IEEE Access (Jan 2021)

Target Range Selection of FMCW Radar for Accurate Vital Information Extraction

  • Ho-Ik Choi,
  • Heemang Song,
  • Hyun-Chool Shin

DOI
https://doi.org/10.1109/ACCESS.2020.3043013
Journal volume & issue
Vol. 9
pp. 1261 – 1270

Abstract

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Frequency modulated continuous wave (FMCW) radar, which can detect the range and small displacement of a target, has been used for contactless vital information extraction. For accurate vital sign (respiration and heartbeat) measurement, a precise selection of the target range bin, where vital information exists, is important. In this paper, an effective method for selecting the range bin with accurate vital information is proposed. The proposed method is based on the newly introduced magnitude-phase coherency (MPC) index. The experimental results show that the vital information extracted by the proposed method is more accurate than those by conventional methods, indicating that the proposed range bin selection based on MPC is an effective method for extracting accurate respiration and heartbeat rates.

Keywords