Current Research Focuses
Current Research Focuses
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Machine Learning Theory and Applications
Explainable Deep Learning
(Deep) Contextual Multi-Arm Bandit Problems
Multi-Agent (Deep) Reinforcement Learning
Learning over Unreliable and Dynamic Networks
Communication, Networking, and Edge Computing
Integrated Sensing and Communications (ISAC) Systems
Semantic Communication
Edge Computing
Cybersecurity in Distributed Systems
Data Science, Stochastic Control, and Optimization
High-Dimensional Statistics for Large-Scale Noisy Data
Information Theory for Noisy Data Analysis
Distributed Learning, Control, and Optimization over Networks
Selected Publications
Selected Publications
(Please refer to my Google Scholar page for the complete list of my publications.)
Journal Publications (Learning Theory, Wireless Communication, Networking, and Edge Computing)
Journal Publications (Learning Theory, Wireless Communication, Networking, and Edge Computing)
Y. Luo, L. Pu, and C.-H. Liu, ”Computing Power and Battery Charging Management for Sustainable Edge Computing,” IEEE Trans. on Mobile Computing, vol. 24, No.3, pp. 1913-1927, Mar. 2025.
J.-Y. Wu, L.-C. Huang, and C.-H. Liu, “A Metric Topology of Deep Learning for Data Classification,” submitted to SIAM Journal on Mathematics of Data Science, Feb. 2025.
C.-H. Liu, M. Gamarra etal, ”Fundamentals of Federated Learning and Optimization with Random Client Participation”, submitted to IEEE Trans. on Neural Networks and Learning Systems, Feb. 2025.
Y. Luo, Lina Pu, J. Diao, C.-H. Liu, and A. Song, “Underwater Acoustic Reconfigurable Intelligent Surfaces: From Principle to Practice,” to appear in IEEE Communications Standards Magazine, 2025.
J.-Y.Wu, L.-C. Huang, W.-H. Li, C.-H. Liu, and R.-H. Gau, “Greedier Is Better: Selecting Multiple Neighbors per Iteration for Sparse Subspace Clustering,” Trans. on Machine Learning Research, Nov. 2023.
Y. Luo, Lina Pu, and C.-H. Liu, “CPU Frequency Scaling Optimization in Sustainable Edge Computing,” IEEE Trans. on Sustainable Computing, vol. 8, No. 2, pp. 194-207, Apr.-Jun. 2023.
L.-C. Wang, H. Gaˇcanin, D. Niyato, Y.J. Chen, C.-H. Liu, and A. Anpalagan,” Artificial Intelligence for Autonomous Vehicular Communication Networks”, IEEE Vehicular Technology Magazine, Vo. 17, No. 2, pp. 83-84, Feb. 2022.
C.-H. Liu, D.-C. Liang, M. A. Syed, and R.-H. Gau, “A 3D Tractable Model for UAV-Enabled Cellular Networks with Multiple Antennas,” IEEE Trans. on Wireless Communications, vol. 20, no. 6, pp. 3538-3554, Jun. 2021.
J.-Y. Wu, L.-C. Huang, M.-H. Yang, and C.-H. Liu, “Sparse Subspace Clustering via Two-Step Reweighted L1-Minimization: Algorithm and Provable Neighbor Recovery Rates,” IEEE Trans. on Information Theory, vol. 67, no. 2, pp. 1216-1263, Feb. 2021.
C.-H. Liu, D.-C. Liang, K.-C. Chen, and R.-H. Gau, “Ultra-Reliable and Low-Latency Communications Using Proactive Multi-cell Association,” IEEE Trans. on Communications, vol. 69, no. 6, pp. 3879-3897, Jun. 2021.
K.-C. Chen, S.-C. Lin, J.-H. Hsiao, C.-H. Liu, A. F. Molisch, and G. Fettweis, “Wireless Networked Multi-Robot Systems in Smart Factories,” Proceedings of the IEEE, vol. 109, no. 4, pp. 468-494, Apr. 2021.
C.-H. Liu, Y.-H. Shen, and C.-H. Lee, “Energy-Efficient Activation and Uplink Transmission for Cellular IoT,” IEEE Internet of Things Journal, vol. 7, no. 2, pp. 906-921, Feb. 2020.
C.-H. Liu, K.-H. Ho, and J.-Y. Wu, “MmWave UAV Networks with Multi-cell Association: Performance Limit and Optimization,” IEEE Journal on Selected Areas in Communications, vol. 37, no. 12, pp. 2814-2831, Dec. 2019.
C.-H. Liu, Z.-K. Yang, and D.-C. Liang, “Generalized SIR Analysis for Stochastic Heterogeneous Wireless Networks: Theory and Applications,” vol. 65, no. 9, pp. 6230-6254, IEEE Trans. on Information Theory, Sep. 2019.
