Retrieval of the Modes of Multicomponent Signals from Downsampled Short-Time Fourier Transform

International audienceIn this paper, we investigate the retrieval of the modes of multicomponent signals from their downsampledshort-time Fourier transform. To this end, we first recall signal reconstruction techniques basedon shifted downsampled short-time Fourier transform, and then explain how to adapt these to the contextof the retrieval of the modes of a multicomponent signal. We then show, on simulated and real data,that downsampling the short-time Fourier transform does not result in a significant performance lossof the mode retrieval procedures. Finally, comparisons with recent mode retrieval techniques based onsynchrosqueezing transform are carried out, the focus being put on the amount of information needed toperform the recovery of the modes