To increase the FFT resolution, we add zero padding to the end of sampled data. What if we didn't add the zeroes at the end of the data, but copy the same
![Effect of changing sample rate, window duration and zero padding on DTFT and DFT - Signal Processing Stack Exchange Effect of changing sample rate, window duration and zero padding on DTFT and DFT - Signal Processing Stack Exchange](https://upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Spectral_leakage_caused_by_%22windowing%22.svg/800px-Spectral_leakage_caused_by_%22windowing%22.svg.png)
Effect of changing sample rate, window duration and zero padding on DTFT and DFT - Signal Processing Stack Exchange
![Illustration of the effect of zero-padding. (a) 1-D rectangle function.... | Download Scientific Diagram Illustration of the effect of zero-padding. (a) 1-D rectangle function.... | Download Scientific Diagram](https://www.researchgate.net/publication/265043400/figure/fig5/AS:392127277223942@1470501836437/llustration-of-the-effect-of-zero-padding-a-1-D-rectangle-function-b-Magnitude.png)
Illustration of the effect of zero-padding. (a) 1-D rectangle function.... | Download Scientific Diagram
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![fft - Why do we say that "zero-padding doesn't really increase frequency resolution" - Signal Processing Stack Exchange fft - Why do we say that "zero-padding doesn't really increase frequency resolution" - Signal Processing Stack Exchange](https://i.stack.imgur.com/qSUV6.png)
fft - Why do we say that "zero-padding doesn't really increase frequency resolution" - Signal Processing Stack Exchange
![fft - Why do I have frequency leakage in DFT after zero padding if frequency resolution is fine? - Signal Processing Stack Exchange fft - Why do I have frequency leakage in DFT after zero padding if frequency resolution is fine? - Signal Processing Stack Exchange](https://i.stack.imgur.com/LHgOQ.png)
fft - Why do I have frequency leakage in DFT after zero padding if frequency resolution is fine? - Signal Processing Stack Exchange
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