Timeline for Sampling Theorem and reconstruction
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 27, 2021 at 22:56 | vote | accept | Kinka-Byo | ||
| Mar 25, 2019 at 10:53 | comment | added | AndrejaKo | It says that...if the sampling frequency is higher than twice the maximum frequency of the initial signal It most certainly does not. Don't confuse the frequency and bandwidth. | |
| Mar 25, 2019 at 10:17 | answer | added | Mr.Sh4nnon | timeline score: 1 | |
| Mar 25, 2019 at 6:28 | answer | added | Gutenberg | timeline score: 0 | |
| Mar 25, 2019 at 6:00 | history | tweeted | twitter.com/StackElectronix/status/1110058888324362240 | ||
| Mar 25, 2019 at 1:04 | history | became hot network question | |||
| Mar 24, 2019 at 22:42 | comment | added | Kevin White | Also note that in practice it may require higher sampling frequency to provide acceptable reconstruction since perfect band-limiting are not practical. For example Audio CDs use 44.1kHz sampling to provide 0-20kHz output. Oscilloscopes generally use 5-10 times the required minimum sampling frequency to provide acceptable waveform integrity as a sharp cutoff filter would tend to create waveform artifacts such as ringing. | |
| Mar 24, 2019 at 22:13 | comment | added | Neil_UK | it's important to note that unique reconstruction is only possible if the original signal is strictly bandlimited. Or to put it another way, given the samples, the assumption of strict bandlimiting allows a single signal to be reconstructed. To the extent that the bandlimited assumption is untrue, then the reconstructed signal will not match the original - this is called aliasing. | |
| Mar 24, 2019 at 21:53 | answer | added | Dave Tweed | timeline score: 7 | |
| Mar 24, 2019 at 21:22 | answer | added | TimWescott | timeline score: 1 | |
| Mar 24, 2019 at 21:15 | comment | added | Dan Mills | There is exactly ONE curve that passes thru all those points AND is band limited to strictly less then Fs/2. | |
| Mar 24, 2019 at 21:14 | comment | added | Hearth | Your bottom signal has some much higher frequency components than the other ones here. | |
| Mar 24, 2019 at 21:11 | history | asked | Kinka-Byo | CC BY-SA 4.0 |