引信点目标回波模拟及杂波采集测试平台实现

Fuze Visual Point-object Simulation and Noise Collection System

给出点目标视频回波信号模拟的原理和实现过程,采用相干视频模拟方法建模、软件数据预生成的设计方法,克服硬件实现点目标回波信号运算量和存储量大的瓶颈。针对回波信号传输过程中对实时高精度信号处理的要求,采用FPGA为控制核心,配合SDRAM缓存和高速DA,实现信号频率100MHz、时域精度5ns、模拟电压精度为1mV的回波信号模拟。为了定位引信故障,需要实时大容量采集引信处理机积累的20Mb/s的杂波数据,采用USB2.0总线和多线程双缓存等软件技术,实现杂波数据实时显示,同时完成磁盘存储和分析,单次运行可以接收杂波数据10GB以上。现场运行表明,测试台能够有效完成点目标视频信号模拟和杂波数据采集,工作稳定可靠。

This paper gives the theory and realization of fuze visual point-object simulation.With the software modeling method,the limitation of hardware capacity is solved.In order to meet the acquirement of high speed and high accuracy data processing,a design based on FPGA,SDRAM and DA is created and it can generate 100MHz signal with 5ns and 1mV accu-racy.To fulfil the task of huge amount noise data collection,this design uses USB2.0,multithreading and double cache tech-niques.Now more than 10 GB noise data can be collected with real-time display and storage.The in-field test indicates that this system can accomplish visual simulation and data collection,and it is stable.