In this chapter, you will learn the basics of transforming a signal from the time domain into the frequency domain.
Learn about the Discrete Fourier Transform (DFT) and the Fast Fourier Transform (FFT).
Determine the frequency spacing between the samples of the FFT (that is, the relationship between the sampling frequency fs, number of samples N, and the frequency spacing Δf).
Familiarize yourself with the power spectrum and how it differs from both the DFT and the FFT.
Understand how to interpret the information in the frequency domain for the DFT/FFT and the power spectrum, for both even and odd N.