Radar methods of detection of human breathing and heartbeat

Improved human respiration detection method via ultra‐wideband radar in through‐wall or other similar conditions

“…Therefore, the non‐contact detection of survivors is the objective of active research in recent years. The vital sign electromagnetic detection is an advanced non‐contact detection technique which extracts information from observations on human subject [1]. Ultra‐wideband (UWB) radar has been applied to through‐wall imaging, ground penetrating radar, detection of moving targets and so on due to its high penetrability and high range resolution [2–5].…”

Review of micro‐Doppler signatures

“…Observing, measuring, and monitoring vital signs, such as heartbeat rate, pulse rate, or breathing rate, are very important for conducting medical triage, patient monitoring, and stationary human detection, as well as finding victims buried in earthquakes or building collapses. Micro‐Doppler returns can be modulated by vital signs including heartbeats moving the skin, breathing moving the thorax, and vibration in larynx while talking [99–107].…”

Radar-Based Non-Contact Continuous Identity Authentication

“…Doppler radar has been used in widespread applications, including weather forecasting, vehicle speed measurement, structural health monitoring, and the monitoring of air and sea traffic [1]. This technology has most recently been recognized for promise in healthcare applications though long term unobtrusive physiological monitoring [2][3][4][5][6]. The fundamental Doppler principle is illustrated in Figure 1a, where a reflected signal undergoes a phase shift due to the subtle movement of the chest surface caused by heartbeat and respiration [4][5][6][7][8].…”

“…This technology has most recently been recognized for promise in healthcare applications though long term unobtrusive physiological monitoring [2][3][4][5][6]. The fundamental Doppler principle is illustrated in Figure 1a, where a reflected signal undergoes a phase shift due to the subtle movement of the chest surface caused by heartbeat and respiration [4][5][6][7][8]. Doppler radar remote life sensing of humans has been widely reported, with proof of concepts demonstrated for various applications [7,8].…”