An implementation of a normalized ARMA lattice filter with a CORDIC algorithm

In this paper we present a method of implementation of a normalized ARMA la ttice filter using a CORDIC algorithm. Expansion of a previously proposed n ormalized AR lattice filter using the CORDIC algorithm for the purposes of its application to the normalized ARMA lattice filter is difficult due to p roblems related to the convergence magnitude of the rotation angle and the convergence speed. In this paper we demonstrate the possibility of overcomi ng the above-mentioned problems and of implementing a CORDIC ARMA lattice f ilter. Since the filter proposed in this work is implemented based on the C ORDIC algorithm specifically adapted for the realization of the normalized ARMA lattice filter, it can be expected that it can be successively impleme nted in the form of a VLSI array. In addition, since such a filter performs the filtering by predicting the input signal, it can be used for the proce ssing of unknown signals. This article also contains estimations of the eff ectiveness of the proposed method by experiments. (C) 2000 Scripta Technica .