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112 votes
12 answers
94k views

What is the physical significance of negative frequencies?

-1 votes
2 answers
123 views

DFT of a sine, closed form solution

1 vote
1 answer
266 views

Fourier transform identity not working in Matlab

0 votes
1 answer
23 views

Displaying and analyzing an audio file in MATLAB

42 votes
6 answers
157k views

Difference between Discrete Time Fourier Transform and Discrete Fourier Transform

5 votes
4 answers
1k views

Finding maximum using DFT

14 votes
7 answers
11k views

The difference between DFT and DFS

5 votes
5 answers
9k views

About Discrete Fourier Transform vs. Discrete Fourier Series

19 votes
8 answers
19k views

Why Does the DFT Assume the Transformed Signal Is Periodic?

0 votes
0 answers
17 views

Unbiased estimation of the bispectrum

-1 votes
1 answer
62 views

Why does my irFFT function have a small discrepancy distributed through the entire output?

0 votes
1 answer
51 views

Getting different results when fourier transforming in python vs mathematica?

1 vote
1 answer
1k views

How to calculate the spatial frequency of an image in cycles per image

1 vote
3 answers
133 views

What is the frequency response of binning 2x2 pixels of an image into 1 pixel in software?

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