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연구분야 > 지능형 모빌리티 기술연구분야 > 친환경 모빌리티 기술전임교수

Office

F401

Tel

1267

E-mail

dshar@kaist.ac.kr

Site

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Summary

Research Interest

– Multimedia Communication System Design and Implementation in ITS
– Communication System/Network for Autonomous Vehicles
– Wireless Sensor Network Design and Implementation for ITS
– High-efficiency digital system design for power grid

Education

  • PhD – Electrical Engineering, Polytechnic University at Brooklyn, U.S.A.
  • MS – Electronics Engineering Seoul National University, Korea
  • BA – Electronics Engineering, Seoul National University, Korea

Biography

Dongsoo Har received the B.Sc. and M.Sc. degrees in electronics engineering from Seoul National University, respectively, and the Ph.D. degree in electrical engineering from Polytechnic University, Brooklyn, NY, USA. He is currently a faculty member of KAIST. He was a recipient of the Best Paper Award (Jack Neubauer Award) from the IEEE Transactions on Vehicular Technology in 2000. He is an associate editor of IEEE Sensors Journal. He authored and published more than 100 articles in international journals and conferences. He was the member of advisory board, program chair, vice chair, and general chair of international conferences. He also presented invited talks and keynote in international conferences. His main research interests include optimization of communication system operation and transportation system development with embedded artificial intelligence.

