Charles Casimiro Cavalcante received the Ph.D. degree from UNICAMP, Brazil, in 2004. He was a visiting professor at Teleinformatics Engineering Department of Federal University of Ceará (UFC) and since November 2008 he is an Associate Professor at UFC. From August 2014 to July 2015, he was a visiting assistant professor in the CSEE department of UMBC, USA. He is a co-author of the book Unsupervised Signal Processing, published by CRC Press, and a co-editor of the book Signals and Images also published by CRC Press. Dr. Cavalcante is a Senior Member of the IEEE and Senior Member of the Brazilian Telecommunications Society (SBrT). He is currently the co-editor-in-chief of the Journal of Communications and Information Systems (JCIS). His main research interests are in signal processing for wireless communications, information geometry and statistical signal processing.