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Robert Lacoste's The Darker Side by Robert Lacoste

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Chapter 6 The Fast Fourier Transform from A to Z

Before digging into the topic of digital filters in the next chapters, let’s start by refreshing our neurons on the Fourier transform. As you may have noticed, I’m French, so I can’t resist telling you that Jean Baptiste Joseph Fourier (1768–1830) was a French mathematician and physicist. His life was quite busy. He was deeply involved in the French Revolution and kept his head on his shoulders only by chance. He then went with Napoleon during his expeditions and became governor of Lower Egypt. Later he returned to Europe and to science and published his well-known paper on thermodynamics in 1822, which brings us back to our subject.

Before digging into the topic of digital filters in the next ...

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