Fourier Transform (spectrum)
Fourier Transform (spectrum) :
An integral transform mapping signals defined in the time domain f(t) into the complex frequency domain F(ω) by multiplying exp(iωt) and integrating over t from minus infinity to plus infinity. The Fourier spectrum consists of two complementary parts, the amplitude-frequency and the phase frequency spectrum. See equation (4.2) in Chapter 4 of this Manual as well as Scherbaum (2002), and the biography of Jean Baptiste Joseph Fourier in Howell (2003)
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