Does zero padding change the actual frequency?
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I tried adding zeros to the end of a 10 Hz signal, by making it the double the length of original signal length, I know the resolution should increase in fft , (but not more accurate). But as I noticed the frequency shifts a bit as well towards 9,5 Hz , even if i zero padd even more it will still shift but slightly, is that normal? how can I solve it? and is there a limit to the amount of zero padding needed? are there any drawbacks with zero padding?
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Image Analyst
2014-7-12
How many elements per second do you have along the time axis? Can you show your code?
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Azzi Abdelmalek
2014-7-12
0 个投票
When you add zeros to your signal you get a new different signal, obviously, its fft will be different
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2014-7-12
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