Dr. Francisco Rubén Castillo-Soria received his M. Sc. in Telecommunications Engineering from IPN-ESIME, Mexico, in 2004 and his Ph. D. degree in Electronics and Telecommunications from the CICESE Research Center, Ensenada, Mexico in 2015. Since 2017, he has been a Research-Professor at the Autonomous University of San Luis Potosí, SLP, México. His current research interests include MIMO wireless communications, signal processing, spatial/index modulation, and modeling of multiuser MIMO-OFDM systems. He is a member of the National Research System. level 1.