Journal Papers

[J29] M. Na, J. Lee, G. Choi, T. Yu, J. Choi, J. Lee, S. Bahk, “Operator’s Perspective on 6G: 6G Services, Vision, and Spectrum,” IEEE Communications Magazine, vol. 62, no. 8, pp. 178-184, Aug. 2024 (IF: 8.3, 5.5% JCR’23) [IEEEXplore]

[J28] S. Lim, J. Jung, E. Lee, J. Choi, and S.-C. Kim, “In-Vehicle Passenger Occupancy Detection Using 60 GHz FMCW Radar Sensor,” IEEE Internet of Things Journal, vol. 11, no. 4, pp. 7002-7012, Feb. 2024 (IF: 10.6, <2.2% JCR’22) [IEEEXplore]

[J27] E. Lee, K.-M. Park, B.-h. Lee, S.-C. Kim, and J. Choi*, “CNN-Based Real-Time Walking Direction Estimation for Pedestrian Navigation Scenario,” IEEE Sensors Journal, vol. 24, no. 1, pp. 1042-1050, Jan. 2024 [IEEEXplore]

[J26] K.-M. Park, B.-h. Lee, E. Lee, S.-C. Kim and J. Choi*, “GPS-Aided Automatic Site Survey Method for WiFi RTT-Based Positioning,” IEEE Transactions on Vehicular Technology, vol. 72, no. 10, pp. 13,120-13,129, Oct. 2023 (IF: 6.239, <15% JCR’21) [IEEEXplore]

[J25] J. Choi*, “Automatic Site Survey for RSS-Based Wi-Fi Positioning Using Unlabeled Data,” IEEE Transactions on Vehicular Technology, vol. 72, no. 8, pp. 11,063-11,067, Aug. 2023 (IF: 6.239, <15% JCR’21) [IEEEXplore]

[J24] K.-M. Park, E. Lee, J. Choi, and S.-C. Kim “Automated Site Survey for Fingerprints in Fully-Blind Indoor Environments Based on Sensor Integration,” IEEE Sensors Letters, vol. 7, no. 1, Jan. 2023 [IEEEXplore]

[J23] S. Lim, J. Jung, B.-h Lee, J. Choi, and S.-C. Kim “Radar Sensor Based Estimation of Vehicle Orientation for Autonomous Driving,” IEEE Sensors Journal, vol. 22, no. 22, pp. 21,924-21,932, Nov. 2022 [IEEEXplore]

[J22] J. Choi*, “Sensor-Aided Learning for Wi-Fi Positioning with Beacon Channel State Information,” IEEE Transactions on Wireless Communications, vol. 21, no. 7, pp. 5251-5264, July 2022 (IF:7.016, <8% JCR’20) [Paper] [IEEEXplore] [Demo Video]

[J21] J. Song, J.-H. Lee, S. Noh, and J. Choi, “Millimeter Wave Reflection Pattern Codebook Design for RIS-Assisted V2V Communications,” IEEE Transactions on Vehicular Technology, vol. 71, no. 6, pp. 6819-6824, June 2022 (IF:5.978, <12% JCR’20) [IEEEXplore]

[J20] J. Song, S.-H. Hyun, J.-H. Lee, J. Choi, and S.-C. Kim, “Joint Vehicle Tracking and RSU Selection for V2I Communications with Extended Kalman Filter,” IEEE Transactions on Vehicular Technology, vol. 71, no. 5, pp. 5609-5614, May 2022 (IF:5.978, <12% JCR’20) [Paper] [IEEEXplore]

[J19] J. Choi*, “Enhanced Wi-Fi RTT Ranging: A Sensor-Aided Learning Approach,” IEEE Transactions on Vehicular Technology, vol. 71, no. 4, pp. 4428-4437, Apr. 2022 (IF:5.978, <12% JCR’20) [Paper] [IEEEXplore]

[J18] B.-h. Lee, D. Ham, J. Choi, S.-C. Kim, and Y.-H. Kim, “Genetic Algorithm for Path Loss Model Selection in Signal Strength Based Indoor Localization,” IEEE Sensors Journal, vol. 21, no. 21, pp. 24,285-24,296, Nov. 2021 (IF:3.301, JCR’20) [IEEEXplore]

[J17] J. Choi* and Y.-S. Choi, “Calibration-Free Positioning Technique Using Wi-Fi Ranging and Built-In Sensors of Mobile Devices,” IEEE Internet of Things Journal, vol. 8, no. 1, pp. 541-554, Jan. 2021 (IF:9.936, <2% JCR’20) [Paper] [IEEEXplore] [Demo Video]

[J16] F. Potorti et al. (incl. J. Choi), “The IPIN 2019 Indoor Localisation Competition-Description and Results,” IEEE Access, vol. 8, pp. 206,674-206,718, Nov. 2020 [Paper] [IEEEXplore]

[J15] J. Choi*, Y.-S. Choi, and S. Talwar, “Unsupervised Learning Techniques for Trilateration: From Theory to Android App Implementation,” IEEE Access, vol. 7, pp. 134,525-134,528, Sept. 2019 [Paper] [IEEEXplore & Demo Video]

