Research

Research Area

- 5G wireless communication standards
  - MIMO-OFDM systems
  - Multiuser MIMO systems
  - Cooperative MIMO systems
  - Distributed antenna systems
  - Massive MIMO
  - mmWave communications
  - Cloud radio access network (C-RAN)
  - Femto cell, small cell, heterogeneous cellular networks (HetNet)
  - Device-to-device (D2D) communications
  - PHY/MAC designs for wireless communication standards (5G NR, LTE-A, IEEE802.11, IEEE802.15, IEEE802.16)

- 6G/B6G wireless communications and IoT networks
  - Deep learning based communication designs
  - Cell-free massive MIMO
  - V2V/V2I/V2X communications
  - UAV communications and trajectory
  - THz wireless communications
  - Physical layer security
  - Inband full duplex transceiver
  - Wireless backhaul/fronthaul links
  - Cognitive radio systems
  - Two-way relay systems
  - Analogue/physical network coding

- Wireless power transfer and communications
  - RF based wireless power transfer design
  - Simultaneous wireless information and power transfer (SWIPT)
  - Wireless powered communication network (WPCN)

- Power line communication (PLC) for smart grid
  - MIMO-OFDM PLC
  - Multiuser MIMO scheduling for PLC
  - PLC MIMO relaying
  - Cooperative wireless and power line communications
  - PHY/MAC designs for PLC standards

- Communication theory, information theory, signal processing, and deep learning
  - Deep learning
  - Channel coding theory
  - Convex optimization
  - Nonlinear programming optimization
  - Random matrix theory
  - Stochastic geometry theory
  - Channel capacity analysis
  - Error performance analysis
  - Coverage rate analysis

