Article
Environmental Sciences
Xiuzhu Yang, Xinyue Zhang, Yi Ding, Lin Zhang
Summary: This paper proposes a framework based on FMCW and IR-UWB radars for activity and vital sign monitoring, addressing monitoring challenges through intelligent spatial-temporal information fusion.
Article
Engineering, Electrical & Electronic
Aloysius Adya Pramudita, Ding-Bing Lin, Sung-Nien Hsieh, Erfansyah Ali, Harfan Hian Ryanu, Tjahjo Adiprabowo, Ariana Tulus Purnomo
Summary: This paper proposes a method for detecting respiratory vital signs behind a wall using an FMCW radar system. The method eliminates beat frequencies from the obstacle structure and extracts the Doppler response related to the target respiratory vital signs using phase detection. Experimental results demonstrate that the proposed method successfully eliminates the effect of the wall and extracts the respiration vital sign pattern.
IEEE SENSORS JOURNAL
(2022)
Article
Optics
Ziqian Zhang, Yang Liu, Tegan Stephens, Benjamin J. J. Eggleton
Summary: Researchers have developed a photonic radar for non-contact vital sign detection, overcoming limitations of traditional monitoring methods. The radar achieves millimetre-level range resolution with a bandwidth of up to 30 GHz. The study also explores the use of optical signals generated by the system for LiDAR-based vital sign detection, offering potential for improved accuracy and system resilience.
Article
Engineering, Electrical & Electronic
Arash Shokouhmand, Samuel Eckstrom, Behnood Gholami, Negar Tavassolian
Summary: This study develops a camera-guided FMCW radar to monitor vital signs. A novel method, SVPD, is designed to optimize the regions of interest for respiratory rate and heart rate monitoring. Experimental results demonstrate high accuracy in extracting vital signs under different conditions.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Emanuele Cardillo, Changzhi Li, Alin Caddemi
Summary: The article introduces a new technique to remove radar self-motion effects for accurate detection of human vital signs without additional sensors, by extracting RSM from signals reflected by stationary clutters. The proposed technique requires accurate clutter range identification, with two automatic identification procedures for different radar motions. Besides precise vital sign detection, it offers a compact, lightweight, comfortable, and cost-effective solution.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Review
Engineering, Electrical & Electronic
Anuradha Singh, Saeed Ur Rehman, Sira Yongchareon, Peter Han Joo Chong
Summary: This paper comprehensively reviews the current state-of-art of non-contact vital sign measurements using radar, highlighting the need to move towards higher frequency for high accuracy in a multi-resident environment. It also analyzes the implications of mmWave exposure on human health and environmental attenuation, while discussing significant challenges associated with hardware and signal processing algorithm. Finally, the review concludes with future directions and challenges associated with detecting vital signs in a multi-resident indoor environment.
IEEE SENSORS JOURNAL
(2021)
Article
Biotechnology & Applied Microbiology
Seoktae Seo, Hyunkyeong Jo, Jungho Kim, Bonyoung Lee, Franklin Bien
Summary: Despite COVID-19, timely detection and treatment of cardiovascular disease is crucial for high survival rates. Telehealth using wearable devices with vital sign sensors is not only a response to the pandemic, but also a solution to provide prompt healthcare in remote locations.
BIOENGINEERING & TRANSLATIONAL MEDICINE
(2023)
Article
Engineering, Electrical & Electronic
Yichao Yuan, Austin Ying-Kuang Chen, Chung-Tse Michael Wu
Summary: The paper presents a radar sensor architecture based on a super-regenerative oscillator for vital sign detection and motion sensing. By incorporating a variable-gain amplifier and patch antenna, the sensor achieves a 20 dB/decade voltage gain. Experimental results demonstrate a significant improvement in voltage gain compared to other architectures.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Engineering, Electrical & Electronic
Wei Li, Ruizhi Chen, Yuan Wu, Haitao Zhou
Summary: Indoor location estimation plays a crucial role in indoor location-based services. Single-chip low-cost millimeter-wave (mmWave) radar is gaining increasing attention as an emerging technology due to its advantages such as penetration ability and low-power consumption. However, most research focuses on hybrid positioning combining mmWave radar with other sensors, and there is a lack of research on single radar indoor positioning. In this article, a novel indoor positioning system based on a single-radar sensor is proposed, which estimates the trajectory using velocity and heading estimation from sparse point clouds. The proposed algorithm shows promising results with positioning accuracy within 1 meter and heading estimation error of 3 degrees.
IEEE SENSORS JOURNAL
(2023)
Article
Energy & Fuels
Shoaib Azizi, Ramtin Rabiee, Gireesh Nair, Thomas Olofsson
Summary: The advancements in sensor and communication technologies have led to rapid growth in applications for occupancy and indoor environmental monitoring in buildings. However, inadequate sensor positioning can affect data reliability, especially in multi-sensor devices. This study found that the positions of PIR and CO2 sensors significantly impact occupancy detection, highlighting the importance of proper sensor placement for accurate data collection.
Article
Instruments & Instrumentation
Yi Xin, Hongyan Liu, Tianyuan Hou, Xuefeng Song, Junye Tong, Meng Cui, Meina Li, Jingjie Zhai
Summary: This paper proposes a noise suppression method for vital sign signal monitoring based on improved wavelet threshold and empirical mode decomposition combined with singular value decomposition (SVD). The method effectively removes noise and improves the signal-to-noise ratio (SNR) for better medical diagnosis.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Multidisciplinary Sciences
Xingyu Yang, Zijian Zhang, Yi Huang, Yalin Zheng, Yaochun Shen
Summary: This research proposes an image segmentation-based method for extracting vital signs from video and mm-wave radar signals. Compared to existing methods, this approach utilizes time-frequency spectrograms, resulting in improved accuracy and stability in heart rate and respiration rate extraction.
