1. Department of Electrical and Electronic Engineering, College of Technology, University of Buea, Buea, Cameroon; Division of Information and Communication Technology, National Advanced School of Post, Telecommunication and ICT, University of Yaounde I, Yaoundé, Cameroon
2. Division of Information and Communication Technology, National Advanced School of Post, Telecommunication and ICT, University of Yaounde I, Yaoundé, Cameroon
3. Division of Information and Communication Technology, National Advanced School of Post, Telecommunication and ICT, University of Yaounde I, Yaoundé, Cameroon; Department of Computer Science, National Advanced School of Engineering of Yaoundé, University of Yaounde I, Yaoundé, Cameroon