[1] Dept. of Elec. and Comp. Engineering, Concordia University, 1455 De Maisonneuve Blvd. W., Montreal, Que. H3G 1M8, Canada
[2] University of Illinois, Urbana-Champain, IL, United States
[3] University of Michigan, Dearborn, MI, United States
[4] Concordia University, Montreal, Que., Canada
[5] Dept. of Elec. and Comp. Engineering