“…The some of most important of these studies are conducted by Nandi and Azzouz who have suggested analog modulation classification algorithms, digital modulation classification algorithms, and analog and digital modulation classification algorithms by using decision-theoretic and artificial neural network (ANN) (Wu et al, 2005;Azzouz & Nandi, 1996a, 1996b. In other automatic modulation classification studies, different methods such as statistical pattern classification, spectrum monitoring applications, and intercepted signal filtering are used for automatic modulation classification (Dubuc & Boudreau, 1999;Lopatka & Pedzisz, 2000;Wong & Nandi, 2001;Wu et al, 2005).…”