C.-H. Liu and H.-M. Hu, “Full-Duplex Heterogeneous Networks with Decoupled User Association: Rate Analysis and Traffic Scheduling,” IEEE Trans. on Communications, vol. 67, no. 3, pp. 2084-2100, Mar. 2019.
C.-H. Liu, “Coverage-Rate Tradeoff Analysis in mmWave Heterogeneous Cellular Networks”, IEEE Trans. on Communications, vol. 67, no. 2, pp. 1720-1736, Feb. 2019.
C.-H. Liu and C.-S. Hsu, “Fundamentals of Simultaneous Wireless Information and Power Transmission in Heterogeneous Networks: A Cell Load Perspective”, IEEE Journal on Selected Areas in Communications, vol. 37, no. 1, pp. 100-115, Jan. 2019.
C.-H. Liu and D.-C. Liang, “Heterogeneous Networks with Power-Domain NOMA: Coverage, Throughput, and Power Allocation Analysis”, IEEE Trans. on Wireless Communications, vol. 17, no. 5, pp. 3524-3539, May 2018.
B. Zhang, C.-H. Liu, J. Tang et al., “Learning-based energy-efficient data collection by unmanned vehicles in smart cities,” IEEE Trans. on Industrial Informatics, vol. 14, no. 4, pp. 1666-1676, Dec. 2017.
C.-H. Liu and H.-C. Tsai, “Traffic Management for Heterogeneous Networks with Opportunistic Unlicensed Spectrum Sharing”, IEEE Trans. on Wireless Communications, vol. 16, no. 9, pp. 5717-5731, Sep. 2017.
C.-H. Liu and H.-C. Tsai, “On the Limits of Coexisting Coverage and Capacity in Multi-RAT Heterogeneous Networks”, IEEE Trans. on Wireless Communications, vol. 16, no. 5, pp. 3086-3101, May 2017.
C.-H. Liu and K. L. Fong, “Fundamentals of Downlink Green Coverage and Energy Efficiency in Heterogeneous Networks”, IEEE Journal on Selected Areas in Communications, vol. 34, no. 12, pp. 3271-3287, Dec. 2016.
C.-H. Liu and L.-C.Wang, “Optimal Cell Load and Throughput in Green Small CellNetworks with Generalized Cell Association,” IEEE Journal on Selected Areas in Communications, vol. 34, no. 5, pp. 1058-1072, May 2016.
X. Ding, C.-H. Liu et al., “Coexisting Success Probability and Throughput of Multi-RAT Wireless Networks with Unlicensed Band Access,” IEEE Wireless Communications Letters, vol. 5, no. 1, pp. 4-7, Feb. 2016.
C.-H. Liu, B. Rong, and S. Cui, “Optimal Discrete Power Control in Poisson-Clustered Ad Hoc Networks,” IEEE Trans. on Wireless Communications, vol. 14, no. 1, pp. 138-151, Jan. 2015.
P. Xia, C.-H. Liu and J. G. Andrews, “Downlink Coordinated Multi-Point with Overhead Modeling in Heterogeneous Cellular Networks,” IEEE Trans. on Wireless Communications, vol. 12, no. 8, pp. 4025-4037, Aug. 2013.
C.-H. Liu and J. G. Andrews, “Ergodic Transmission Capacity of Wireless Ad Hoc Networks with Interference Management,” IEEE Trans. on Wireless Communications, vol. 11, no. 6, pp. 2136-2147, Jun. 2012.
C.-H. Liu and J. G. Andrews, “Multicast Outage Probability and Transmission Capacity of Multihop Wireless Networks,” IEEE Trans. on Information Theory, vol. 57, no. 7, pp. 4344-4358, Jul. 2011.
Conference Papers
Conference Papers
R.-H. Gau, D.-C. Liang, and C.-H. Liu, “Edge-to-cloud Latency Aware User Association in Heterogeneous Hierarchical Federated Learning,” in Proc. of IEEE Vehicular Technology Conference (VTC), Spring 2024.
C.-H. Liu, N. Thawdar, and J.-Y. Wu, “On the Performance Limits of RIS-Assisted Massive MIMO Systems,” in Proc. of IEEE Int. Conf. on Commun. (ICC), June 2024.
F. Freitag, L.Wei, C.-H. Liu, Me. Selimi, and L. Veiga, “Server-side Adaptive Federated Learning overWireless Mesh Network,” in Proc. of Int. Conf. on Information Technology & Systems, 2023.
P.-C. Hsu, L.-H. Shen, C.-H. Liu, and K.-T. Feng, ”Federated Deep Reinforcement Learning for THz-Beam Search with Limited CSI”, in Proc. of IEEE Vehicular Technology Conference (VTC), Fall 2022.
