To digitize and acquire the muhi-channel range radar signal, a multi-channel data acquisition system was designed. This system was based on FPGA and USB2.0 interface, several digital logic control modules were constructed in FPGA to control the AD conversion of analog signal and data cache. The acquired data was sent from the data cache to PC through the USB2.0 interface. All these designs achieved a complete multi-channel data acquisition, storage and transmission system. It can acquire 8 channels range radar signal and its highest single-channel sample rate up to 250KSPS. With the help of USB2.0 interface chip, all acquired data can be send to PC in time for further digital signal processing.%针对实现多通道测距雷达信号的数字化采集的目的．设计了一种基于FPGA和USB接口的多通道数据采集系统。该系统采用在FPGA芯片中构建多个数字逻辑模块的方法，实现对AD芯片模数转换过程的控制。并利用IP核在FPGA中构建存储器，对采样得到的数据进行缓存，最后通过USB2．0接口芯片将缓存中的采样数据及时传输至上位机。通过将该系统与多通道测距雷达相连接从而进行整机测试。测试结果证明，该系统能够实现最多8路测距雷达信号的采集，且在8路情况下的单路最高采样率达250KSPS，并能通过USB2．0接口向上位机传输各路雷达信号的采样数据。使进一步的数字信号处理成为可能。
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