基于Matlab的USB数据采集卡上位机处理系统

摘要

To receive and process the acquired radar data in the multi-channel range radar system,a Matlab-based USB data acquisition board PC program was designed.With the help of Mex file,Matlab＇s external program interface was extended which made it possible for this Matlab program to receive the multi-channel data sent from USB2.0 interface.After that this program processed the received multi-channel data with several kinds of digital signal processing methods such as filter and FFT.Testing has proved that this Matlab program can process 6-channel range radar signal and get the frequency and voltage amplitude of each channel.All these results were displayed in the GUI interface.%在多通道测距雷达系统中,为了对USB数据采集卡采集到的雷达数据进行接收和处理,设计了一种基于Mat-lab的USB数据采集卡上位机处理程序。该程序通过编写Mex文件扩展Matlab的外部程序接口,使其能够对USB2.0接口传输的数据进行实时接收,然后在Matlab中利用其强大的数字信号处理功能对读取的多通道雷达数据分别进行滤波、FFT等数字信号处理,最后利用Matlab GUI编写用户操作界面,对处理结果加以显示。经测试,该上位机程序系统能够对6通道测距雷达信号数据进行处理,分别得到各个通道信号的频率和电压幅度,并将结果显示在GUI用户操作界面上。