Remote heartbeat monitoring from human soles using 60-GHz ultra-wideband radar

Abstract

Measurement of heartbeats is essential in cardiovascular magnetic resonance imaging because the measurement must be synchronized with the phase of cardiac cycles. Many existing studies on radar-based heartbeat monitoring have focused on echoes from the torso only, and such monitoring cannot be applied to subjects in magnetic resonance scanners because only the head and soles can be seen from the outside. In this study, we demonstrate the feasibility of the remote monitoring of heartbeats from the subject's soles using a 60-GHz ultra-wideband radar. The heartbeat intervals measured using the radar are quantitatively compared with those measured using conventional electrocardiography.

An impulse radio duty-cycled radar with ultra-wideband VCO using frequency hopping technique

“…The trend of healthcare development is to capture one's body physiological information and provide long-term monitoring, which can rely on a non-contact and real-time vital-sign radar to detect the movement of chest with reciprocal characteristic [1,2,3]. The Doppler radars [4,5] with continuous wave (CW) or frequency modulated continuous-wave (FMCW) are widely used in long distance detection, vital-sign sensing, and through-wall detection [6,7,8] due to its excellent tracking ability and high sensitivity.…”

“…In this paper, we adopt an UWB radar [12,13,14,15,16,17,18,19] with frequency hopping technique to mitigate the narrowband interference and then detect vital signs. The RF generator with wide switchable oscillated frequencies as the sequential narrow radio pulses is utilized in the transmitter of radar.…”

Low-power low-data-loss bio-signal acquisition system for intelligent electrocardiogram detection

“…Blood is pumped from the veins into the heart and arteries and synchronously generates electrical excitement with mechanical contraction. Electrocardiogram (ECG) is a monitoring system that can record the potential difference between two electrodes attached to the body surface through wires [2].…”

A novel time of arrival estimation algorithm using an energy detector receiver in MMW systems

“…Sixty gigahertz millimeter wave (MMW) is a promising technology for accurate TOA estimation due to its unique advantages which include high time resolution [1], high multipath resolution [2], and robustness to interference [3]. In the 60-GHz frequency band, an energy detector (ED) receiver is preferred for TOA estimation because it can be implemented easily in hardware and does not require precise channel estimation and synchronization as with a matched filter (MF) [4].…”