विधियों की तुलना करें

	फूरियर ट्रांसफ़ॉर्म और स्पेक्ट्रल विश्लेषण (FFT)	हिल्बर्ट-हुआंग रूपांतरण
क्षेत्र	संकेत प्रसंस्करण	संकेत प्रसंस्करण
परिवार	Machine learning	Machine learning
उद्भव वर्ष	1965	1998
प्रवर्तक	James Cooley & John Tukey (FFT)	Norden Huang et al.
प्रकार	Frequency-domain decomposition algorithm	Adaptive time-frequency analysis method
मौलिक स्रोत	Cooley, J. W., & Tukey, J. W. (1965). An algorithm for the machine calculation of complex Fourier series. Mathematics of Computation, 19(90), 297–301.	Huang, N. E., et al. (1998). The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis. Proceedings of the Royal Society A, 454(1971), 903–995.
उपनाम	Fast Fourier Transform, Discrete Fourier Transform, Spectral Analysis, Fourier Dönüşümü	HHT, EMD-Hilbert Spectral Analysis, Hilbert Spektral Analizi, Adaptive Time-Frequency Decomposition
संबंधित	2	2
सारांश	The Fourier Transform decomposes a time-domain signal into its constituent sinusoidal frequencies, revealing the spectral content hidden within complex waveforms. Joseph Fourier introduced the continuous transform in 1822, but the computationally efficient Fast Fourier Transform (FFT) was formalized by James Cooley and John Tukey in 1965. Their landmark algorithm reduced the computational complexity from O(N²) to O(N log N), making large-scale spectral analysis practical across engineering, physics, and data science.	The Hilbert-Huang Transform (HHT) is an adaptive, data-driven method for analyzing non-linear and non-stationary time series, introduced by Norden E. Huang and colleagues in 1998. It combines Empirical Mode Decomposition (EMD), which decomposes a signal into intrinsic mode functions (IMFs), with the Hilbert spectral analysis to produce instantaneous frequency and amplitude representations without assuming signal stationarity or linearity.