Results 11 to 20 of about 8,503,197 (295)
The relationship between instantaneous frequency and time-frequency representations [PDF]
IEEE Transactions on Signal Processing, 1993 This paper describes a procedure for the time-frequency analysis of signals based on Time-Frequency Distribution (TFD) and Instantaneous Frequency (IF) estimation. First we use a suitable TFD to determine the number of signal components. Then if the signal is monocomponent , the IF law cam be estimated directly.
Brian C. Lovell +2 more
openaire +5 more sources
Leak detection using instantaneous frequency analysis [PDF]
, 2012 Leaking pipes are a primary concern for water utilities around the globe as they compose a major portion of losses. Contemporary interest surrounding leaks is well documented and there is a proliferation of leak detection techniques. Although the reasons
ghazali, mohd fairusham
core +6 more sources
Definition Of Instantaneous Frequency On Real Signals
, 2000 Publication in the conference proceedings of EUSIPCO, Tampere, Finland ...
Saliu, Sokol,
core +5 more sources
Instantaneous frequencies in the Kuramoto model [PDF]
Physical Review E, 2020 Using the main results of the Kuramoto theory of globally coupled phase oscillators combined with methods from probability and generalized function theory in a geometric analysis, we extend Kuramoto's results and obtain a mathematical description of the instantaneous frequency (phase-velocity) distribution.
da Fonseca, Julio +2 more
openaire +7 more sources
Sensors, 2020 It is proposed a novel instantaneous frequency estimation technology, multi-generalized demodulation transform, for non-stationary signals, whose true time variations of instantaneous frequencies are unknown and difficult to extract from the time ...
Dezun Zhao +3 more
doaj +1 more source
IEEE Access, 2020 The time-frequency energy distribution processed by a short-time Fourier transform can be compressed to the real instantaneous frequency by the synchrosqueezing transformation (SST), which improves the time-frequency energy concentration of the signal ...
Xin Li +3 more
doaj +1 more source
Rule-Based EEG Classifier Utilizing Local Entropy of Time–Frequency Distributions
Mathematics, 2021 Electroencephalogram (EEG) signals are known to contain signatures of stimuli that induce brain activities. However, detecting these signatures to classify captured EEG waveforms is one of the most challenging tasks of EEG analysis. This paper proposes a
Jonatan Lerga +3 more
doaj +1 more source
IEEE Access, 2020 The fault vibration signal of rotating machinery system under strong background noise has the characteristics of non-stationary, non-Gaussian and complex components.
Yanfeng Li, Zhennan Han, Zhijian Wang
doaj +1 more source
Entropy, 2022 Instantaneous frequency in multi-sensor recordings is an important parameter for estimation of direction of arrival estimation, source separation, and sparse reconstruction.
Nabeel Ali Khan, Sadiq Ali, Kwonhue Choi
doaj +1 more source
Instantaneous Frequency Extraction Using the EMD-Based Wavelet Ridge to Reveal Geological Features
Frontiers in Earth Science, 2018 As one of the important seismic attributes, instantaneous frequency (IF) is widely used to reveal geological features. Compared to the normally IF extraction using Hilbert transform (HT), IF extraction using the wavelet ridge is demonstrated to have a ...
Ya-juan Xue +4 more
doaj +1 more source