Chun-Hung Liu, Ph.D.

Assistant Professor

Dept. of Electrical and Computer Engineering

Mississippi State University

Mississippi State, MS 39762, USA

e-mail: chliu at ece dot msstate dot edu

Phone (O): (662) 325-2063

Chun-Hung Liu, Ph.D.

Assistant Professor

Dept. of Electrical and Computer Engineering

Mississippi State University

Mississippi State, MS 39762, USA

e-mail: chliu at ece dot msstate dot edu

Phone (O): (662) 325-2063

Brief Biography

Dr. Liu is an Assistant Professor in the Department of Electrical and Computer Engineering at Mississippi State University (MSU). Prior to joining MSU, he was with University of Michigan and National Chiao Tung University, Hsinchu Taiwan. He received a B.S. degree from National Taiwan University, an M.S. degree from Massachusetts Institute of Technology, and a Ph.D. degree in Electrical and Computer Engineering from the University of Texas at Austin. He was a recipient of the Best Paper Award from IEEE Globecom Conference in 2008 and 2014, a recipient of the Excellent Young Scholar Grant Award from the Ministry of Science and Technology of Taiwan in 2015, and a recipient of the Outstanding Advisor Award from the Taiwan Institute of Electrical and Electronic Engineering in 2016. He is a senior member of IEEE.

Research Interests

- Machine Learning and Its Applications in Wireless Systems
- Edge Computing, Intelligence, and Distributed Learning Systems
- Data Science
- Signal Processing and Image Processing
- Cybersecurity
- Cyber-physical Systems

Recent News

- 07/2022: Received a research grant from NSF to work on high-dimensional data analysis and learning from noisy limited data.
- 07/2022: There will be a couple of PhD research openings in my group starting from Spring/Fall 2023. Interested students who have good background in machine learning, networking, and statistics feel free to send your resume to me. I will reply you if you are a good fit for the openings.
- 07/2022: Received a research grant from AFRL to work on spectrum sensing and learning problems in UAV-enabled networks with intelligent reconfigurable surfaces.
- 03/2022: Our paper entitled "Modeling and Analysis of Intermittent Federated Learning Over Cellular-Connected UAV Networks" was accepted by IEEE VTC Spring 2022.

Research Topics

- Topic I: Distributed Learning over Ultra-Dense Wireless Networks with Repulsion
- Topic II: Machine Learning for 6G Wireless Systems
- Topic III: Federated Sensing, Learning, and Security for Large-Scale Wireless CPSs
- Topic IV: High-Dimensional Data Analysis and Large-Scale Learning

Selected Publications

## Recent Book Chapter

## Journal Articles

#### Learning over Large-Scale Networks and Data Analysis

## Conference Papers

- Deep Learning and Federated Learning Toward 6G Mobile Communications in the new book entitled "Flexible and Cognitive Radio Access Technologies for 5G and Beyond", the Institution of Engineering and Technology, Oct. 2020. (ISBN-10: 1839530790)

