Velocity monitoring signal processing method of track traffic based on Doppler effect

Abstract

In order to improve the monitoring efficiency of track traffic speed, a signal processing method based on Doppler effect is purposed to meet the accurate velocity measurement of high speed trains. As a result, the track traffic radar monitoring signal processing method based on the Doppler effect is studied. First of all, the Doppler effect and the Doppler principles are analysed. Then, the research of signal processing algorithm of rail traffic radar system is focused on, and the improvement method of a real sequence fast Fourier transform (FFT) imaginary part arithmetic algorithm is put forward. The process of FFT algorithm is simplified, and finally, through the MATLAB software simulation, the improved FFT algorithm spectrum analysis effect is further verified. The test results showed that the use of improved FFT algorithm ensured the measurement accuracy, and improved the Doppler frequency calculation speed. In addition, it can meet the processing requirements of rail traffic radar velocity measurement system on the rail traffic velocity monitoring signal.