Publication

  • Kim, T., Kang, T., Son, S., Ko, K. W., & Har, D. (2025, February). Goal-Conditioned Reinforcement Learning Approach for Autonomous Parking in Complex Environments. In 2025 International Conference on Artificial Intelligence in Information and Communication (ICAIIC) (pp. 0465-0470). IEEE.Son, S.,
  • Saurez, A., & Har, D. (2025, February). Continuous Adversarial Text Representation Learning for Affective Recognition. In 2025 International Conference on Artificial Intelligence in Information and Communication (ICAIIC) (pp. 0433-0438). IEEE.
  • Mishra, S., Sengar, N., & Har, D. (2025). A Secure, Blockchain-Enabled Vehicular Sensor Communication Protocol With Deep Learning-Assisted Anomaly Detection. IEEE Intelligent Transportation Systems Magazine.
  • Kim, T., Kang, T., Jeong, H., & Har, D. (2024). Clustering-based Failed goal Aware Hindsight Experience Replay. PeerJ Computer Science, 10, e2588.
  • Nengroo, S. H., Lee, S., Shaaban, M. F., & Har, D. (2024). Incorporating energy storage system into grid connected photovoltaic system with the application of wireless sensor network. Journal of Energy Storage, 95, 112489.
  • Sengar, N., Kumari, I., Lee, J., & Har, D. (2024). Blockchain-Based Vision Transformer Network for Safe Driving Perception. IEEE Sensors Journal.
  • Lee, J., Lai-Dang, Q. V., Sengar, N., & Har, D. (2024). Robust Monocular Depth Estimation in Adverse Weather Conditions by Unsupervised Domain Adaptation. In ECAI 2024 (pp. 601-608). IOS Press.
  • Mishra, M., Mishra, S., & Har, D. (2024). Integrating Multisourced Sensor Data for Enhanced Traffic State Estimation. IEEE Sensors Journal, 24(12), 19614-19625.
  • Nengroo, S. H., Lee, S., Shaaban, M. F., & Har, D. (2024). Incorporating energy storage system into grid connected photovoltaic system with the application of wireless sensor network. Journal of Energy Storage, 95, 112489.
  • Kim, T., & Har, D. (2024, March). Cluster-based sampling in hindsight experience replay for robotic tasks (student abstract). In Proceedings of the AAAI Conference on Artificial Intelligence (Vol. 38, No. 21, pp. 23544-23545).
  • Moon, W., Nengroo, S., Kim, T., Lee, J., Son, S., & Har, D. (2024, March). Enhanced optical character recognition by optical sensor combined with BERT and cosine similarity scoring (student abstract). In Proceedings of the AAAI Conference on Artificial Intelligence (Vol. 38, No. 21, pp. 23585-23586).
  • Park, B., Kim, T., Lai-Dang, Q. V., & Har, D. (2024, March). Virtual action actor-critic framework for exploration (student abstract). In Proceedings of the AAAI Conference on Artificial Intelligence (Vol. 38, No. 21, pp. 23613-23614).
  • Lai-Dang, Q. V., Lee, J., Park, B., & Har, D. (2023, October). Sensor fusion by spatial encoding for autonomous driving. In 2023 IEEE SENSORS (pp. 1-4). IEEE.
  • Lee, S., Nengroo, S. H., Jin, H., Doh, Y., Lee, C., Heo, T., & Har, D. (2023). Anomaly detection of smart metering system for power management with battery storage system/electric vehicle. ETRI Journal, 45(4), 650-665.
  • Park, B., Kim, T., Moon, W., Nengroo, S. H., & Har, D. (2023, July). Off-policy reinforcement learning with loss function weighted by temporal difference error. In International Conference on Intelligent Computing (pp. 600-613). Singapore: Springer Nature Singapore.
  • Lee, S., Nengroo, S. H., Jin, H., Doh, Y., Lee, C., Heo, T., & Har, D. (2023, July). Power management in smart residential building with deep learning model for occupancy detection by usage pattern of electric appliances. In Proceedings of the 2023 5th International Electronics Communication Conference (pp. 84-92).
  • Jin, H., Lee, S., Nengroo, S. H., Ahn, G., Chang, Y. J., & Har, D. (2023). P2P power trading of nanogrids for power management in consideration of battery lifetime of ESS. Energy and Buildings, 297, 113290.
  • Lee, S., Nengroo, S. H., Jung, Y., Kim, S., Kwon, S., Shin, Y., … & Har, D. (2023, June). Factory Energy Management by Steam Energy Cluster Modeling in Paper-Making. In Proceedings of the 2023 11th International Conference on Smart Grid (icSmartGrid), Paris, France (pp. 4-7).
  • Mishra, S., Rajendran, P. K., Vecchietti, L. F., & Har, D. (2023). Sensing accident-prone features in urban scenes for proactive driving and accident prevention. IEEE Transactions on Intelligent Transportation Systems, 24(9), 9401-9414.
  • Cho, I., Rajendran, P. K., Kim, T., & Har, D. (2023, February). Reinforcement learning for predicting traffic accidents. In 2023 International Conference on Artificial Intelligence in Information and Communication (ICAIIC) (pp. 684-688). IEEE.
  • Park, B., Lee, J., Kim, T., & Har, D. (2023, February). Kick-motion training with DQN in AI soccer environment. In 2023 International Conference on Artificial Intelligence in Information and Communication (ICAIIC) (pp. 689-692). IEEE.
  • Moon, W., Park, B., Nengroo, S. H., Kim, T., & Har, D. Path Planning of Cleaning Robot with Reinforcement Learning. arXiv 2022. arXiv preprint arXiv:2208.08211.
  • Rajendran, P. K., Mishra, S., Vecchietti, L. F., & Har, D. (2022, October). RelMobNet: End-to-end relative camera pose estimation using a robust two-stage training. In European Conference on Computer Vision (pp. 238-252). Cham: Springer Nature Switzerland.
  • Jin, H., Nengroo, S. H., Kim, I., & Har, D. (2022). Special issue on advanced wireless sensor networks for emerging applications. Applied Sciences, 12(14), 7315.
  • Nengroo, S. H., Jin, H., Kim, I., & Har, D. (2022). Special Issue on Future Intelligent Transportation System (ITS) for Tomorrow and Beyond. Applied Sciences, 12(12), 5994.
  • Jin, H., Lee, S., Nengroo, S. H., & Har, D. (2022). Development of Charging/Discharging Scheduling Algorithm for Economical and Energy-Efficient Operation of Multi-EV Charging Station. Applied Sciences, 12(9), 4786.
  • Lee, S., Jin, H., Nengroo, S. H., Doh, Y., Lee, C., Heo, T., & Har, D. (2022, January). Smart Metering System Capable of Anomaly Detection by Bi-directional LSTM Autoencoder. In 2022 IEEE International Conference on Consumer Electronics (ICCE) (pp. 1-6). IEEE.
  • Kim, Inhwan, Sarvar Hussain Nengroo, and Dongsoo Har. “Reinforcement Learning for Navigation of Mobile Robot with LiDAR.” 2021 5th International Conference on Electronics, Communication and Aerospace Technology (ICECA). IEEE, 2021.
  • Mishra, Sumit, Praveen Kumar Rajendran, and Dongsoo Har. “Socially acceptable route planning and trajectory behavior analysis of personal mobility device for mobility management with improved sensing.” International Conference on Robot Intelligence Technology and Applications. Springer, Cham, 2021. 
  • Nengroo, S. H., Lee, S., Jin, H., & Har, D. (2021, December). Optimal Scheduling of Energy Storage for Power System with Capability of Sensing Short-Term Future PV Power Production. In 2021 11th International Conference on Power and Energy Systems (ICPES) (pp. 172-177). IEEE.
  • Lee, S., Jin, H., Nengroo, S. H., & Har, D. (2021, December). P2P Power Trading between Nanogrid Clusters Exploiting Electric Vehicles and Renewable Energy Sources. In 2021 International Conference on Computational Science and Computational Intelligence (CSCI) (pp. 1849-1855). IEEE.
  • Jin, H., Nengroo, S. H., Lee, S., & Har, D. (2021, September). Power Management of Microgrid Integrated with Electric Vehicles in Residential Parking Station. In 2021 10th International Conference on Renewable Energy Research and Application (ICRERA) (pp. 65-70). IEEE.
  • Lee, S., Jin, H., Vecchietti, L. F., Hong, J., Park, K. B., Son, P. N., & Har, D. (2021). Cooperative decentralized peer‐to‐peer electricity trading of nanogrid clusters based on predictions of load demand and PV power generation using a gated recurrent unit model. IET Renewable Power Generation, 15(15), 3505-3523.
  • Kim, T., Vecchietti, L. F., Choi, K., Sariel, S., & Har, D. (2021). Two-stage training algorithm for AI robot soccer. PeerJ Computer Science, 7, e718.
  • Kim, S., Kim, I., Vecchietti, L. F., & Har, D. (2020). Pose estimation utilizing a gated recurrent unit network for visual localization. Applied Sciences, 10(24), 8876.
  • Kim, T., Vecchietti, L. F., Choi, K., Lee, S., & Har, D. (2020). Machine learning for advanced wireless sensor networks: A review. IEEE Sensors Journal, 21(11), 12379-12397.
  • Lee, S., Jin, H., Vecchietti, L. F., Hong, J., & Har, D. (2020). Short-term predictive power management of PV-powered nanogrids. Ieee Access, 8, 147839-147857.
  • Vecchietti, L. F., Kim, T., Choi, K., Hong, J., & Har, D. (2020). Batch prioritization in multigoal reinforcement learning. IEEE Access, 8, 137449-137461.
  • Vecchietti, Luiz Felipe, Minah Seo, and Dongsoo Har. “Sampling rate decay in hindsight experience replay for robot control.” IEEE Transactions on Cybernetics (2020). 
  • Nam, Kyung-Jae, Joosang Joung, and Dongsoo Har. “Tri-copter UAV with individually tilted main wings for flight maneuvers.” IEEE Access 8 (2020): 46753-46772. 
  • Lee, S., Vecchietti, L. F., Jin, H., Hong, J., & Har, D. (2020). Power management by LSTM network for nanogrids. IEEE Access, 8, 24081-24097.
  • Lee, S., Har, D., Vecchietti, L. F., Hong, J., & Lim, H. J. (2020). Optimal Link Scheduling Based on Attributes of Nodes in 6TiSCH Wireless Networks. 한국정보기술학회논문지, 18(1), 77-92.
  • Kim, S., Jin, H., Seo, M., & Har, D. (2019, November). Optimal path planning of automated guided vehicle using dijkstra algorithm under dynamic conditions. In 2019 7th International Conference on Robot Intelligence Technology and Applications (RiTA) (pp. 231-236). IEEE.
  • Seo, M., Vecchietti, L. F., Lee, S., & Har, D. (2019). Rewards prediction-based credit assignment for reinforcement learning with sparse binary rewards. IEEE Access, 7, 118776-118791.
  • Lee, S., Kim, S., Seo, M., & Har, D. (2019). Synchronization of frequency hopping by LSTM network for satellite communication system. IEEE Communications Letters, 23(11), 2054-2058.
  • Lee, S., Lee, J., Jung, H., Cho, J., Hong, J., Lee, S., & Har, D. (2019). Optimal power management for nanogrids based on technical information of electric appliances. Energy and Buildings, 191, 174-186.
  • Hwang, K., Cho, J., Park, J., Har, D., & Ahn, S. (2018). Ferrite position identification system operating with wireless power transfer for intelligent train position detection. IEEE Transactions on Intelligent Transportation Systems, 20(1), 374-382.
  • Van Nguyen, B., Jung, H., Har, D., & Kim, K. (2018). Performance analysis of a cognitive radio network with an energy harvesting secondary transmitter under Nakagami-${m} $ fading. IEEE Access, 6, 4135-4144.
  • Hwang, K., Kim, D., Har, D., & Ahn, S. (2017). Pickup coil counter for detecting the presence of trains operated by wireless power transfer. IEEE Sensors Journal, 17(22), 7526-7532.
  • Har, D., Min, S., Mladenov, T., & Ngoc Son, P. (2017). Radio frequency energy harvesting for wireless sensor networks. International Journal of Distributed Sensor Networks, 13(6), 1550147717712838.
  • Lee, S., Cho, H. Y., & Har, D. (2018). Operation optimization with jointly controlled modules powered by hybrid energy source: A case study of desalination. Renewable and Sustainable Energy Reviews, 81, 3070-3080.
  • Son, P. N., Har, D., Cho, N. I., & Kong, H. Y. (2017). Optimal power allocation of relay sensor node capable of energy harvesting in cooperative cognitive radio network. Sensors, 17(3), 648.
  • Lee, Sangkeum, Junhee Hong, and Dongsoo Har. “Jointly optimized control for reverse osmosis desalination process with different types of energy resource.” Energy 117 (2016): 116-130. 
  • Lee, S., Myung, S., Hong, J., & Har, D. (2016). Reverse osmosis desalination process optimized for maximum permeate production with renewable energy. Desalination, 398, 133-143.
  • Myung, S., Lee, S., Moraes, C., & Har, D. (2016, December). Charging wireless rechargeable sensor networks deployed in a rectangular street grid. In 2016 3rd Asia-Pacific World Congress on Computer Science and Engineering (APWC on CSE) (pp. 153-156). IEEE.
  • Moraes, C., Myung, S., Lee, S., & Har, D. (2017). Distributed sensor nodes charged by mobile charger with directional antenna and by energy trading for balancing. Sensors, 17(1), 122.
  • Moraes, Celso, and Dongsoo Har. “Charging distributed sensor nodes exploiting clustering and energy trading.” IEEE Sensors Journal 17.2 (2016): 546-555.
  • Usman, Muhammad, Dongsoo Har, and Insoo Koo. “Energy-efficient infrastructure sensor network for ad hoc cognitive radio network.” IEEE Sensors Journal 16.8 (2016): 2775-2787. 
  • Bae, Y. S., Song, J. I., Har, D., & Kim, D. Y. (2015). Beam propagation analysis on thickness measurements in quantitative phase microscopy. Optical Review, 22(4), 532-538.
  • Tayebi, B., Jafarfard, M. R., Sharif, F., Song, Y. S., Har, D., & Kim, D. Y. (2015). Large step-phase measurement by a reduced-phase triple-illumination interferometer. Optics Express, 23(9), 11264-11271.
  • Park, Ieryung, Dohyun Kim, and Dongsoo Har. “MAC achieving low latency and energy efficiency in hierarchical M2M networks with clustered nodes.” IEEE Sensors Journal 15.3 (2014): 1657-1661. 
  • Shin, K., Park, I., Hong, J., Har, D., & Cho, D. H. (2015). Per-node throughput enhancement in Wi-Fi densenets. IEEE Communications Magazine, 53(1), 118-125.
  • Ryu, Hyun-Gyu, and Dongsoo Har. “Wireless power transfer for high-precision position detection of railroad vehicles.” 2015 IEEE Power, Communication and Information Technology Conference (PCITC). IEEE, 2015. 
  • Ryu, Hyun-Gyu, and Dongsoo Har. “Improved efficiency of wireless power transfer by tilting coils for wireless data communication.” 2015 International EURASIP Workshop on RFID Technology (EURFID). IEEE, 2015. 
  • Ryu, Hyun-Gyu, Sang-Keum Lee, and Dongsoo Har. “Data transmission with reduced delay for distributed acoustic sensors.” International Journal of Distributed Sensor Networks 11.11 (2015): 247612. 
  • Hong, J., Lee, W., Ha Kim, J., Kim, J., Park, I., & Har, D. (2016). Smart water grid: desalination water management platform. Desalination and Water Treatment, 57(7), 2845-2854.
  • Son, Pham Ngoc, Dongsoo Har, and Hyung Yun Kong. “Smart power allocation for secrecy transmission in reciprocally cooperative spectrum sharing.” IEEE Transactions on Vehicular Technology 64.11 (2015): 5395-5400. 