SCIENTIFIC REPORTS
(2022)
Article
Computer Science, Information Systems
Malith Maheepala, Matthew A. Joordens, Abbas Z. Kouzani
Summary: This article presents an indoor positioning device based on 2-D infrared laser beams and a novel positioning algorithm. The device offers high accuracy and low power consumption, making it suitable for various applications in single-room positioning.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Luyao Liu, Jie Zhang, Ying Qu, Sen Zhang, Wendong Xiao
Summary: In this paper, we propose a system called mmRH that uses FMCW millimeter-wave radar to accurately estimate respiration rate (RR) and heart rate (HR). The system includes modules for vital sign signal extraction, differential enhancement, signal decomposition, and vital sign rate reconstruction. Extensive experiments show that mmRH effectively suppresses noise, clutter interference, and respiration harmonics, and improves the accuracy of RR and HR detection compared to existing methods.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Biomedical
Elias Antolinos, Jesus Grajal
Summary: The use of radar technology for contactless monitoring of cardiorespiratory activity has been extensively studied in the past two decades. This article compares the application of continuous-wave (CW) and linear-frequency-modulated continuous-wave (LFMCW) radars in vital sign monitoring scenarios. Results show that both configurations are capable of measuring general metrics, but LFMCW offers better results in identifying cardiac events and extracting certain derived biomarkers.
IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Yining Zhang, Haixin Song, Ranran Zhou, Woogeun Rhee, Inbo Shim, Zhihua Wang
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2019)
Article
Engineering, Electrical & Electronic
Haixin Song, Dang Liu, Yining Zhang, Woogeun Rhee, Zhihua Wang
IEEE JOURNAL OF SOLID-STATE CIRCUITS
(2020)
Article
Engineering, Electrical & Electronic
Jiahao Zhao, Yining Zhang, Kunnong Zeng, Woogeun Rhee, Zhihua Wang
Summary: This paper presents a 2.4GHz crystal-less GMSK/GFSK phase-tracking receiver with a multiphase bang-bang PLL as an auxiliary loop for multibit oversampled demodulation, improving demodulation SNR. Experimental results show that the receiver achieves high slew-rate transient performance for increased frequency deviation with multiphase BBPLL-based demodulation.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
Article
Engineering, Electrical & Electronic
Xinyu Xu, Zixiang Wan, Woogeun Rhee, Zhihua Wang
Summary: This paper presents a bias-current-free fractional-N hybrid phase-locked loop (HPLL) architecture with linear phase detection and technology scalability under low supply voltage. Through a specific control path and modulation method, high-performance low-voltage clock generation and modulation systems are achieved.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2021)
Article
Engineering, Electrical & Electronic
Meng Ni, Xiao Wang, Fule Li, Woogeun Rhee, Zhihua Wang
Summary: This paper introduces an improved correlation-based timing-skew calibration strategy by implementing a TI-RADC and aligning the sampling edges of TI-ADC and TI-RADC. The proposed technique effectively suppresses spurs resulting from time-variant input impedance and achieves high SNDR and low power consumption.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2022)
Article
Computer Science, Information Systems
Bowen Wang, Haixin Song, Woogeun Rhee, Zhihua Wang
Summary: This paper provides a brief overview of Ultra-WideBand (UWB) techniques, including Impulse-Radio UWB (IR-UWB) and Frequency-Modulation UWB (FM-UWB), as well as the link margin enhancement and power consumption reducing techniques. The potential applications of IR-UWB in transceiver architectures are discussed, highlighting its promise for secure mobile Internet of Things (IoT) applications.
TSINGHUA SCIENCE AND TECHNOLOGY
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Xinyu Xu, Woogeun Rhee, Zhihua Wang
2020 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Bowen Wang, Woogeun Rhee, Zhihua Wang
2020 IEEE RADIO FREQUENCY INTEGRATED CIRCUITS SYMPOSIUM (RFIC)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Haixin Song, Woogeun Rhee, Zhihua Wang
2020 IEEE CUSTOM INTEGRATED CIRCUITS CONFERENCE (CICC)
(2020)
Article
Engineering, Electrical & Electronic
Xuqiang Zheng, Fangxu Lv, Lei Zhou, Danyu Wu, Jin Wu, Chun Zhang, Woogeun Rhee, Xinyu Liu
IEEE JOURNAL OF SOLID-STATE CIRCUITS
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Cong Ding, Haixin Song, Woogeun Rhee, Zhihua Wang
2019 IEEE ASIAN SOLID-STATE CIRCUITS CONFERENCE (A-SSCC)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Xiaohua Huang, Kunnong Zeng, Yuguang Liu, Woogeun Rhee, Taeik Kim, Zhihua Wang
2019 IEEE CUSTOM INTEGRATED CIRCUITS CONFERENCE (CICC)
(2019)
Proceedings Paper
Computer Science, Hardware & Architecture
Kunnong Zeng, Woogeun Rhee, Zhihua Wang
2019 IEEE INTERNATIONAL CONFERENCE ON ELECTRON DEVICES AND SOLID-STATE CIRCUITS (EDSSC)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Yining Zhang, Jiahao Zhao, Woogeun Rhee, Zhihua Wang
2019 INTERNATIONAL SYMPOSIUM ON VLSI DESIGN, AUTOMATION AND TEST (VLSI-DAT)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Yuguang Liu, Haixin Song, Kunnong Zeng, Woogeun Rhee, Zhihua Wang
2019 INTERNATIONAL SYMPOSIUM ON VLSI DESIGN, AUTOMATION AND TEST (VLSI-DAT)
(2019)
