Publication

Research Summary

Primary Research Interests: Wireless Sensing Systems; Mobile & Ubiquitous Computing; Wearable Sensors; Wireless Networking; Technologies for Human and Planet Health.
Main Publication Venues: networked wireless systems (NSDI, HotNets), mobile and ubiquitous computing (MobiCom, IMWUT), and biomedical circuits (ISSCC, VLSI, JSSC, CICC).
Professional Service: TPC member in ACM MobiSys, Mobisys Workshop; Reviewer in ACM IMWUT, IEEE BioCAS, EMBC, JSSC, TBioCAS, TBME, TCAS-I, JBHI
Impact: Clinical trials with 400+ patients; research demoed to 100+ corporate sponsors; highlight papers in high-visibility venues

Selected Publications (Top Conference/Journal Papers)

Underwater Environment Sensing

Battery-free wireless imaging of underwater environments [Paper] [Demo Video]

Sayed Saad Afzal, Waleed Akbar, Osvy Rodriguez, Mario Doumet, Unsoo Ha, Reza Ghaffarivardavagh, and Fadel Adib Nature Communications'22

Implantable Sensing

Wireless, Batteryless, and Secure Implantable System-on-a-Chip for 1.37mmHg Strain Sensing with Bandwidth Reconfigurability for Cross-Tissue Adaptation [Paper]

Mohamed Abdelhamid, Unsoo Ha, Utsav Banerjee, Fadel Adib, and Anantha Chandrakasan, IEEE CICC'22

mmWave Vital Sensing

WiStress: Contactless Stress Monitoring using Wireless Signals [Paper]

Unsoo Ha, Sohrab Madani, Fadel Adib, ACM IMWUT'21, ACM UbiComp'21

Contactless Seismocardiography via Deep Learning Radars [Paper]

Unsoo Ha, Salah Assana, Fadel Adib, ACM Mobicom'20

Food and Liquid Safety Sensing

Food and Liquid Sensing in Practical Environments using RFIDs [Paper]

Unsoo Ha, Junshan Leng, Alaa Khaddaj, Fadel Adib, USENIX NSDI'20

Learning Food Quality and Safety from Wireless Stickers [Paper] [CBS This Morning]

Unsoo Ha, Yunfei Ma, Zexuan Zhong, Tzu-Ming Hsu, Fadel Adib, ACM HotNets'18

Non-Invasive Brain Monitoring

A 0.8V 82.9uW In-Ear BCI Controller IC With 8.8 PEF EEG Instrumentation Amplifier and Wireless BAN Transceiver [Paper]

Jaehyuk Lee, Kyoung-Rog Lee, Unsoo Ha, Ji-Hoon Kim, Kwonjoon Lee, Surin Gweon, Jaeeun Jang, Hoi-Jun Yoo, IEEE JSSC'19

A 0.8V 82.9uW In-Ear BCI Controller System With 8.8 PEF EEG Instrumentation Amplifier and Wireless BAN Transceiver [Paper]

Jaehyuk Lee, Kyoung-Rog Lee, Unsoo Ha, Ji-Hoon Kim, Kwonjoon Lee, Surin Gweon, Jaeeun Jang, Hoi-Jun Yoo, IEEE SoVC'18

An EEG-NIRS multimodal SoC for Accurate Anesthesia Depth Monitoring [Paper]

Unsoo Ha, Jaehyuk Lee, Minseo Kim, Taehwan Roh, Sangsik Choi, Hoi-Jun Yoo, IEEE JSSC'18

A 25.2mW EEG-NIRS multimodal SoC for Accurate Anesthesia Depth Monitoring [Paper] - Session Highlighted Paper

Unsoo Ha, Jaehyuk Lee, Jihee Lee, Kwantae Kim, Minseo Kim, Taehwan Roh, Sangsik Choi, Hoi-Jun Yoo, IEEE ISSCC'17

A Wearable EEG-HEG-HRV Multimodal System with Simultaneous Monitoring of tES for Mental Health Management [Paper]

Unsoo Ha, Yongsu Lee, Hyunki Kim, Taehwan Roh, Joonsung Bae, Changhyeon Kim, Hoi-Jun Yoo, IEEE TBioCAS'15

A Wearable EEG-HEG-HRV Multimodal System with Real-time tES Monitoring for Mental Health Management [Paper]

Unsoo Ha, Yongsu Lee, Hyunki Kim, Taehwan Roh, Joonsung Bae, Changhyeon Kim, Hoi-Jun Yoo, IEEE ISSCC'15

A 2.14 mW EEG neuro-feedback processor with transcranial electrical stimulation for mental-health management [Paper]

Taehwan Roh, Kiseok Song, Hyunwoo Cho, Dongjoo Shin, Unsoo Ha, Kwonjoon Lee, Hoi-Jun Yoo, IEEE ISSCC'14

Non-Invasive Continuous Glucose Monitoring

An Impedance and Multi-wavelength Near-Infrared Spectroscopy IC for Non-invasive Blood Glucose Estimation [Paper]

Kiseok Song, Unsoo Ha, Seongwook Park, Joonsung Bae, Hoi-Jun Yoo, IEEE JSSC'15

An Impedance and Multi-wavelength Near-Infrared Spectroscopy IC for Non-invasive Blood Glucose Estimation [Paper]

Kiseok Song, Unsoo Ha, Seongwook Park, Joonsung Bae, Hoi-Jun Yoo, IEEE SoVC'14

Electrical Impedance Tomography

A 4.9mΩ-Sensitivity Mobile Electrical Impedance Tomography IC for Early Breast-Cancer Detection System [Paper]

Sunjoo Hong, Kwonjoon Lee, Unsoo Ha, Hyunki Kim, Yongsu Lee, Youchang Kim, Hoi-Jun Yoo, IEEE JSSC'14

A 4.9mΩ-Sensitivity Mobile Electrical Impedance Tomography IC for Early Breast-Cancer Detection System [Paper]

Sunjoo Hong, Kwonjoon Lee, Unsoo Ha, Hyunki Kim, Yongsu Lee, Youchang Kim, Hoi-Jun Yoo, IEEE ISSCC'14

Electrical Stimulation

An 87mA·min Iontophoresis Controller IC With Dual-Mode Impedance Sensor for Patch-Type Transdermal Drug Delivery System [Paper]

Kiseok Song, Unsoo Ha, Jaehyuk Lee, Kyeongryeol Bong, Hoi-Jun Yoo, IEEE JSSC'13

An 87mA·min iontophoresis Controller IC with Dual-mode Impedance Sensor for Patch-Type Transdermal Drug Delivery System [Paper]

Kiseok Song, Unsoo Ha, Jaehyuk Lee, Kyeongryeol Bong, Hoi-Jun Yoo, IEEE ISSCC'13

A Sub-10 nA DC-Balanced Adaptive Stimulator IC With Multi-Modal Sensor for Compact Electro-Acupuncture Stimulation [Paper]

Kiseok Song, Hyungwoo Lee, Sunjoo Hong, Hyunwoo Cho, Unsoo Ha, Hoi-Jun Yoo, IEEE TBioCAS'15

Inductive-coupling Communication

1.2 Gb/s 3.9 pJ/b mono-phase pulse-modulation inductive-coupling transceiver for mm-range board-to-board communication [Paper]

Hyunwoo Cho, Unsoo Ha, Taehwan Roh, Dongchurl Kim, Jeahyuck Lee, Yunje Oh, Hoi-Jun Yoo, IEEE ISSCC'13