  • Ahn, Seok-Ki, Kyeongcheol Yang, and Dongsoo Har. “Evaluation of the low error-rate performance of LDPC codes over Rayleigh fading channels using importance sampling.” IEEE transactions on communications 61.6 (2013): 2166-2177. 
  • Hong, E., Kim, H., Yang, K., & Har, D. (2013). Pilot-aided side information detection in SLM-based OFDM systems. IEEE Transactions on Wireless Communications, 12(7), 3140-3147.
  • Park, J., Hong, E., Kim, H., Kim, K., & Har, D. (2013). Pilot-assisted data recovery for OFDM systems with blind selected mapping scheme and space-frequency block coding. Digital Signal Processing, 23(5), 1704-1711.
  • Hong, Eonpyo, Kiseon Kim, and Dongsoo Har. “Spectrum sensing by parallel pairs of cross-correlators and comb filters for OFDM systems with pilot tones.” IEEE Sensors Journal 12.7 (2012): 2380-2383. 
  • Ahn, C. J., Har, D., Omori, T., & Hashimoto, K. Y. (2012). Frequency symbol spreading based adaptive subcarrier block selection for OFDMA system. Digital Signal Processing, 22(3), 518-525.
  • Shah, Syed Abdul Baqi, Saeid Nooshabadi, and Dong Soo Har. “Efficient implementation of channel coding and interleaver for Digital Video Broadcasting (DVB-T2) on FPGA.” 2012 IEEE 16th International Symposium on Consumer Electronics. IEEE, 2012. 
  • Kim, H., Har, D., Mao, Z. H., Sun, M., & Lee, H. N. (2012). Efficient joint source–channel decoding of multi-state Markov sequences. IET communications, 6(9), 1038-1044.
  • Hong, Eonpyo, and Dongsoo Har. “Adaptive All-Pass Filter Achieving Low Peak-to-Average Power Ratio for OFDM Systems.” IEEE transactions on vehicular technology 60.8 (2011): 4029-4034. 
  • Tariquzzaman, M., Kim, J. Y., Na, S. Y., Kim, H. G., & Har, D. (2011). A Visual Signal Reliability for Robust Audio-Visual Speaker Identification. IEICE TRANSACTIONS on Information and Systems, 94(10), 2052-2055.
  • Hong, Eonpyo, Hyunju Kim, and Dongsoo Har. “PAPR reduction by a single adaptive all-pass filter for OFDM systems.” IEICE Electronics Express 8.19 (2011): 1633-1639.
  • Kim, H., Hong, E., Ahn, C., & Har, D. (2011). Efficient phase sequence generation for SLM scheme without side information. IEICE Electronics Express, 8(17), 1393-1398.
  • Hong, Eonpyo, and Dongsoo Har. “Peak-to-average power ratio reduction for MISO OFDM systems with adaptive all-pass filters.” IEEE transactions on wireless communications 10.10 (2011): 3163-3167.
  • Kim, H., Hong, E., Ahn, C., & Har, D. (2011). A pilot symbol pattern enabling data recovery without side information in PTS-based OFDM systems. IEEE Transactions on Broadcasting, 57(2), 307-312.
  • Park, Jihan, Eonpyo Hong, and DongSoo Har. “Low complexity data decoding for SLM-based OFDM systems without side information.” IEEE Communications Letters 15.6 (2011): 611-613.
  • Lim, S., Park, Y., Hong, E., & Har, D. (2011, October). Implementation of FPGA-based DVB-T2 modulator with multiple PLPs. In 2011 11th International Symposium on Communications & Information Technologies (ISCIT) (pp. 78-83). IEEE.
  • Hong, Eonpyo, and Dongsoo Har. “Peak-to-average power ratio reduction in OFDM systems using all-pass filters.” IEEE transactions on Broadcasting 56.1 (2009): 114-119. 
  • Hong, E., S. Min, and Dongsoo Har. “SLM-based OFDM system without side information for data recovery.” Electronics letters 46.3 (2010): 1.
  • Har, Dong-Soo, and Yousaf Zafar. “Power-on reset circuit.” U.S. Patent No. 7,816,956. 19 Oct. 2010.
  • Park, Jihan, Yongwook Jeon, and Dongsoo Har. “A fast intra prediction mode decision method based on high correlation of video sequences.” 2010 IEEE International Conference on Industrial Technology. IEEE, 2010.
  • Zafar, Yousaf, Jihan Park, and Dongsoo Har. “Random clocking induced DPA attack immunity in FPGAs.” 2010 IEEE International Conference on Industrial Technology. IEEE, 2010.
  • Hong, E., Jung, E., Hong, J., Yim, J., & Har, D. (2009). Parallel Parity Checksum and Syndrome Generation for Digital Video and Audio Transmission over Cable Channel. IEICE transactions on information and systems, 92(7), 1435-1441.
  • Kwak, S., Lee, J. G., Jung, E. G., Har, D., Ercegovac, M. D., & Lee, J. A. (2009). Exploration of Power-Delay Trade-Offs with Heterogeneous Adders by Integer Linear Programming. Journal of Circuits, Systems, and Computers, 18(04), 787-800.
  • Har, Dong-Soo, and Sun-Hee Hwang. “Space-time block coding system combined with local polynomial approximation based beamformer.” U.S. Patent No. 7,555,050. 30 Jun. 2009.
  • Har, Dong-Soo, and Dong-Wook Lee. “Montgomery multiplier for RSA security module.” U.S. Patent No. 7,519,643. 14 Apr. 2009.
  • Choi, Byung-Soo, and Dong-Soo Har. “Data transmission apparatus using asynchronous dual-rail bus and method therefor.” U.S. Patent No. 7,512,190. 31 Mar. 2009.
  • Kwak, S., Lee, H. W., Zafar, Y., Oh, M. H., & Har, D. (2009, April). Design of asynchronous msp430 microprocessor using balsa back-end retargeting. In 2009 5th Southern Conference on Programmable Logic (SPL) (pp. 223-228). IEEE.
  • Park, S. H., Lee, J. Y., Hong, E. P., Min, S. W., & Har, D. S. (2009, March). Merged SLM scheme for PAPR reduction of OFDM system with low complexity. In 2009 IEEE Sarnoff Symposium (pp. 1-5). IEEE.
  • Kim, H., Hong, E., Min, S., & Har, D. (2009, March). Carrier frequency synchronization based on pulse-pair method for 8-VSB DTV systems. In 2009 IEEE Sarnoff Symposium (pp. 1-5). IEEE.
  • Zafar, Y., and D. Har. “A novel countermeasure enhancing side channel immunity in FPGAs.” 2008 International Conference on Advances in Electronics and Micro-electronics. IEEE, 2008.
  • Kwak, Sanghoon, Jinwook Kim, and Dongsoo Har. “A novel hardware architecture of intra-predictor generator for H. 264/AVC Codec.” IEICE transactions on information and systems 91.7 (2008): 2083-2086.
  • Kwak, S., Har, D., Lee, J. G., & Lee, J. A. (2008, October). Design of Heterogeneous Adders Based on Power-Delay Tradeoffs. In 2008 Fifth IEEE International Symposium on Embedded Computing (pp. 223-226). IEEE.
  • Jung, E. G., Lee, J. G., Jhang, K. S., Lee, J. A., & Har, D. (2007). Asynchronous layered interface of multimedia socs for multiple outstanding transactions. The Journal of VLSI Signal Processing Systems for Signal, Image, and Video Technology, 46(2), 133-151.
  • Mujahid, Fahad Ali, and Dong-Soo Har. “Intellectual property module for system-on-chip.” U.S. Patent No. 7,313,672. 25 Dec. 2007.
  • Har, Dong-Soo, and Myeong-Hoon Oh. “Delay-insensitive data transfer circuit using current-mode multiple-valued logic.” U.S. Patent No. 7,282,946. 16 Oct. 2007.
  • Kang, Min-Chang, Eun-Gu Jung, and Dong-Soo Har. “Asynchronous switch based on butterfly fat-tree for network on chip application.” U.S. Patent No. 7,467,358. 16 Dec. 2008.
  • Jung, Eun-Gu, Jeong-Gun Lee, and Dong-Soo Har. “Data transmitting circuit and method based on differential value data encoding.” U.S. Patent No. 7,170,431. 30 Jan. 2007.
  • Kwak, Sanghoon, Hyunsup Shin, and Dongsoo Har. “Fast Quater-Pel Motion Estimation by Adaptive Searching Point Selection.” ITC-CSCC: International Technical Conference on Circuits Systems, Computers and Communications. 2007.
  • Hong, Eonpyo, Hyunsoo Yoon, and Dongsoo Har. “Optimum Reference Power in Automatic Gain Control Circuitry for OFDM Receivers.” ITC-CSCC: International Technical Conference on Circuits Systems, Computers and Communications. 2007.
  • Hong, E., Jung, E., Har, D., & Yim, J. (2007, July). A novel parallel parity checksum generator complying with ITU-T J. 83 annex B. In Proceedings of the Fifth IASTED International Conference on Circuits, Signals, and Systems.
  • Kim, J., Jung, E., Hong, E., Kwak, S., & Har, D. (2007, March). Implementation of High Performance Intra Predictor in H. 264. In XIII Workshop IBERCHIP (pp. 343-344).
  • Shin, H., Park, I., Park, J., Jung, E., & Har, D. LOW-POWER CONTROLLER FOR SENSOR NETWORKS.
  • Park, I., Shin, H., Park, J., Jung, E., & Har, D. (2007). Improvement of TINYOS implementation for small memory FPGA system. In XIII-IBERCHIP Workshop, IWS.
  • Kim, D., Jung, E., Park, H., Shin, H., & Har, D. (2006, December). Implementation of high performance CAVLC for H. 264/AVC video codec. In 2006 6th International Workshop on System on Chip for Real Time Applications (pp. 20-23). IEEE.
  • Mladenov, T., Mujahid, F., Jung, E., & Har, D. (2006). Bandwidth, Area Efficient and Target Device Independent DDR SDRAM Controller. In Proceedings of World Academy of Science, Engineering and Technology (Vol. 18, pp. 102-106).
  • Mladenov, T. M., Mujahid, F. A., Jung, E., & Har, D. (2006, August). Implementation of High Data Rate Stream Parsing with Data Aligning Mechanism. In 2006 IEEE International Symposium on Signal Processing and Information Technology (pp. 697-701). IEEE.
  • Park, J. H., Kwak, S. H., Mujahid, F. A., Lee, J. A., & Har, D. S. AN EFFECTIVE SCHEDULING ALGORITHM TARGETING HIGH UTILIZATION OF RECONFIGURABLE DEVICES IN RECONFIGURABLE CO-SYNTHESIS SYSTEM ARCHITECTURE.
  • Hong, E., Jung, E., Har, D., & Yim, J. (2007, July). A novel parallel parity checksum generator complying with ITU-T J. 83 annex B. In Proceedings of the Fifth IASTED International Conference on Circuits, Signals, and Systems.
  • Jung, Eun-Gu, and Dong-Soo Har. “Asynchronous reorder buffer for asynchronous on-chip bus.” IEICE transactions on electronics 88.12 (2005): 2391-2394.
  • Jung, E. G., Lee, J. G., Kwak, S. H., Jhang, K. S., Lee, J. A., & Har, D. S. (2005). Asynchronous multiple-issue on-chip bus with in-order/out-of-order completion. IEICE transactions on electronics, 88(12), 2395-2399.
  • Jung, E. G., Lee, J. G., Jhang, K. S., & Har, D. S. (2005). Differential value encoding for delay insensitive handshake protocol. IEICE transactions on information and systems, 88(7), 1437-1444.
  • Oh, Myeong-Hoon, and Dong-Soo Har. “Low delay-power product current-mode multiple valued logic for delay-insensitive data transfer mechanism.” IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 88.5 (2005): 1379-1383.
  • Lee, Dong-Wook, and Dong-Soo Har. “An area efficient approach to design self-timed cryptosystems combatting DPA attack.” IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 88.1 (2005): 331-333.
  • Hong, E. P., Jung, E. G., Fraz, H., & Har, D. S. (2005, July). Parallel 4/spl times/4 transform architecture based on bit extended arithmetic for H. 264/AVC. In International Symposium on Signals, Circuits and Systems, 2005. ISSCS 2005. (Vol. 1, pp. 95-98). IEEE.
  • Jung, E. G., Lee, J. G., Fraz, H., Jhang, K. S., Lee, J. A., & Har, D. S. (2005, July). Implementation of asynchronous reorder buffer for asynchronous on-chip bus. In International Symposium on Signals, Circuits and Systems, 2005. ISSCS 2005. (Vol. 2, pp. 773-776). IEEE.
  • Park, J. H., Kwak, S. H., Mujahid, F. A., Lee, J. A., & Har, D. S. AN EFFECTIVE SCHEDULING ALGORITHM TARGETING HIGH UTILIZATION OF RECONFIGURABLE DEVICES IN RECONFIGURABLE CO-SYNTHESIS SYSTEM ARCHITECTURE.
  • Jung, E. G., Lee, J. G., Kwak, S. H., Jhang, K. S., Lee, J. A., & Har, D. S. (2005, April). High performance asynchronous on-chip bus with multiple issue and out-of-order/in-order completion. In Proceedings of the 15th ACM Great Lakes symposium on VLSI (pp. 152-155).
  • Mujahid, F. A., Jung, E. G., Har, D. S., Hong, J. H., & Lim, H. J. (2005, November). High speed JPEG coder based on modularized and pipelined architecture with distributed control. In Pacific-Rim Conference on Multimedia (pp. 466-476). Springer, Berlin, Heidelberg.
  • Kang, Min-Chang, Eun-Gu Jung, and Dong-Soo Har. “Design of an asynchronous switch based on butterfly fat-tree for network-on-chip applications.” Pacific-Rim Conference on Multimedia. Springer, Berlin, Heidelberg, 2005.
  • Jung, E. G., Hong, E. P., Jhang, K. S., Lee, J. A., & Har, D. S. (2005, November). Self-timed interconnect with layered interface based on distributed and modularized control for multimedia SoCs. In Pacific-Rim Conference on Multimedia (pp. 500-511). Springer, Berlin, Heidelberg.
  • Mujahid, F. A., Jung, E. G., Har, D. S., Hong, J. H., & Lim, H. J. (2005, November). High speed JPEG coder based on modularized and pipelined architecture with distributed control. In Pacific-Rim Conference on Multimedia (pp. 466-476). Springer, Berlin, Heidelberg.
  • Baek, S. J., Kim, J., Kim, D. J., Har, D. S., & Kim, K. (2004). A robust recursive least square algorithm against impulsive noise. IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences, 87(9), 2463-2465.
  • Shevlyakov, Georgy, Kiseon Kim, and Dong Soo Har. “A Robust Maximin Low-Complexity Detector in Noise Models with a Bounded Variance.”
  • Jung, E. G., Lee, J. G., Har, D. S., & Jhang, K. S. (2004, July). Differential value encoding for two-phase 1-of-N delay insensitive handshake protocol in GALS systems. In The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS’04. (Vol. 2, pp. II-II). IEEE.
  • Oh, Myeong-Hoon, and Dong-Soo Har. “A novel mechanism for delay-insensitive data transfer based on current-mode multiple valued logic.” International Workshop on Power and Timing Modeling, Optimization and Simulation. Springer, Berlin, Heidelberg, 2004.
  • Choi, Byung-Soo, Jeong-A. Lee, and Dong-Soo Har. “High performance microprocessor design methods exploiting information locality and data redundancy for lower area cost and power consumption.” Asia-Pacific Conference on Advances in Computer Systems Architecture. Springer, Berlin, Heidelberg, 2004.
  • Har, Dong-Soo. “Radio Propagation Measurementsand Path Loss Formulas for Microcellular Systems.” The Journal of Korean Institute of Communications and Information Sciences 28.4A (2003): 238-246.
  • Har, Dongsoo, and Henry L. Bertoni. “Effect of anisotropic propagation modeling on microcellular system design.” IEEE transactions on vehicular technology 49.4 (2000): 1303-1313.
  • Har, Dongsoo, Ce Xu, and Howard H. Xia. “Propagation modelling for wireless local loop channel.” International Journal of Communication Systems 13.3 (2000): 231-241.
  • Har, Dongsoo, Howard H. Xia, and Henry L. Bertoni. “Path-loss prediction model for microcells.” IEEE Transactions on Vehicular Technology 48.5 (1999): 1453-1462.
  • Har, Dongsoo, Alix M. Watson, and Anthony G. Chadney. “Comment on diffraction loss of rooftop-to-street in COST 231-Walfisch-Ikegami model.” IEEE Transactions on Vehicular Technology 48.5 (1999): 1451-1452.
  • Har, Dongsoo. Effect of propagation modeling on microcellular system design. Diss. Polytechnic University, 1997.

