Qian Bin was born in 1973. He is working towards Ph.D. degree in College of Electronic Engineering, University of Electronic Science and Technology of China. His research interests include smart antenna and array signal processing. E-mail: qianbinuestc@sohu.com Yang Wanlin was born in 1951. He is a professor and doctoral director supervisor in College of Electronic Engineering, University of Electronic Science and Technology of China. His interests include radar signal processing and radar imaging. Wan Qun was born in 1971. He is a professor and doctoral director supervisor in College of Electronic Engineering, University of Electronic Science and Technology of China. His interests include array signal processing, radar imaging and moving object orientation.