Abstract

Info

Author(s):: ZHOU Hengji1; YANG Yihan2; 3; HU Yuanhui2; CHU Yuguang2; SHOU Xintian2; 3; YOU Yaping2; XUE Wenjing2; 3; FAN Shaowei2; WANG Yong1; SHEN Huiliang1; 1. College of Engineers, Zhejiang University, Hangzhou 315000, China 2. Department of Cardiology, Guanganmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China 3. Graduate School of Beijing University of Chinese Medicine, Beijing 100029, China

Keywords:: Keywords: atrial fibrillation millimeter-wave radar signal processing non-contact real-time

Abstract:: A novel technology is proposed for non-contact and real-time detection of atrial fibrillation using millimeter-wave radar. A 60 GHz PCR millimeter wave radar is used to continuously detect the chest echo signal of the subject. After signal acquisition, I-Q signal is generated through I-Q demodulation, and the signal phase information is extracted using effective points phase trend evaluation for obtaining the signals from oscillations in the chest wall, from which the respiratory signals and cardiac signals are extracted through digital filtering for the analysis of cardiac movement. Whether the atrial fibrillation occurs or not is determined by the characteristics of atrial fibrillation wave in the time domain. The effective points phase trend evaluation for extracting more accurate signal phase information and the time-domain method for real-time atrial fibrillation detection are the innovations of the study. The experimental results show that the proposed method achieves a detection accuracy of 99.2% in clinic.