[1] COMSATS Univ Islamabad, Dept Elect & Comp Engn, Wah Campus, Wah Cantt 47040, Pakistan
[2] Munster Technol Univ MTU, Dept Comp Sci, Cork T12 P928, Ireland
[3] Univ Essex, Sch Comp Sci & Elect Engn, Colchester CO4 3SQ, Essex, England
[4] Univ Bourgogne Franche Comte, Dr EA1859, F-58000 Nevers, France
[5] Univ Sherbrooke, Dept Elect & Comp Engn, Sherbrooke, PQ J1K 2R1, Canada
[6] Auburn Univ, Dept Elect & Comp Engn, Auburn, AL 36849 USA