Publications [#328815] of Hau-Tieng Wu
Papers Published
- Sheu, YL; Hsu, LY; Chou, PT; Wu, HT. "Entropy-based time-varying window width selection for nonlinear-type time–frequency analysis." International Journal of Data Science and Analytics 3.4 (June, 2017): 231-245. [doi]
(last updated on 2024/08/25)Abstract:
We propose a time-varying optimal window width (TVOWW) and an adaptive optimal window width selection schemes to optimize the performance of several nonlinear-type time–frequency analyses, including the reassignment method and its variations. A window rendering the most concentrated distribution in the time–frequency representation is regarded as the optimal window. The TVOWW selection scheme is particularly useful for signals that comprise fast-varying instantaneous frequencies and small spectral gaps. To demonstrate the efficacy of the method, in addition to analyzing synthetic signals, we study an atomic time-varying dipole moment driven by two-color mid-infrared laser fields in attosecond physics and near-threshold harmonics of a hydrogen atom in the strong laser field.