1. Department of Electrical Engineering, Politeknik Sultan Abdul Halim Mu’adzam Shah, Jitra, Malaysia
2. Faculty of Electronic Engineering Technology, Universiti Malaysia Perlis (UniMAP), Arau, Malaysia
3. Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia, Parit Raja, Malaysia
4. School of Electronic Engineering and Computer Science, Queen Mary University of London, London, U.K.