中文摘要：

Corresponding author.Kai Huo was born in 1983. He received the B.S. degree in communication engineering in 2005 from National University of Defense Technology （NUDT）, China. Currently he is working towards the Ph.D. degree in electrical engineering at NUDT. His research interests include radar signal processing and feature extraction. E-mail： huokai2001 @ 163.com Bin Deng was born in 1981. He received the B.S. and M.S. degrees from National University of Defense Technology （NUDT） in 2003 and 2006, respectively. Currently he is working towards the Ph.D. degree in signal and information processing at NUDT. His research interests include radar waveform design, moving target detection, and velocity measurement. E-mail：julyseawind@ 163.com Yongxiang Liu was born in 1976. He received the B.S. and Ph.D. degrees from National University of Defense Technology （NUDT） in 1998 and 2004, respectively. He is currently an associate professor in Institute of Space Electronic Technol- ogy in School of Electronic Science and Engineer- ing, NUDT. His research interests include radar signal processing, feature extraction, and automation target recognition. E-mail：lyx_bible @ sina.com Weidong Jiang was born in 1968. He received the B.S. and Ph.D. degrees from National University of Defense Technology （NUDT） in 1991 and 2001, respectively. He is currently a professor in Institute of Space Electronic Technology in School of Electronic Science and Engineering, NUDT. His research interests include radar signal processing, radar system and automation target recognition. E-mail：jwd2232 @ vip.sina.com Junjie Mao was born in 1943. He is a professor of School of Electronic Science and Engineering, National University of Defense Technology. His research interests include millimeter radar, radar seeker, and antenna design. E-mail：maojunjie @ sina.com