基于PCI9820的雷达回波信号实时采集系统

Real-time Acquisition System of Radar Echo Signal Based on PCI9820

精确的雷达回波信号采集存储是完成目标识别和雷达成像的必要前提,随着A/D采样率和计算机总线技术的高速发展,已经可以在中频直接对雷达回波信号进行实时采集。本文介绍了一种ADLINK公司的基于PCI总线的高速高分辨率数据采集卡PCI9820的硬件结构及相关逻辑模块功能,基于它的双缓冲模式思想并利用板卡的相关驱动函数编写了实时采集程序,并说明了存储文件格式及数据格式。实验结果表明,此实时采集程序能够很好的控制数据采集卡PCI9820完成对雷达回波信号的高速高分辨率实时采集和存储,为信号处理提供了良好的数据基础。

Precise acquisition and storage of radar echo signal are prerequisite to accomplish radar target recognition and imaging well. Nowadays, with fast development of A/D sampling rate and computer bus technique, it's already possible to sample real-time radar echo signals at intermediate frequency. In this paper, a high-speed, high-resolution data acquisition card called PCI9820 of ADLINK based on PCI bus is introduced. Its hardware structure and functions of correlative logic blocks are also described. Based on its double-buffer mode and using its driver functions, a program used to sample real-time data is made, followed by the description of the data file format and data format on disk. It works well to control DAQ PCI9820 to accomplish high-speed, high-resolution real-time sampling and storage of radar echo signals for further study.