Liu Congfeng was born in 1973. He received the B. S. and M. S. degrees from Electronic Engineering University, in 1996 and 1999, respectively. Currently, he is working toward the Ph. D. degree in the National Key laboratory of Radar Signal Processing at Xidian University. He had been worked as engineer at Xi'an Satellite Control Center for many years. He has been a faculty member of Xidian University since 2004, where he is currently an associate professor. His research interests focus on the applications of the signal processing on radar and communication. E-mail: efliu@mail.xidian.edu.cn Liao Guisheng received the B. S. degree from Guangxi University in 1985 and the M. S. and Ph. D. degrees from Xidian University, in 1990 and 1992, respectively. He joined the National Key Laboratory of Radar Signal Processing of Xidian University in 1992, where he is currently a professor and vice director of the laboratory. His research interests are mainly in statistical and array signal processing, signal processing for radar and communication, and smart antenna for wireless communication.