1. Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar, Perak, Malaysia
2. Faculty of Electrical and Electronic Engineering, University Tun Hussein Onn, Parit Raja, Johor, Malaysia
3. Wireless Communication Centre, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia
4. Department of Electronics Communication Engineering, Faculty of Engineering Petroleum, Hadhramout University, Al Mukalla, Hadhramout, Yemen