UR-Sense: Ubiquitous respiration sensing with UWB radar

Traditional respiration measurement methods require attaching devices or sensors to the subject's body, which can cause discomfort, skin irritation, and the risk of infection. Contactless respiration measurement methods overcome these issues, enabling more efficient and convenient health monitoring. However, most existing contactless respiration monitoring studies assume that subjects remain stationary in a fixed position. This paper introduces UR-Sense, a system that continuously finds a subject's location in daily life without restricting their movements or activities. Experimental results demonstrate that UR-Sense achieves an average respiration estimation accuracy of over 92 % in everyday scenarios, regardless of the subject's mobility and movements.