超速行驶是引起交通事故的主要原因之一，雷达测速仪是检测车辆超速行驶的有效方式之一。本代码用Matlab仿真实现多普勒雷达测速，在MATLAB仿真软件中对被检测车辆运动产生的多普勒频率进行频谱分析。-Speeding is one of the main causes a traffic accident, the radar gun is one effective way to detect speeding vehicles. The code using Matlab simulation Doppler radar gun, the vehicle motion is detected Doppler frequency spectrum analysis in MATLAB simulation software.