1. School of Information Science and Engineering, Chongqing Jiaotong University, Chongging, China
2. Anhui Provincial Engineering Research Center for Unmanned System and Intelligent Technology, Engineering Research Center of Autonomous Unmanned System Technology of Ministry of Education, Anhui University, Hefei, China
3. School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu, China
4. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications (CQUPT), Chongqing, China
5. School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA