1. Key Laboratory of Universal Wireless Communication, MOE, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing, China
2. School of Information and Electronics, Beijing Institute of Technology, Beijing, China
3. Department of Satellite Application Research, China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing, China
4. School of Computing Engineering and Mathematical Sciences, La Trobe University, Melbourne, VIC, Australia