Pang Jiyong was born in 1981. He is a Ph. D. candinate in Xidian University. His current research interests mainly focus on broadband wireless communications, especially on MIMO systems. E-mail: pjy1121@163.com Li Jiandong was born in 1962. Now he is a professor, Ph. D. student supervisor, Dean of Graduate School, and Director of State Key Lab of Integrated Service Networks, Xidian University. His interests include broadband wireless communications, ad hoc networks, and software radio. E-mail: jdli@mail.xidian.edu.cn Lu Zhuo was born in 1980. He is currently a Ph. D. candidate in Xidian University and his research interests include wireless communication theory, detection and estimation theory. E-mail:zlu@pcn.xidian.edu.cn Zhao Linjing was born in 1976. She is a Ph. D. candiate in Xidian University. Her research interests include frequency offset estimation and software defined radio. E-mail:ljzhao@pcn.xidian.edu.cn. Chen Liang was born in 1979. He is a Ph.D. candidate in Xidian University. His research interests include multiuser detection and system design. E-mail:lchen@pcn.xidian.edu.cn