[J14] J.-H. Lee, J. Choi, W.-H. Lee, and J. Song, “Array Pattern Synthesis Using Semidefinite Programming and a Bisection Method,” ETRI Journal, vol. 41, no. 5, pp. 619-625, May 2019

[J13] J.-H. Lee, J. Choi, W.-H. Lee, and J. Song, “Exploiting Array Pattern Synthesis for Physical Layer Security in Millimeter Wave Channels,” Electronics, vol. 8, no. 7, p. 745, July 2019

[J12] V.-H. Nguyen, M.-T. Nguyen, J. Choi, and Y.-H. Kim, “NLOS Identification in WLANs Using Deep LSTM with CNN Features,” Sensors, vol. 18, no. 11, p. 4057, Nov. 2018

[J11] J. Yoon, O. Jo, J.-W. Choi, S. Lee, J. Choi, and S.-C. Kim, “SNR Analysis and Estimation for Efficient Phase Noise Mitigation in Millimetre-Wave SC-FDE Systems,” IET Communications, vol. 12, no. 18, pp. 2347-2356, Nov. 2018

[J10] J. Choi, W.-H. Lee, J.-H. Lee, J.-H. Lee, and S.-C. Kim, “Deep Learning Based NLOS Identification with Commodity WLAN Devices,” IEEE Transactions on Vehicular Technology, vol. 67, no. 4, pp. 3295-3303, Apr. 2018 (IF:4.432, <8% JCR’18) [Paper] [IEEEXplore]

[J9] J.-H. Lee, J. Choi, J.-Y. Lee, and S.-C. Kim, “28 GHz Millimeter-Wave Channel Models in Urban Microcell Environment Using Three-Dimensional Ray Tracing,” IEEE Antennas and Wireless Propagation Letters, vol. 17, no. 3, pp. 426-429, Mar. 2018 [IEEEXplore]

[J8] J.-H. Lee, J. Choi, and S.-C. Kim, “Cell Coverage Analysis of 28 GHz Millimeter Wave in Urban Microcell Environment Using 3-D Ray Tracing,” IEEE Transactions on Antennas and Propagation, vol. 66, no. 3, pp. 1479-1487, Mar. 2018 [IEEEXplore]

[J7] W.-H. Lee, J. Choi, Y.-H. Kim, J.-H. Lee, and S.-C. Kim, “Adaptive Sector Coloring Game for Geometric Network Information-Based Inter-Cell Interference Coordination in Wireless Cellular Networks,” IEEE/ACM Transactions on Networking, vol 26, no. 1, pp. 288-301, Feb. 2018

[J6] W.-T. Yu, J. Choi, W.-H. Lee, and S.-C. Kim, “Relay-Assisted Load Balancing Scheme Based on Practical Throughput Estimation,” IEICE Transactions on Communications, vol. E101.B, no. 1, pp. 242-252, Jan. 2018

[J5] W.-H. Lee, J. Choi, W.-T. Yu, J.-H. Lee, and S.-C. Kim, “Asymmetric Transmission Game for Interference Coordination in Wireless Ad-Hoc Relay Networks,” IEICE Transactions on Communications, vol. E100.B, no. 5, pp. 826-836, May 2017

[J4] J.-H. Lee, J. Choi, W.-H. Lee, J.-W. Choi, and S.-C. Kim, “Measurement and Analysis on Land-to-Ship Offshore Wireless Channel in 2.4 GHz,” IEEE Wireless Communications Letters, vol. 6, no. 2, pp. 222-225, Apr. 2017

[J3] W.-H. Lee, J. Choi, J.-H. Lee, Y.-H. Kim, and S.-C. Kim, “Distributed Power Control-Based Connectivity Reconstruction Game in Wireless Localization,” IEEE Communications Letters, vol. 21, no. 2, pp. 334-337, Feb. 2017

[J2] J. Choi, W.-H. Lee, Y.-H. Kim, J.-H. Lee, and S.-C. Kim, “Throughput Estimation Based Distributed Base Station Selection in Heterogeneous Networks,” IEEE Transactions on Wireless Communications, vol. 14, no. 11, pp. 6137-6149, Nov. 2015 (IF:2.925, <10% JCR’15) [IEEEXplore]

[J1] J. Choi, Y.-H. Kim, J.-H. Lee, S. Bahk, and S.-C. Kim, “User Throughput Estimation for the PF Scheduling Algorithm under MIMO Channel Environments,” IEEE Wireless Communication Letters, vol. 1, no. 5, pp. 528-531, Oct. 2012

(* indicates that J. Choi is the corresponding author of the papers)

Book Chapter

[B1] J. Choi, Y.-S. Choi, and S. Talwar, “Localization with Wi-Fi Ranging and Built-in Sensors: Self-Learning Techniques”, in Machine Learning for Indoor Localization and Navigation, S. Tiku and S. Pasricha, Springer, 2023, pp101-130 [Springer]

