Respiratory Motion Imaging Using 2.4-GHz Nine-Element-Array Continuous-Wave Radar

Abstract

A radar system with antenna array and signal processing method are presented for noncontact monitoring of human respiration. We develop a 2.4-GHz nine-element radar system and use it to measure the respiratory rate of a participant lying on a bed. The results show that this system and method can image a respiring body and estimate its instantaneous respiration rate accurately. The accuracy of the proposed system is validated by simultaneously recording the ribcage circumference using a piezoelectric respiratory sensor and the 3-D body shape using a depth camera. The results indicate the potential of this system for long-term respiratory monitoring during sleep periods.

A Review of Recent Innovations in Remote Health Monitoring

“…Refs. [29][30][31][32][33] introduces on-body wearable antenna design applications and [34][35][36][37][38][39][40][41][42] targets mainly detection along with imaging systems. Table 2 provides the summary of reported studies based on remote health monitoring devices.…”

“…In [39], a 2.4 GHz continuous wave (CW) coupled with a 2D nine-element antenna array radar system that uses a signal processing technique is presented for remote monitoring of the human respiratory rate system. Measurement results indicate that the proposed design is capable of imaging the respiratory system within the body and obtaining a precise respiration rate for it.…”

“…Onbody wearable antenna design applications are discussed in [29][30][31][32][33], shedding light on the wearable aspect of health monitoring. Lastly, we examine detection and imaging systems in [34][35][36][37][38][39][40][41][42], showcasing the versatile applications of remote health monitoring. The second part of this paper is dedicated to presenting the methods executed in these monitoring systems [43][44][45][46][47][48][49][50][51][52][53][54][55].…”