Corresponding author.Tao Jian was born in 1980. He is a lecturer in Naval Aeronautical and Astronautical University. His interest includes radar signal detection. E-mail: iamjiantao @yahoo.com.cn You He was born in 1956. He is a professor in Naval Aeronautical and Astronautical University. His interests include radar detection and estimation theory. Feng Su was born in 1977. He is a lecturer of Naval Aeronautical and Astronautical University. His interest includes radar signal detection. E-mall: sufenghjhy@tom.com Changwen Qu was born in 1963. He is a professor of Naval Aeronautical and Astronautical University. His interest includes electronic countermeasure. E-mail: quchangwenhjhy @tom.com Dianfa Ping was born in 1965. He is a professor of Naval Aeronautical and Astronautical University. His interest includes electronic countermeasale. E-mail: pingdianfa@tom.com