C.-H. Liu, D.-C. Liang, R-H. Gau, and L. Wei, “Modeling and Analysis of Intermittent Federated Learning Over Cellular-Connected UAV Networks,” In Proc. of IEEE Vehicular Technology Conference (VTC), Spring 2022.
C.-H. Liu, K.-T. Feng, L. Wei, and Y. Luo, “Spatio-Temporal Federated Learning for Massive Wireless Edge Networks”, in Proc. of IEEE Int. Conf. on Commun. (ICC), May 2022.
C.-H. Liu, M. D. Syed, and L. Wei, “Toward Ubiquitous and Flexible Coverage of UAV-IRS-Assisted NOMA Networks”, in Proc. of IEEE Wireless Communication and Networking Conference (WCNC), Apr. 2022.
S. A. Jawdeh, S. Choi, and C.-H. Liu, “Model-Based Deep Learning for Cyber-Attack Detection in Electric Drive Systems,” in Proc. of IEEE Applied Power Electronics Conf. (APEC), Mar. 2022.
F. Freitag, P. Vilchez, L. Wei, C.-H. Liu, and M. Selimi, “Performance Evaluation of Federated Learning Over Wireless Mesh Networks with Low-Capacity Devices,” Int. Conf. on Information Technology & Systems, Feb. 2022.
F. Freitag, P. Vilchez, L. Wei, C.-H. Liu, M. Selimi, and I. Koutsopoulos, “An Experimental Environment Based On Mini-PCs For Federated Learning Research,” in Proc. of IEEE 19th Annual Consumer Commun. & Net. Conf. (CCNC), Jan. 2022.
F. Freitag, P. Vilchez, L. Wei, C.-H. Liu, and M. Selimi, “Poster: Testbed in Wireless City Mesh Network with Application to Federated Learning Experiment,” in Proc. of the 11th Int. Conf. on the Internet of Things, Nov. 2021.
Y. Luo, L. Pu, and C.-H. Liu, “Optimal CPU Frequency Scaling Policies for Sustainable Edge Computing,” in Proc. of IEEE Int. Symp on Personal, Indoor, and Mobile Radio Commun. (PIMRC), Sep. 2021.
C.-H. Liu, Y. Luo, and L. Pu, “A Multi-Cell Open-Loop Communication Approach to Ultra-Reliable Mobile Networks,” in Proc. of IEEE Int. Symp on Personal, Indoor, and Mobile Radio Commun. (PIMRC), Sep. 2021.
C.-H. Liu, D.-C. Liang, and R.-H. Gau, “A 3D Modeling Approach to Tractable Analysis in UAV-Enabled Cellular Networks”, in Proc. of IEEE Int. Conf. on Commun., Jun. 2021.
J.-Y.Wu, W.-H. Li, L.-C. Huang, Y.-P. Lin, C.-H. Liu, and R.-H. Gau, “Deterministic Coherence-Based Performance Guarantee for Noisy Sparse Subspace Clustering using Greedy Neighbor Selection”, in Proc. of IEEE Sensor Array and Multichannel Signal Processing Workshop, Jun. 2020.
J.-Y. Wu, L.-C. Huang, W.-H. Li, H.-H. Chan, C.-H. Liu, and R.-H. Gau, “Sparse Subspace Clustering with Linear Subspace-Neighborhood-Preserving Data Embedding,” in Proc. of IEEE Sensor Array and Multichannel Signal Processing Workshop, Jun. 2020. (Invited)
C.-H. Liu, D.-C. Liang, and R.-H. Gau, “On Achieving High PHY-Layer Security in D2D-Enabled Heterogeneous Networks”, in Proc. of IEEE VTC Fall, 2019.
C.-H. Liu, “Energy Efficiency Optimization of Heterogeneous Networks with SWIPT: A Cell-Load Perspective”, in Proc. of IEEE VTC Fall, 2019.
J.-Y.Wu, L.-C. Huang, M.-H. Yang, L.-H. Chang, and C.-H. Liu, “Sparse Subspace Clustering With Sequentially Ordered and Weighted L1 - Minimization”, in Proc. of IEEE Int. Conf. Image Processing, Sep. 2019.
J.-Y. Wu, L.-C. Huang, M.-H. Yang, L.-H. Chang, and C.-H. Liu, “Enhanced Noisy Sparse Subspace Clustering via Reweighted L1-Minimization”, in the Proc. of IEEE Int. Workshop on Machine Learning for Signal Processing, Sep. 2018.
C.-H. Liu and H.-M. Hu, “Decoupled Rate-Optimal User Association for Full-Duplex Heterogeneous Networks”, in the Proc. of IEEE Int. Conf. Commun. (ICC), May 2018.
