1. School of Information and Communication Engineering University of Electronic Science and Technology of China Chengdu P. R. China
2. College of Electronic Engineering Chengdu University of Information Technology Chengdu P. R. China
3. Department of Electronics & Communication Engineering Hadhramout University Al‐Mukalla Yemen
4. Department of Electrical and Computer Engineering University of Waterloo Waterloo Canada
5. College of Medical Information Engineering Chengdu University of Traditional Chinese Medicine Chengdu China