Investigation of vital signs monitoring errors due to subject's orientation, clothing and distance from a SFCW radar

Abstract

In this paper, a stepped frequency continuous wave (SFCW) radar is utilized to investigate the effect of subject orientation, cloth, and location in detected vital sign accuracy. The accuracy of SFCW radar to detect cardiac rate is validated using a full-wave electromagnetic scattering model and compared to experimental results. Effect of subject's clothing, position (orientation), and range have been experimentally investigated and acceptable heart rate identification has been demonstrated.