Rocha, Raissa Bezerra: - Raissa Bezerra Rocha was born in Campina Grande, PB, Brazil, in 1984. She received the B.E., M.S. and doctoral degrees in Electrical Engineer- ing from the Federal University of Campina Grande, in 2010, 2012 and 2017, respectively. She is currently managing director of the Institute for Advanced Studies in Communications and an adjunct professor at the Federal University of Sergipe, where she teaches disciplines in the areas of com- munications and signal processing. Her main areas of interest are communi- cations, voice processing, video, and biometric signals and communications circuits.

De Alencar, Raphael Tavares: - "Raphael Tavares de Alencar was born in Recife, Brazil, in 1988. He obtained his Bachelor Degree in Electrical Engineering Degree (Majors in Telecommunications and Power Systems), from the Federal University of Campina Grande, in 2012, and his Master's Degree in Electrical Engineering (Telecommunications) from the Federal University of Campina Grande, in ́ 2014. He also got involved in an international exchange program at the Ecole Nationale Supe ́rieure des Syste ́mes Avance ́s et Re ́seaux, (ESISAR), Valence, France, from 2010 to 2011. He worked as a consulting engineer in a project for Alpargatas (man- ufacturer and distributor of Havaianas sandals in the country), and his main activities included development, manufacture, installation, and testing of a security system to protect mill operators. The main tasks involved electronic and mechanical designs, image processing, sensors, and radiofre- quency systems testing. He also worked at the Laboratoire de Conception et d'Inte ́gration des Syste`mes (LCIS), in the development and manufacture of a chipless RFID reader. He was a researcher in a Project funded by RNP (National Research Network): "[CIA]2 - Building Intelligent Cities: from Environmental Instru- mentation to Application Development", developed at the Institute of Advanced Communications Studies (Iecom). His activities included mostly research, design, and simulation for optical communications and hybrid optical-wireless networks."

de Alenca, Marcelo Sampaio: - Marcelo Sampaio de Alencar was born in Serrita, Brazil, in 1957. He received his Bachelor degree in electrical engineering, from the Federal Uni- versity of Pernambuco (UFPE), Brazil, 1980, his Master's degree in electrical engineering, from the Federal University of Paraiba (UFPB), Brazil, 1988 and his Ph.D. from the University of Waterloo, Department of Electrical and Computer Engineering, Canada, 1993. He has 40 years of engineering experience, and 30 years as an IEEE Member, currently a senior member. Between 1982 and 1984, he worked for the State University of Santa Catarina (UDESC). From 1984 to 2003, he worked for the Department of Electrical Engineering, Federal University of Para ́ıba, where he was a full-time Profes- sor and supervised more than 60 graduate and several undergraduate students. From 2003 to 2017, he was Chair Professor at the Department of Electrical Engineering, Federal University of Campina Grande, Brazil. He also spent some time working for MCI-Embratel and the University of Toronto, as a visiting Professor. He was visiting Chair Professor at the Department of Electrical Engineering, Federal University of Bahia. He is the founder and president of the Institute for Advanced Stud- ies in Communications (Iecom). He has been awarded several scholarships and grants, including three scholarships and several research grants from the Brazilian National Council for Scientific and Technological Research (CNPq), two grants from the IEEE Foundation, a scholarship from the Uni- versity of Waterloo, a scholarship from the Federal University of Paraiba, an achievement award for contributions to the Brazilian Telecommunications Society (SBrT), an academic award from the Medicine College of the Federal University of Campina Grande (UFCG), and an achievement award from the College of Engineering of the Federal University of Pernambuco, during its 110th-year celebration. He is a laureate of the 2014 Attilio Giarola Medal. He published over 450 engineering and scientific papers and 24 books: Music science, Modulation Theory, Scientific Style in English, and Cellular Network Planning, by River Publishers, Spectrum Sensing Techniques and Applications, Information Theory, and Probability Theory, by Momentum Press, Information, Coding and Network Security (in Portuguese), by Else- vier, Digital Television Systems, by Cambridge, Communication Systems, by Springer, Principles of Communications (in Portuguese, by Editora Univer- sita ́ria da UFPB, Set Theory, Measure and Probability, Computer Networks Engineering, Electromagnetic Waves and Antenna Theory, Probability and Stochastic Processes, Digital Cellular Telephony, Digital Telephony, Digital, Television and Communication Systems (in Portuguese), by Editora Erica Ltda, History of Communications in Brazil, History, Technology and Legis- lation of Communications, Connected Sex, Scientific Diffusion, Soul Hicups (in Portuguese), byEpgraf Gra ́fica e Editora. He also wrote several chapters for 11 books.His biography is included in the following publications: Who's Who in the World and Who's Who in Science and Engineering, by Marquis Who's Who, New Providence, USA.