球载观测系统的无线图像传输系统设计

为实现系留气球观测系统轻量化无线图像高速稳定传输,文中采用了ZYNQ+AD9361硬件架构和正交频分复用技术实现无线图像传输系统设计。ZYNQ的FPGA部分实现了与AD9361射频前端的数字接口,与ZYNQ的ARM部分的数据通道,以及基于IEEE 802.11a标准的基带处理器物理层。ARM部分运行Linux操作系统,可在该系统上完成对AD9361配置的应用程序的开发、物理层管理以及与上位机和摄像机的数据交互。无线图像传输系统的引入,实现了空中系留气球观测平台与地面控制中心点对点的无线图像传输,增强了系留气球观测系统目标监测的可靠性。该通信系统结合了软件无线电系统灵活性配置、正交频分复用技术频谱利用率高以及抗多径效应等优点,能够随着系留气球观测系统应用于各种复杂环境中。

The Design of Wireless Image Transmission System for Balloon-borne Observation System

In order to achieve lightweight and high-speed wireless transmission of images in the tethered balloons observation system, hardware architecture ZYNQ+AD936 orthogonal frequency division multiplexing technology was adopted. The digital interface with AD9361 RF front end, the ARM part data channel with ZYNQ, as well as the physical layer of baseband processor based on IEEE802.11a standard could be realized through FPGA part of ZYNQ. The ARM section ran the Linux operating system, where the development of AD9361 configuration applications, physical layer management, and data interaction with the host computer and the camera could be achieved. The introduction of wireless image transmission system accomplished the point to point wireless image transmission between the air balloon observation platform and the ground control center, enhancing the reliability of tethered balloons target monitoring observation system. The proposed communication system combined the merits of software radio system, flexible configuration and orthogonal frequency division multiplexing spectrum of high utility and anti-multipath effect, thus it could be applied to a variety of complex environments with the tethered balloon observation system.