Awards

– Best paper awards: 

IEEE Transactions on Vehicular Technology (2000),

ENICS (2008) International Conference.

IEEE APWCE (2016) International Conference.

 

– Honors: 

Minister Commendation (2016), Ministry of Land, Infrastructure, and Transport.

Research

Prof. Dongsoo Har’s research focuses on optimization of communication system operation and transportation system development with embedded artificial intelligence. In detail, his current research areas contain multimedia communication system design and implementation in ITS, communication system/network for autonomous vehicles, wireless sensor network design and implementation for ITS, high-efficiency digital system design for power grid, self-improving artificial intelligence technology, and development of deep neural networks.

 

Ongoing Research:

Artificial intelligence and its application 

AI is the intelligence exhibited by machines or software, which is the subfield of computer science. Also, AI is becoming a popular field in computer science as it has improved the human life in many areas. Application areas of AI have a huge impact on different fields of human life as expert system is widely used these days to solve the complex problems in many areas as science, engineering, business, medicine, weather forecasting. The objective of this research is to increase the quality and efficiency of applications by using AI technology. In our laboratory, AI soccer system using reinforcement learning is being studied. In the ITS, the research about accident area prediction system and feature learning employing deep learning is also being performed, and the architecture of deep neural network is being studied. Finally, the weather forecasting method is also being studied for the prediction of renewable power production.

 

Energy cloud 

The energy cloud represents a digital transformation that reconstructs power grid as a network connecting homes and businesses with a clean energy sources and services, utilizing data to help customers to customize their energy use in whatever manner suits their needs. Emerging technologies, such as cloud computing, Internet of Things, and big data, is highly utilized to achieve the energy cloud assisting the management of data and information related to energy system flow. This leads to the improvement of flexibility, solution scalability, optimization of energy use, and electric device management. The objective of this study is to present the system of power grid and develop various optimization methods considering the basic elements and requirements of the energy cloud. In our laboratory, communication network/system, optimal scheduling and management methods, distribution system design for smart grid, and weather forecasting methods are being studied for the energy cloud. 

Teaching

Prof. Dongsoo Har teaches graduate courses in Cho Chun Shik Graduate School of Mobility: Transportation Infrastructure Systems (GT507) and Special Topics on Green Railway Vehicle Technology <Wireless Link Analysis> (GT843). 

