Publications

Ongoing Works:

[*J22] H. Wymeersch, H. Chen, H. Guo, M. F. Keskin, B. M. Khorsandi, M. H. Moghaddam, A. Ramirez, K. Schindhelm, A. Stavridis, T. Svensson, and V. Yajnanarayana. “6G Positioning and Sensing Through the Lens of Sustainability, Inclusiveness, and Trustworthiness.” Submitted to IEEE Vehicular Technology Magazine, Sep. 2023. [preprint]
[*J21] M. Ammous, H. Chen, H. Wymeersch and S. Valaee. “Zero Access Points 3D Cooperative Sidelink Positioning via Reconfigurable Intelligent Surface.” Submitted to IEEE Transactions on Mobile Computing, May. 2023. [preprint] \

Articles:

[A1] H. Chen, and H. Wymeersch. “Phone signals can help you find your way in cities even without GPS.” Nature News & Views, 2022. [paper]

Journal Papers:

[J20] E. Ibrahim, H. Chen, Z. Ye, R. Ghazalian, H. Kim, R. Nilsson, H. Wymeersch, and J. Beek.. “Inferring Direction and Orientation from Polarized Signals: Feasibility and Bounds.” IEEE Open Journal of the Communications Society. 2024. [paper]
[J19] Y. Ge, H. Khosravi, F. Jiang, H. Chen, S. Lindberg, P. Hammarberg, H. Kim, O. Brunnegard, O. Eriksson, B.E. Olsson, F. Tufvesson, L. Svensson, and H. Wymeersch. “Experimental Validation of Single BS 5G mmWave Positioning and Mapping for Intelligent Transport.” IEEE Transactions on Vehicular Technologies. 2024. [preprint][paper]
[J18] F. Zhu, X. Wang, C. Huang, A. Alhammadi, H. Chen, Z. Zhang, C. Yuen, M. Debbah.. “Beamforming Inferring byConditional WGAN-GP for Holographic Antenna Arrays.” IEEE Wireless Communications Letters. 2024. [paper]
[J17] H. Chen, P. Zheng, M.F. Keskin, T.Y. Al-Naffouri and H. Wymeersch. “Multi-RIS-Enabled 3D Sidelink Positioning.” IEEE Transactions on Wireless Communications, 2024. [preprint]
[J16] H. Chen, M.F. Keskin, A. Sakhnini, N. Decarli, S. Pollin, D. Dardary, and H. Wymeersch. ``6G Localization and Sensing in the Near Field: Features, Opportunities and Challenges.” IEEE Wireless Communications, 2024. [preprint]
[J15] H. Chen, M.F. Keskin, S. Aghdam, H. Kim, S. Lindberg, A. Wolfgang, T.E. Abrudan, T. Eriksson, and H. Wymeersch. “Modeling and Analysis of OFDM-based 5G/6G Localization under Hardware Impairments.” IEEE Transactions on Wireless Communication, Nov. 2023. [preprint]
[J14] P. Zheng, H. Chen, T. Ballal, M. Valkama, H. Wymeersch and T.Y. Al-Naffouri. “JrCUP: Joint RIS Calibration and User Positioning for 6G Wireless Systems.” IEEE Transactions on Wireless Communications, Nov. 2023. [preprint]
[J13] P. Zheng, T. Ballal, H. Chen, H. Wymeersch, and T.Y. Al-Naffouri. “Coverage Analysis of Joint Localization and Communication in THz Systems with 3D Arrays.” IEEE Transactions on Wireless Communications, Oct. 2023. [preprint]
