1. Ph.D. Candidate, Dept. of Electrical and Engineering, The City College of New York, 160 Convent Ave., New York, NY 10031.
2. Research Assistant, Dept. of Electrical and Engineering, The City College of New York, 160 Convent Ave., New York, NY 10031.
3. Professor, Dept. of Electrical and Engineering, The City College of New York, 160 Convent Ave., New York, NY 10031 (corresponding author).