Research Area 04
Communication Systems, Hardware & Platforms
AntennasRFICsmmWave/THzPhased arraysMIMOWireless PHYQuantum signal processing and communications
Overview
xGI advances the physical foundations of future intelligent networks through innovations in communication hardware and system platforms. Research spans EM/antenna design, RF and mixed-signal circuits, phased arrays, metasurfaces, mmWave and THz integrated chip scale platforms, secure wireless physical-layer technologies, and AI-enabled RFIC and RF system design. These technologies provide the high-performance, energy-efficient infrastructure required to support future AI-native wireless networked systems.
Affiliated Faculties
Affiliated Faculties
Highlighted Publications
- S. J. Maeng, M. Chowdhury, I. Guvenc, A. Bhuyan, and H. Dai, “Base Station Antenna Uptilt Optimization for Cellular-Connected Drone Corridors,” IEEE Transactions on Aerospace and Electronic Systems, vol. 59, no. 4, pp. 4729-4737, Aug. 2023.
- V. Reddy, J. Sober, L. Hogan, and S. Venkatesh, “I2SAC: AI-enabled Digital-Twin Framework on a mmWave 64-element Phased Array for Integrated Imaging, Sensing, and Communication,” in International Microwave Symposium, RFSA. IEEE, 2026 - Accepted.
- Liu, Yuan, John M. Martyn, Jasmine Sinanan-Singh, Kevin C. Smith, Steven M. Girvin, and Isaac L. Chuang. “Toward mixed analog-digital quantum signal processing: Quantum ad/da conversion and the fourier transform.” IEEE Transactions on Signal Processing (2025).
- A. Fallah Dizche, A. Duel-Hallen and H. Hallen, “Early Warning of mmWave Signal Blockage Using Diffraction Properties and Machine Learning,” in IEEE Communications Letters, vol. 26, no. 12, pp. 2944-2948, Dec. 2022, doi: 10.1109/LCOMM.2022.3204636.
- C. K. Anjinappa, F. Erden, and I. Guvenc, “Base Station and Passive Reflectors Placement for Urban mmWave Networks”, IEEE Trans. Vehicular Technol., Feb. 2021.
- N. Nguyen, K. Lee, and H. Dai, “Hybrid Beamforming and Adaptive RF Chain Activation for Cell-Free Millimeter-Wave Massive MIMO Systems,” IEEE Trans. Vehicular Technology, vol. 71, no. 8, pp. 8739-8755, Aug. 2022.
- S. J. Maeng, C. K. Anjinappa, I. Guvenc, “Coverage Probability Analysis of Passive Reflectors in Indoor Environments”, IEEE Commun. Lett., July 2022.
- Z. Ali, A. Duel-Hallen and H. Hallen, “Early Warning of mmWave Signal Blockage and AoA Transition Using sub-6 GHz Observations,” in IEEE Communications Letters, vol. 24, no. 1, pp. 207-211, Jan. 2020, doi: 10.1109/LCOMM.2019.2952602.
- X. Lu, S. Venkatesh, B. Tang and K. Sengupta, “Physical Layer Security Through Directional Modulation With Spatio-Temporal Millimeter-Wave Transmitter Arrays,” in IEEE Journal of Solid-State Circuits, vol. 59, no. 9, pp. 2831-2847, Sept. 2024, doi: 10.1109/JSSC.2024.3384373.
- W. A. G. Khawaja, O. Ozdemir, Y. Yapici, F. Erden, and I. Guvenc, “Coverage Enhancement for NLOS mmWave Links Using Passive Reflectors”, IEEE Open J. Communication Society, Feb. 2020.
- D. D. Stancil, A. R. Allen, M. Ptak and J. J. Adams, “Multipath-Enhanced Measurement of Antenna Patterns: Experiment,” in IEEE Transactions on Antennas and Propagation, doi: 10.1109/TAP.2026.3681345.
- J. Tang, J. Liu, X. He, L. Xie, L. Qu, and H. Dai, “Deep Reinforcement Learning for AoI-Aware Trajectory and Phase-shift Design in IRS-Assisted UAV Data Collection,” IEEE Trans. Wireless Communications, vol. 24, no. 12, pp. 10613-10628, Dec. 2025.
- A. P. Ganesh, A. Perre, A. Şahin, İ. Güvenç and B. A. Floyd, “A mmWave Software-Defined Array Platform for Wireless Experimentation at 24-29.5 GHz,” MILCOM 2024 - 2024 IEEE Military Communications Conference (MILCOM), Washington, DC, USA, 2024, pp. 1-6, doi: 10.1109/MILCOM61039.2024.10773829.
- N. Nguyen, K. Lee, and H. Dai, “Application of Deep Learning to Sphere Decoding for Large MIMO Systems,” IEEE Trans. Wireless Communications, vol. 20, no. 10, pp. 6787-6803, Oct. 2021.
- Z. Song, J. An, H. Ding, and H. Dai, “Optimal Relay Probing for UAV Millimeter Wave Communications with Beam Training Overhead,” IEEE Trans. Vehicular Technology, vol. 72, no. 6, pp. 7351-7363, Jun. 2023.
- R. Mahdavihaji, A. Duel-Hallen and H. Hallen, “Impact of Reflectors and MIMO on ML-Aided mmWave/sub-THz Blockage Prediction,” 2026 IEEE 23rd Consumer Communications & Networking Conference (CCNC), Las Vegas, NV, USA, 2026, pp. 1-6, doi: 10.1109/CCNC65079.2026.11366462.
- T. Ren, Y. Chang and B. A. Floyd, “39–44 GHz Phased-Array Transmitter Circuits in RFSOI CMOS Technology,” in IEEE Journal of Solid-State Circuits, vol. 60, no. 9, pp. 3072-3081, Sept. 2025, doi: 10.1109/JSSC.2025.3580121.
- S. J. Maeng, Y. Yapici, I. Guvenc, A. Bhuyan, and H. Dai, “Precoder Design for Physical-Layer Security and Authentication in Massive MIMO UAV Communications”, IEEE Trans. Veh. Technol., Dec. 2021.
- A. P. Ganesh, W. Khawaja, O. Ozdemir, and I. Guvenc, “Propagation Measurements and Coverage Analysis for mmWave and Sub-THz Frequency Bands with Transparent Reflectors”, in Proc. IEEE Veh. Technol. Conf. (VTC), Florence, Italy, June 2023.