The rise of chronic diseases and the growing demand for personalized treatments drive our exploration of continuous monitoring systems. Our wireless and wearable sensing technologies are designed to continuously track vital signs and body movement (with IRB approval), with the goal of giving healthcare providers a deeper and more accurate understanding of a patient’s condition. These valuable data can enable early detection and prevention, personalized, adaptive treatment plans, and improve patient engagement and quality of life—all while potentially reducing healthcare costs.

To achieve high accuracy and robustness, we are pursuing a hardware-software co-design approach. On the hardware side, we are developing advanced metasurfaces—engineered arrays of subwavelength cells designed to manipulate waves in ways conventional materials cannot—to dramatically enhance sensing resolution through careful tuning of geometry, material properties, and spatial arrangement. On the software side, we are building advanced machine learning algorithms to integrate multi-modality data. Meanwhile, to achieve ease of use, we are developing simple, user-friendly sensing approaches that can run on commodity devices, such as smartphones, smart speakers, smart watches, and earphones, which require minimal user intervention.

Publication

• Acoustic Sensing and Communication using Metasurface. Yongzhao Zhang, Yezhou Wang, Lanqing Yang, Mei Wang, Yi-Chao Chen, Lili Qiu, Yihong Liu, Guangtao Xue, and Jiadi Yu. In Proc. of NSDI 2023.
• PMSat: Optimizing Passive Metasurface for Low Earth Orbit Satellite Communication. Hao Pan, Lili Qiu, Bei Ouyang, Yongzhao Zhang, Shiecheng Zheng, Yi-Chao Chen, Guangtao Xue. ACM MobiCom 2023.
• Addressing Practical Challenges in Acoustic Sensing To Enable Fast Motion Tracking. Yongzhao Zhang, Hao Pan, Yi-Chao Chen, Lili Qiu, Yu Lu, Guangtao Xue, Jiadi Yu, Feng Lyu, and Haonan Wang. In Proc. of IPSN 2023.
• Unsupervised video anomaly detection for stereotypical behaviours in autism. Jiaqi Gao, Xinyang Jiang, Yuqing Yang, Dongsheng Li, Lili Qiu. In Proc. of ICASSP 2023.
• End-to-End Word-Level Pronunciation Assessment with MASK Pre-training Yukang Liang, Kaitao Song, Shaoguang Mao, Huiqiang Jiang, Luna K. Qiu, Yuqing Yang, Dongsheng Li, Linli Xu, Lili Qiu. INTERSPEECH 2023.
• Adaptive Metasurface-Based Acoustic Imaging using Joint Optimization. Yongjian Fu, Yongzhao Zhang, Yu Lu, Lili Qiu, Yi-Chao Chen, Yezhou Wang, Mei Wang, Yijie Li, Ju Ren, Yaoxue Zhang. ACM MobiSys, June 2024.
• AutoMS: Automated Service for mmWave Coverage Optimization using Low-cost Metasurfaces. Ruichun Ma, Shicheng Zheng, Hao Pan, Lili Qiu, Xingyu Chen, Liangyu Liu, Yihong Liu, Wenjun Hu, Ju Ren. ACM MobiCom, Nov. 2024.
• GPSense: Passive Sensing with Pervasive GPS Signals. Huixin Dong, Minhao Cui, Ning Wang, Lili Qiu, Jie Xiong, Wei Wang. ACM MobiCom, Nov. 2024.
• GPMS: Enabling Indoor GNSS Positioning using Passive Metasurfaces. Yezhou Wang, Hao Pan, Lili Qiu, Linghui Zhong, Jiting Liu, Ruichun Ma, Guangtao Xue, Ju Ren. ACM MobiCom, Nov. 2024.
• MuDiS: An Audio-independent, Wide-angle, and Leak-free Multi-directional Speaker. Yijie Li, Juntao Zhou, Dian Ding, Yi-Chao Chen, Lili Qiu, Jiadi Yu, Guangtao Xue. ACM MobiCom, Nov. 2024.