On the automated symbolic design of wave digital filters

An experimental software tool has been developed for the automated symbolic design of state-space wave digital filters (WDFs) using exact behavior-preserving transformations. This software tool supports in particular the design of essentially equivalent state-space WDFs based on analog LC ladder reference filters. However, it can also be used to generate other kinds of state-space filters. The symbolic derivation of the state-space WDFs is advantageous, since it simplifies later computation-intensive optimizations (e.g., filter coefficient optimization) and limits numerical error-propagation effects