[J12] R. Ghazalian, H. Chen, G.C. Alexandropoulos, G. Seco-Granados, H. Wymeersch, and R. Jantti. “Joint User Localization and Location Calibration of A Hybrid Reconfigurable Intelligent Surface.” IEEE Transactions on Vehicular Technology, 2023. [preprint] [paper]
[J11] H. Kim, H. Chen, M.F. Keskin, Y. Ge, K. Keykhosravi, G.C. Alexandropoulos, S. Kim, and H. Wymeersch. “RIS-Enabled and Access-Point-Free Simultaneous Radio Localization and Mapping.” IEEE Transactions on Wireless Communications, 2023. [preprint] [paper]
[J10] H. Chen, H. Kim, M. Ammous, G. Seco-Granados, G.C. Alexandropoulos, S. Valaee, and H. Wymeersch. “RISs and Sidelink Communications in Smart Cities: The Key to Seamless Localization and Sensing.” IEEE Communications Magazine, 2023. [preprint] [paper]
[J9] A. Behravan, V. Yajnanarayana, M.F. Keskin, H. Chen, D. Shrestha, T.E. Abrudan, T. Svensson, K. Schindhelm, A. Wolfgang, S. Lindberg, and H. Wymeersch. “Positioning and sensing in 6G: Gaps, Challenges and Opportunities.” IEEE Vehicular Technology Magazine, 2023. [preprint] [paper]
[J8] H. Chen, T. Ballal, M. Eltayeb, and T.Y. Al-Naffouri. “Antenna Selection in Switch-Based MIMO Array via DOA Threshold Region Approximation.” IEEE Transactions on Vehicular Technology, 2022. [preprint] [paper] [code]
[J7] X. Liu, T. Ballal, H. Chen, and T.Y. Al-Naffouri. “Constrained Wrapped Least Squares: A Tool for High Accuracy GNSS Attitude Determination.” IEEE Transactions on Instrumentation and Measurement, 2022. [preprint] [paper]
[J6] H. Chen, H. Sarieddeen, T. Ballal, H. Wymeersch, M.S. Alouini, and T.Y. Al-Naffouri. “A Tutorial on Terahertz-Band Localization for 6G Communication Systems.” IEEE Communications Surveys & Tutorials, 2022. [preprint] [paper] [code]
[J5] S. Tarboush, H. Sarieddeen, H. Chen, M.H. Loukil, H. Jemma, M.S. Alouini, and T.Y. Al-Naffouri. “TeraMIMO: A Channel Simulator for Wideband Ultra-Massive MIMO Terahertz Communications.” IEEE Transactions on Vehicular Technology, 2021. [preprint] [paper] [code]
[J4] H. Chen, T. Ballal, and T.Y. Al-Naffouri. “DOA Estimation with Non-Uniform Linear Arrays: A Phase-Difference Projection Approach.” IEEE Wireless Communications Letters, 2021. [preprint] [paper] [code]
[J3] X. Ma, T. Ballal, H. Chen, O. Aldayel, and T.Y. Al-Naffouri. “A Maximum-Likelihood TDOA Localization Algorithm Using Difference-of-Convex Programming.” IEEE Signal Processing Letters, 2021. [paper]
[J2] H. Chen, T. Ballal, A.H. Muqaibel, X. Zhang, and T.Y. Al-Naffouri. “Air-writing via Receiver Array-based Ultrasonic Source Localization.” IEEE Transactions on Instrumentation and Measurement, 2020. [paper] [video]
[J1] H. Chen, T. Ballal, N. Saeed, M.S. Alouini, and T.Y. Al-Naffouri. “A Joint TDOA-PDOA Localization Approach Using Particle Swarm Optimization.” IEEE Wireless Communications Letters, 2020. [paper] [material] [code]

