Noise Attenuation Filtering for Time-Phase Modulation Using the S-Transform

摘要

The S transform (ST) is a time-frequency analysis algorithm which can be considered as an intermixture of the short time Fourier transform and wavelet transform. It has an adaptive window, and the width changes with frequency, which brings much flexibility to application. In this paper, the ST and the timefrequency filtering are applied to the noise attenuation filtering for Time-Phase Modulation (TPM). Experimental simulation result shows that the ST and the ST time-frequency filtering are effective for noise attenuation and useful to the TPM filtering.