Short time Fourier transform (STFT) is used to represent signals in time and frequency domains and depends on window size. In MATLAB, a function “spectrogram” is used to detect frequencies and their exact order to analyze signals using STFT. Color bars shown in figures are indicating low to...
ECG spectrogrampower spectral densitycardiac diagnosisMost of the clinically useful information carried by the ECG is found in the morphology of the QRS complexes and in the T wave, measured as amplitude, deformations and duration. The aim of the study is to detected after wavelet transform, ECG...
For consistency, use the same training and test sets as for the scattering transform. Set the parameters for the mel-frequency spectrograms. Use the same window, or frame, duration as in the scattering transform, 0.22 seconds. Set the hop between windows to 10 ms. Use 40 frequency ban...
We have assessed the performance of our surrogate method by comparing our results with those obtained from a non-stationary surrogate algorithm based on discrete wavelet transform. Results confirm that, compared with stationary Fourier-based and non-stationary DWT-based surrogate algorithms, our method ...
AN IMPROVED SPECTROGRAM USING THE MULTIANGLE CENTERED DISCRETE FRACTIONAL FOURIER TRANSFORM The spectrogram is a useful tool for the time-frequency analysis of non stationary signals. This tool, however, is based upon a multicomponent sinusoidal m... JG Vargas-Rubio,B Santhanam - IEEE 被引量: 39...
Set the parameters for the mel-frequency spectrograms. Use the same window, or frame, duration as in the scattering transform, 0.22 seconds. Set the hop between windows to 10 ms. Use 40 frequency bands. segmentDuration = 8192*(1/8000); frameDuration = 0.22; hopDuration = 0.01; numBa...
Set the parameters for the mel-frequency spectrograms. Use the same window, or frame, duration as in the scattering transform, 0.22 seconds. Set the hop between windows to 10 ms. Use 40 frequency bands. Get segmentDuration = 8192*(1/8000); ...
Set the parameters for the mel-frequency spectrograms. Use the same window, or frame, duration as in the scattering transform, 0.22 seconds. Set the hop between windows to 10 ms. Use 40 frequency bands. Get segmentDuration = 8192*(1/8000); ...
Wavelet transform is applied to a Strength Pareto Evolutionary Algorithm 2 (SPEA2)-based BSS algorithm. Signals are analyzed on the frequency axis and applied to MOO. Thus, a performance increase was achieved in the separation of signals. With this developed algorithm, Discrete Wavelet Transform (...
Consequently, a unique and highly reliable approach for identifying faults in TLs is presented in this work, which employs Wavelet Transform and is evaluated using Matlab simulation. Wavelets of various kinds were utilized to demonstrate their dependability. Furthermore, utilizing this approach has ...