ConceptSTFT
Short-Time Fourier Transform
A signal processing method for time-frequency analysis. Through windowed Fourier transforms, it reveals how the frequency content of a signal changes over time.
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Nov 3
In time-frequency analysis (such as the short-time Fourier transform or wavelet transform), the Doppler shift appears as a clear curved trajectory, whereas white noise is a randomly fluctuating broadband background that does not form a structured time-frequency pattern.
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