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Results tagged with homework
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user 923
Homework means the asker is requesting help with school homework. This lets potential answerers know that they should guide the student in solving the problem, rather than simply showing the complete answer.
1
vote
Intro Question to Signal Processing (Low-Pass Filter)
Based on your description it sounds like the idea is to use the FFT to figure out where your signal energy is in terms of frequencies. Once you know that you know what the passband of your filter sho …
- 12.2k
5
votes
Accepted
defining the frequency range with fast fourier transform
There are a few things going on here. First, one of the fundamental properties of the Fourier transform is that it conserves energy, i.e. the energy of the time domain is exactly equal to the energy …
- 12.2k
2
votes
Accepted
Erosion in image
You are correct. Erosion of that image with that structuring element should cause all of the 1's to disappear.
There are two ways to look at it. One is that only ones that are surrounded by ones wi …
- 12.2k
1
vote
Obtaining the Impulse response from the frequency of a discrete system
Impulse responses can be continuous or discrete, just like there are continuous and discrete versions of the Fourier transform. Since this is a discrete system, giving a discrete impulse response is …
- 12.2k
5
votes
period of this signal
You are mostly correct. The equation should be $w(t) = sin(2\pi\frac{1}{20}t)$. The variable in the sin should be $t$, not $f$. The frequency is determined by the $\frac{1}{20}$, not by the variabl …
- 12.2k