基于PCIe总线的超高速信号采集卡的设计

Design of ultra-high speed data acquisition card based on PCIe bus

设计一种基于PCIe总线的不间断采样和传输的超高速数据采集卡。利用双400 MHz、14位A/D转换器实现了800 MHz、14位的信号高速、高精度采集,论述了利用Xilinx公司FPGA的IPCORE设计实现PCIe总线控制接口。基于PCIe总线,采用乒乓交换数据传输的机制,实现了高速采样数据流的不间断传输。最后给出了实际采集数据的频谱。利用该采集卡构成的数据采集系统在雷达侦察和干扰领域拥有很高的实用价值和广阔的应用前景。

An uhra-high speed data acquisition card which c an sample and transmit data continuously is studied. A 800MHz, 14bits data acquisition system is carried out by using two 400MHz, 14bits data acquisition modules. The PCIe interface based on the Xilinx FPGA IPCORE is introduced. The method of fast band switching is used for data transferring, then the ability of long time data sampling and transmitting is achieved. The data acquisition system based on the card can be used in many aspects such as radar counterwork.