Timeline for Phase Spectrum in Fourier Transform
Current License: CC BY-SA 4.0
14 events
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| Aug 6, 2020 at 22:03 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jul 7, 2020 at 22:46 | comment | added | Cedron Dawg | Perhaps Nathan has an answer for "What is the angle of 0+0i?" For a pure tone with a whole number of cycle in the frame, the off value bins will be zero theoretically and some meaningless error value numerically. | |
| Jul 7, 2020 at 22:43 | comment | added | Muhammed Mahmood | According to explanation by Nathan there should be essentially 0 phase angle because this being a pure sinewave with no phase shift. The idea of this being an issue with sampling rate makes sense but I'm confused now. Explanation by Nathan suggested my phase spectrum might be wrong | |
| Jul 7, 2020 at 22:42 | comment | added | Cedron Dawg | The second cited equation. Numbers in parentheses in academic papers are reference numbers of equations. | |
| Jul 7, 2020 at 22:41 | comment | added | Cedron Dawg | Who says you did anything wrong. Looking a Matlab code makes me go blind. You are better off in my opinion learning the DFT devoid of a Hz interpretation, it has to do with the sampling rate, not the behavior of the DFT. Print the magnitudes of the bins, don't plot them. Tell me they aren't effectively zero. | |
| Jul 7, 2020 at 22:40 | comment | added | Muhammed Mahmood | Sorry you lost me there where is (19) in your answer. | |
| Jul 7, 2020 at 22:37 | comment | added | Cedron Dawg | The half factor is correct. The other half is in the complex conjugate mirror image bin. This is because $$ \cos(\theta) = \frac{e^{i\theta}+e^{-i\theta}}{2}$$ See the 1/2 there? It is also there in (19) from my answer. | |
| Jul 7, 2020 at 20:18 | answer | added | hotpaw2 | timeline score: 0 | |
| Jul 7, 2020 at 18:26 | answer | added | Cedron Dawg | timeline score: 0 | |
| Jul 7, 2020 at 14:56 | answer | added | Nathan Huchon | timeline score: 1 | |
| Jul 7, 2020 at 14:50 | history | edited | A_A | CC BY-SA 4.0 |
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| Jul 7, 2020 at 14:25 | history | edited | Muhammed Mahmood | CC BY-SA 4.0 |
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| Jul 7, 2020 at 14:05 | review | First posts | |||
| Jul 7, 2020 at 14:42 | |||||
| Jul 7, 2020 at 14:05 | history | asked | Muhammed Mahmood | CC BY-SA 4.0 |