On the use of short-time fourier transform and synchrosqueezing-based demodulation for the retrieval of the modes of multicomponent signals

In this paper, our goal is to compare different recent time frequency (TF) approaches to retrieve the modes of multicomponent signals (MCSs). While it is acknowledged that the synchrosqueezing transform (SST) improves the readability of the time frequency representation (TFR) of the modes of MCSs, and that SST based demodulation (DSST) is more efficient than SST itself for mode retrieval (MR), it is unclear whether DSST outperforms downsampled short time Fourier transform (STFT) in that matter. The goal of the present paper is to answer this question and to propose a variant of DSST that reduces mode-mixing. The focus is put on the sensitivity of the different techniques to frequency modulation for the modes and frequency resolution. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

This paper compares various time frequency approaches for retrieving the modes of multicomponent signals, focusing on the performance of DSST and STFT in this regard, and introduces a variant of DSST with reduced mode-mixing.