1. Lijiang Water Network Company, Yunnan Infrastructure Investment Co., Ltd., Lijiang 650500, China
2. School of Electrical & Information Engineering, Wuhan Institute of Technology, Wuhan 430205, China
3. Institute of Ocean Information Technology, Shandong Jiaotong University, Weihai 264200, China
4. School of Navigation, Wuhan University of Technology, Wuhan 430063, China