Students

Woohyeon Moon

M.S. candidate

moonstar@kaist.ac.kr

Bumgeun Park

M.S. candidate

j4t123@kaist.ac.kr

Mishra Sumit

M.S. candidate

sumitmiishra209@kaist.ac.kr

Lai Dang Quoc Vinh

M.S. candidate

ldqvinh@kaist.ac.kr

Praveen Kumar Rajendran

M.S. candidate

praveenkumar@kaist.ac.kr

Injoon Cho

M.S. candidate

oprij12@kaist.ac.kr

Inhwan Kim

M.S. candidate

inhwan_kim@kaist.ac.kr

Sarvar Hussain Nengroo

Ph.D. candidate

sarvar@kaist.ac.kr

Taeyoung Kim

Ph.D. candidate

ngng9957@kaist.ac.kr

Hojun Jin

Ph.D. candidate

hjjin1995@kaist.ac.kr

Summary

Research Interest

- Multimedia Communication System Design and Implementation in ITS
- Communication System/Network for Autonomous Vehicles
- Wireless Sensor Network Design and Implementation for ITS
- High-efficiency digital system design for power grid

Education

  • PhD – Electrical Engineering, Polytechnic University at Brooklyn, U.S.A.
  • MS – Electronics Engineering Seoul National University, Korea
  • BA – Electronics Engineering, Seoul National University, Korea

Biography

Dongsoo Har received the B.Sc. and M.Sc. degrees in electronics engineering from Seoul National University, respectively, and the Ph.D. degree in electrical engineering from Polytechnic University, Brooklyn, NY, USA. He is currently a faculty member of KAIST. He was a recipient of the Best Paper Award (Jack Neubauer Award) from the IEEE Transactions on Vehicular Technology in 2000. He is an associate editor of IEEE Sensors Journal. He authored and published more than 100 articles in international journals and conferences. He was the member of advisory board, program chair, vice chair, and general chair of international conferences. He also presented invited talks and keynote in international conferences. His main research interests include optimization of communication system operation and transportation system development with embedded artificial intelligence.

