Generation of causal and semicausal 2‐D IIR structures from fir structures via state feedback
D. Lehner, Rolf Unbehauen · International Journal of Circuit Theory and Applications · 1987
Abstract A method is presented to realize a class of 2‐D IIR digital filters by extension of 2‐D FIR structures through feedback paths. Most features of the initial FIR structures remain unchanged (e.g. parallelism, number of delay elements). the approach described is applied to a class of 2‐D FIR filter structures owning several advantages. the method is generalized to semicausal filters.