Zhao Linjing was born in 1976. She received B. S., M. S. and Ph.D. degrees from Xidian University in 1998, 2003, and 2008, respectively. Her research interests include broadband wireless communications, software radios, and OFDM. E-mail:ljzhao@mail. xidian.edu.cn Lu Zhuo was born in 1980. He received B. S., M. S. and Ph. D. degrees from Xidian University in 2002, 2005 and 2007, respectively. His research interests inelude wireless communication theory, detection and estimation theory. Li Jiandong was born in 1962. Now he is a professor, Ph.D. student supervisor, Dean of School of Telecommunication Engineering, and Director of State Key Lab of Integrated Service Networks, Xidian University. He is a senior member of IEEE and China Institute of Electronics (CIE) and the fellow of China Institute of Communication (CIC). He is also the member of Communication specialist group for The Ministry of Information Industry. His interests include broadband wireless communications/networks, ad hoc networks, and software radio.