Discrete Fourier Transform (DFT): The most important math tool ever

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References:
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00:00 Introduction
2:10 Periodic Discrete Complex Exponential (The building block of dft)
8:02 The Main Idea of Discrete Fourier Transform
10:51 Discrete Fourier Transform (DFT) (Analysis Formula)
15:44 Inverse Discrete Fourier Transform (IDFT) (Synthesis Formula)
21:05 Conclusion
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The DSP Videos:    • Digital Signal Processing (DSP)