Affiliation: | aThe Department of Electronics and Telecommunications Engineering, King Mongkut's University of Technology, Thonburi, 91 Suksawads 48 Rd., Bangkok 10140, Thailand bThe Department of Electrical and Computer Engineering, The University of Auckland, Private Bag 92019 Auckland, New Zealand cThe Division of Mathematics and Statistics, School of Technology, University of Glamorgan, Pontypridd, Wales CF37 1DL, UK |