“…These information is very useful for target recognition, thus recently the researchers have focused their interest on radar target recognition using HRRP (Li and Yang, 1993;Zyweck and Bogner, 1996;Eom and Chellappa, 1997;Rosenbach and Schiller, 2000;Jacobs and Sullivan, 2000;Huther et al, 2001;Shaw et al, 2000;Wu et al, 2002;Du et al, 2006;Suvorova and Schroeder, 2002;Kim et al, 2002;Zwart et al, 2003;Nelson et al, 2003;Wong, 2004;Shi and Zhang, 2001;Liao et al, 2002;Mitchell and Westerkamp, 1999). Invariant features for HRRP were studied in Suvorova and Schroeder (2002), Kim et al (2002), Zwart et al (2003).…”