Frequency-Domain Modeling

Some operations that are very complicated in the time domain (like linear filtering, also called convolution ) become simple in the frequency domain. That's one good reason for learning about frequency-domain analysis.

The other reason to use frequency-domain simulation is because it gives you incredible control over the exact form of frequency-dependent losses, like the skin effect and dielectric-loss effect. Because the frequency-domain method may be easily programmed in any software spreadsheet application (like MatLab, Mathematica, or MathCad), you can control any aspect of the simulation, including searching for optimum and worst-case parameter values. For the analysis of a single, long, serial high-speed digital interconnection, especially if the link is terminated at both ends so it adheres to the properties of linearity and superposition, the frequency-domain method may be your best alternative.