Zoom synchrosqueezing transform and iterative demodulation: Methods with application
We propose a zoom synchrosqueezing transform for signals with highly oscillating IF. We propose a ZST based iterative method for signals with nonlinear and close IFs. Zoom synchrosqueezing transform can provide excellent time frequency resolution. Proposed ZST based iterative method can provide exact IF estimation results. The proposed method is applied to extract rub-impact fault feature.
zoom synchrosqueezing transform iterative demodulation instantaneous frequency estimation time-frequency analysis rub-impact fault diagnosis