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K. J. Ray Liu

Ministry of Public Security of the People's Republic of China · CN
Area of research
Electrical and Electronic Engineering · Computer Networks and Communications
Research interest
Research interests include Cooperative Communication and Network Coding, Indoor and Outdoor Localization Technologies, Advanced MIMO Systems Optimization, and Advanced Wireless Communication Techniques.
h-index
80
citations
23,809
works
682
NIH funding
—
primary concept
—
email
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Recent publications

Poster Abstract: Robust Deep Learning Based Residential Occupancy Detection With WiFi
Proceedings of the 23rd ACM Conference on Embedded Networked Sensor Systems 2025cited by 3position: contributordoi
Poster: Efficient Passive Tracking using Commodity WiFi with Single-Shot Training
Proceedings of the 23rd Annual International Conference on Mobile Systems, Applications and Services 2025cited by 0position: contributordoi
Wi-MoID: Human and Nonhuman Motion Discrimination Using WiFi With Edge Computing
IEEE Internet of Things Journal 2024cited by 10position: contributordoi
<i>RadioVAD</i>: mmWave-Based Noise and Interference-Resilient Voice Activity Detection
IEEE Internet of Things Journal 2024cited by 4position: contributordoi
Robust In-Car Child Presence Detection using Commercial WiFi
Proceedings of the 30th Annual International Conference on Mobile Computing and Networking 2024cited by 3position: contributordoi
What you need is a good CSI
Proceedings of the 30th Annual International Conference on Mobile Computing and Networking 2024cited by 1position: contributordoi
Demo: Practical WiFi Sensing for Human and Non-human Motion Identification on the Edge
Proceedings of the 22nd Annual International Conference on Mobile Systems, Applications and Services 2024cited by 0position: contributordoi
Audioradio Target Speech Detection and Extraction with mmWave Sensing
Proceedings of the 30th Annual International Conference on Mobile Computing and Networking 2024cited by 0position: contributordoi
RadioMic: Sound Sensing via Radio Signals
IEEE Internet of Things Journal 2023cited by 30position: contributordoi
EZMap: Boosting Automatic Floor Plan Construction With High-Precision Robotic Tracking
IEEE Internet of Things Journal 2023cited by 11position: contributordoi
Robust Passive Proximity Detection Using Wi-Fi
IEEE Internet of Things Journal 2023cited by 8position: contributordoi
Driver Vital Signs Monitoring Using Millimeter Wave Radio
IEEE Internet of Things Journal 2022cited by 110position: contributordoi
DeFall: Environment-Independent Passive Fall Detection Using WiFi
IEEE Internet of Things Journal 2022cited by 90position: contributordoi
GaitCube: Deep Data Cube Learning for Human Recognition With Millimeter-Wave Radio
IEEE Internet of Things Journal 2022cited by 51position: contributordoi
In-Vehicle Sensing for Smart Cars
IEEE Open Journal of Vehicular Technology 2022cited by 45position: contributordoi
WiCPD: Wireless Child Presence Detection System for Smart Cars
IEEE Internet of Things Journal 2022cited by 36position: contributordoi
<i>mmKey</i>: Universal Virtual Keyboard Using A Single Millimeter-Wave Radio
IEEE Internet of Things Journal 2022cited by 15position: contributordoi
RF-Based Indoor Moving Direction Estimation Using a Single Access Point
IEEE Internet of Things Journal 2022cited by 4position: contributordoi
mmHRV: Contactless Heart Rate Variability Monitoring Using Millimeter-Wave Radio
IEEE Internet of Things Journal 2021cited by 164position: contributordoi
ViMo: Multiperson Vital Sign Monitoring Using Commodity Millimeter-Wave Radio
IEEE Internet of Things Journal 2021cited by 119position: contributordoi
SMARS: Sleep Monitoring via Ambient Radio Signals
IEEE Transactions on Mobile Computing 2021cited by 117position: contributordoi
GaitWay: Monitoring and Recognizing Gait Speed Through the Walls
IEEE Transactions on Mobile Computing 2021cited by 90position: contributordoi
mmEye: Super-Resolution Millimeter Wave Imaging
IEEE Internet of Things Journal 2021cited by 62position: contributordoi
<i>mmWrite</i>: Passive Handwriting Tracking Using a Single Millimeter-Wave Radio
IEEE Internet of Things Journal 2021cited by 58position: contributordoi
Massive MIMO for High-Accuracy Target Localization and Tracking
IEEE Internet of Things Journal 2021cited by 27position: contributordoi
Distributed Newton's Method for Network Cost Minimization
IEEE Transactions on Automatic Control 2021cited by 21position: contributordoi
Robust Detection of Image Operator Chain With Two-Stream Convolutional Neural Network
IEEE Journal of Selected Topics in Signal Processing 2020cited by 167position: contributordoi
Respiration Tracking for People Counting and Recognition
IEEE Internet of Things Journal 2020cited by 77position: contributordoi
Wireless AI in Smart Car: How Smart a Car Can Be?
IEEE Access 2020cited by 47position: contributordoi
EasiTrack: Decimeter-Level Indoor Tracking With Graph-Based Particle Filtering
IEEE Internet of Things Journal 2020cited by 44position: contributordoi

