1. Electrical and Electronics Department Kyushu Institute of Technology Tobata Ward Kitakyushu Fukuoka Japan
2. Faculty of Engineering Graduate School of Engineering Mie University Tsu Mie Japan
3. Infrastructure Systems Research and Development Center Toshiba Infrastructure Systems and Solutions Corporation Saiwai‐ku Kawasaki Kanagawa Japan
4. TIPS Mie Operation TOSHIBA Industrial Products and Systems Corporation Saiwai‐Ku Kawasaki Mie Japan