PPT Slide

Fourier Transforms*

• any signal is made up of components at various sinusoidal frequencies

• we can calculate:

  the amplitude of a signal at any time (time domain)
  
  the constituent frequencies of a signal at any time (frequency domain)

S(f) = s(t) e-j2öft dt

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s(t) = S(f) e+j2öft dt

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where j2 = -1

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