Improvement of spectral resolution by signal padding method in the spatially modulated Fourier transform spectrometer based on a Sagnac interferometer
![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
![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
![Life | Free Full-Text | Improving the Effective Spatial Resolution in 1H-MRSI of the Prostate with Three-Dimensional Overdiscretized Reconstructions Life | Free Full-Text | Improving the Effective Spatial Resolution in 1H-MRSI of the Prostate with Three-Dimensional Overdiscretized Reconstructions](https://pub.mdpi-res.com/life/life-13-00282/article_deploy/html/images/life-13-00282-g001.png?1674120544)
Life | Free Full-Text | Improving the Effective Spatial Resolution in 1H-MRSI of the Prostate with Three-Dimensional Overdiscretized Reconstructions
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
![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)