Research Projects

Project Sponsors

Full-duplex massive MIMO based V2X wireless communication networks for massive connected future vehicles
- Korea Research Fellowship (KRF) Grant, National Research Foundation (NRF), Ministry of Science and ICT (2020H1D3A1A04081322), Sept. 2020 - Dec. 2023 (4 years)
- Related works: [J50] [J54] ; [C44]
Analysis and research of 5G standard patents
- Institute of Information & Communications Technology Planning & Evaluation (IITP), Ministry of Science and ICT (2022-0-00194), Apr. 2022 - Dec. 2023
Study on the key technologies of 6G wireless communications and networks
- Hanbat National University, July 2022 - Feb. 2023
IoT wireless powered cognitive radio communications with user-centric distributed massive MIMO systems
- Institute of Information & Communications Technology Planning & Evaluation (IITP), Ministry of Science and ICT (2018-0-00812), July 2018 - Dec. 2022 (5 years)
- Related works: [J37] [J40] [J42] [J44] [J45] [J47] [J48] [J49] ; [C39] [C42] ; [P21] [P24] [PS24] [PS28] [PS29] [PS32] [PS33] [PS41]
Circuit and physical layer designs for body sensor networks
- Daejeon-Sejong-Chungnam Regional Innovation System (DSC-RIS) Program, National Research Foundation of Korea (NRF), Ministry of Education (2021RIS-004), Dec. 2021 - Apr. 2022 (5 months)
- Related works: [J52]
Deep learning based UAV communications, networking, and trajectory control
- Mid-Career Researcher Program Grant, National Research Foundation (NRF), Ministry of Science and ICT (2019R1A2C4070361), June 2019 - Feb. 2022 (3 years)
- Related works: [J42] [J43] [J48] [J49] [J50] [J51] ; [C39]
Study on full-duplex massive MIMO wireless backhaul for autonomous behicles by deep learning with channel measurement data
- International Joint Research Grant, National Research Foundation (NRF), Ministry of Science and ICT, Feb. 2020 - Jan. 2021
Machine learning based signal processing for the next geneartion wireless communications
- Hanbat National University, Feb. 2020 - Jan. 2021
- Related works: [D32]
Cross layer design of cryptography and physical layer security for IoT networks
- Institute of Information & Communications Technology Planning & Evaluation (IITP), Ministry of Science and ICT (2016-0-00500 (B0722-16-0006)), Jan. 2017 - Dec. 2020 (4 years)
- Related works: [J26] [J27] [J28] [J29] [J31] [J32] [J38] [J43] ; [K11] [K12] ; [C33] [C36] [C38] ; [P16] [P20] [P21] [PS16] [PS17] [PS25] [PS26]
Reliable and secure power line communications based on multi-relay multi-user MIMO for smart grid
- Korea Electric Power Research Institute (KEPRI), Korea Electric Power Corporation (KEPCO) (R17XA05-71), May 2017 - Apr. 2020 (3 years)
- Related works: [J28] [J38] ; [K7] [K8] [K11] [K12] ; [C31] [C34] [C38] ; [P15] [P25] [P26] [P27] [PS16] [PS17] [PS22] [PS25] [PS26]
Cooperative transceiver design for advanced communications
- Hanbat National University, May 2019 - Feb. 2020
- Related works: [J41]
Development of non-binding multi-modal wireless power transfer technology for wearable devices
- Korea Evaluation Institute of Industrial Technology (KEIT), Ministry of Trade, Industry and Energy (10079984), June 2017 - Dec. 2019 (3 years)
- Related works: [J29] [J30] [J33] [J37] [J39] [J42] ; [K7] ; [C34] [C35] [C36] [C37] [C39] ; [P17] [P18] [P19] [P21] [PS10]
LLS development for massive MIMO SWIPT systems
- Korea Electronics Technology Institute (KETI), Ministry of Trade, Industry and Energy, Mar. 2019 - Sept. 2019
- Related works: [J44]
Study on user centric virtual cells in cloud radio access networks with wireless fronthaul
- National Research Foundation (NRF), Ministry of Science and ICT (NRF-2016R1C1B2011921), June 2016 - May 2019 (3 years)
- Related works: [J22] [J24] [J28] [J31] [J32] [J35] ; [K5] ; [C32] [C33] [C36] [C37] ; [P12]
Study on transmission technologies for THz wireless communications
- Electronics and Telecommunications Research Institute (ETRI), Ministry of Science and ICT, Sept. 2018 - Nov. 2018
- Related works: [J35] ; [K10]
MAC algorithms for massive MISO SWIPT systems
- Korea Electronics Technology Institute (KETI), Ministry of Trade, Industry and Energy, July 2018 - Dec. 2018
- Related works: [CS2] ; [P22] [P28]
Cooperative research on appropriate technology for low-power wireless networks based on solar-energy for constructing communication infrastructures in Africa
- National Research Foundation (NRF), Ministry of Science, ICT & Future Planning (NRF-2014K1A3A1A09063284), Dec. 2014 - Dec. 2017 (3 years)
- Related works: [J18] [J25] [J26] [J28] [JS1] ; [K5] [K6] [K8] ; [C25] [C26] [C27] [C29] [C30] [C31] [C33] ; [P11] [P12] [PS3]
Study on transmission technology for next generation wireless communications
- Hanbat National University, Apr. 2016 - Feb. 2017
- Related works: [K6]
Key technology design and prototyping for physical layer wireless security
- Institute for Information & Communications Technology Promotion (IITP), Ministry of Science, ICT & Future Planning (B0722-16-0006), Sept. 2016 - Dec. 2016
- Related works: [P16]
Transmission techniques for optimizing spectral efficiency and energy efficiency in relay-based small cells
- National Research Foundation (NRF), Ministry of Science, ICT & Future Planning (NRF-2013R1A1A1060503), Nov. 2013 - Oct. 2016 (3 years)
- Related works: [J17] [J18] [J19] [J20] [J22] [J23] [J25] ; [K3] [K5] ; [C23] [C24] [C25] [C26] [C27] [C28] [C29] [C30] ; [P11] [P12] [PS2] [PS3]
Full-duplex communications based on massive MIMO for next generation wireless backhaul systems
- Institute for Information & Communications Technology Promotion (IITP), Ministry of Science, ICT & Future Planning (B0114-15-0007), Nov. 2015 - Apr. 2016
- Related works: [P12] [P13] [P14]
Study on technologies for wireless communications repeaters for supporting various services
- Institute for Information & Communications Technology Promotion (IITP), Ministry of Science, ICT & Future Planning, June 2014 - Dec. 2015 (1.5 years)
- Related works: [C23] [C24] ; [PS3]
Study on multiple-input multiple-output power line communications based on two-way relaying transmission
- Korea Electric Power Research Institute (KEPRI), Korea Electric Power Corporation (KEPCO) (R14XA02-48), Dec. 2014 - Nov. 2015
- Related works: [P15]
Energy efficiency optimization using stochastic geometry theory in distributed antenna systems
- Korea University, National Research Foundation (NRF), Ministry of Science, ICT & Future Planning (NRF-2014R1A2A1A01044715), May 2013 - Apr. 2015 (2 years)
- Related works: [J10] [J17]
Optimization of wireless communication systems based on distributed antennas with energy harvesting
- Hanbat National University, Sept. 2013 - Aug. 2014
Precoding optimization for the next generation wireless communication systems
- Hanbat National University, Sept. 2013 - Feb. 2014
Research on physical layer for the 5th generation (5G) communication standards
- Hanbat National University, Sept. 2012 - Aug. 2013
Analysis and design of MIMO heterogeneous multi-tier cellular systems using stochastic geometry theory
- National Research Foundation (NRF) (NRF-357-2011-1-D00165), Oct. 2011 - Sept. 2012
- Related works: [J11] [J13]