Wave Digital Filters

A Wave digital filter (WDF) is a particular kind of digital filter (or finite difference scheme) based on physical modeling principles.

• Developed to digitize lumped electrical circuit elements:
  • inductors
  • capacitors
  • resistors
  • gyrators, circulators, etc., (classical circuit theory)
• Each element is digitized by the bilinear transform
• Wave variables are used in place of physical variables (new), yielding superior numerical properties.
• Element connections involve wave scattering