1. School of Electrical Engineering Faculty of Engineering Universiti Teknologi Malaysia Johor Bahru Johor 81310 Malaysia
2. Department of Electrical and Electronic Engineering University of Nottingham Malaysia Jalan Broga Semenyih Selangor 43500 Malaysia
3. Department of Electronic Engineering Faculty of Electrical and Electronic Engineering Universiti Tun Hussein Onn Malaysia Parit Raja Johor 86400 Malaysia