fourier-transform

  1. How does matlab recover picture from magnitude spectrum alone?
  2. What are the advantages of Laplace Transform vs Fourier Transform in signal theory?

  3. Separation of overlapping frequencies

  4. Differences between FFT from acceleration, velocity and displacement data of a dynamic system
  5. From MFCC to Machine learning. What are the steps?
  6. Comparison between 2 images in Frequency domain

  7. Is this a kind of aliasing error and how to make correction?

  8. Sampling and filtering of a signal
  9. How to convert dB back to manitude and then to rectangular format
  10. Convolving with the frequency response of a filter

  11. Hilbert Spectrum vs. STFT

  12. Is there any optimised algorithm to calculate 2D fourier transform

  13. Online DFT Algorithm

  14. Relation between two k-spaces phase-frequency and spatial frequencies in
  15. Finding out modulation index and DC offset
  16. DFT of time reversed signal

  17. Problem identifying the analytic expression of such determined signal
  18. Determination of periodicity in data and finding mean
  19. Finding audio signal time delay: cross-correlation vs. impulse response?
  20. Why the energy is a good feature extraction for detect disturbances in signal processing?

  21. Fourier domain: temporal versus spatial
  22. Using Goertzel Algorithm in under-sampling

  23. Question related to Deconvolution and Fourier Transform

  24. How to interprete the Power Spectral Density estimate plot

  25. Discrete time inverse fourier transform of cosine squared
  26. What does it mean for the DFT phase to be relative to a cosine wave?
  27. Convolution in spatial domain is multiplication in frequency domain

  28. How to get the scale bar of an FFT for a 2d image
  29. How does a Hermitian FFT work in Numpy?
  30. How to perform a Stockwell Transform on a 2D matrix

  31. Mathematical relationship between highpass and lowpass filtering
  32. Plotting frequency spectrum

  33. Phase error correction for Fourier transform basis vectors
  34. Windowed Fourier Transform
  35. How to set sampling frequency of an acceleration data set
  36. How do I perform Spectral Analysis (FFT, Windowing, Detrending) on Sonic Anemometer Data?

  37. Phantom harmonics when using cosine windows why do they appear and how to avoid them?
  38. Problems Using FFT to Compute Impedance in a Model Neuron

  39. What's the difference between using DFT, IDFT or DCT to calculate cepstrum of a power spectrum?

  40. Calculation of cosine in frequency domain instead of calculatin in time-domain followed by a FFT
  41. Intuitive explanation of cross-correlation in frequency domain

  42. FFT of resultant of signals
  43. How can I obtain a generalized Fourier series for a quasi-periodic signal if the frequencies present in the signal are known?

  44. Finite moving average filter
  45. Relation between samplingrate and frequency
  46. Plotting a sampled signals DTFT using its CTFT

  47. How to calculate multiplication of two discrete series
  48. Computing real signal with minimum absolute values from even magnitude spectrum

  49. Confused on the difference between the frequency spectrum of an entire song, and the frequency spectrum of a point in time

  50. System Identification with periodic signal confusion
  51. Occupied Bandwidth
  52. Why do wavelets integrate to 0 and how do they match a signal?
  53. Difference in Interpretation: $ω$ (rads/s) vs. $ω$ (rads) and $X(ω)$ vs. $X(e^{jω})$
  54. Combining spectrograms with different windows to getting arbitrary time and frequency resolution

  55. Circular convolution with cuFFT significantly deviates from CPU result with scipy.fftpack for large image sizes

  56. Complex conjugate and IFFT
  57. Parseval's Theorem for discrete series

  58. How to do simple extrapolation with Fourier transformation?

  59. How can a changing signal be Fourier transformed?

  60. Significance of an impulse in the frequency domain
  61. Does "keying on" a sine wave at a zero-crossing reduce its bandwidth?
  62. How to apply Blackman-Tukey method in MATLAB?

  63. Meaning of transform's area - Fourier

  64. Fourier transform of $\cos(n\omega t)$
  65. Periodicity of a constant signal!
  66. Signal reconstructed using IFFT: amplitude scale larger than input

  67. How do optical anti-aliasing filters work from a frequency domain perspective?

  68. Spectrum analysis of a function
  69. Discrepancy between Gaussian FFT and its Fourier Transform

  70. How are images considered non-stationary signal when they are invariant to time?
  71. How to find out amplitude of harmonic after diff type of FT?

  72. Does MatLab's `ftt` function gives a Fourier Transformed signal in terms of frequency $f$ or angular frequency $\omega$?
  73. Fourier Transformed a signal $f(t) = \cos(2\pi*4t)*5\cos(2\pi*0.4t)$ but did not get expected results. What went wrong?
  74. Show That the Power Spectrum Density Matrix Is Positive Semi Definite (PSD) Matrix
  75. What will be the filtered output?

  76. Inverse Fourier Transform of the real part of fourier transform, and inverse transform of the imaginary part of fourier transform

  77. What is the physical meaning of Fourier Transform having only $\delta(\omega)$ functions?
  78. A system that perfoms Fourier Transform operation - is it an LTI system?

  79. what is the difference between $X(j\omega)$ and $X(\omega)$ notation
  80. Prove the dirac delta contains all frequencies
  81. Find the nyquist sampling rate?
  82. FFT Matlab - Meaning of Frequency Vector
  83. combining frequency "modes" from many similar images
  84. Inverse DTFT of left-sided sequence
  85. Meaning and unit of frequency in Laplace (Fourier) transform

  86. What happens when we reconstruct a signal after its Fourier transform is done and some frequencies are altered?

  87. Efficient frequency determination

  88. Why do signal have mirror signal after pure frequency shift?

  89. How is the simplified version of the Bromwich inverse Laplace transform integral derived?
  90. What is the most lucid, intuitive explanation for the various FTs - CFT, DFT, DTFT and the Fourier Series?
  91. Periodogram, clarification regarding different definitions

  92. Normalised magnitudes in sliding dft
  93. Why phase information is usually ignored after Fourier transform?

  94. How to combine bins of my DFT
  95. MP3 Filterbank + MDCT: Why?

  96. How to circularly shift a signal by a fraction of a sample?

  97. Am I missing a factor in this Fourier Transform?
  98. How to filter out everything but a single frequency in the time domain?

  99. How do I convert a real baseband signal to a complex baseband signal?
  100. Compute hilbert transform from DCT- FFTW3 REDFT00