SIMPLIFIED LATTICE REALIZATION OF FIR DIGITAL FILTERS

Lattice fitter is superior to its counterpart of direct structure in numerical properties and modularity etc., but it is more complex to realize. This paper suggests a simplified lattice structure for the realization of FIR digital filters, so that the hard-ware requirement is only half as many as that of the conventional lattice filter, comparable to that of the direct structure. The synthesis algorithms that transform the direct structure into the simplified lattice structure are tfiven. Furthermore, the lattice synthesis algorithms for linear phase FIR digital filters are simplified. The main results are illustrated by a practical example.