For the purpose of processing the data from radar,continuous storage of a large number of data are needed.The paper introduces the implementation of radar data acquisition system based on PCI Express bus,this system uses FPGA as control core,and bases on PCI Express IP core.This paper analyses the characteristic of PCI Express IP core,designs control logic,and displays the simulation result diagrams.Dual-port RAM is used as buffer in the designing.The system has better capacity extendibility and performance.The practical measurements show that this method is simple and meets the requirements of data recording and storing.It can achieve the data acquisition with 200MHz sampling and 32bit.%由于雷达信号处理的要求,需要对雷达数据进行高速大容量记录,本文介绍了基于PCI Express总线的雷达数据采集系统的实现,该系统以FPGA为控制核心,PCI Express核为基础,分析了PCI Express核的特点,设计了专用控制逻辑,最后给出了控制逻辑的仿真图。设计中采用双端口RAM作为缓存,利用FPGA实现数据的转换和编码,系统容量和可扩展性较高。实测表明这种方法设计简单,满足了对雷达数据记录和存储的要求,可以实现最高采样速率200MHz,I/Q双通道32bit的数据采集。
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