Abstract:

The WVD(Wigner-Ville Distribution) is an important  method of time-frequency analysis, but the cross-term interference in WVD has a  bad influence.Aiming at the characters of cross-term interference.An amelioration algorithm—united algorithm basted on STFT(Short-Time Fpiroer Tramsfpr) and WVD (STFT-WVD)  was proposed to solving the problem. Between the Spectrogram and WVD of signals, united algorithm makes a cross correlation to achieve an ideal effect. By analyzing and simulating, it is proved that STFT-WVD suppresses the cross-term interference in WVD effectively, and keeps the excellent time-frequency resolution as WVD. So STFT-WVD is an effective amelioration algorithm of WVD.

Key words: wigner-ville distribution (WVD), cross-term interference, spectrogram, united algorithm