1. 30th Research Institute of China Electronic Technology Group Corporation, Beijing, China
2. Graduate School, Jose Rizal University, Mandaluyong City, Philippines
3. School of Information Engineering, Guangdong Innovative Technical College, Dongguan, China
4. Nan Yang Academy of Sciences (NASS), Beijing, China
5. Electrical and Electronics Engineering Department, University of Surrey, Guildford, U.K.