Assistant Professor, Department of Computer Science, Florida State University
Director of XL-Stack Lab
Website | Google Scholar | GitHub | LinkedIn
I lead XL-Stack Lab, where we build research prototypes across wireless sensing, backscatter communication, physical-layer security, integrated sensing and communication, RAN systems, and foundation-model-assisted networking.
Our long-term goal is to connect NextG wireless networks, cyber-physical systems, and Physical AI through reproducible systems, measurements, and code.
- Assistant Professor at Florida State University.
- Former Postdoctoral Scholar at the NSF AI-EDGE Institute, The Ohio State University.
- Ph.D. from University of Maryland, Baltimore County, advised by Prof. Ting Zhu.
- Research background: wireless communication, networking, sensing, security, and machine-learning-enabled networks.
- Engineering background: high-precision measurement instruments, high-speed and high-power circuits, embedded systems, MCUs, FPGAs, DSPs, ARMs, sensors, lasers, and motor/mechanical control.
| Project | Paper / Area | Code |
|---|---|---|
| BFMScan | IMWUT/UbiComp 2026; explicit angle-resolved Wi-Fi sensing from the beamforming feedback matrix (BFM) of a single commodity device pair | 26UbiComp_BFMScan |
| GeoMotionGPT | EMNLP 2026; geometry-aligned motion understanding with large language models | GeoMotionGPT |
| 2FiA | IEEE S&P 2026; WiFi sensing-based human authentication with unique physiological biometrics, combining respiration and heartbeat | Zenodo Artifact |
| 0Cal | SenSys 2026; zero-calibration sensing/scanning system for millimeter-wave calibration | 26SenSys_0cal |
| O-JRC | Computer Networks 2025; open-source mmWave MIMO-OFDM joint radar-communication experimentation platform | O-JRC |
| FTP | INFOCOM 2024; millimeter-wave networking and beam training | 24InfoCom_FTP |
| LightThief | USENIX Security 2023; optical communication security and encoded-light backscatter | 23Security_LightThief |
| TScatter | NSDI 2021; WiFi OFDM backscatter | 21NSDI_TScatter |
| VMscatter | NSDI 2020; WiFi MIMO backscatter | 20NSDI_VMscatter |
- Backscatter communication and sensing
- Visible-light communication and optical wireless security
- Integrated sensing and communication
- NextG wireless networks and RAN intelligence
- Physical-layer security
- Cyber-physical systems and Physical AI
- Foundation models for networked systems
- Reproducible systems research
| Course Materials | Link |
|---|---|
| Operating Systems | FSU-COP4610-Operating-Systems |
| Computer Security | FSU-CIS5370-Computer-Security |
| Future Edge Networks | FSU-CIS4930-CIS5930-Future-Edge-Networks |
- Email: xliu15 [at] fsu [dot] edu
- Office: Love Building, Room 160
- Address: Department of Computer Science, Florida State University
For publications, students, news, and CV, please visit xlstacklab.github.io.