Grants

Manipulating Nanoparticle-Modified Melt Pool Dynamics in Additive Manufacturing
NSF1934367$873,9322019–2024PIRePORTER
Data-driven Multiscale Damage and Failure Prediction
NSF1762035$569,0402018–2022PIRePORTER
CIF: Small: Toward Trustworthy Information Forensics and Anti-Forensics
NSF1320803$500,0002013–2017PIRePORTER
SBIR Phase I: Biogas Upgrading via An Innovative Membrane Designed for Small Scale, Low Pressure Streams with Bulk Contaminants
NSF1013719$150,0002010–2011PIRePORTER
Modeling of Endothelial Cell Adhesion Dynamics Modulated by Experimental Molecular Engineering
NSF0856333$370,9892009–2012PIRePORTER
SBIR Phase I: One-Step MembraneReactor-based Process for Conversion of Biomass Gasifier Off-gas to Syngas Ready for Alternative Fuel Syntheses
NSF0839653$99,9992009–2009PIRePORTER
Computational Multiresolution Mechanics of Solids and Structures
NSF0823327$150,0002008–2011PIRePORTER
STTR Phase I: Development of Multi-Functional Membrane-Based Reactor for High Alcohol Synthesis
NSF0740806$149,9902008–2009PIRePORTER
US-Taiwan Workshop on Simulation-Based Engineering and Science (SBE&S) in Enabling Transforming Technology
NSF0806036$48,0002008–2009PIRePORTER
SBIR Phase II: An Engineered Diffusion Barrier for Preparation of Pd Membranes on Tubular Porous Stainless Steel Substrate
NSF0620528$683,3682006–2010PIRePORTER
Wafer-scale bio/nano filament assembly for chem/bio sensors
NSF0510212$299,9992005–2008PIRePORTER
SBIR Phase I: An Engineered Diffusion Barrier for Preparation of Pd Membranes on Tubular Porous Stainless Steel Substrate
NSF0512797$100,0002005–2005PIRePORTER
Collaborative Research: Experimental and Multi-Scale Modeling Investigation of Atomic Lattice Stick-Slip Friction
NSF0409688$220,9772004–2008PIRePORTER
Summer Institute on Nano Mechanics and Materials
NSF0318907$545,1602003–2008PIRePORTER
Modeling of Nanoscale Systems and Processes
NSF0330902$249,5092003–2006PIRePORTER
SBIR Phase I: A Solid State Proton Conductor as a Hydrogen Pump
NSF0232481$100,0002003–2003PIRePORTER
SBIR Phase I: A Hydrothermally Stable H2 Selective SiC Membrane for Membrane Reactor Appliction
NSF0232698$100,0002003–2003PIRePORTER
A Multi-Scale Approach for Predicting Wrinkling and its Experimental Validation
NSF0115079$369,2202001–2005PIRePORTER
LCE: Simulation-Based Design environment by Meshfree Particle Methods
NSF9979661$180,0391999–2003PIRePORTER
The Third International Conference on Fracture, Corrosion and Fracture December 8-11, 1997 at Hong Kong University of Science and Technology
NSF9610515$15,0001997–1998PIRePORTER
Structural Dynamics by Multiple Scale Analysis
NSF9503117$150,0001996–2000PIRePORTER
McNU 97, The Joint ASME/ASCE/SES Summer Meeting
NSF9616705$4,5001996–1997PIRePORTER
Adaptive Finite Element Methods for Unsteady Lubricated Metal Forming Processes
NSF9300675$24,9941995–1996PIRePORTER
NSF Young Investigator: High Performance Computing for Signal Processing
NSF9457397$312,5001994–2003PIRePORTER
ENGINEERING RESEARCH EQUIPMENT: Equipment for Video\Multimedia Transmission and Networking Research
NSF9310732$84,7201993–1995PIRePORTER

Frequent collaborators

— · 36 papers (2019–2025)Beibei Wang · Zhejiang Sci-Tech University30 papers (2019–2025)Chenshu Wu · University of Maryland, College Park17 papers (2020–2024)Feng Zhang · Wuhan University12 papers (2020–2023)Yuqian Hu · 7 papers (2021–2025)Xiaolu Zeng · Beijing Institute of Technology7 papers (2020–2024)Muhammed Zahid Ozturk · University of Maryland, College Park6 papers (2022–2025)Min Wu · Princeton University5 papers (2019–2024)Fengyu Wang · Beijing University of Posts and Telecommunications5 papers (2020–2022)Guozhen Zhu · University of Maryland, College Park5 papers (2023–2025)Sai Deepika Regani · 3 papers (2020–2022)Xuanyu Cao · Hong Kong University of Science and Technology3 papers (2019–2021)Ke Xiong · Tsinghua University2 papers (2017–2017)Beibei Wang · University of Maryland, College Park2 papers (2017–2017)Sakila S. Jayaweera · Elsevier, Inc.2 papers (2024–2025)Qinyi Xu · Southeast University2 papers (2019–2020)Wei-Hsiang Wang · University of Maryland, College Park2 papers (2024–2025)Xiangui Kang · Sun Yat-sen University1 papers (2013–2013)Yusen Fan · Menlo School1 papers (2022–2022)Yan Chen · University of Science and Technology of China1 papers (2019–2019)