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Article

Selecting Target Range with Accurate Vital Sign Using Spatial Phase Coherency of FMCW Radar

1
Department of Electrical Engineering, Pohang University of Science and Technology, Pohang 37673, Korea
2
Department of Electronic Engineering, Soongsil University, Seoul 06978, Korea
3
Department of Software Convergence, Soongsil University, Seoul 06978, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Amerigo Capria
Appl. Sci. 2021, 11(10), 4514; https://doi.org/10.3390/app11104514
Received: 29 March 2021 / Revised: 10 May 2021 / Accepted: 13 May 2021 / Published: 15 May 2021
(This article belongs to the Special Issue Radar Signal Processing)
Respiration and heartbeat are basic indicators of the physiological state of human beings. Frequency-modulated continuous wave (FMCW) radar can sense micro-displacement in the human body surface without contact, and is used for vital-sign (respiration and heartbeat) monitoring. For the extraction of vital-sign, it is essential to select the target range containing vital-sign information. In this paper, we exploit the coherency of phase in different range-bins of FMCW radar to effectively select the range-bins that contain accurate signals for remote monitoring of human respiration and heartbeat. To quantify coherency, the spatial phase coherency (SPC) index is introduced. The experimental results show that the SPC can select a range-bin containing more accurate vital-sign signals than conventional methods. This result demonstrates that the proposed method is accurate for monitoring of vital signs by using FMCW radar. View Full-Text
Keywords: FMCW radar; respiration; heartbeat; range selection; spatial phase coherency FMCW radar; respiration; heartbeat; range selection; spatial phase coherency
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MDPI and ACS Style

Choi, H.-I.; Song, W.-J.; Song, H.; Shin, H.-C. Selecting Target Range with Accurate Vital Sign Using Spatial Phase Coherency of FMCW Radar. Appl. Sci. 2021, 11, 4514. https://doi.org/10.3390/app11104514

AMA Style

Choi H-I, Song W-J, Song H, Shin H-C. Selecting Target Range with Accurate Vital Sign Using Spatial Phase Coherency of FMCW Radar. Applied Sciences. 2021; 11(10):4514. https://doi.org/10.3390/app11104514

Chicago/Turabian Style

Choi, Ho-Ik, Woo-Jin Song, Heemang Song, and Hyun-Chool Shin. 2021. "Selecting Target Range with Accurate Vital Sign Using Spatial Phase Coherency of FMCW Radar" Applied Sciences 11, no. 10: 4514. https://doi.org/10.3390/app11104514

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