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A concurrent dual-band radar sensor for vital sign tracking and short-range positioning

  • Zi-Kai Yang , Wen-Kui Liu , Sheng Zhao und Xiang-Dong Huang EMAIL logo
Veröffentlicht/Copyright: 19. August 2020
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Abstract

This paper presents a concurrent dual-band radar system for noncontact tracking of vital signs (e.g., respiration and heartbeat), and indoor short-range localization. The proposed sensor, which has been achieved with our own customized concurrent dual-band subsystems, operates at 1.67 and 2.06 GHz synchronously. Based on the Doppler principle, tiny vital signs are obtained by analysis of spectrum of the signals received at each individual frequency band. Moreover, the location of a target is estimated based on the phase difference between these two closely spaced frequencies. The azimuth information is obtained by beam scanning. Combining the results of range and azimuth information allows the radar system to plot two-dimensional maps. As a result, the proposed radar is capable of monitoring human’s life activities and tracking the location of individuals continuously. System-level experiments were carried out to reveal the versatile capability of the life activity monitoring system.


Corresponding author: Xiang-Dong Huang, School of Electronic Information Engineering, Tianjin University, Tianjin, 300072, China, E-mail:

  1. Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article

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Received: 2019-12-10
Accepted: 2020-07-09
Published Online: 2020-08-19
Published in Print: 2020-11-26

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