- 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", submitted to IEEE Trans. on Information Theory, Apr. 2022. **C.-H. Liu**, K.-T. Feng, and L. Wei, "Robust Federated Edge Learning", to be submitted to IEEE Trans. on Neural Networks and Learning Systems, 2022.**C.-H. Liu**, L. Wei, K.-T. Feng, and J.-Y. Wu, "Spatio-Temporal Intermittent Federated Learning over Massive Edge Networks", to be submitted to IEEE Trans. on Wireless Communications, 2022.- 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**, L.-H. Shen, and K.-T. Feng, "Multi-Antenna Communication with Reconfigurable Intelligent Surfaces: Modeling, Analysis, and Optimal Learning Control", working draft (to be submitted to IEEE Trans. on Wireless Communications), 2021. - Y. Luo, L. Pu, and
**C.-H. Liu**, "CPU Frequency Scaling Optimization in Sustainable Edge Computing", submitted to IEEE Trans. on Mobile Computing, Aug. 2021. -
**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. **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.- L. Wei,
**C.-H. Liu**, Y.-C. Liang, and Z. Bai, "Matrix Integral Approach to MIMO Mutual Information Statistics in High-SNR Regime", Entropy, vol. 21, no. 11, an. 1071, Nov. 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.**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 Cell Networks 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.- N.-M. Cheung, O. Au, M.-C. Kung, P. Wong,
**C.-H. Liu**, "Highly parallel rate-distortion optimized intra-mode decision on multicore graphics processors", IEEE Trans. on Circuits and Systems for Video Technology, vol. 19, no. 11, pp. 1692-1703, Nov. 2009. - C.-H. Liu and C.-T. Kuo, "Distributed Secure Kalman Filtering in a Poisson Field of Attackers", submitted to IEEE Trans. on Signal Processing, Dec. 2021. (Under Revision)
- C.-H. Liu, "Secure Estimation and Control in Wireless Cyber-Physical Systems: A Reinforcement Learning Approach", submitted to IEEE Trans. on Control of Network Systems, Nov. 2021. (Under Revision)

