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Understanding the Discrete Fourier Transform and the FFT

 The discrete Fourier transform (DFT) transforms discrete time-domain signals into the frequency domain. The most efficient way to compute the DFT is using a fast Fourier transform (FFT) algorithm. 

This Tech Talk answers a few common questions that are often asked about the DFT and the FFT. It covers an overview of the algorithm where you’ll be walked through an understanding of why you might look at the absolute value of the FFT, how bin width is calculated, and what the difference is between one-sided and two-sided FFTs.

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