[1] Univ Patras, Elect Lab, Dept Phys, GR-26504 Rion, Greece
[2] Univ Sharjah, Coll Engn, Elect & Comp Engn Dept, PO 27272, Sharjah, U Arab Emirates
[3] Univ Sharjah, Coll Engn, Dept Sustainable & Renewable Energy Engn, PO 27272, Sharjah, U Arab Emirates
[4] Tallinn Univ Technol, Sch Informat Technol, Dept Comp Syst, EE-19086 Tallinn, Estonia