Timeline for Zero-padding the middle of a signal
Current License: CC BY-SA 3.0
8 events
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| Jul 15, 2016 at 16:45 | comment | added | Adam Francey | Interesting, with the time-shift property it can be shown that the magnitude of the DFT is the same if I time-shift the zero-padded middle to the end of the sequence. | |
| Jul 11, 2016 at 0:57 | comment | added | Dan Boschen | I see now, thank you. My err was to test quickly with freqz instead of fft directly; freqz pads out the fft to a longer number of samples (so computed the fft of two very different cases as opposed to a simple rotational shift). | |
| Jul 11, 2016 at 0:25 | comment | added | hotpaw2 | Look up the time-shift or time shifting property of the FFT. | |
| Jul 10, 2016 at 19:54 | comment | added | Dan Boschen | I don't think this is true: That it would still be a sinc function; just compare the two in Matlab/Octave: freqz([1 1 1 1 1 1 1 1 1 1 0 0 0 0 0]) to freqz([1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1]) and you can see that the magnitude as well as phase is immediately distorted by the rotation. | |
| Jul 10, 2016 at 14:56 | history | edited | hotpaw2 | CC BY-SA 3.0 |
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| Jul 10, 2016 at 14:50 | history | edited | hotpaw2 | CC BY-SA 3.0 |
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| Jul 10, 2016 at 14:10 | history | edited | hotpaw2 | CC BY-SA 3.0 |
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| Jul 10, 2016 at 14:05 | history | answered | hotpaw2 | CC BY-SA 3.0 |