7. Discrete-Time Fourier Transform Demos - MATLAB 2

A table of DTFT pairs is usually given as a list of formulas for the signal \(x[n]\) and its DTFT \(X(e^{j \hat\omega})\). These formulas can be visualized as plots, and this demo focuses on the ability to recognize signals and transforms in a graphical form.
The Filter Design Demo is a program that designs simple FIR (and IIR) digital filters, along with tutorial visualizations of the filter design process.


  • FIR Design with many different window types
  • Numerous plot options: magnitude/phase response, pole-zero diagram, and impulse response
  • IIR Design of Butterworth filters
  • Parks-McClellan FIR Design showing the iterations of the Remez Exchange method