Available under Creative Commons-ShareAlike 4.0 International License. Introduction to the Frequency Domain Complex Fourier Series Classic Fourier Series A Signal's Spectrum Fourier Series Approximation of Signals Encoding Information in the Frequency Domain Filtering Periodic Signals Derivation of the Fourier Transform Linear Time Invariant Systems Modeling the Speech Signal Frequency Domain Problems Solutions to Exercises in Chapter 4 ‹ previous up next › 2006 reads