Publication

  • Kim, T., Kang, T., Son, S., Ko, K. W., & Har, D. (2025, February). Goal-Conditioned Reinforcement Learning Approach for Autonomous Parking in Complex Environments. In 2025 International Conference on Artificial Intelligence in Information and Communication (ICAIIC) (pp. 0465-0470). IEEE.Son, S.,
  • Saurez, A., & Har, D. (2025, February). Continuous Adversarial Text Representation Learning for Affective Recognition. In 2025 International Conference on Artificial Intelligence in Information and Communication (ICAIIC) (pp. 0433-0438). IEEE.
  • Mishra, S., Sengar, N., & Har, D. (2025). A Secure, Blockchain-Enabled Vehicular Sensor Communication Protocol With Deep Learning-Assisted Anomaly Detection. IEEE Intelligent Transportation Systems Magazine.
  • Kim, T., Kang, T., Jeong, H., & Har, D. (2024). Clustering-based Failed goal Aware Hindsight Experience Replay. PeerJ Computer Science, 10, e2588.
  • Nengroo, S. H., Lee, S., Shaaban, M. F., & Har, D. (2024). Incorporating energy storage system into grid connected photovoltaic system with the application of wireless sensor network. Journal of Energy Storage, 95, 112489.
  • Sengar, N., Kumari, I., Lee, J., & Har, D. (2024). Blockchain-Based Vision Transformer Network for Safe Driving Perception. IEEE Sensors Journal.
  • Lee, J., Lai-Dang, Q. V., Sengar, N., & Har, D. (2024). Robust Monocular Depth Estimation in Adverse Weather Conditions by Unsupervised Domain Adaptation. In ECAI 2024 (pp. 601-608). IOS Press.
  • Mishra, M., Mishra, S., & Har, D. (2024). Integrating Multisourced Sensor Data for Enhanced Traffic State Estimation. IEEE Sensors Journal, 24(12), 19614-19625.
  • Nengroo, S. H., Lee, S., Shaaban, M. F., & Har, D. (2024). Incorporating energy storage system into grid connected photovoltaic system with the application of wireless sensor network. Journal of Energy Storage, 95, 112489.
  • Kim, T., & Har, D. (2024, March). Cluster-based sampling in hindsight experience replay for robotic tasks (student abstract). In Proceedings of the AAAI Conference on Artificial Intelligence (Vol. 38, No. 21, pp. 23544-23545).
  • Moon, W., Nengroo, S., Kim, T., Lee, J., Son, S., & Har, D. (2024, March). Enhanced optical character recognition by optical sensor combined with BERT and cosine similarity scoring (student abstract). In Proceedings of the AAAI Conference on Artificial Intelligence (Vol. 38, No. 21, pp. 23585-23586).
  • Park, B., Kim, T., Lai-Dang, Q. V., & Har, D. (2024, March). Virtual action actor-critic framework for exploration (student abstract). In Proceedings of the AAAI Conference on Artificial Intelligence (Vol. 38, No. 21, pp. 23613-23614).
  • Lai-Dang, Q. V., Lee, J., Park, B., & Har, D. (2023, October). Sensor fusion by spatial encoding for autonomous driving. In 2023 IEEE SENSORS (pp. 1-4). IEEE.
  • Lee, S., Nengroo, S. H., Jin, H., Doh, Y., Lee, C., Heo, T., & Har, D. (2023). Anomaly detection of smart metering system for power management with battery storage system/electric vehicle. ETRI Journal, 45(4), 650-665.
  • Park, B., Kim, T., Moon, W., Nengroo, S. H., & Har, D. (2023, July). Off-policy reinforcement learning with loss function weighted by temporal difference error. In International Conference on Intelligent Computing (pp. 600-613). Singapore: Springer Nature Singapore.
  • Lee, S., Nengroo, S. H., Jin, H., Doh, Y., Lee, C., Heo, T., & Har, D. (2023, July). Power management in smart residential building with deep learning model for occupancy detection by usage pattern of electric appliances. In Proceedings of the 2023 5th International Electronics Communication Conference (pp. 84-92).
  • Jin, H., Lee, S., Nengroo, S. H., Ahn, G., Chang, Y. J., & Har, D. (2023). P2P power trading of nanogrids for power management in consideration of battery lifetime of ESS. Energy and Buildings, 297, 113290.
  • Lee, S., Nengroo, S. H., Jung, Y., Kim, S., Kwon, S., Shin, Y., … & Har, D. (2023, June). Factory Energy Management by Steam Energy Cluster Modeling in Paper-Making. In Proceedings of the 2023 11th International Conference on Smart Grid (icSmartGrid), Paris, France (pp. 4-7).
  • Mishra, S., Rajendran, P. K., Vecchietti, L. F., & Har, D. (2023). Sensing accident-prone features in urban scenes for proactive driving and accident prevention. IEEE Transactions on Intelligent Transportation Systems, 24(9), 9401-9414.
  • Cho, I., Rajendran, P. K., Kim, T., & Har, D. (2023, February). Reinforcement learning for predicting traffic accidents. In 2023 International Conference on Artificial Intelligence in Information and Communication (ICAIIC) (pp. 684-688). IEEE.
  • Park, B., Lee, J., Kim, T., & Har, D. (2023, February). Kick-motion training with DQN in AI soccer environment. In 2023 International Conference on Artificial Intelligence in Information and Communication (ICAIIC) (pp. 689-692). IEEE.
  • Moon, W., Park, B., Nengroo, S. H., Kim, T., & Har, D. Path Planning of Cleaning Robot with Reinforcement Learning. arXiv 2022. arXiv preprint arXiv:2208.08211.
  • Rajendran, P. K., Mishra, S., Vecchietti, L. F., & Har, D. (2022, October). RelMobNet: End-to-end relative camera pose estimation using a robust two-stage training. In European Conference on Computer Vision (pp. 238-252). Cham: Springer Nature Switzerland.
  • Jin, H., Nengroo, S. H., Kim, I., & Har, D. (2022). Special issue on advanced wireless sensor networks for emerging applications. Applied Sciences, 12(14), 7315.
  • Nengroo, S. H., Jin, H., Kim, I., & Har, D. (2022). Special Issue on Future Intelligent Transportation System (ITS) for Tomorrow and Beyond. Applied Sciences, 12(12), 5994.
  • Jin, H., Lee, S., Nengroo, S. H., & Har, D. (2022). Development of Charging/Discharging Scheduling Algorithm for Economical and Energy-Efficient Operation of Multi-EV Charging Station. Applied Sciences, 12(9), 4786.
  • Lee, S., Jin, H., Nengroo, S. H., Doh, Y., Lee, C., Heo, T., & Har, D. (2022, January). Smart Metering System Capable of Anomaly Detection by Bi-directional LSTM Autoencoder. In 2022 IEEE International Conference on Consumer Electronics (ICCE) (pp. 1-6). IEEE.
  • Kim, Inhwan, Sarvar Hussain Nengroo, and Dongsoo Har. “Reinforcement Learning for Navigation of Mobile Robot with LiDAR.” 2021 5th International Conference on Electronics, Communication and Aerospace Technology (ICECA). IEEE, 2021.
  • Mishra, Sumit, Praveen Kumar Rajendran, and Dongsoo Har. “Socially acceptable route planning and trajectory behavior analysis of personal mobility device for mobility management with improved sensing.” International Conference on Robot Intelligence Technology and Applications. Springer, Cham, 2021. 
  • Nengroo, S. H., Lee, S., Jin, H., & Har, D. (2021, December). Optimal Scheduling of Energy Storage for Power System with Capability of Sensing Short-Term Future PV Power Production. In 2021 11th International Conference on Power and Energy Systems (ICPES) (pp. 172-177). IEEE.
  • Lee, S., Jin, H., Nengroo, S. H., & Har, D. (2021, December). P2P Power Trading between Nanogrid Clusters Exploiting Electric Vehicles and Renewable Energy Sources. In 2021 International Conference on Computational Science and Computational Intelligence (CSCI) (pp. 1849-1855). IEEE.
  • Jin, H., Nengroo, S. H., Lee, S., & Har, D. (2021, September). Power Management of Microgrid Integrated with Electric Vehicles in Residential Parking Station. In 2021 10th International Conference on Renewable Energy Research and Application (ICRERA) (pp. 65-70). IEEE.
  • Lee, S., Jin, H., Vecchietti, L. F., Hong, J., Park, K. B., Son, P. N., & Har, D. (2021). Cooperative decentralized peer‐to‐peer electricity trading of nanogrid clusters based on predictions of load demand and PV power generation using a gated recurrent unit model. IET Renewable Power Generation, 15(15), 3505-3523.
  • Kim, T., Vecchietti, L. F., Choi, K., Sariel, S., & Har, D. (2021). Two-stage training algorithm for AI robot soccer. PeerJ Computer Science, 7, e718.
  • Kim, S., Kim, I., Vecchietti, L. F., & Har, D. (2020). Pose estimation utilizing a gated recurrent unit network for visual localization. Applied Sciences, 10(24), 8876.
  • Kim, T., Vecchietti, L. F., Choi, K., Lee, S., & Har, D. (2020). Machine learning for advanced wireless sensor networks: A review. IEEE Sensors Journal, 21(11), 12379-12397.
  • Lee, S., Jin, H., Vecchietti, L. F., Hong, J., & Har, D. (2020). Short-term predictive power management of PV-powered nanogrids. Ieee Access, 8, 147839-147857.
  • Vecchietti, L. F., Kim, T., Choi, K., Hong, J., & Har, D. (2020). Batch prioritization in multigoal reinforcement learning. IEEE Access, 8, 137449-137461.
  • Vecchietti, Luiz Felipe, Minah Seo, and Dongsoo Har. “Sampling rate decay in hindsight experience replay for robot control.” IEEE Transactions on Cybernetics (2020). 
  • Nam, Kyung-Jae, Joosang Joung, and Dongsoo Har. “Tri-copter UAV with individually tilted main wings for flight maneuvers.” IEEE Access 8 (2020): 46753-46772. 
  • Lee, S., Vecchietti, L. F., Jin, H., Hong, J., & Har, D. (2020). Power management by LSTM network for nanogrids. IEEE Access, 8, 24081-24097.
  • Lee, S., Har, D., Vecchietti, L. F., Hong, J., & Lim, H. J. (2020). Optimal Link Scheduling Based on Attributes of Nodes in 6TiSCH Wireless Networks. 한국정보기술학회논문지, 18(1), 77-92.
  • Kim, S., Jin, H., Seo, M., & Har, D. (2019, November). Optimal path planning of automated guided vehicle using dijkstra algorithm under dynamic conditions. In 2019 7th International Conference on Robot Intelligence Technology and Applications (RiTA) (pp. 231-236). IEEE.
  • Seo, M., Vecchietti, L. F., Lee, S., & Har, D. (2019). Rewards prediction-based credit assignment for reinforcement learning with sparse binary rewards. IEEE Access, 7, 118776-118791.
  • Lee, S., Kim, S., Seo, M., & Har, D. (2019). Synchronization of frequency hopping by LSTM network for satellite communication system. IEEE Communications Letters, 23(11), 2054-2058.
  • Lee, S., Lee, J., Jung, H., Cho, J., Hong, J., Lee, S., & Har, D. (2019). Optimal power management for nanogrids based on technical information of electric appliances. Energy and Buildings, 191, 174-186.
  • Hwang, K., Cho, J., Park, J., Har, D., & Ahn, S. (2018). Ferrite position identification system operating with wireless power transfer for intelligent train position detection. IEEE Transactions on Intelligent Transportation Systems, 20(1), 374-382.
  • Van Nguyen, B., Jung, H., Har, D., & Kim, K. (2018). Performance analysis of a cognitive radio network with an energy harvesting secondary transmitter under Nakagami-${m} $ fading. IEEE Access, 6, 4135-4144.
  • Hwang, K., Kim, D., Har, D., & Ahn, S. (2017). Pickup coil counter for detecting the presence of trains operated by wireless power transfer. IEEE Sensors Journal, 17(22), 7526-7532.
  • Har, D., Min, S., Mladenov, T., & Ngoc Son, P. (2017). Radio frequency energy harvesting for wireless sensor networks. International Journal of Distributed Sensor Networks, 13(6), 1550147717712838.
  • Lee, S., Cho, H. Y., & Har, D. (2018). Operation optimization with jointly controlled modules powered by hybrid energy source: A case study of desalination. Renewable and Sustainable Energy Reviews, 81, 3070-3080.
  • Son, P. N., Har, D., Cho, N. I., & Kong, H. Y. (2017). Optimal power allocation of relay sensor node capable of energy harvesting in cooperative cognitive radio network. Sensors, 17(3), 648.
  • Lee, Sangkeum, Junhee Hong, and Dongsoo Har. “Jointly optimized control for reverse osmosis desalination process with different types of energy resource.” Energy 117 (2016): 116-130. 
  • Lee, S., Myung, S., Hong, J., & Har, D. (2016). Reverse osmosis desalination process optimized for maximum permeate production with renewable energy. Desalination, 398, 133-143.
  • Myung, S., Lee, S., Moraes, C., & Har, D. (2016, December). Charging wireless rechargeable sensor networks deployed in a rectangular street grid. In 2016 3rd Asia-Pacific World Congress on Computer Science and Engineering (APWC on CSE) (pp. 153-156). IEEE.
  • Moraes, C., Myung, S., Lee, S., & Har, D. (2017). Distributed sensor nodes charged by mobile charger with directional antenna and by energy trading for balancing. Sensors, 17(1), 122.
  • Moraes, Celso, and Dongsoo Har. “Charging distributed sensor nodes exploiting clustering and energy trading.” IEEE Sensors Journal 17.2 (2016): 546-555.
  • Usman, Muhammad, Dongsoo Har, and Insoo Koo. “Energy-efficient infrastructure sensor network for ad hoc cognitive radio network.” IEEE Sensors Journal 16.8 (2016): 2775-2787. 
  • Bae, Y. S., Song, J. I., Har, D., & Kim, D. Y. (2015). Beam propagation analysis on thickness measurements in quantitative phase microscopy. Optical Review, 22(4), 532-538.
  • Tayebi, B., Jafarfard, M. R., Sharif, F., Song, Y. S., Har, D., & Kim, D. Y. (2015). Large step-phase measurement by a reduced-phase triple-illumination interferometer. Optics Express, 23(9), 11264-11271.
  • Park, Ieryung, Dohyun Kim, and Dongsoo Har. “MAC achieving low latency and energy efficiency in hierarchical M2M networks with clustered nodes.” IEEE Sensors Journal 15.3 (2014): 1657-1661. 
  • Shin, K., Park, I., Hong, J., Har, D., & Cho, D. H. (2015). Per-node throughput enhancement in Wi-Fi densenets. IEEE Communications Magazine, 53(1), 118-125.
  • Ryu, Hyun-Gyu, and Dongsoo Har. “Wireless power transfer for high-precision position detection of railroad vehicles.” 2015 IEEE Power, Communication and Information Technology Conference (PCITC). IEEE, 2015. 
  • Ryu, Hyun-Gyu, and Dongsoo Har. “Improved efficiency of wireless power transfer by tilting coils for wireless data communication.” 2015 International EURASIP Workshop on RFID Technology (EURFID). IEEE, 2015. 
  • Ryu, Hyun-Gyu, Sang-Keum Lee, and Dongsoo Har. “Data transmission with reduced delay for distributed acoustic sensors.” International Journal of Distributed Sensor Networks 11.11 (2015): 247612. 
  • Hong, J., Lee, W., Ha Kim, J., Kim, J., Park, I., & Har, D. (2016). Smart water grid: desalination water management platform. Desalination and Water Treatment, 57(7), 2845-2854.
  • Son, Pham Ngoc, Dongsoo Har, and Hyung Yun Kong. “Smart power allocation for secrecy transmission in reciprocally cooperative spectrum sharing.” IEEE Transactions on Vehicular Technology 64.11 (2015): 5395-5400. 
