1. School of Electronics and Information Engineering, Shenzhen University, Shenzhen, China
2. Department of Information Sciences, University of Education, Lahore, Pakistan
3. Department of Software Engineering, University of Gujrat, Gujrat, Pakistan
4. Universidad Europea del Atlántico, Santander, Spain
5. Department of Signal Theory and Communications and Telematics Engineering, University of Valladolid, Valladolid, Spain
6. Department of Information and Communication Engineering, Yeungnam University, Gyeongsan, South Korea