Jong Yeol Ryu received a B.E. degree from Chungnam National University, Daejeon, South Korea, in 2008, and his M.S. and Ph.D. degrees from the Korea Advanced Institute of Science and Technology, Daejeon, in 2010 and 2014, respectively, all in electrical engineering. From 2014 to 2016, he was a Postdoctoral Fellow with the Singapore University of Technology and Design. He is currently an Associate Professor with the Department of AI Information Engineering, Gyeongsang National University, Jinju, South Korea. His current research interests are covert communication systems and cell-free MIMO networks.

Jung Hoon Lee received his B.S. and M.S. degrees in electrical communications engineering and the Ph.D. degree in electrical engineering from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea, in 2006, 2008, and 2013, respectively. He was a Postdoctoral Research Scholar at KAIST from September 2013 to April 2014 and a Postdoctoral Research Scholar at North Carolina State University, Raleigh, NC, from August 2014 to August 2015. From September 2015 to August 2016, he was an Assistant Professor in the Department of Electronic Engineering, Jeju National University, Jeju, Korea. He is currently an Associate Professor of the Department of Electronics Engineering, Hankuk University of Foreign Studies, Yongin, Korea. He was named Exemplary Reviewer of the IEEE TRANSACTIONS ON COMMUNICATIONS in 2015. His research interests include interference management, limited feedback, machine learning, and signal processing in communication theory and information theory.