A transformation method of a CORDIC ARMA lattice filter for signal synthesis

This paper proposes a method to transform a CORDIC ARMA lattice filter, whi ch is originally realized for signal analysis, into a signal synthesis latt ice filter (CORDIC ARMA lattice synthesis filter). In order to perform such a transformation and then obtain the CORDIC ARMA lattice synthesis filter, we must implement the followings with CORDIC: (1) the structure of the alt ered lattice filter; and (2) an angle calculation module. However, we canno t achieve such an implementation as an extension of the CORDIC ARMA lattice filter algorithm. Therefore, this paper proposes CORDIC implementation sch emes for both the structure and module, and then we realize the CORDIC ARMA lattice synthesis filter. By using CORDIC processors, the elementary secti ons of the CORDIC ARMA lattice synthesis filter are efficiently implemented without any multipliers. Since the obtained signal synthesis lattice filte r consists of dedicated CORDIC processors, it keeps the advantage of the CO RDIC ARMA lattice filter, that is a simple structure.