Doppler Cardiogram Detected by a V-Band Doppler Radar Sensor

• DOI: 10.1109/tmtt.2021.3128591
• Publication Date: 2021-12-02T20:22:32Z
• Authors: Chengkai Zhu; Marcel Balle; Bin Zhang; Qinyi Lv; Yun Li; Zhongbo Zhu; Xinbo Wang; Xiaojun Li; Lixin Ran
• Keywords: Heart beat

Capable of remote presentations human heart activities, the Doppler cardiogram (DCG) can be detected by an agile radar sensor. However, as a recently developed technology, its performance needs sustained improvements for future practical applications. In this work, continuous-wave, <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${V}$ </tex-math></inline-formula> -band sensor was implemented to improve discrimination receiver, detecting micrometer-level details heartbeat motions conducted chest skin. Besides, new algorithms were derived achieve high linearity, demodulate phases and retrieve fine DCG waveforms. Experimental measurements different subjects showed significantly enhanced robustness accuracy. The obtained results imply promising potential DCGs in wide application scenarios such medical wisdom personal healthcare.