  • Ahn, Seok-Ki, Kyeongcheol Yang, and Dongsoo Har. “Evaluation of the low error-rate performance of LDPC codes over Rayleigh fading channels using importance sampling.” IEEE transactions on communications 61.6 (2013): 2166-2177. 
  • Hong, E., Kim, H., Yang, K., & Har, D. (2013). Pilot-aided side information detection in SLM-based OFDM systems. IEEE Transactions on Wireless Communications, 12(7), 3140-3147.
  • Park, J., Hong, E., Kim, H., Kim, K., & Har, D. (2013). Pilot-assisted data recovery for OFDM systems with blind selected mapping scheme and space-frequency block coding. Digital Signal Processing, 23(5), 1704-1711.
  • Hong, Eonpyo, Kiseon Kim, and Dongsoo Har. “Spectrum sensing by parallel pairs of cross-correlators and comb filters for OFDM systems with pilot tones.” IEEE Sensors Journal 12.7 (2012): 2380-2383. 
  • Ahn, C. J., Har, D., Omori, T., & Hashimoto, K. Y. (2012). Frequency symbol spreading based adaptive subcarrier block selection for OFDMA system. Digital Signal Processing, 22(3), 518-525.
  • Shah, Syed Abdul Baqi, Saeid Nooshabadi, and Dong Soo Har. “Efficient implementation of channel coding and interleaver for Digital Video Broadcasting (DVB-T2) on FPGA.” 2012 IEEE 16th International Symposium on Consumer Electronics. IEEE, 2012. 
  • Kim, H., Har, D., Mao, Z. H., Sun, M., & Lee, H. N. (2012). Efficient joint source–channel decoding of multi-state Markov sequences. IET communications, 6(9), 1038-1044.
  • Hong, Eonpyo, and Dongsoo Har. “Adaptive All-Pass Filter Achieving Low Peak-to-Average Power Ratio for OFDM Systems.” IEEE transactions on vehicular technology 60.8 (2011): 4029-4034. 
  • Tariquzzaman, M., Kim, J. Y., Na, S. Y., Kim, H. G., & Har, D. (2011). A Visual Signal Reliability for Robust Audio-Visual Speaker Identification. IEICE TRANSACTIONS on Information and Systems, 94(10), 2052-2055.
  • Hong, Eonpyo, Hyunju Kim, and Dongsoo Har. “PAPR reduction by a single adaptive all-pass filter for OFDM systems.” IEICE Electronics Express 8.19 (2011): 1633-1639.
  • Kim, H., Hong, E., Ahn, C., & Har, D. (2011). Efficient phase sequence generation for SLM scheme without side information. IEICE Electronics Express, 8(17), 1393-1398.
  • Hong, Eonpyo, and Dongsoo Har. “Peak-to-average power ratio reduction for MISO OFDM systems with adaptive all-pass filters.” IEEE transactions on wireless communications 10.10 (2011): 3163-3167.
  • Kim, H., Hong, E., Ahn, C., & Har, D. (2011). A pilot symbol pattern enabling data recovery without side information in PTS-based OFDM systems. IEEE Transactions on Broadcasting, 57(2), 307-312.
  • Park, Jihan, Eonpyo Hong, and DongSoo Har. “Low complexity data decoding for SLM-based OFDM systems without side information.” IEEE Communications Letters 15.6 (2011): 611-613.
  • Lim, S., Park, Y., Hong, E., & Har, D. (2011, October). Implementation of FPGA-based DVB-T2 modulator with multiple PLPs. In 2011 11th International Symposium on Communications & Information Technologies (ISCIT) (pp. 78-83). IEEE.
  • Hong, Eonpyo, and Dongsoo Har. “Peak-to-average power ratio reduction in OFDM systems using all-pass filters.” IEEE transactions on Broadcasting 56.1 (2009): 114-119. 
  • Hong, E., S. Min, and Dongsoo Har. “SLM-based OFDM system without side information for data recovery.” Electronics letters 46.3 (2010): 1.
  • Har, Dong-Soo, and Yousaf Zafar. “Power-on reset circuit.” U.S. Patent No. 7,816,956. 19 Oct. 2010.
  • Park, Jihan, Yongwook Jeon, and Dongsoo Har. “A fast intra prediction mode decision method based on high correlation of video sequences.” 2010 IEEE International Conference on Industrial Technology. IEEE, 2010.
  • Zafar, Yousaf, Jihan Park, and Dongsoo Har. “Random clocking induced DPA attack immunity in FPGAs.” 2010 IEEE International Conference on Industrial Technology. IEEE, 2010.
  • Hong, E., Jung, E., Hong, J., Yim, J., & Har, D. (2009). Parallel Parity Checksum and Syndrome Generation for Digital Video and Audio Transmission over Cable Channel. IEICE transactions on information and systems, 92(7), 1435-1441.
  • Kwak, S., Lee, J. G., Jung, E. G., Har, D., Ercegovac, M. D., & Lee, J. A. (2009). Exploration of Power-Delay Trade-Offs with Heterogeneous Adders by Integer Linear Programming. Journal of Circuits, Systems, and Computers, 18(04), 787-800.
  • Har, Dong-Soo, and Sun-Hee Hwang. “Space-time block coding system combined with local polynomial approximation based beamformer.” U.S. Patent No. 7,555,050. 30 Jun. 2009.
  • Har, Dong-Soo, and Dong-Wook Lee. “Montgomery multiplier for RSA security module.” U.S. Patent No. 7,519,643. 14 Apr. 2009.
  • Choi, Byung-Soo, and Dong-Soo Har. “Data transmission apparatus using asynchronous dual-rail bus and method therefor.” U.S. Patent No. 7,512,190. 31 Mar. 2009.
  • Kwak, S., Lee, H. W., Zafar, Y., Oh, M. H., & Har, D. (2009, April). Design of asynchronous msp430 microprocessor using balsa back-end retargeting. In 2009 5th Southern Conference on Programmable Logic (SPL) (pp. 223-228). IEEE.
  • Park, S. H., Lee, J. Y., Hong, E. P., Min, S. W., & Har, D. S. (2009, March). Merged SLM scheme for PAPR reduction of OFDM system with low complexity. In 2009 IEEE Sarnoff Symposium (pp. 1-5). IEEE.
  • Kim, H., Hong, E., Min, S., & Har, D. (2009, March). Carrier frequency synchronization based on pulse-pair method for 8-VSB DTV systems. In 2009 IEEE Sarnoff Symposium (pp. 1-5). IEEE.
  • Zafar, Y., and D. Har. “A novel countermeasure enhancing side channel immunity in FPGAs.” 2008 International Conference on Advances in Electronics and Micro-electronics. IEEE, 2008.
  • Kwak, Sanghoon, Jinwook Kim, and Dongsoo Har. “A novel hardware architecture of intra-predictor generator for H. 264/AVC Codec.” IEICE transactions on information and systems 91.7 (2008): 2083-2086.
  • Kwak, S., Har, D., Lee, J. G., & Lee, J. A. (2008, October). Design of Heterogeneous Adders Based on Power-Delay Tradeoffs. In 2008 Fifth IEEE International Symposium on Embedded Computing (pp. 223-226). IEEE.
  • Jung, E. G., Lee, J. G., Jhang, K. S., Lee, J. A., & Har, D. (2007). Asynchronous layered interface of multimedia socs for multiple outstanding transactions. The Journal of VLSI Signal Processing Systems for Signal, Image, and Video Technology, 46(2), 133-151.
  • Mujahid, Fahad Ali, and Dong-Soo Har. “Intellectual property module for system-on-chip.” U.S. Patent No. 7,313,672. 25 Dec. 2007.
  • Har, Dong-Soo, and Myeong-Hoon Oh. “Delay-insensitive data transfer circuit using current-mode multiple-valued logic.” U.S. Patent No. 7,282,946. 16 Oct. 2007.
  • Kang, Min-Chang, Eun-Gu Jung, and Dong-Soo Har. “Asynchronous switch based on butterfly fat-tree for network on chip application.” U.S. Patent No. 7,467,358. 16 Dec. 2008.
  • Jung, Eun-Gu, Jeong-Gun Lee, and Dong-Soo Har. “Data transmitting circuit and method based on differential value data encoding.” U.S. Patent No. 7,170,431. 30 Jan. 2007.
  • Kwak, Sanghoon, Hyunsup Shin, and Dongsoo Har. “Fast Quater-Pel Motion Estimation by Adaptive Searching Point Selection.” ITC-CSCC: International Technical Conference on Circuits Systems, Computers and Communications. 2007.
  • Hong, Eonpyo, Hyunsoo Yoon, and Dongsoo Har. “Optimum Reference Power in Automatic Gain Control Circuitry for OFDM Receivers.” ITC-CSCC: International Technical Conference on Circuits Systems, Computers and Communications. 2007.
  • Hong, E., Jung, E., Har, D., & Yim, J. (2007, July). A novel parallel parity checksum generator complying with ITU-T J. 83 annex B. In Proceedings of the Fifth IASTED International Conference on Circuits, Signals, and Systems.
  • Kim, J., Jung, E., Hong, E., Kwak, S., & Har, D. (2007, March). Implementation of High Performance Intra Predictor in H. 264. In XIII Workshop IBERCHIP (pp. 343-344).
  • Shin, H., Park, I., Park, J., Jung, E., & Har, D. LOW-POWER CONTROLLER FOR SENSOR NETWORKS.
  • Park, I., Shin, H., Park, J., Jung, E., & Har, D. (2007). Improvement of TINYOS implementation for small memory FPGA system. In XIII-IBERCHIP Workshop, IWS.
  • Kim, D., Jung, E., Park, H., Shin, H., & Har, D. (2006, December). Implementation of high performance CAVLC for H. 264/AVC video codec. In 2006 6th International Workshop on System on Chip for Real Time Applications (pp. 20-23). IEEE.
  • Mladenov, T., Mujahid, F., Jung, E., & Har, D. (2006). Bandwidth, Area Efficient and Target Device Independent DDR SDRAM Controller. In Proceedings of World Academy of Science, Engineering and Technology (Vol. 18, pp. 102-106).
  • Mladenov, T. M., Mujahid, F. A., Jung, E., & Har, D. (2006, August). Implementation of High Data Rate Stream Parsing with Data Aligning Mechanism. In 2006 IEEE International Symposium on Signal Processing and Information Technology (pp. 697-701). IEEE.
  • Park, J. H., Kwak, S. H., Mujahid, F. A., Lee, J. A., & Har, D. S. AN EFFECTIVE SCHEDULING ALGORITHM TARGETING HIGH UTILIZATION OF RECONFIGURABLE DEVICES IN RECONFIGURABLE CO-SYNTHESIS SYSTEM ARCHITECTURE.
  • Hong, E., Jung, E., Har, D., & Yim, J. (2007, July). A novel parallel parity checksum generator complying with ITU-T J. 83 annex B. In Proceedings of the Fifth IASTED International Conference on Circuits, Signals, and Systems.
  • Jung, Eun-Gu, and Dong-Soo Har. “Asynchronous reorder buffer for asynchronous on-chip bus.” IEICE transactions on electronics 88.12 (2005): 2391-2394.
  • Jung, E. G., Lee, J. G., Kwak, S. H., Jhang, K. S., Lee, J. A., & Har, D. S. (2005). Asynchronous multiple-issue on-chip bus with in-order/out-of-order completion. IEICE transactions on electronics, 88(12), 2395-2399.
  • Jung, E. G., Lee, J. G., Jhang, K. S., & Har, D. S. (2005). Differential value encoding for delay insensitive handshake protocol. IEICE transactions on information and systems, 88(7), 1437-1444.
  • Oh, Myeong-Hoon, and Dong-Soo Har. “Low delay-power product current-mode multiple valued logic for delay-insensitive data transfer mechanism.” IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 88.5 (2005): 1379-1383.
  • Lee, Dong-Wook, and Dong-Soo Har. “An area efficient approach to design self-timed cryptosystems combatting DPA attack.” IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 88.1 (2005): 331-333.
  • Hong, E. P., Jung, E. G., Fraz, H., & Har, D. S. (2005, July). Parallel 4/spl times/4 transform architecture based on bit extended arithmetic for H. 264/AVC. In International Symposium on Signals, Circuits and Systems, 2005. ISSCS 2005. (Vol. 1, pp. 95-98). IEEE.
  • Jung, E. G., Lee, J. G., Fraz, H., Jhang, K. S., Lee, J. A., & Har, D. S. (2005, July). Implementation of asynchronous reorder buffer for asynchronous on-chip bus. In International Symposium on Signals, Circuits and Systems, 2005. ISSCS 2005. (Vol. 2, pp. 773-776). IEEE.
  • Park, J. H., Kwak, S. H., Mujahid, F. A., Lee, J. A., & Har, D. S. AN EFFECTIVE SCHEDULING ALGORITHM TARGETING HIGH UTILIZATION OF RECONFIGURABLE DEVICES IN RECONFIGURABLE CO-SYNTHESIS SYSTEM ARCHITECTURE.
  • Jung, E. G., Lee, J. G., Kwak, S. H., Jhang, K. S., Lee, J. A., & Har, D. S. (2005, April). High performance asynchronous on-chip bus with multiple issue and out-of-order/in-order completion. In Proceedings of the 15th ACM Great Lakes symposium on VLSI (pp. 152-155).
  • Mujahid, F. A., Jung, E. G., Har, D. S., Hong, J. H., & Lim, H. J. (2005, November). High speed JPEG coder based on modularized and pipelined architecture with distributed control. In Pacific-Rim Conference on Multimedia (pp. 466-476). Springer, Berlin, Heidelberg.
  • Kang, Min-Chang, Eun-Gu Jung, and Dong-Soo Har. “Design of an asynchronous switch based on butterfly fat-tree for network-on-chip applications.” Pacific-Rim Conference on Multimedia. Springer, Berlin, Heidelberg, 2005.
  • Jung, E. G., Hong, E. P., Jhang, K. S., Lee, J. A., & Har, D. S. (2005, November). Self-timed interconnect with layered interface based on distributed and modularized control for multimedia SoCs. In Pacific-Rim Conference on Multimedia (pp. 500-511). Springer, Berlin, Heidelberg.
  • Mujahid, F. A., Jung, E. G., Har, D. S., Hong, J. H., & Lim, H. J. (2005, November). High speed JPEG coder based on modularized and pipelined architecture with distributed control. In Pacific-Rim Conference on Multimedia (pp. 466-476). Springer, Berlin, Heidelberg.
  • Baek, S. J., Kim, J., Kim, D. J., Har, D. S., & Kim, K. (2004). A robust recursive least square algorithm against impulsive noise. IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences, 87(9), 2463-2465.
  • Shevlyakov, Georgy, Kiseon Kim, and Dong Soo Har. “A Robust Maximin Low-Complexity Detector in Noise Models with a Bounded Variance.”
  • Jung, E. G., Lee, J. G., Har, D. S., & Jhang, K. S. (2004, July). Differential value encoding for two-phase 1-of-N delay insensitive handshake protocol in GALS systems. In The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS’04. (Vol. 2, pp. II-II). IEEE.
  • Oh, Myeong-Hoon, and Dong-Soo Har. “A novel mechanism for delay-insensitive data transfer based on current-mode multiple valued logic.” International Workshop on Power and Timing Modeling, Optimization and Simulation. Springer, Berlin, Heidelberg, 2004.
  • Choi, Byung-Soo, Jeong-A. Lee, and Dong-Soo Har. “High performance microprocessor design methods exploiting information locality and data redundancy for lower area cost and power consumption.” Asia-Pacific Conference on Advances in Computer Systems Architecture. Springer, Berlin, Heidelberg, 2004.
  • Har, Dong-Soo. “Radio Propagation Measurementsand Path Loss Formulas for Microcellular Systems.” The Journal of Korean Institute of Communications and Information Sciences 28.4A (2003): 238-246.
  • Har, Dongsoo, and Henry L. Bertoni. “Effect of anisotropic propagation modeling on microcellular system design.” IEEE transactions on vehicular technology 49.4 (2000): 1303-1313.
  • Har, Dongsoo, Ce Xu, and Howard H. Xia. “Propagation modelling for wireless local loop channel.” International Journal of Communication Systems 13.3 (2000): 231-241.
  • Har, Dongsoo, Howard H. Xia, and Henry L. Bertoni. “Path-loss prediction model for microcells.” IEEE Transactions on Vehicular Technology 48.5 (1999): 1453-1462.
  • Har, Dongsoo, Alix M. Watson, and Anthony G. Chadney. “Comment on diffraction loss of rooftop-to-street in COST 231-Walfisch-Ikegami model.” IEEE Transactions on Vehicular Technology 48.5 (1999): 1451-1452.
  • Har, Dongsoo. Effect of propagation modeling on microcellular system design. Diss. Polytechnic University, 1997.

