Sung Sik Nam received the B.S. and M.S. degrees in Electronic Engineering from Hanyang University, Korea, in 1998 and 2000, respectively. Also, he received the M.S. degree in Electrical Engineering from University of Southern California, USA, in 2003, and the Ph.D. degree at Texas A&M University, College Station, USA, in 2009. From 1998 to 1999, he worked as a researcher at ETRI, Korea. From 2003 through 2004, he worked as a manager at the Korea Telecom Corporation, Korea. From 2009 to 2010 and from 2011 to 2013, he was with Hanyang University and Sungkyunkwan University, Korea, respectively. From 2013 to 2016, he was with Hanyang University, Korea. From 2017 to 2019, he was with Korea University, Korea before joining Gachon University, Korea as an assistant professor of Department of Electronic Engineering in 2020. His research interests include the design and performance analysis of wireless communication system, diversity techniques, power control, multiuser scheduling, cooperative communications, energy harvesting, and wireless optical communication.