IQ Signal Demodulation for Noncontact Vital Sign Monitoring Using a CW Doppler Radar: A Review

被引：30

作者：

Wang, Fu-Kang ^{[1
]}

Zhong, Ji-Xun ^{[2
]}

Shih, Ju-Yin ^{[3
]}

机构：

[1] Natl Sun Yat sen Univ, Dept Elect Engn, Kaohsiung, Taiwan

[2] Natl Sun Yat sen Univ, Dept Elect Engn, Kaohsiung, Taiwan

[3] Natl Sun Yat sen Univ, Dept Elect Engn, Kaohsiung, Taiwan

来源：

IEEE JOURNAL OF ELECTROMAGNETICS RF AND MICROWAVES IN MEDICINE AND BIOLOGY | 2022年 / 6卷 / 04期

关键词：

noncontact detection; null-point issue; signal demodulation; vital sign; Doppler radar; INJECTION-LOCKED RADAR; CONTINUOUS-WAVE RADAR; HEART-RATE; QUADRATURE IMBALANCE; TRANSFORM; RANGE; COMPENSATION; DISPLACEMENT; ALGORITHM; BENEFITS;

D O I：

10.1109/JERM.2022.3214753

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Using a Doppler radar for noncontact detection is a promising way to monitor vital signs of a subject more conveniently than other common contact medical devices, but has many challenges including null-point issue, dc offset, and nonlinear distortion. The wireless property of a radar system easily affects the Doppler signals, so it needs a demodulation method to obtain the vital sign information. Furthermore, detecting precise information for respiration rate (RR) and heart rate (HR) of the subject needs further signal processing to extract the target signals from the demodulated signals at various interference levels. Hence, this study reviews research on continuous-wave (CW) Doppler radar, signal demodulation and subsequent signal processing to address the problems for noncontact vital sign monitoring.

引用

页码：449 / 460

页数：12

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