1. Beijing Key Laboratory of Work Safety Intelligent Monitoring, School of Electronic EngineeringBeijing University of Posts and TelecommunicationsBeijing100876People's Republic of China
2. Center for Advanced Vehicle and Extreme Environment Electronics (CAVE3)Auburn UniversityAuburnAL36849USA
3. State Key Laboratory of Information Photonics and Optical Communication, School of Electronic EngineeringBeijing University of Posts and TelecommunicationsBeijing100876People's Republic of China