A Single-Chip Single-Antenna Radar for Remote Vital Sign Monitoring

Reggad, Hind1,2; Jiang, Xiaonan1,3; Wu, Xiaohu4,5; Amirtharajah, Rajeevan1; Matthews, Dennis6; Liu, Xiaoguang4,5

2023-06-01

10.1109/TMTT.2023.3267554

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES   影响因子和分区

0018-9480

1557-9670

This article proposes an effective way to use self-injection locking (SIL) in a radar system to detect human chest cavity movement for vital signs monitoring with minimal hardware. The proposed approach expands the idea of using a phase-locked loop (PLL) system as a demodulator and a single antenna, making the system more compact. The system includes ON-chip dc offset cancellation for system initialization. This work investigates and compares an LC-based voltage-controlled oscil-lator (LCVCO) and a ring voltage-controlled oscillator (RVCO) in terms of primary sensitivity for motion detection and phase noise. A study of injection-locking of both the LCVCO and RVCO is also established. The study shows that the RVCO is superior to the LCVCO in terms of sensitivity while the phase noise does not differ significantly as the frequencies of interest are very small, i.e., heart rate and respiration are bandwidth-limited to a few hertz. To verify the proposed idea, a design of both systems, an LCVCO-based PLL and an RVCO-based PLL, was implemented in 65 nm CMOS technology at 1.5 GHz. The simulation and measurement results confirm the idea proposed: the RVCO shows better performance across all metrics, e.g., higher sensitivity by 4 dB, lower power consumption by 30%, and reduced area (almost half) compared to the LCVCO.

Doppler radar LC voltage-controlled oscillator locking range (LR) motion detection phase noise ring voltage-controlled oscillator (RVCO) self-injection-locked oscillators sensitivity single-chip CMOS radar vital signs sensor

SCI ; EI

英语

通讯

Cardiac Motion, LLC through the National Science Foundation Phase II STTR[IIP-1660253]

Engineering

Engineering, Electrical & Electronic

WOS:001019427800001

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

20232614289802

Bandwidth ; Circuit oscillations ; CMOS integrated circuits ; Doppler radar ; Oscillistors ; Phase noise ; Radar antennas ; Tracking radar ; Variable frequency oscillators

Magnetism: Basic Concepts and Phenomena:701.2 ; Electric Networks:703.1 ; Oscillators:713.2 ; Electronic Circuits Other Than Amplifiers, Oscillators, Modulators, Limiters, Discriminators or Mixers:713.5 ; Semiconductor Devices and Integrated Circuits:714.2 ; Information Theory and Signal Processing:716.1 ; Radar Systems and Equipment:716.2

ENGINEERING

Web of Science

1.Univ Calif Davis, Dept Elect & Comp Engn, Davis, CA 95616 USA
2.Draper Inc, Cambridge, MA 02139 USA
3.Qualcomm Inc, San Diego, CA 92121 USA
4.Univ Calif Davis, Davis, CA 95616 USA
5.Southern Univ Sci & Technol SUSTech, Shenzhen 518055, Peoples R China
6.Cardiac Motion LLC, Truckee, CA 96161 USA

Reggad, Hind,Jiang, Xiaonan,Wu, Xiaohu,et al. A Single-Chip Single-Antenna Radar for Remote Vital Sign Monitoring[J]. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES,2023,PP(99):1-14.

Reggad, Hind,Jiang, Xiaonan,Wu, Xiaohu,Amirtharajah, Rajeevan,Matthews, Dennis,&Liu, Xiaoguang.(2023).A Single-Chip Single-Antenna Radar for Remote Vital Sign Monitoring.IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES,PP(99),1-14.

Reggad, Hind,et al."A Single-Chip Single-Antenna Radar for Remote Vital Sign Monitoring".IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES PP.99(2023):1-14.