Awards

– Best paper awards: 

IEEE Transactions on Vehicular Technology (2000),

ENICS (2008) International Conference.

IEEE APWCE (2016) International Conference.

 

– Honors: 

Minister Commendation (2016), Ministry of Land, Infrastructure, and Transport.

Research

Prof. Dongsoo Har’s research focuses on optimization of communication system operation and transportation system development with embedded artificial intelligence. In detail, his current research areas contain multimedia communication system design and implementation in ITS, communication system/network for autonomous vehicles, wireless sensor network design and implementation for ITS, high-efficiency digital system design for power grid, self-improving artificial intelligence technology, and development of deep neural networks.

 

Ongoing Research:

Artificial intelligence and its application 

AI is the intelligence exhibited by machines or software, which is the subfield of computer science. Also, AI is becoming a popular field in computer science as it has improved the human life in many areas. Application areas of AI have a huge impact on different fields of human life as expert system is widely used these days to solve the complex problems in many areas as science, engineering, business, medicine, weather forecasting. The objective of this research is to increase the quality and efficiency of applications by using AI technology. In our laboratory, AI soccer system using reinforcement learning is being studied. In the ITS, the research about accident area prediction system and feature learning employing deep learning is also being performed, and the architecture of deep neural network is being studied. Finally, the weather forecasting method is also being studied for the prediction of renewable power production.

 

Energy cloud 

The energy cloud represents a digital transformation that reconstructs power grid as a network connecting homes and businesses with a clean energy sources and services, utilizing data to help customers to customize their energy use in whatever manner suits their needs. Emerging technologies, such as cloud computing, Internet of Things, and big data, is highly utilized to achieve the energy cloud assisting the management of data and information related to energy system flow. This leads to the improvement of flexibility, solution scalability, optimization of energy use, and electric device management. The objective of this study is to present the system of power grid and develop various optimization methods considering the basic elements and requirements of the energy cloud. In our laboratory, communication network/system, optimal scheduling and management methods, distribution system design for smart grid, and weather forecasting methods are being studied for the energy cloud. 

Teaching

Prof. Dongsoo Har teaches graduate courses in Cho Chun Shik Graduate School of Mobility: Transportation Infrastructure Systems (GT507) and Special Topics on Green Railway Vehicle Technology <Wireless Link Analysis> (GT843). 

Students

Woohyeon Moon

Woohyeon Moon

M.S. candidate

Bumgeun Park

Bumgeun Park

M.S. candidate

Mishra Sumit

Mishra Sumit

M.S. candidate

Lai Dang Quoc Vinh

Lai Dang Quoc Vinh

M.S. candidate

Praveen Kumar Rajendran

Praveen Kumar Rajendran

M.S. candidate

Injoon Cho

Injoon Cho

M.S. candidate

Inhwan Kim

Inhwan Kim

M.S. candidate

Sarvar Hussain Nengroo

Sarvar Hussain Nengroo

Ph.D. candidate

Taeyoung Kim

Taeyoung Kim

Ph.D. candidate

Hojun Jin

Hojun Jin

Ph.D. candidate