Conference Papers

[C11] J. Lee, J. Kim, Y. Shin, J. Choi, J. Lee, M. Na, “Comparative Analysis of Pathloss at 28 GHz and 140 GHz Frequencies in Identical Environment,” IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Valencia, Spain, 2024

[C10] H. An, H. Gu, S. Joo, J. Choi, “Crowdsourced Wi-Fi Access Point Localization using Vertical Movement Detection,” 13th International Conference on Indoor Positioning and Indoor Navigation (IPIN), Nuremberg, Germany, 2023 [IEEEXplore]

[C9] S. Lim, J. Jung, J. Kim, S.-C. Kim, and J. Choi, “Enhanced Velocity Estimation Based on Joint Doppler Frequency and Range Rate Measurements,” International Conference on Ubiquitous and Future Networks (ICUFN), Barcelona, Spain, 2022 [IEEEXplore]

[C8] J. Choi, Y.-S. Choi, and S. Talwar, “Unsupervised Learning Technique to Obtain the Coordinates of Wi-Fi Access Points,” International Conference on Indoor Positioning and Indoor Navigation (IPIN), Pisa, Italy, 2019 (Winner of smartphone-based positioning competition)[IEEEXplore] [Competition Results]

[C7] J. Choi, J. Bai, S.-P. Yeh, Y.-S. Choi, and S. Talwar, “Full-Duplex Self-Backhaul Small Cell: Capacity Gain and Traffic Adaptation,” IEEE International Conference on Communications Workshops (ICC Workshops), Kensas City, MO, USA, 2018

[C6] J.-H. Lee, J. Choi, J.-Y. Lee, and S.-C. Kim, “Experimental Results of a Land-to-Ship Propagation Channel Using a Wideband Channel Sounding System at 2.4 GHz,” International Conference on Computing, Networking and Communications (ICNC), Maui, HI, USA, 2018

[C5] J.-H. Lee, J. Choi, J.-Y. Lee, and S.-C. Kim, “Permittivity Effect of Building Materials on 28 GHz mmWave Channel Using 3D Ray Tracing Simulation,” IEEE Global Communications Conference (GLOBECOM), Singapore, 2017

[C4] J. Choi, W.-H. Lee, Y. Kim, and S.-C. Kim, “Dynamic User Association and eICIC Management in Heterogeneous Cellular Networks,” IEEE International Conference on Communications (ICC), Kuala Lumpur, Malaysia, 2016

[C3] J.-H. Lee, J. Choi, and S.-C. Kim, “Internodal Distance Distribution and Wireless Link Analysis in Uniform Finite Random Network,” IEEE Vehicular Technology Society Asia Pacific Wireless Communications Symposium (APWCS), Ping Tung, Taiwan, 2014

[C2] W.-T. Yu, J. Choi, and S.-C. Kim, “Relay-Assisted Dynamic Load Balancing Scheme in Multi-Cell Cellular Networks,” IEEE Vehicular Technology Conference (VTC), Seoul, South Korea, 2014

[C1] J. Choi, J.-W. Choi, and S.-C. Kim, “An Improved Throughput Estimation Method and Dynamic User Association in Multi-Cell Networks,” IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), London, UK, 2013

Patents

[P8] J. H. Lee, M. S. Na, K. P. Lee, G. W. Choi, J. S. Choi, J. Y. Lee, Terminal Device and Beam Tracking Method, (South Korea) KR 10-2024-0020506, Feb. 2024 (Filed)

[P7] J. H. Lee, M. S. Na, K. P. Lee, G. W. Choi, J. S. Choi, J. Y. Lee, Terminal Device and Optimal Beam Selecting Method, (South Korea) KR 10-2024-002282, Feb. 2024 (Filed)

[P6] S. C. Kim, E. J. Lee, and J. S. Choi, Method of Estimating Heading Offset for Pedestrian Dead Reckoning and Appratus for the Same, (South Korea) KR 10-2022-0177225, Dec. 2022 (Filed)

[P5] M. R. Akdeniz et al. (incl. J. Choi), Systems and Methods for Distributed Learning for Wireless Edge Dynamics, (PCT) PCT/US2020/067068, Dec. 2020 (Filed)

[P3] J. Choi and Y.-S. Choi, Parameter Update for Range-Based Positioning, (United States) US 11,778,584, Oct. 2023 (Issued), (Brazil) BR 10 2020 019659 6, Sept. 2020 (Filed), (Germany) DE 10 2020 127974.4, Oct. 2020 (Filed)

[P2] J. Choi, V. N. Ekambaram, and Y.-S. Choi, Machine Learning Techniques for Precise Position Determination, (United States) US 11,887,007, Jan 2024 (Issued), (Europe) 20 214 977.9, Dec. 2020 (Filed)

[P1] S.-C. Kim and J. Choi, Method and Apparatus for Estimating Long-Term Transfer Rate of Terminal, (South Korea) KR 10-1452589, Oct. 2014 (Issued), (United States) US 16/424,945, Sept. 2015 (Issued)