Improve the Accuracy of Measurement of time-domain EMI by Signal Processing
NIU Hong-liang;Xi'an Railway Vocational and Technical Institute;
Analyse the time-domain data of spectrum with short-time FFT algorithm, the signal need to meet stationarity assumptions. Therefore,transient signal such as peak and impulse, cannot get the correct analysis results.Overlapping FFT is a powerful tool for time domain analysis of nonstationary signal.Bring in different overlapping depth, detailed analysis was carried out on the sample information. So it can avoid leakage frequency spectrum which the zero point of both window function sides may influence on the interference signal.It can seamless capture the transient signal, such as aperiodic, peak, impulse and frequency hopping.
【CateGory Index】： TM937.3;TN911.7