Timeline for What effect does a delay in the time domain have in the frequency domain?
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 7, 2023 at 13:09 | answer | added | mins | timeline score: 1 | |
| Aug 22, 2018 at 20:08 | history | edited | Laurent Duval | CC BY-SA 4.0 | minor typo editing |
| Aug 22, 2018 at 19:47 | answer | added | aman deep | timeline score: 2 | |
| Jan 4, 2012 at 19:10 | vote | accept | gallamine | ||
| Oct 30, 2011 at 15:40 | history | edited | Jason R | CC BY-SA 3.0 | rephrased title as a question |
| Oct 28, 2011 at 8:20 | history | tweeted | twitter.com/#!/StackSignals/status/129789596379774976 | ||
| Oct 26, 2011 at 17:22 | comment | added | Dilip Sarwate | If you pass the last $N$ of the $N+100$ samples to your $N$-point FFT subroutine, you will get the same FFT as you got before. No difference whatsoever. If you pass the first $N$ of the $N+100$ samples (with the first $100$ samples being $0$) to your $N$-point FFT subroutine, you will get things that are difficult to interpret. Read the Answer by @JasonR carefully which tells you that if the first $100$ samples are filled from your data via a circular or cyclic shift, then you will see the delay reflected in the phase of the samples. | |
| Oct 26, 2011 at 17:12 | comment | added | gallamine | @Dilip I'm looking for a more general answer. Perhaps an explanation of what would change in those scenarios would be helpful? | |
| Oct 26, 2011 at 16:10 | answer | added | Spacey | timeline score: 3 | |
| Oct 26, 2011 at 13:44 | answer | added | Jason R | timeline score: 27 | |
| Oct 26, 2011 at 13:37 | comment | added | Dilip Sarwate | It depends on what you mean by FFT. Say your original signal had $N$ time samples. Suppose the delay is $100$ samples. So now you have $N+100$ samples with the first $100$ being $0$. Are you computing the FFT of the first $N$ samples (same as before)? of the $N+100$ samples? of the last $N$ of the $N+100$ samples? The answer will depend on what you mean by FFT... | |
| Oct 26, 2011 at 12:26 | history | asked | gallamine | CC BY-SA 3.0 |