Discrete Fourier Transform

Part of the Undergraduate Lecture Notes in Physics book series (ULNP)


The Fourier transform is an integral of the product of a signal (waveform) to be analyzed and a complex exponential function with an arbitrary frequency (see Eq. ( 2.37)). In theoretical discussions, it is possible to deal with continuous functions. However, since a continuous function requires an infinite number of points to describe, it is not suitable for a numerical analysis using a digital computer.


Sine Aliasing IDCT 

Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Yokohama-shiJapan

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