In this experiment we had to perform DFT of 4 point and 8 point signal and also we had to conclude the effect of zero padding on magnitude spectrum .
So after performing 4 point and 8 point DFT , what I observed was the as N increases , the frequency spacing reduces . Also the approximation error in representation of the spectrum decreases . Resolution of spectrum increases and hence visual appearance of spectrum quality improves . The missing values in 4 point DFT are present in 8 point DFT
Link of the code ;https://drive.google.com/drive/folders/0BwYB93kRygZnT1E1MUNaZXh4RGM
Spacing between the values reduces as the value of N increases. By appending the input sequence by zeros the resolution error reduces.
ReplyDeleteby appending more zeroes, the missing values in less point DFT are present in the DFT with more point.
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