An Efficient Scheme for Transmit Antenna Diversity with Limited Feedback Channel Rate. - Seung Hoon Shin; Bong Kwan Cho; Hyeon Chyeol Hwang; Kyung Sup Kwak (IEICE Trans. Commun., 2005)

Adaptive Linear Detectors in Space-Time Block Coded Multiuser Systems. - Hyeon Chyeol Hwang; Seung Hoon Shin; Seok Ho Kim; Kyung Sup Kwak (IEICE Trans. Commun., 2006)

Technical challenges of railroad communications using long term evolution. - Ronny Yongho Kim; Jin Sam Kwak; Hyeon Chyeol Hwang (ICTC, 2012)