1. School of System and Engineering, Sun Yat-sen University, Guangzhou, China
2. School of Aeronautics and Astronautics, Sun Yat-sen University (Shenzhen Campus), Shenzhen, China
3. School of Information and Communication Engineering, Sun Yat-sen University (Shenzhen Campus), Shenzhen, China
4. School of Information and Communication Engineering and the Shenzhen Key Laboratory of Navigation and Communication Integration, Sun Yat-sen University (Shenzhen Campus), Shenzhen, China