L. M. Tolbert, Y. Xu, J. Chen, and J. N. Chiasson are with the Department of Electrical and Computer Engineering, The University of Tennessee, Knoxville, TN 37996-2100 USA (e-mail: [email protected], [email protected], [email protected], [email protected]). F. Z. Peng is with the Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI 48824-1226 USA (e-mail: fzpeng@m...