The UWB monitoring of respiration rate (RR) and heart rate (HR) has been studied in references as an alternative to the Doppler-based systems. The main advantage of UWB signals over the microwave Doppler radars is good material penetration. ![]() However, the Doppler systems have difficulty in penetrating materials and the null point problem. ![]() An alternative for the non-invasive detection of vital signs is microwave Doppler radar. Non-invasive monitoring is much more appropriate in situations where it is difficult to use complicated wired connections, such as ECG monitoring for infants, burn victims or people buried during building collisions. The main reason for the usefulness of UWB sensors in medical applications is its low power consumption and large spatial resolution. IR UWB technology has many applications due to: its robustness in a harsh environment, high precision ranging at the centimeter level, and its higher penetration capabilities. It may also be helpful for the continuous monitoring of a person while typing on a computer, driving a vehicle or sleeping on a bed. The deployment of an IR UWB vital measurement system may be used for the trivial vital signs monitoring of patients at home. The capability of non-invasive measurement of vital sign parameters of the human body is very useful in medical engineering. UWB sensors detect the macro as well as micro movement inside the human body. Since the legalization of UWB by the FCC in 2002, UWB technology has awakened great interest in wireless communication and radar sensor applications. Recently, the Ultra-Wide Band (UWB) regulations have been adopted to allow unlicensed operation in the range of 3.1 and 10.6 GHz.
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