An efficient negative acknowledgment method for CDMA-based ranging in IEEE 802.16 OFDMA systems. - Namsuk Lee; Yong Seouk Choi; Sookjin Lee; Nam Kim (IEEE Commun. Lett., 2010)

A new CDMA-based bandwidth request method for IEEE 802.16 OFDMA/TDD systems. - Namsuk Lee; Yong Seouk Choi; Sookjin Lee; Nam Kim (IEEE Commun. Lett., 2010)

Improved heading estimation for smartphone-based indoor positioning systems. - Wonho Kang; Seongho Nam; Youngnam Han; Sookjin Lee (PIMRC, 2012)

Base station association schemes to reduce unnecessary handovers using location awareness in femtocell networks. - Nak Woon Sung; Ngoc-Thai Pham; Hyunsoo Yoon; Sookjin Lee; Won-Joo Hwang (Wirel. Networks, 2013)

GMPS(Group based multi-level packet scheduling) method in multi-beam based mobile communication system. - Sookjin Lee; Yong Seouk Choi (ICTC, 2015)

Performance Evaluation of Frequency Reuse and Scheduling Schemes for Dense Millimeter-Wave Multi-Beam eNodeB Architecture. - Minwoo Jeong; Yong Seouk Choi; Sookjin Lee (IEICE Trans. Commun., 2017)

Enhancement of Reliability and Availability for LTE-R based Train Control. - Byungsik Yoon; Sookjin Lee; Sangcheol Oh; Minsuk Choi; Sungchan Lee; Dongil Sung (ICTC, 2022)

Development of Wireless Communication System for LTE-R based Train Control. - Byungsik Yoon; Sookjin Lee; Sangcheol Oh; Sungchan Lee; Dongil Sung (ICTC, 2023)

Performance Evaluation of Communication Devices for Korean Train Control System Level-3. - Byungsik Yoon; Sookjin Lee; Sangcheol Oh; Sungchan Lee; Dongil Sung (ICTC, 2024)