효율적인 신호분리기법을 이용한 근접한 두 사람들의 비접촉식 생체신호 탐지 = Non-Contact Vital Sign Detection of Two Humans at the Same Distance Using Efficient Signal Decomposition

다국어 초록 (Multilingual Abstract)

Recently, non-contact vital sign(i.e. respiratory and cardiac rate) detection(VSD) techniques based on radar sensors have been developed for several applications in the medical, Internet of Things(IoT), and military fields. However, if two humans are located at the same distance, the VSD of these methods may fail. This is because the two humans yield mixed and complicated echo signals, thereby making the VSD task quite difficult. To overcome this problem, several signal decomposition methods, such as variational mode decomposition and multiple signal classification, have been developed. Nevertheless, mixed echo signals from two humans at the same distance cannot be decomposed. In this study, we propose a new signal decomposition method to achieve the VSD of humans at the same distance. In particular, the proposed method can simply decompose I- and Q-channel parts of a mixed echo signal into the individual phase fluctuations corresponding to each human, thereby providing improved computational efficiency. In experiments using the impulse-radio ultra-wideband radar, it was observed that the proposed algorithm can successfully achieve the VSD of two humans at the same distance.

참고문헌 (Reference)

1 최인오, "원하지 않는 작은 동작에 의한 잡음 환경 내 생체신호 탐지 기법" 한국전자파학회 30 (30): 418-426, 2019

2 이지훈, "원거리에서 측정 가능한 호흡 및 심박 수 측정을 위한 도플러 레이더 시스템" 한국전자파학회 25 (25): 418-425, 2014

3 E. Schires, "Vital sign monitoring through the back using an UWB impulse radar with body coupled antennas" 12 (12): 292-302, 2018

4 F. Adib, "Smart homes that monitor breathing and heart rate" 837-846, 2015

5 C. Ding, "Noncontact multiple target vital sign detection based on VMD algorithm" 727-730, 2017

6 고인창, "IR-UWB 레이다 기반의 무호흡 검출 및 호흡수 측정" 한국전자파학회 28 (28): 802-809, 2017

7 Q. Lv, "High dynamic-range motion imaging based on linearized Doppler radar sensor" 62 (62): 1837-1846, 2014

8 H. Lee, "A novel vital-sign sensing algorithm for multiple subject based on 24-GHz FMCW Doppler radar" 11 (11): 1237-, 2019