- P.-C. Hsu, L.-H. Shen,
**C.-H. Liu**, and K.-T. Feng, "Federated Deep Reinforcement Learning for THz-Beam Search with Limited CSI", submitted to IEEE 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. - 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), 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), 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 Commun. and Net. Conf. (WCNC), 2022. - F. Freitag, P. Vilchez, L. Wei,
**C.-H. Liu**, M. Selimi, and I. Koutsopoulos, "Demo: An Experimental Environment Based OnMini-PCs For Federated Learning Research", in Proc. of IEEE 19th Annual Consumer Commun. & Net. Conf. (CCNC), 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", Information Technology and Systems (ICITS). Lecture Notes in Networks and Systems, vol 414. Springer, Feb. 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 Experiments", 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. (ICC), 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**, "Energy Efficiency Optimization of Heterogeneous Networks with SWIPT: A Cell-Load Perspective", in Proc. of IEEE Vehicular Technology Conference (VTC) Fall, 2019.**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 Vehicular Technology Conference (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, 2019. - J.-Y. Wu, L.-C. Huang, M.-S. Yang, L.-H. Chang, and
**C.-H. Liu**, "Enhanced Noisy Sparse Subspace Clustering via Reweighted L1-Minimization", in the Proc. of IEEE Workshop on Machine Learning for Signal Processing, Sep. 2018. **C.-H. Liu**, "A Model-Free Framework for Coverage Evaluation in Device-to-Device Heterogeneous Networks", in the Proc. of IEEE WiOpt, May 2018.**C.-H. Liu**and H.-M. Hu, "Throughput Regions and Opportunistic Scheduling for Full-Duplex HetNets with Decoupled User Association", in the Proc. of IEEE Int. Conf. on Commun. (ICC), May 2018.- H.-M. Hu and
**C.-H. Liu**, "Decoupled Rate-Optimal User Association for Full-Duplex Heterogeneous Networks", in the Proc. of IEEE Int. Conf. on Commun. (ICC), 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**and H.-C. Tsai, "Decentralized Traffic Management for Heterogeneous Networks with Opportunistic Unlicensed Spectrum Sharing", in the Proc. of IEEE WiOpt, May 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**, 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. on 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. on Commun. (ICC), May 2017.- 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 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. on Commun. (ICC), May 2016. **C.-H. Liu**and L.-C. Wang, "Modeling and Analysis of Coexisting Multiple Radio Access Technologies in Heterogeneous Wireless 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 (HetNet Workshop) 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. on Commun. (ICC), Jun. 2015.- C.-T. Peng, L.-C. Wang, and
**C.-H. Liu**, "Optimal Base Station Deployment for Small Cell Networks with Energy-Efficient Power Control", in the Proc. of IEEE Int. Conf. on 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. on 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. (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**and Y.-C. Tsai, "Distributed Dynamic Scheduling in Wireless Ad Hoc Networks with Spatial Randomness", in the Proc. of IEEE Globecom, Dec. 2013.**C.-H. Liu**, "Distributed Interfer-Channel Aware Scheduling in Large-Scale Wireless Ad Hoc Networks", in the Proc. of IEEE Globecom, Dec. 2013.- B. Rong,
**C.-H. Liu**, and S. Cui, "Discrete Location-Dependent Power Control in Wireless Clustered Ad Hoc Networks", in the Proc. of IEEE Globecom, Dec. 2013. **C.-H. Liu**and J. G. Andrews, "Ergodic Spatial Throughput in Wireless Ad Hoc Networks with Markovian Fading Channels", in the Proc. of IEEE WiOpt, May 2011.- H.-F. Huang, Y.-F. Chang, and
**C.-H. Liu**, "Enhancement of two-factor user authentication in wireless sensor networks", in the Proc. of the Sixth Int. Conf. on Intell. Info. Hiding and Multimedia Sign. Proc., Oct. 2010. **C.-H. Liu**and J. G. Andrews, "Multicast Capacity Scaling of Wireless Networks with Multicast Outage", in the Proc. of IEEE Int. Symp. on Info. Theory (ISIT), Jun. 2010.**C.-H. Liu**and J. G. Andrews, "Diversity-Multiplexing Analysis of Multihop Network Coding with Bidirectional Relaying", in the Proc. of the 47th Allerton Conference on Communication, Control and Computing, Sep. 2009.**C.-H. Liu**and A. Arapostathis, "Joint Network Coding and Superposition Coding for Multi-user Information Exchange in Wireless Relaying Networks", in the Proc. of IEEE Globecom, Dec. 2008. (Best Paper Award)**C.-H. Liu**, O. Au, P. Wong, and M. C. Kung, "Image characteristic oriented tone mapping for high dynamic range images", in the Proc. of Multimedia and Expo, pp. 1133-1136, Jun. 2008.- Y. Kim, C. Yang, and
**C.-H. Liu**, "Throughput Analysis of Randomized Sleep Scheduling with Constrained Connectivity in Wireless Sensor Networks", in the Proc. of IEEE Globecom, Dec. 2008. **C.-H. Liu**and F. Xue, "Network Coding for Two-Way Relaying: Rate Region, Sum Rate and Opportunistic Scheduling", in the Proc. of IEEE Int. Conf. on Commun. (ICC), May 2008.- F. Xue,
**C.-H. Liu**, and S. Sandhu, "MAC-Layer and PHY-Layer Network Coding for Two-Way Relaying: Achievable Rate Regions and Opportunistic Scheduling", the 45th Annual Allerton Conference on Communication, Control and Computing, Sep. 2007. **C.-H. Liu**, "Energy-Optimized Low Complexity Control of Power and Rate in Clustered CDMA Sensor Networks with Multirate Constraints", in the Proc. of IEEE Veh. Tech. Conf. (VTC), Fall 2007.**C.-H. Liu**and A. Arapostathis, "Distributed Stochastic Power and Rate Allocation for Energy Minimization in Wireless Sensor Networks", in the Proc. of IEEE Veh. Tech. Conf. (VTC), Sep. 2006.**C.-H. Liu**, "Low-Complexity Performance Optimization for MIMO CDMA Systems", in the Proc. of IEEE Wireless Commun. and Netw. Conf. (WCNC), Vol. 1, pp. 280-285, 2005.**C.-H. Liu**and H. H. Asada, "A Source Coding and Modulation Method for Power Saving and Interference Reduction in Wireless Sensor Network Systems", American Control Conf., Vol. 4, pp. 3003-3008, 2002.**C.-H. Liu**, E. Wade, and H. H. Asada, "Reduced cable smart motors using DC power line communications", in the Proc. of IEEE Int. Conf. on Robotics and Automation (ICRA), Vol. 4, pp. 3831-3838, 2001.