title: Measurement of human heartbeat and respiration signals using phase detection radar.
abstract: This article introduces a low-cost phase detection radar aimed at measuring the human heartbeat and respiration signals without any physical connections to the human body. A continuous-wave radar targeting the chest will detect the phase difference, resulted by the time-varying target position of the heartbeat, between the transmitted signal and the reflected signal. We have tested the developed radar to measure the heartbeat and respiration signals at a distance of about 40 cm from the chest.
authors.affiliation: Department of Wireless Communications Engineering, Kwangwoon University, 447-1, Wolgye-Dong, Nowon-Gu, Seoul 139-701, Korea.
authors.forename: Hyoung Jong
authors.initials: HJ
authors.lastname: Kim
authors.forename: Ki Ho
authors.initials: KH
authors.lastname: Kim
authors.forename: Yun Seok
authors.initials: YS
authors.lastname: Hong
authors.forename: Jin Joo
authors.initials: JJ
authors.lastname: Choi
mesh_terms: D003936:Diagnosis, Computer-Assisted / Q000295:instrumentation* / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006334:Heart Function Tests / Q000295:instrumentation*; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D011825:Radar / Q000295:instrumentation*; D015203:Reproducibility of Results; D012129:Respiratory Function Tests / Q000295:instrumentation* / Q000379:methods; D015656:Respiratory Mechanics / Q000502:physiology*; D012680:Sensitivity and Specificity