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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 radar echo signal acquisition and storage are the necessary prerequisites for target recognition and radar imaging. With the rapid development of A / D sampling rate and computer bus technology, it is possible to acquire the radar echo signal directly at IF in real time. This paper introduces a hardware architecture and related logic module functions of ADLINK PCI-based high-speed and high-resolution data acquisition card PCI9820. Based on the idea of double buffering mode and using the related driving functions of board, a real-time acquisition program is compiled, And explains the storage file format and data format. The experimental results show that this real-time acquisition program can control the PCI9820 data acquisition card to achieve high-speed and high-resolution real-time acquisition and storage of radar echo signals, which provides a good data foundation for signal processing.