YOUNG-JO KO received the B. S., M. S. and Ph. D. degrees in physics from Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea, in 1992, 1994, and 1998, respectively. He joined Electronics and Telecommunications Research Institute (ETRI) in March, 1998. Since 2002, he has been working on mobile communications at ETRI. From 2005 to 2014, he participated in the development of early versions of LTE/LTE-Advanced systems and also participated in the 3GPP standardization of LTE/LTE-Advanced as a main delegate of ETRI. He is currently Director of 6G Wireless Technology Research Section in Mobile Communication Research Division at ETRI, and serves as Chairman of the 6G Technology Committee of 5G Forum in Korea. His research interests include 5G New Radio and beyond, and 6G technologies, with main focus on the physical layer aspects of radio access.