2 votes

Use DFT (`fft()`) to Replicate 2D Convolution (`conv()`)

HINT ...
Engineer's user avatar
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2 votes
Accepted

What is the rationale behind the "same" mode of discrete convolution?

I think that the only reason why the same mode exists is because sometimes it is convenient if the output has the same length as the input (assuming that the input ...
Matt L.'s user avatar
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2 votes
Accepted

Fourier transform of $|x_\mathrm{a}(t)|^2$

Your result is correct, but it can be simplified by noticing that the two integrals in your solution are actually identical, which for $f>0$ leads to $$\mathscr{F}\left\{|x_\mathrm{a}(t)|^2\right\}=...
Matt L.'s user avatar
  • 88.9k
1 vote
Accepted

Continuous-time convolution of signals with negative amplitudes

My question is, what is the correct way of dealing with this kind of signals, does the negative amplitude effect the results and does it change the output of LTI system, am I right or mistaken? You ...
Hilmar's user avatar
  • 42.5k
1 vote

Filtering in time domain vs filtering in frequency domain

QUESTION : Why is the output signal shifted in time domain? Is this because multiplication in frequency domain corresponds to convolution in time domain? A windowed sync is non-causal. In order to be ...
Hilmar's user avatar
  • 42.5k

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