Discrete Fourier Transform and its Derivatives
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In this chapter, we provide basics of integral Fourier Transform and present discrete transforms
originated from this very basic signal transform. We consider different versions of the Discrete Fourier Transform
(DFT) that can be obtained in different conditions of signal sampling and introduce, as its important special case,
Discrete Cosine Transform that proved to serve as an ideal substitution to DFT in all its applications.
Dept. of Physical Electronics, School of Electrical Engineering, Tel Aviv University, Tel Aviv 69978, Israel.