1. College of Communication and Electronic Engineering, Qiqihar University, Qiqihar 161000, China
2. College of Information and Engineering, Huzhou University, Huzhou 313000, China
3. College of Information and Communication Engineering, Dalian Nationalities University, Dalian 116000, China
4. College of Computer and Control Engineering, Qiqihar University, Qiqihar 161000, China