I/Q Channel Selection for 24 GHz CW Radar to Non-Contact Vital Signs Detection for Health Check System

With the increasing improvement of quality of life (QOL), health has become an item of concern. However, owing to Covid-19, most organizations cannot do annual health check-ups because they require contact with people and it is difficult to maintain social distance. Consequently, in an era of increasing epidemics, non-contact methods are paramount. In this paper, we present a non-contact breathing and heart rate measurement system integrated into an application using 24 GHz medical radar to support the health check work. In this system, we solve the problem of imbalance between the two signal channels of the radar to increase the accuracy of the breathing and heart rate extraction. © 2022 IEEE.