赋形方法

凌欣(), 李民政   

  1. 上海电机学院 电子信息学院,上海 201306
  • 收稿日期:2021-03-23 修回日期:2021-07-08 接受日期:2021-07-08 发布日期:2022-04-09 出版日期:2022-03-10
  • 通讯作者: 凌欣
  • 作者简介:李民政(1972—),男,陕西旬邑人,教授,博士,CCF会员,主要研究方向:无线通信系统中的分集编码、网络编码,预编码,无线传感器网络,嵌入式系统。
  • 基金资助:
    上海科技计划项目(21010501000)

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

Xin LING(), Minzheng LI   

  1. School of Electronic and Information Engineering,Shanghai Dianji University,Shanghai 201306,China
  • Received:2021-03-23 Revised:2021-07-08 Accepted:2021-07-08 Online:2022-04-09 Published:2022-03-10
  • Contact: Xin LING
  • About author:LI Minzheng, born in 1972, Ph. D., professor. His research interests include diversity coding, network coding and precoding in wireless communication system, wireless sensor network, embedded system.
  • Supported by:
    Science and Technology Program of Shanghai(21010501000)

摘要:

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Mesh网络,无人机搭载的通信设备作为网络节点可随时与构建的Mesh网络进行通信。在获取输电线路故障的视频后,无人机能迅速将视频回传到数据处理中心。为此在巡检无人机的通信模块中配备了大规模天线阵列,在毫米波频段采用启发式点对点定向混合波束赋形方法,从而提高接收通信链路的频谱效率。仿真结果表明,与正交匹配追踪(OMP)方法相比,所提方法性能更优且更接近于纯数字波束赋形方法的性能。

关键词: 无人机巡检, 视频传输, 混合波束赋形, 大规模天线阵列, 频谱效率

Abstract:

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.

Key words: Unmanned Aerial Vehicle (UAV) patrol, video transmission, hybrid beamforming, large scale antenna array, spectral efficiency

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