1. Department of Fundamental Sciences, National Advanced School of Mines and Petroleum Industries, University of Maroua, P. O. Box 46, Maroua, Cameroon
2. Center for Systems Design, Chennai Institute of Technology, Chennai 600069, Tamilnadu, India
3. Department of Physics, Faculty of Science, University of Ngaoundere, P.O. Box: 454, Ngaoundere, Cameroon
4. Department of Telecommunication and Network Engineering, IUT-Fotso Victor of Bandjoun, University of Dschang, P. O. Box: 134, Bandjoun, Cameroon
5. Department of Mechanical, Petroleum and Gas Engineering, National Advanced School of Mines and Petroleum Industries, University of Maroua, P. O. Box 46, Maroua, Cameroon
6. Electrical and Engineering, Telecommunications Department, National Advanced School of Engineering, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon