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can anyone explain what's the picket-fence effect for FFT?

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qslazio

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picket-fence effect

can anyone explain what's the picket-fence effect for FFT?
Thank in advance!
 

newelltech

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the picket-fence effect

Picket fence refers only to discrete transforms (DFT, etc.)
It means the frequency information is only accurate at specific, regular intervals (sometimes called bins) and if you take the DFT of an impulse, you'll see equal components at each frequency interval and it will look like a picket fence.
 

wwfhm2002

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what does picket fence look like fft

it is same as leakage caused by DFT length is not integer of signal frequency.
 
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