Synchrosqueezing transforms: From low- to high-frequency modulations and perspectives
نویسندگان
چکیده
منابع مشابه
Synchrosqueezing-Based Recovery of Instantaneous Frequency from Nonuniform Samples
We propose a new approach for studying the notion of the instantaneous frequency of a signal. We build on ideas from the Synchrosqueezing theory of Daubechies, Lu, andWu [Appl. Comput. Harmonic Anal., 30 (2010), pp. 243–261] and consider a variant of Synchrosqueezing, based on the short-time Fourier transform, to precisely define the instantaneous frequencies of a multicomponent AM-FM signal. W...
متن کاملHigh-frequency Broadband Modulations of Electroencephalographic Spectra
High-frequency cortical potentials in electroencephalographic (EEG) scalp recordings have low amplitudes and may be confounded with scalp muscle activities. EEG data from an eyes-closed emotion imagination task were linearly decomposed using independent component analysis (ICA) into maximally independent component (IC) processes. Joint decomposition of IC log spectrograms into source- and frequ...
متن کاملSimultaneous EEG-fMRI during a Working Memory Task: Modulations in Low and High Frequency Bands
BACKGROUND EEG studies of working memory (WM) have demonstrated load dependent frequency band modulations. FMRI studies have localized load modulated activity to the dorsolateral prefrontal cortex (DLPFC), medial prefrontal cortex (MPFC), and posterior parietal cortex (PPC). Recently, an EEG-fMRI study found that low frequency band (theta and alpha) activity negatively correlated with the BOLD ...
متن کاملDesign of Low Power and High Gain Boosted Ota for High Frequency Radio Modulations and Telecommunication Systems
This paper presents the design of high gain and low power fully differential Operational Transconductance Amplifier(OTA). Both the main conventional OTA and the boosting amplifiers are fully differential folded cascode.To increase the open-loop gain of the main OTA two auxiliary operational amplifiers(op-amps) are used . These auxiliary op-amps are fully differential folded cascode op-amps with...
متن کاملLow-frequency vocal modulations in vowels produced by Parkinsonian subjects
13 Low-frequency vocal modulations here designate slow disturbances of the phonatory 14 frequency F0. They are present in all voiced speech sounds, but their properties 15 may be affected by neurological disease. An analysis method, based on continuous 16 wavelet transforms, is proposed to extract the phonatory frequency trace and low17 frequency vocal modulation in sustained speech sounds. The...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Comptes Rendus Physique
سال: 2019
ISSN: 1631-0705
DOI: 10.1016/j.crhy.2019.07.001