1. School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo, China
2. Institute of Sensors, Signals and Systems, Heriot-Watt University, Edinburgh, U.K.
3. School of Electronic Engineering and Computer Science, Queen Mary University of London, London, U.K.
4. Department of Applied Informatics, Silesian University of Technology, Gliwice, Poland