Conference Papers:

[C17] P. Zheng, H. Chen, T. Ballal, H. Wymeersch, T. Y. Al-Naffouri. “Misspecified Cramer-Rao Bound of RIS-Aided Localization Under Geometry Mismatch.” IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 2023. [preprint]
[C16] H. Kim, A. Fascista, H. Chen, Y. Ge, G.C. Alexandropoulos, G. Seco-Granados, and H. Wymeersch. “RIS-Aided Monostatic Sensing and Object Detection with Single and Double Bounce Multipath.” IEEE International Conference on Communications (ICC) Workshop, 2023. [preprint]
[C15] R. Ghazalian, H. Chen, G.C. Alexandropoulos, G. Seco-Granados, H. Wymeersch, and R. Jantti. “RIS Position and Orientation Estimation via Multi-Carrier Transmissions and Multiple Receivers.” IEEE International Conference on Communications (ICC), 2023.
[C14] Y. Lu, H. Chen, J. Talvitie, H. Wymeersch, and M. Valkama. “Joint RIS Calibration and Multi-User Positioning.” IEEE Vehicular Technology Conference-Fall Workshop, 2022. [preprint] [paper]
[C13] H. Chen, F. Jiang, Y. Ge, H. Kim, and H. Wymeersch. “Doppler-Enabled Single-Antenna Localization and Mapping without Synchronization.” IEEE Global Communications Conference (GLOBECOM), 2022. [preprint] [paper]
[C12] H. Chen, A. Elzanaty, R. Ghazalian, M.F. Keskin, R. Jantti, and H. Wymeersch. “Channel Model Mismatch Analysis for XL-MIMO Systems from a Localization Perspective.” IEEE Global Communications Conference (GLOBECOM), 2022. [preprint] [paper]
[C11] Y. Ge, O. Kaltiokallio, H. Chen, F. Jiang, J. Talvitie, M. Valkama, L. Svensson, and H. Wymeersch. “Exploiting Doppler in Bistatic mmWave Radio SLAM.” IEEE Global Communications Conference (GLOBECOM), 2022. [preprint] [paper]
[C10] P. Zheng, T. Ballal, H. Chen, H. Wymeersch, and T.Y. Al-Naffouri. “Localization Coverage Analysis of THz Communication Systems with a 3D Array.” IEEE Global Communications Conference (GLOBECOM), 2022. [preprint] [paper]
[C9] R. Ghazalian, K. Keikhorsravi, H. Chen, H. Wymeersch, and R. Jantti. “Bi-Static Sensing for Near-Field RIS Localization.” IEEE Global Communications Conference (GLOBECOM), 2022. [preprint] [paper]
[C8] Y. Ge, H. Chen, F. Jiang, M. Zhu, H. Khosravi, S. Lindberg, H. Herbertsson, O. Eriksson, O. Brunnegard, B.E. Olsson, P. Hammarberg, F. Tufvesson, L. Svensson, and H. Wymeersch. “Experimental Validation of Single Base Station 5G mmWave Positioning: Initial Findings.” IEEE International Conference on Information Fusion (FUSION), 2022. [paper]
[C7] H. Wymeersch, A. Parssinen, T.E. Abrudan, A. Wolfgang, K. Haneda, M. Sarajlic, M.E. Leinonen, M.F. Keskin, H. Chen, S. Lindberg, P. Kyosti, T. Svensson, and X. Yang. “6G Radio Requirements to Support Integrated Communication, Localization, and Sensing.” European Conference on Networks and Communications (EUCNC) & 6G Summit. 2022. [preprint] [paper] [video]
[C6] H. Chen, , S. Aghdam, M.F. Keskin, Y. Wu, S. Lindberg, A. Wolfgang, U. Gustavsson, T. Eriksson, and H. Wymeersch. “MCRB-based Performance Analysis of 6G Localization under Hardware Impairments.” IEEE International Conference on Communications (ICC) Workshop, 2022. [preprint] [paper]
[C5] H. Chen, T. Ballal, and T.Y. Al-Naffouri. “Phase-difference-based 3-D Source Localization Using a Compact Receiver Configuration.” European Signal Processing Conference (EUSIPCO, IEEE), 2021. (Oral). [paper]
[C4] H. Chen, T. Ballal, X. Liu, and T.Y. Al-Naffouri. “Realtime 2-D DOA Estimation using Phase-Difference Projection (PDP).” European Signal Processing Conference (EUSIPCO, IEEE), 2019. (Oral). [paper] [code]
[C3] H. Chen, T. Ballal, and T.Y. Al-Naffouri. “A Decomposition Approach for Complex Gesture Recognition Using DTW and Prefix Tree.” IEEE Conference on Virtual Reality and 3D User Interfaces (VR), 2019. (Poster). [paper] [code]
[C2] H. Chen, T. Ballal, and T.Y. Al-Naffouri. “Fast Phase-Difference-Based DOA Estimation Using Random Ferns.” IEEE Global Conference on Signal and Information Processing (GlobalSIP), 2018. (Poster). [paper] [poster] [code]
[C1] H. Chen, T. Ballal, M. Saad and T.Y. Al-Naffouri. “Angle-of-arrival-based Gesture Recognition Using Ultrasonic Multi-frequency Signals.” European Signal Processing Conference (EUSIPCO, IEEE), 2017. (Oral). [paper] [material] [code]

Patents:

[P2] Hui Chen, Tarig Ahmed, Tareq Al-Naffouri. “Ultrasound based Air-writing System and Method.” US Patent No. 11,630,518, issued 18 Apr 2023. [patent]
[P1] Hui Chen, Tarig Ahmed, Mohamed Saadeldin, Tareq Al-Naffouri. “Angle-of-arrival-based Gesture Recognition System and Method.” US Patent No. 10,386,481, issued 20 Aug 2019. [patent]