H.-M. Hu and C.-H. Liu, “Throughput Regions and Opportunistic Scheduling for Full-Duplex HetNets with Decoupled User Association”, in the Proc. of IEEE Int. Conf. Commun. (ICC), May 2018.
C.-H. Liu, “An Analytical Model-Free Coverage Framework for Heterogeneous Device-to-Device Networks”, in the Proc. of IEEE WiOpt, May 2018.
C.-H. Liu and D.-C. Liang, “Towards Accurate Throughput Analysis for Dense Heterogeneous Networks with Cooperative NOMA”, in the Proc. of IEEE Globecom, Dec. 2017.
C.-H. Liu, D.-C. Liang, P.-C. Chen and J.-R. Yang, “Coverage Analysis for Dense Heterogeneous Networks with Cooperative NOMA”, in the Proc. of IEEE VTC, Spring 2017. (invited)
C.-H. Liu and H.-C. Tsai, “Decentralized Traffic Management for Heterogeneous Networks with Opportunistic Unlicensed Spectrum Sharing”, in the Proc. of IEEEWiOpt, May 2017.
C.-H. Liu, D.-C. Liang, J.-R. Yang and J. Chen, “A Generalized Analytical Framework for Coverage Evaluation in mmWave Heterogeneous Cellular Networks in Urban Areas”, in the Proc. of IEEE Int. Conf. Commun.(ICC), May 2017.
C.-H. Liu and P.-C. Chen, “Load-Aware Coordinated Multipoint Joint Transmission in Dense Heterogeneous Networks: Downlink Coverage and Throughput Limits”, in the Proc. of IEEE Int. Conf. Commun. (ICC), May 2017. (Finalist for the Best Paper Award)
H.-M. Hu, C.-H. Liu, and K.-C. Chang, “Full-Duplex Heterogeneous Networks: Ergodic Rate Analysis with Realistic Interference Modeling”, in the Proc. of IEEE Wireless Commun. and Net. Conf. (WCNC), Mar. 2017.
C.-H. Liu, “On the Energy Efficiency Limit of Dense Heterogeneous Cellular Networks”, in the Proc. of IEEE Globecom, Dec. 2016.
H.-C. Tsai, C.-H. Liu and L.-C. Wang, “An Analytical Approach to Coexisting Evaluation in Multi-RAT Heterogeneous Networks with Opportunistic CSMA/CA”, in the Proc. of IEEE Int. Conf. Commun. (ICC), May 2016.
C.-H. Liu, L.-C. Wang, “Modeling and Analysis of Coexisting Multiple Radio Access Technologies in HeterogeneousWireless Networks”, in the Proc. of IEEE ICNC, Feb. 2016 (Invited).
C.-H. Liu and L.-C. Wang, “On the Optimality of Green Cell Load and Throughput in Small Cell Networks with Weighted Channel-Aware Cell Association”, in the Proc. of IEEE Globecom, Dec. 2015.
K. L. Fong,C.-H. Liu, et al. “Energy-Efficient Cell Association and Load Analysis in Heterogeneous Cellular Networks”, in the Proc. of IEEE Globecom (HetNetWorkshop) 2015.
C.-H. Liu and L.-C.Wang, “Random Cell Association and Void Probability in Poisson-distributed Cellular Networks”, in the Proc. of IEEE Int. Conf. Commun. (ICC), Jun. 2015.
C.-T. Peng, L.-C.Wang, C.-H. Liu, “Optimal Base Station Deployment for Small Cell Networks with Energy-Efficient Power Control”, in the Proc. of IEEE Int. Conf. Commun. (ICC), Jun. 2015.
M. G. Khoshkholgh et al., “On the Impact of Delay Constraint on the Multicast Outage in Wireless Fading
Environment”, in the Proc. of IEEE Int. Conf. Commun. (ICC), Jun. 2015.
C.-H. Liu, “Adaptive Downlink CoMP in Heterogeneous Cellular Networks with Imperfect Overhead Messaging”, in the Proc. of IEEE Globecom, Dec. 2014. (Received Best Paper Award)
J. Chen, L.-C. Wang and C.-H. Liu, “Coverage Probability of Small Cell Networks with Composite Fading and Shadowing”, in the Proc. of IEEE PIMRC, Sept. 2014.
C.-H. Liu, “Distributed Interfer-Channel Aware Scheduling in Large-Scale Wireless Ad Hoc Networks,” in the Proc. of IEEE Globecom, Dec. 2013.
C.-H. Liu and Y.-C. Tsai, “Distributed Dynamic Scheduling in Wireless Ad Hoc Networks with Spatial Randomness,” in the Proc. of IEEE Globecom, Dec. 2013.
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