[1] Section of Information Combat Command, Dept. of Information Countermeasure, Radar Academy of Air Force, Wuhan 430019, China
[2] Maintenance Engineering Inst., Dept. of Equipment Command and Management, Mechanism Engineering Coll., Shijiazhuang 050003, China
[3] Section of Software Engineering, Dept. of Computer Engineering, Mechanism Engineering Coll., Shijiazhuang 050003, China