1. Shanxi Key Laboratory of Signal Capturing & Processing, North University of China, Taiyuan 030051, China
2. The State Key Laboratory for Electronic Testing Technology, North University of China, Taiyuan 030051, China
3. School of Information and Communication Engineering, North University of China, Taiyuan 030051, China
4. North University of China, Taiyuan 030051, China
5. Noncommissioned Officer Academy of PAP, Hangzhou 311400, China
6. North Institute of Science and Technology Information, Beijing 100089, China